St. Charles MO Short-Term Rental Regulations: 2026 Guide

If you’re researching short-term rental regulations for “St. Charles,” the first thing to confirm is which St. Charles you mean. The St. Charles metro on the Missouri side of the St. Louis area is a six-jurisdiction stack—St. Charles County, the City of St. Charles, St. Peters, O’Fallon, Lake Saint Louis, and Wentzville—each with its own rules, tax stack, and enforcement posture. Most general guides treat “St. Charles” as a single market. That oversimplification is how owners end up over-collecting on one tax, missing another entirely, or buying a property in a jurisdiction that won’t license it.

We manage St. Charles–area short-term rentals year-round, and the regulatory landscape across these six jurisdictions has shifted meaningfully in 2024–2026: the City of St. Charles capped residential STRs at 48 units in the Extended Historic Preservation District, St. Charles County introduced its first STR-licensing ordinance (Bill 5490) on May 11, 2026, and Missouri’s General Assembly continues to debate—but has not yet enacted—an STR property-tax classification reform. This guide walks through every jurisdiction’s current STR rules as of May 2026, the consolidated tax stack guests actually pay, and the operator-perspective traps we see owners fall into in this metro.

What Most Regulations Content Misses: The County–City–Suburb Stack

The reason “St. Charles MO STR regulations” returns confused search results—including, frequently, pages about St. Charles, Illinois (a Chicago suburb 300 miles away)—is that the actual regulatory landscape is layered, not unified. Every short-term rental in the St. Charles MO metro is subject to:

1. Missouri state law, including the 4.225% state sales tax and the statutory framework governing local taxing authority (RSMo Chapters 67, 71, 77, 79, 94, and 144).
2. St. Charles County’s overlay, principally the 5% Sleeping Room Tax (RSMo §67.1158) plus the county’s general sales tax of 1.725% and—if Bill 5490 is adopted—a pending licensing-and-inspection regime for unincorporated areas.
3. The city’s STR-specific or default framework, which varies dramatically: the City of St. Charles has a hard 48-unit cap and EHP-only restriction; the other five jurisdictions have no STR-specific ordinance and default to rental-occupancy permits, general business licenses, and standard zoning.
4. The HOA or community-association layer, which in Lake Saint Louis is operationally the most consequential restriction—the Lake Saint Louis Community Association (LSLCA) Indentures govern thousands of homes with lake rights, and STR provisions in those Indentures are member-gated and must be reviewed individually.

Buying a property without understanding all four layers is the most common owner mistake in this metro.

Missouri State-Level Framework

Missouri has no statewide short-term rental preemption statute. Cities and counties retain broad authority under RSMo Chapters 71, 77, and 79 to regulate STRs through zoning, business licensing, and police power. The 2024–2026 General Assembly has considered several STR-related bills, but every one of them has addressed property-tax classification (whether STRs should be assessed as residential or commercial property), not preemption of local STR regulation:

• HB 1086 (2025 session), sponsored by Rep. Chris Brown (R–Kansas City), would have classified STRs as residential property for property-tax assessment, keeping them at the 19% residential assessment rate rather than the 32% commercial rate. The bill passed the Missouri House 118–34 and received a Senate Local Government, Elections and Pensions Committee public hearing on March 24, 2025, but died at the end of the 2025 session.
• SB 1066 (2026 session) passed the Missouri Senate 30–3 on March 25, 2026, and is currently before the House Special Committee on Tax Reform.
• HCS HBs 1768 & 2060 (2026 session) passed the Senate Local Government, Elections and Pensions Committee on April 20, 2026.
• SB 1001 (2026 session), sponsored by Sen. Adam Schnelting, contains substantially similar STR property-tax classification language.

None of these bills, if enacted, would preempt city or county STR licensing, zoning, or operational regulation. Local control over STR operations remains intact. (Owners and operators sometimes confuse these bills with Missouri HB 595 (2025), which Governor Mike Kehoe signed on July 14, 2025 with an effective date of August 28, 2025—but HB 595 addresses tenant rights, source-of-income discrimination, and security-deposit caps, not short-term rentals.)

Missouri state sales tax (4.225%) applies to short-term rental charges under RSMo Chapter 144. Operators must register with the Missouri Department of Revenue for a sales-tax license, typically via Form 2643. Current rates by ZIP code are available through the MO DOR rate-table page.

