St. Louis County Property Assessor 2026: Search & Tax

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St. Louis County Missouri • Personal Property & Tax Guide

Search St. Louis County Personal Property, Vehicle Assessments and Tax Records

St. Louis County Assessor Jake Zimmerman oversees the county assessment system used for both real estate and tangible personal property. For vehicle owners, the most important records are different from a house search: your personal-property account identifies the cars, trucks, motorcycles, boats, trailers and other taxable property associated with you for the January 1 assessment date.

This guide explains how to find an individual personal-property account, declare vehicles, obtain a tax waiver, understand the 33⅓% assessment calculation, check the 2026 appeal status, find the Collector’s tax balance and receipt, fix a sold-vehicle or moved-out-of-county issue, and keep St. Louis County records separate from the independent City of St. Louis.

Find individual personal-property account
Declare cars, boats, trailers and equipment
Get tax waiver / non-assessment help
Search tax balance and print receipt
Personal Property Search Property Taxes County Assessor Recorder of Deeds
County Assessor Jake Zimmerman
Assessor Phone 314-615-2555
Assessment Date January 1
Most Personal Property 33⅓%
Reviewed August 12, 2026
2026 status check

St. Louis County’s Regular 2026 Personal-Property Appeal Period Has Ended

July 13, 2026 was the normal Board of Equalization filing deadline. St. Louis County accepted real-estate and personal-property appeals from May 1 through the second Monday in July. The regular 2026 appeal window is therefore closed as of August.
2026 declaration The county’s ordinary personal-property declaration deadline has passed. If you did not file, contact the Assessor now rather than waiting for a tax bill.
Vehicle list wrong? Report sold, traded, moved or incorrectly listed property to the Assessor. The Collector cannot change the underlying assessment record.
Tax bill next Personal-property bills are generated later in the year from the Assessor’s certified assessment and can be searched through the Collector’s tax portal.
Do not wait until vehicle-license renewal to discover an assessment problem. Missouri licensing often requires proof of paid personal-property taxes or a Statement of Non-Assessment. Correcting an account can take longer when the issue involves a prior tax year.
Critical jurisdiction check

St. Louis County and the City of St. Louis Are Separate Property-Tax Jurisdictions

The City of St. Louis is not inside St. Louis County for property-assessment purposes. It operates its own Assessor and Collector systems.

St. Louis County Clayton, Florissant, Chesterfield, Ballwin, Kirkwood, Webster Groves, Maryland Heights and other county communities use the St. Louis County Assessor when the property is within the county’s assessment jurisdiction.
City of St. Louis A taxpayer whose January 1 taxable situs is inside the independent City of St. Louis uses the City Assessor’s separate personal-property system.
Why this matters: the declaration deadlines, account numbers, office addresses and online portals are not interchangeable. Always confirm whether your January 1 address was in St. Louis County or the City of St. Louis.
Use the correct office

Assessor vs Collector vs Recorder vs Board of Equalization

County Assessor

  • Personal-property account
  • Vehicle declaration
  • Market value
  • Assessment
  • Sold vehicle correction
  • Address changes
  • Tax waiver
  • Business personal property
  • Real-estate valuation

Collector of Revenue

  • Current tax bill
  • Paid / unpaid status
  • Online payment
  • Tax receipt
  • Delinquent balance
  • Payment application
  • Personal-property lawsuits

Recorder of Deeds

  • Real-estate deeds
  • Deeds of trust
  • Releases
  • Recorded liens
  • Subdivision plats
  • Document copies
  • Certified deed copies

Board of Equalization

  • Personal-property value appeals
  • Real-estate appeals
  • Classification disputes
  • Supporting evidence
  • Formal county review
What belongs on a declaration?

Examples of Taxable Personal Property in St. Louis County

Motor Vehicles Cars, trucks, motorcycles and other taxable motor vehicles.
Boats & Motors Watercraft and taxable boat motors.
Trailers / Mobile Property Trailers, certain mobile homes and similar tangible property.
Aircraft Aircraft can be taxable personal property and may use special assessment rules.
Farm Property Livestock, farm machinery and equipment can be taxable but use different assessment percentages.
Business Equipment Computers, office furniture, fixtures, machinery, tools and equipment used in business.
Company Vehicles Vehicles titled to a business or organization are generally handled through business personal property.
Inventory Inventory held for resale is generally treated differently from taxable business equipment and supplies.
The most important Missouri rule

January 1 Determines Personal-Property Tax Liability

Missouri uses January 1 as the personal-property tax date. This rule explains many of the most common questions about cars sold or purchased during the year.