RSMo §479.353 caps municipal ordinance fines at $200 for the first violation, $275 for the second, $350 for the third, and $450 for the fourth and subsequent violations within a rolling 12-month window. This cap applies to every municipal STR enforcement action in the metro—worth knowing before any city advertises a higher penalty.

St. Charles County Overlay

The 5% Sleeping Room Tax

Every short-term rental anywhere in St. Charles County—regardless of which city or unincorporated area it sits in—is subject to a 5% county sleeping-room tax under RSMo §67.1158. Voters approved the tax on November 3, 1992, and it is collected by the St. Charles County Convention and Sports Facilities Authority (CSFA). The tax applies to the first 31 days of any guest’s stay.

The Missouri Court of Appeals upheld the tax’s broad reach in St. Charles County Convention & Sports Facilities Authority v. Mydler, 950 S.W.2d 668 (Mo. App. 1997), ruling that bed-and-breakfast establishments are “hotels” for purposes of the tax. CSFA takes the position that the same reasoning extends to whole-house short-term rentals, and its public guidance explicitly covers “any other entity furnishing or leasing sleeping rooms to transient guests.” STR-coverage by analogy to Mydler has not been separately litigated, but the operational expectation is that the 5% applies.

Critical platform note: Airbnb automatically collects the 5% St. Charles County sleeping-room tax on bookings under 31 nights, per Airbnb’s Missouri occupancy-tax guidance. Operators using Airbnb should NOT separately remit the 5% to CSFA for Airbnb-booked nights—doing so creates a double-payment. Vrbo does not have a Missouri tax-collection arrangement, so Vrbo and direct-booking nights require operator remittance to CSFA directly.

Bill 5490 (Proposed, Not Yet Codified)

Council member Tim Baker introduced Bill 5490 at the St. Charles County Council meeting on May 11, 2026, proposing the county’s first STR-specific ordinance for unincorporated areas. As reported by First Alert 4 and Fox2Now, the proposal would:

• Create a licensing-and-inspection program for STRs in unincorporated St. Charles County.
• Require a 600-foot buffer between STR properties.
• Cap overnight occupancy and the number of vehicles permitted at each property.
• Require a local contact reachable by police and code enforcement.
• Carry penalties of up to $500 in fines or 30 days in jail for operating without a license.
• Require inspections (cadence not specified in the introduced bill).

Baker estimated there are 40 to 50 STRs currently operating in unincorporated St. Charles County, many in the wine country around Augusta, Defiance, and New Melle. Describing the county’s current lack of enforcement tools, he told First Alert 4, “We tell them we had issues and it doesn’t go anywhere, so we’re trying to put some teeth to our hammer.”

As of mid-May 2026, Bill 5490 has been introduced only—no committee vote, no public hearing, no adoption. Fox2Now reports that “the proposal appears to still be evolving with additional restrictions possible.” Operators with property in unincorporated St. Charles County should monitor the St. Charles County Council agenda for committee action and public-hearing dates.

County Lodging-License Threshold

Under existing St. Charles County code, lodging establishments with 5 or more guest rooms require a two-year lodging license from the County Division of Environmental Health and Protection. A typical single-family STR—generally 2 to 5 bedrooms—falls below this threshold and does not require this lodging license today. Bill 5490 would change that for unincorporated properties by adding STR-specific licensing regardless of room count.

County Sales Tax

The St. Charles County general sales tax of 1.725% applies countywide. Itemized by the city Finance departments of O’Fallon and Wentzville, the components are: General 0.50% + Transportation 0.50% + Operating 0.25% + Capital 0.25% + Children & Family 0.125% + Metro Park 0.10% = 1.725%.

City of St. Charles — The Only Regulated Jurisdiction

The City of St. Charles is the only one of the six jurisdictions with an STR-specific ordinance in force. The framework has tightened steadily since 2022:

• Ordinance #22-104 (passed August 2, 2022) created the original STR licensing framework.
• Ordinance #24-085 imposed a one-year moratorium on new residential STRs from June 15, 2024 through June 15, 2025.
• The April 15, 2025 amendment lifted the moratorium but capped residentially-zoned STRs at 0.15% of total housing units, restricted new residential STRs to the Extended Historic Preservation District (EHP) only, and retained the 500-foot buffer.

With approximately 31,744 housing units in the city, 0.15% works out to 48 units, which is the current cap. Per the City’s official STR page, “the City is currently at the maximum units allowed and is not accepting new applications for residentially zoned STRs.”

What’s Required for an Approved STR

Where residential STR permits are still issuable (which today means almost exclusively transfers of existing approved permits, plus commercial-zone properties in the EHP), the City’s framework includes:

• Conditional Use Permit (CUP) approval before applying for an STR Permit, for residentially zoned STRs.
• Annual STR Permit, with applications received after July 1 prorated by half (proration does not apply to renewals).
• 500-foot buffer between any two residential STRs (measured property line to property line).
• One off-street parking space per STR bedroom.
• STR use restricted to the primary structure (no ADU rentals).
• Annual safety inspection scheduled by city staff at renewal.
• Smoke alarms required; carbon monoxide alarms required outside all bedrooms where required by code.
• Guest records maintained for three years.
• No amplified or reproduced sound outside or audible from the property line between 10:00 p.m. and 10:00 a.m.
• No more than one guest turnover between 6:00 p.m. and 6:00 a.m.
• Commercially-zoned properties in the EHP remain accepted for STR approval and are not subject to the residential cap.

The current STR Permit Application and fee schedule are published through the City’s Document Center; operators should download the latest version directly before applying, as the fee schedule is updated annually.

City Tourism License and Convention Center Taxes

The City of St. Charles imposes two gross-receipts business-license taxes on hotel and motel operations under Chapter 620 of the City Code: a 1% Tourism License Tax and an additional 0.75% Convention Center license tax. Filing and payment mechanics for both are governed by Chapter 114 of the City Code; monthly returns are due to the City’s Finance Department by the 20th of the following month. Operators can review the City’s Tourism License Tax page for filing procedures.

Important threshold: Chapter 620’s hotel definition applies to lodging entities with more than eight bedrooms. Most single-family STRs are below this threshold and arguably outside Chapter 620’s tax base. The City has not issued public guidance specifically classifying typical residential STRs as taxable “hotels” under Chapter 620, and operators should obtain a written determination from the City Finance Department before either collecting or omitting these taxes. The City’s STR landing page does not separately enumerate the Tourism License Tax as an STR obligation, suggesting the City does not currently apply it to typical residential STRs—but the ambiguity is worth resolving in writing.

St. Peters — No STR Ordinance; Default Framework

St. Peters, Missouri (population 57,732 per the 2020 Census) has no short-term-rental-specific ordinance. STRs default to:

• Chapter 405 (Zoning and Subdivision Regulations), which does not list “short-term rental” as a permitted, conditional, or special use. The closest analog is bed-and-breakfast, treated as a Special Use Permit category.
• Chapter 605 (Business Licenses and Business Regulations), requiring a general Business License for any commercial operation in the city. Applications go through the city’s CitizenServe portal.
• Occupancy permit requirements at every change of tenancy of a non-owner-occupied dwelling, under the city’s adopted building and property maintenance codes.

Chapter 605 Hotel and Boarding-House License Tax

St. Peters imposes a 5% gross-receipts annual license tax on “hotels, lodging and boarding houses” under Chapter 605 Article II (eCode360 §605.115 et seq.). However, the chapter’s hotel definition is keyed to a minimum bedroom count typical of hotel statutes—operators should review the live Chapter 605 text directly to confirm whether their specific property falls within the licensing base. Typical single-family STRs in St. Peters generally do not meet the hotel threshold, but the city has not issued public STR-specific classification guidance, so a written determination from the City Finance Department is the only reliable answer.

The Sec. 145.035 Transient Guest Tax — and Why Most STRs Are Outside It

St. Peters levies a 2% transient guest tax under City Code §145.035, authorized by RSMo §67.1003. The rate applies to “all sleeping rooms paid by the transient guests of hotels or motels situated in the City.”