Owned on January 1 If you owned a taxable vehicle on January 1 and sold it later, you generally remain liable for that year’s personal-property tax.
Bought After January 1 If you did not own the vehicle on January 1 and bought it later in the year, it generally is not part of that year’s January 1 assessment.
No Ordinary Proration Missouri generally does not prorate an annual personal-property tax simply because a vehicle was sold, traded or moved during the year.
Example: if you owned Vehicle A on January 1, 2026 and traded it for Vehicle B in June, the 2026 assessment is normally based on the January 1 property. Vehicle B becomes relevant to the following January 1 declaration if you still own it then.
Most cars, boats and ordinary personal property

How St. Louis County Calculates Personal-Property Assessed Value

1. January 1 Property Assessor identifies taxable property owned or held on January 1.
Vehicle, boat, trailer, equipment, etc.
2. Market Value Assessor determines true value in money under Missouri valuation rules.
Vehicle valuation uses the statutory recommended guide.
3. Assessment Ratio Most cars, boats and ordinary tangible personal property use 33⅓%.
$15,000 market value → about $5,000 assessed value.
4. Tax Levy Applicable local levy rates are applied to assessed value.
Collector bills the resulting tax.
Not every type uses 33⅓%. Missouri currently lists different ratios for certain categories such as historic vehicles, livestock, farm machinery and grain.
Why a car’s tax value can differ from a private-sale estimate

How Missouri Values Vehicles for Personal-Property Tax

Missouri law directs county assessors to use the trade-in value published in the October edition of the designated automotive valuation guide or its successor as the recommended source for vehicles listed in that publication.

Tax Date The vehicle is being valued for the January 1 assessment date.
Trade-In Standard Tax value is not necessarily the same number you see in a dealer advertisement or retail listing.
Not Listed? If the particular vehicle is not in the standard guide, the Assessor can use other information that reasonably estimates market value.
Mileage, condition or unusual equipment does not automatically change the Assessor’s value merely because a different number appears on an online consumer pricing site. If the assessment is materially wrong, gather evidence and use the applicable appeal or correction process.
Annual personal-property filing

How to File a St. Louis County Personal-Property Declaration

St. Louis County mails declarations to owners with active individual, business or manufacturer personal-property accounts. Existing account holders can use the county’s filing options to report what they owned on January 1.

Locate the declaration. Use the form mailed by the Assessor or access the county’s online personal-property filing option.
Confirm taxpayer details. Review name, account number, mailing address and residency information.
Review each listed vehicle. Make sure year, make/model and ownership status are accurate.
Remove property no longer owned before January 1. Be prepared to provide sale, trade or transfer documentation if requested.
Add taxable property owned January 1. Include vehicles or other taxable property missing from the preprinted list.
File through the current county method. Existing taxpayers may be able to file online; county guidance also allows filing by mail or in person.
Keep confirmation. Save electronic confirmation, stamped copy or mailing evidence.
2026 regular deadline passed. St. Louis County’s personal-property declarations are due early in the year. If yours was not filed, contact the Assessor promptly because late filing can affect assessment processing and may trigger statutory penalties.
Statement of Non-Assessment

How to Get a St. Louis County Personal-Property Tax Waiver

A Statement of Non-Assessment—commonly called a tax waiver—shows that you did not owe St. Louis County personal-property tax for the applicable year. It is commonly needed when registering a vehicle and no paid county personal-property receipt exists.

Situation Typical proof listed by county What to do
New Missouri Resident Vehicle title, current out-of-state registration or Missouri title receipt. Show that you were not taxable in St. Louis County for the required January 1.
First-Time Vehicle Owner Vehicle title, Missouri title application or signed bill of sale. Documentation should show acquisition date.
Leased Vehicle Lease agreement or qualifying registration documentation. Ask the Assessor which party was taxable for the required year.
Active-Duty Military Military documentation when home of record is outside Missouri. Follow Missouri licensing and exemption instructions.
If you lived elsewhere in Missouri on January 1, the waiver generally comes from the county where you lived on that tax date—not automatically from St. Louis County.
Start With St. Louis County Personal Property Open the official county page and select the Statement of Non-Assessment / Tax Waiver option. Review the current documentation list before starting an online, virtual or office request.
Sold, traded, totaled or moved?

Why a Sold Vehicle Can Still Appear on Your St. Louis County Tax Bill

Sold After January 1 The vehicle usually remains part of the current tax year’s assessment because you owned it on January 1.
Sold Before January 1 Contact the Assessor if the vehicle is incorrectly included. Keep bill of sale, trade documentation or title records.
Moved After January 1 Moving out after January 1 generally does not erase the current year’s St. Louis County personal-property liability.
The Collector cannot simply remove a vehicle from your bill. Vehicle ownership and assessment corrections are Assessor functions. The Collector bills what is certified on the tax roll.
Leaving St. Louis County

How to Close an Individual Personal-Property Account

St. Louis County explains that an account can be closed when a taxpayer leaves the county or no longer owns taxable personal property, but the January 1 rule still applies.

Determine your move/disposal date. January 1 determines whether the current year’s liability normally remains.
Gather documentation. You may need proof of move, out-of-state registration, tax paid to another Missouri county or disposal of the vehicle.
Submit the account-close request to the Assessor. Use the current Personal Property service options.
Register with the new Missouri county when applicable. If you remain a Missouri resident, contact the assessor where you now live.
Verify old taxes separately. Closing an assessment account does not automatically erase valid prior-year taxes.
Business personal property

St. Louis County Business Equipment and Company Vehicles

Businesses must report taxable tangible personal property used in a trade, profession, business or income-producing activity.