Load-bearing carve-out: Sec. 145.035 defines “hotel” as “any building or group of contiguous buildings under the same management occupied as the abiding place of persons, who are lodged with or without meals, in which, as a rule, the rooms are occupied singly for hire, and in which there are more than ten (10) sleeping rooms.” A typical 3–5 bedroom single-family STR is not a “hotel” for purposes of §145.035 and is therefore not subject to the 2% transient guest tax. Avalara and similar tax-aggregator tools sometimes tell hosts to collect this 2% regardless; the City’s own ordinance language carves out properties below 10 sleeping rooms.

St. Peters Sales Tax

The combined sales tax rate in the 63376 ZIP code is up to 8.95%: 4.225% state + 1.725% county + 2.0% city + up to 1.0% special district where applicable. The minimum rate within 63376 outside any special district is 7.95%.

HOA Density

St. Peters is heavily HOA-controlled. Many subdivision indentures impose minimum-lease provisions of 6 or 12 months, which functionally prohibit STR operation without an indenture amendment. There is no central public HOA registry; investors must pull individual subdivision indentures from the St. Charles County Recorder of Deeds before purchase.

O’Fallon — No STR Ordinance; Default Framework

O’Fallon, Missouri has no STR-specific ordinance. The default framework is Chapter 525 (Residential Rental Inspection and Occupancy Requirements), originally adopted via Ordinance No. 5551 effective January 14, 2010 (eCode360 Chapter 525). STRs fall under the same “rental dwelling” definitions as long-term rentals.

Permit and Fee Structure

A Residential Rental Occupancy Permit is required before any rental unit is occupied. Bill No. 7141 (2019) set the permit fees at $75 for single-family and $50 per multi-family unit under City Code Section 500.470(D). Applications go through O’Fallon’s CitizenServe OPLE portal. Renewal is triggered by change of occupant, not by annual cadence.

O’Fallon Transient Guest Tax

O’Fallon’s Finance Department page lists a 5.0% Transient Guest (Lodging) Tax as the current rate. (A higher effective rate is sometimes cited in older news coverage of the 2016 “Destination O’Fallon” economic-development initiative; that overlay applies to a specific business-district context, not city-wide STRs. The current authoritative city-wide rate is 5.0%.)

O’Fallon Sales Tax

The combined sales tax in O’Fallon ZIP codes is approximately 7.95% (4.225% state + 1.725% county + ~2.0% city). Operators should verify the rate for their specific property address using the MO DOR rate-table system.

Inspection and Fire-Safety Posture

The city has multiple independent fire districts (Wentzville Fire Protection District, O’Fallon Fire Protection District, Cottleville Fire Protection District, depending on parcel location). Each may impose its own fire-safety inspection requirements separate from the city’s occupancy permit. Operators should confirm jurisdictional coverage at the parcel level before listing.

Lake Saint Louis — No STR Ordinance; LSLCA Indentures Are the Operative Constraint

Lake Saint Louis, Missouri has no STR-specific ordinance. The default framework is Chapter 525 (Minimum Standards of Maintenance for Rental Dwelling Units), adopted by the Board of Aldermen on December 1, 2008 and effective February 2, 2009 (eCode360 LSL Municipal Code). A Certificate of Occupancy is required at every change of occupants, along with a general Business License under Chapter 605 if the property is operated commercially. Inspections by the Chief Building Official cover habitability, safety, and the standard International Property Maintenance Code provisions.

Why LSLCA Is the Real Restriction

Lake Saint Louis is dominantly controlled by the Lake Saint Louis Community Association (LSLCA), which governs the city’s older residential stock and both private lakes—Lake St. Louis (~600 acres) and Lake Sainte Louise (~85 acres). LSLCA covers thousands of homes with lake rights and publicly cites “more than 8,600 residents” within its boundary.

Critical caveat for prospective STR investors: LSLCA Indentures, CC&Rs, and Rules & Regulations are member-gated and not publicly retrievable from lslca.com. We have not been able to confirm publicly whether the Indentures impose a blanket STR prohibition, a minimum-lease term, or other operational restrictions. The presence of active Airbnb listings within the 63367 ZIP code suggests enforcement is uneven or that some listings sit outside LSLCA-covered subdivisions. Before purchasing any property in Lake Saint Louis with the intent to operate a short-term rental, request the LSLCA Indentures and Rules & Regulations directly from the Association (100 Cognac Ct., Lake St. Louis, MO 63367, 636-625-8276) and pull recorded indentures from the St. Charles County Recorder of Deeds. Several sub-associations exist within LSLCA, including The Seasons at Lake St. Louis Homeowners’ Association, each potentially carrying its own additional restrictions.

The city’s own HOA Resources page directs residents to their sub-association for governing-document disputes. The city does not adjudicate Indenture-based STR prohibitions; that is a private association matter.

Lake Saint Louis Sales Tax

The combined sales tax in Lake Saint Louis ZIP codes ranges from 7.95% to 8.95%: 4.225% state + 1.725% county + 2.0% city + up to 1.0% Lake St. Louis South Ridge TDD where applicable. The city has no separate transient-guest tax.

Wentzville — No STR Ordinance; Fastest-Growing City in Missouri

Wentzville, Missouri has no short-term-rental-specific ordinance. A keyword review of the Wentzville Municipal Code returned no chapter, section, or ordinance referencing “short-term rental,” “transient guest,” “vacation rental,” or “Airbnb.”

Permit and Fee Structure

A Residential Occupancy Permit is required at every change of occupant. Per the city’s Occupancy Requirements page, the fee is $50.00 and valid for 90 days.

Adopted Codes

Wentzville adopted the 2021 International Building Code (IBC), 2021 International Residential Code (IRC), 2021 International Mechanical Code (IMC), 2021 International Property Maintenance Code (IPMC), 2021 International Fuel Gas Code (IFGC), and 2021 International Plumbing Code (IPC), effective April 24, 2024, along with the 2020 National Electrical Code with local amendments. STR life-safety obligations default to the IPMC for occupancy and the IRC for smoke and CO detector requirements.

Wentzville Sales Tax

The combined sales tax in Wentzville is 8.45% baseline: 4.225% state + 1.725% county + 2.5% city (City General 1.00% + City Capital 0.50% + City Transportation 0.50% + City Park 0.50%). Specific parcels within stacked CID and TDD overlay districts—Bear Creek CID, Crown Community CID, The Junction TDD, Wentzville Bend CID, Wentzville Bluffs CID, Wentzville Parkway Regional CID, and Wentzville TDD III—can push the combined rate as high as 10.45%. The city’s Tax Information page publishes the current overlay map.

Growth Context Matters

Per the U.S. Census Bureau Population Estimates released in May 2025, Wentzville’s July 1, 2025 population was 48,302, making it the 15th-largest city in Missouri. The city has grown more than fivefold since the 2000 Census, driven principally by the GM Wentzville Assembly plant and the Highway 70-West suburban corridor. For STR operators, the practical implication is that Wentzville leans heavily toward long-stay corporate housing demand (relocation, plant contractors, traveling professionals) rather than weekend leisure traffic. Operators considering Wentzville should underwrite to a 28-plus-night stay mix and consider mid-term rental positioning over pure short-term.

Consolidated Tax Stack

The table below summarizes the lodging-tax stack guests actually pay across all six jurisdictions. State and county components are the same everywhere; city-level components vary. Airbnb auto-collects the Missouri state sales tax, local sales taxes, and the 5% St. Charles County Sleeping Room Tax. Airbnb does NOT auto-collect city-specific transient-guest, hotel/motel, or tourism-license taxes—operators are responsible for those separately. Vrbo has no broad Missouri lodging-tax collection arrangement; Vrbo operators must remit state sales tax and all county/city taxes themselves (or use Avalara MyLodgeTax via Vrbo’s integration).

A note on the eight- and ten-bedroom thresholds: Both the City of St. Charles Chapter 620 hotel definition (more than 8 bedrooms) and the St. Peters §145.035 hotel definition (more than 10 sleeping rooms) appear to exclude typical residential STRs from city-level transient-guest taxes. Some compliance vendors apply these taxes to all listings regardless. The conservative path is to obtain a written classification determination from the relevant city Finance Department before either collecting or omitting these taxes—and to retain that determination in your records in case of audit.

Platform Tax Collection: Airbnb vs Vrbo in St. Charles County

The single most-common operator mistake we see in this metro is misunderstanding which platform collects what tax. Here’s the operational summary:

Airbnb auto-collects the following in St. Charles County listings under 31 nights:

• Missouri state sales tax (4.225%)
• Local sales taxes (city and county sales-tax components, per Airbnb help article 2312)
• The 5% St. Charles County Sleeping Room Tax

Airbnb does NOT auto-collect in St. Charles County listings:

• The City of St. Charles 1% Tourism License Tax or 0.75% Convention Center license tax
• The St. Peters §145.035 2% Transient Guest Tax (if applicable to the property under the >10 bedroom threshold)
• The O’Fallon 5% Transient Guest Tax
• Any city-specific business license fees

Vrbo does not have a broad Missouri lodging-tax collection arrangement. Vrbo operators have two practical options: (1) the host elects “Collect my taxes and send them to me,” where Vrbo collects from the guest at checkout and remits to the host who then files all taxes directly with state and local authorities; or (2) the host enables Avalara MyLodgeTax via Vrbo’s integration, in which case Avalara files on the host’s behalf. For Missouri, option 2 is generally less error-prone given the multi-layer tax stack.

Direct bookings (your own booking site, repeat-guest direct messages, etc.) require operator-collected and operator-remitted taxes across the entire stack—nothing is automatic on direct bookings.

HOA and Indenture Considerations

Beyond the city- and county-level regulatory frameworks, HOA and community-association restrictions are the most operationally consequential layer in this metro:

• Lake Saint Louis — LSLCA Indentures and sub-association CC&Rs are the highest-risk subdivision-level restriction in the metro. Pull governing documents from the St. Charles County Recorder of Deeds before purchase.
• St. Peters — Many newer subdivisions impose 6- or 12-month minimum-lease provisions in their indentures. These are functionally STR prohibitions unless amended.
• O’Fallon — Master-planned subdivisions like WingHaven, Dardenne Lakes, and The Manors carry CC&Rs with varying STR posture. Lease-term minimums are common.
• Wentzville — New-construction subdivisions almost universally have developer HOAs with active CC&Rs. Review the recorded indentures before listing.
• City of St. Charles — The older Historic District and Frenchtown areas (where new residential STRs are allowed within the 48-unit cap) have lower HOA density; outlying subdivisions vary.

The recurring pattern is that an HOA-imposed minimum-lease provision—often phrased as “no rentals shorter than X months” or “no transient occupancy”—overrides city zoning that would otherwise permit STR operation. The city does not adjudicate these disputes; they are private association matters enforced through indenture-based litigation.

Insurance Requirements

Missouri does not require minimum insurance for STR operators. Best practice across the metro includes:

• General liability of at least $1 million per occurrence, with explicit short-term rental coverage or endorsement.
• Property insurance covering the rental structure at full replacement value.
• Furnishings and equipment coverage at adequate replacement value.
• Confirmation in writing from your insurance carrier that the policy covers short-term rental operations. Standard homeowner’s policies typically exclude or severely limit STR coverage.

Airbnb’s Host Protection and Aircover programs and Vrbo’s Liability Insurance provide secondary coverage on platform bookings but do not replace primary host insurance, and they do not cover direct bookings or non-platform liability exposures.

Enforcement and Penalties

Enforcement posture varies sharply across the six jurisdictions:

• City of St. Charles — Active. The 48-unit cap is enforced; new applications are paused. Annual inspections are scheduled by city staff for permitted properties. Community Development reportedly identified roughly 100 unlicensed STRs operating prior to the moratorium framework, which informed the current cap.
• St. Charles County (unincorporated) — Historically low. County Council member Tim Baker described the county’s current posture to First Alert 4 as essentially toothless: “we tell them we had issues and it doesn’t go anywhere.” Bill 5490 is designed to change this.
• St. Peters, O’Fallon, Lake Saint Louis, Wentzville — No 2025–2026 publicly reported STR-specific enforcement actions. Complaint-driven enforcement remains the most likely vector, principally through neighbor calls about noise, parking, or guest behavior.

RSMo §479.353 caps municipal ordinance fines at $200 for the first violation, $275 for the second, $350 for the third, and $450 for the fourth and subsequent violations within any 12-month period. This statutory cap constrains every city’s STR enforcement schedule in Missouri.

Bill 5490’s proposed $500 fine and 30-day jail term for operating without a county STR license would push above the §479.353 first-violation cap unless structured as a separate offense category or stacked with court costs. The bill text as it moves through committee should be reviewed for this issue.

2025–2026 Regulatory Calendar

• April 15, 2025 — City of St. Charles amended its STR ordinance to cap residential STRs at 0.15% of housing units (48 units), restrict new residential STRs to the EHP district only.
• June 15, 2025 — City of St. Charles one-year moratorium (Ord. #24-085) ended.
• March 24, 2025 — Missouri Senate Local Government Committee held a public hearing on HB 1086 (STR property-tax classification). Bill died at session end.
• March 25, 2026 — Missouri Senate passed SB 1066 by 30–3 vote; now before House Special Committee on Tax Reform.
• April 20, 2026 — Senate Local Government, Elections and Pensions Committee passed HCS HBs 1768 & 2060.
• May 11, 2026 — Council member Tim Baker introduced Bill 5490 at St. Charles County Council.

St. Charles MO Metro STR Compliance Checklist

Use this checklist before listing any property in the metro:

Key Contact Information

Frequently Asked Questions

Q: Can I still open a new short-term rental in the City of St. Charles?

A: New residential STRs in the City of St. Charles are essentially closed to new applications—the 48-unit cap has been reached in the Extended Historic Preservation District. Commercial-zone properties within the EHP are still accepted. The only realistic path to a new residential operation today is acquiring a property with an existing approved STR permit; permits do not transfer automatically with property ownership, so the new owner must re-apply, which requires a permit slot to be available.

Q: Does the 5% St. Charles County Sleeping Room Tax apply to my Airbnb?

A: Yes—the county’s Convention and Sports Facilities Authority takes the position that the 5% applies to all transient lodging, including short-term rentals, under the broad reading of Mydler. The good news is that Airbnb auto-collects and remits this tax for you on bookings under 31 nights. You do not need to separately remit it for Airbnb-booked nights. Vrbo and direct bookings require your own remittance to CSFA.

Q: Do I need to collect the St. Peters 2% transient guest tax on a 3-bedroom Airbnb in St. Peters?

A: Probably not. Sec. 145.035 of the St. Peters City Code defines “hotel” as a lodging establishment with more than 10 sleeping rooms. A typical 3-bedroom STR is below that threshold and is not subject to the 2% transient-guest tax. Some tax-aggregator tools incorrectly recommend collecting it; the city’s own ordinance language is the authoritative source. Obtain a written determination from St. Peters Finance if you want clarity for your specific property.

Q: My property is in unincorporated St. Charles County. Will Bill 5490 affect me?

A: If Bill 5490 is adopted in substantially its introduced form, yes—you would need to obtain a county STR license, meet a 600-foot buffer requirement from any other licensed STR, comply with overnight occupancy and vehicle caps, designate a local contact reachable by police and code enforcement, and pass required inspections. The bill is currently introduced only as of mid-May 2026; monitor the St. Charles County Council agenda for committee action.

Q: I’m thinking about buying a vacation rental in Lake Saint Louis. What’s the catch?

A: The Lake Saint Louis Community Association Indentures and the indentures of any sub-association covering the property are the operative restriction—the city has no STR-specific ordinance, but the private association governance documents can prohibit transient occupancy outright or impose minimum-lease provisions that functionally ban STR operation. Request the LSLCA Indentures and Rules & Regulations directly from the Association before purchasing, and pull the recorded indentures for your specific subdivision from the St. Charles County Recorder of Deeds.

Q: Can an HOA prevent me from operating an STR even if city rules allow it?

A: Yes. HOA Indentures and CC&Rs are private contractual restrictions that operate independently of city zoning. If your subdivision’s Indentures prohibit short-term rentals—or impose a minimum-lease term of 6 or 12 months—you cannot legally operate a short-term rental regardless of city or county permission. HOA prohibitions override permissive zoning.

Q: How does Weekender Management help with St. Charles–area compliance?

A: We handle the full regulatory and tax compliance stack for our St. Charles properties, including permit applications, county lodging-tax registration, monthly tax remittance to CSFA and the relevant city, annual permit renewals, fire-safety inspection scheduling, and ongoing regulatory monitoring as the county’s Bill 5490 and any future suburb-level ordinances move through committee. Property owners benefit from our team’s hands-on experience with the multi-jurisdiction stack across the St. Louis metro.

Q: What about operating across multiple St. Charles County jurisdictions—how do the rules stack?

A: They stack literally—every property gets the Missouri state sales tax (4.225%), the St. Charles County 1.725% sales tax, the 5% county sleeping-room tax, and then the local jurisdiction’s specific obligations. The combined tax-stack table in this guide shows the typical burden by jurisdiction; the regulatory burden (permits, occupancy permits, business licenses) is similarly stacked. For multi-jurisdiction portfolios, centralized professional management is the practical answer—each jurisdiction has its own portal, its own renewal cadence, and its own enforcement posture.

Important Disclaimer

This guide reflects regulations as of May 2026 and is not a substitute for legal advice or official guidance from the City of St. Charles, the City of St. Peters, the City of O’Fallon, the City of Lake Saint Louis, the City of Wentzville, or the County of St. Charles. Specific provisions cited may have been amended between the date of this guide and your reading. Bill 5490 (St. Charles County) is proposed but not yet codified as of May 14, 2026—its provisions could change materially before adoption. The 48-unit residential STR cap in the City of St. Charles, the St. Peters §145.035 hotel-definition threshold of more than 10 sleeping rooms, and the City of St. Charles Chapter 620 hotel-definition threshold of more than 8 bedrooms are all current as of the date of this guide but should be verified directly with the relevant city Finance Department before relying on them for tax-collection decisions.

Before operating a short-term rental anywhere in the St. Charles MO metro:

1. Contact the relevant city Planning Department to verify your property’s zoning permits STR operation.
2. Verify the operative HOA Indentures and any sub-association CC&Rs for your specific subdivision via the St. Charles County Recorder of Deeds.
3. Confirm in writing with each city Finance Department which lodging taxes apply to your specific property.
4. Consult a Missouri-licensed tax professional regarding your complete tax liability across the state, county, and city stack.
5. Obtain appropriate liability insurance coverage explicitly covering short-term rental operations.

Regulations change regularly and enforcement priorities evolve. Your ongoing compliance is your responsibility.

Sources

Primary Municipal and County Code Sources

• City of St. Charles MO — Short-Term Rentals
• City of St. Charles MO — Tourism License Tax
• City of St. Charles MO Code — Chapter 620 (Hotels and Motels)
• St. Peters MO Code — Chapter 145 (Taxation)
• St. Peters MO Code — Chapter 605 (Business Licenses)
• O’Fallon MO Code — Chapter 525 (Residential Rental Inspection and Occupancy Requirements)
• Lake Saint Louis MO Municipal Code
• Wentzville MO Code (Municode)
• St. Charles County — Convention and Sports Facilities Authority
• St. Charles County — Lodging Regulations
• St. Charles County Council Agenda Center (Bill 5490)

Missouri Statutes

• RSMo §67.1158 — County sleeping-room tax authority
• RSMo §67.1003 — Municipal transient guest tax authority
• RSMo §479.353 — Municipal ordinance fine schedule
• Missouri Department of Revenue — Sales/Use Tax

Platform Tax Collection

• Airbnb — Missouri Occupancy Tax Collection (Article 2312)

News and Reporting

• First Alert 4 — St. Charles County Council proposes short-term rental regulations (May 11, 2026)
• Fox2Now — St. Charles County proposes new rules for short-term rentals (May 12, 2026)

Legal

• St. Charles County Convention & Sports Facilities Authority v. Mydler, 950 S.W.2d 668 (Mo. App. 1997)

Related Resources

If you’re operating short-term rentals elsewhere in Missouri, our Branson MO Short-Term Rental Regulations 2026 guide covers the regulatory landscape for the Branson tourism market—where the regulatory framework is far more developed than St. Charles County’s. For broader cross-market compliance context, see our comprehensive local rental regulations guide. Operators considering Northwest Arkansas should review our Bentonville Airbnb Regulations 2026 and the Northwest Arkansas short-term rental laws guide. To learn more about how we manage properties in this market, visit our St. Charles vacation rental management page.

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Last updated: May 14, 2026. For the most current information, contact the relevant city Planning, Finance, and Building departments listed above, or the St. Charles County Convention and Sports Facilities Authority at stcharlescountycsfamo.gov.

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