  • Office furniture
  • Computer equipment
  • Computer peripherals
  • Fixtures
  • Tools
  • Construction equipment
  • Machinery
  • Company-titled vehicles
  • Long-lived business assets
  • Other taxable tangible equipment
Missouri uses statutory depreciation methodology for many classes of depreciable tangible business personal property. The original cost, acquisition year, class life and recovery period can all matter.
Do not copy the fixed-asset ledger blindly. Review retired/disposed assets, exempt property, inventory held for resale and property located outside the county before submitting a business declaration.
2026 deadline: July 13

St. Louis County Personal-Property Assessment Appeals

Missouri allows taxpayers to challenge the Assessor’s opinion of value and/or classification through the St. Louis County Board of Equalization.

Find the personal-property account number. Individual accounts begin with I and appear on the declaration, prior tax bill or county search.
Identify exactly what is disputed. Examples include vehicle value, wrong property, incorrect classification or business equipment value.
Gather supporting evidence. Vehicle documentation, condition evidence, appraisal materials or asset records should support your requested value.
File during the annual BOE window. For 2026, St. Louis County accepted appeals from May 1 through July 13.
Upload evidence with the appeal when possible. The county strongly encourages supporting evidence at filing.
Keep your confirmation and hearing information. Multiple properties filed on different dates may result in separate hearings.
August 2026 status: July 13 has passed. If the problem is not simply disagreement with value but an actual ownership, situs or listing error, contact the Assessor to determine whether a correction process remains available.
“My St. Louis County personal-property account is I__________. The 2026 account lists __________ with a value of $__________. I believe the record is incorrect because __________. The normal July 13 BOE deadline has passed. Please tell me whether this is an assessment-value dispute or an administrative correction and what documentation you need.”
Vehicle registration proof

Paid Receipt vs Tax Waiver: Which One Do You Need?

Paid Personal-Property Receipt Use this when you were assessed and paid the required personal-property tax. Search the Collector’s account and print the paid record.
Statement of Non-Assessment Use this when you were not liable for St. Louis County personal-property tax for the applicable year and therefore do not have a paid receipt.
Do not request a waiver simply because you have not paid a valid tax bill. A Statement of Non-Assessment shows that no tax was due; it is not a substitute for paying an assessment that was legally owed.
If your search is actually for a house or land

St. Louis County Real Estate Uses a Different Property Record

The keyword “St. Louis County Assessor” can mean either real estate or personal property. A house, condo, commercial building or parcel is a real-estate assessment, not an individual personal-property account.

Residential Real Estate Missouri residential real property is generally assessed at 19% of true value in money.
Commercial Real Estate Commercial/industrial real property generally uses the statutory 32% assessment ratio.
Agricultural / Horticultural Qualifying agricultural/horticultural real property generally uses a 12% assessment ratio based on applicable productive or market-value rules.
Missouri normally reassesses real property in odd-numbered years. Therefore 2026 is ordinarily the second year of the 2025 real-estate reassessment cycle unless new construction, improvements or another statutory change affects the property.
For houses and land—not vehicle ownership

St. Louis County Recorder of Deeds Property Records

The Recorder of Deeds records written instruments affecting real estate or personal property, subdivision plats, federal and state tax liens and other recordable documents. Recorded documents are available for public research.

Recorder Phone 314-615-7100
Email Recorder@stlouiscountymo.gov
Office 41 South Central Avenue
Clayton, MO 63105
Deed copies recorded after 1974 are broadly available through the county’s current services. Older deed research or searches with unknown addresses/dates can require an appointment.
Deed-copy service Current published amount Note
First Page $2 For deed copy.
Each Additional Page $1 Added to copy cost.
Certification Additional $1 When certified copy is required.

St. Louis County Personal-Property Problems and Fixes

Problem Best next step Office
Cannot find personal-property account Check prior declaration or tax bill; individual account should start with I. Assessor / Collector
Vehicle sold after January 1 still appears Current-year tax can still be valid because January 1 controls liability. Assessor
Vehicle sold before January 1 appears Submit proof of sale/trade or title transfer for correction. Assessor
Bought car after January 1 Do not assume it belongs on the current-year assessment; verify with Assessor. Assessor
Need DMV proof but no tax bill exists Determine whether you qualify for a Statement of Non-Assessment. Assessor
Need paid tax receipt Search Collector Property Tax Inquiry and print paid account. Collector
Vehicle market value seems too high Review statutory valuation method; 2026 ordinary BOE deadline was July 13. Assessor / BOE
Moved to another Missouri county Close/update St. Louis County account and register with new county assessor as appropriate. Assessor
Moved from City of St. Louis Remember city and county are separate assessment jurisdictions. Correct Assessor
Business equipment list is wrong Reconcile fixed assets, disposals and situs and contact Business Personal Property. Assessor
Tax bill amount wrong because vehicle is wrong Correct assessment with Assessor; Collector cannot change vehicle listing. Assessor
Need deed for senior real-estate program Request deed copy from Recorder; post-1974 documents are easier to retrieve. Recorder
Clayton County Administration Building

St. Louis County Assessor and Property Offices

County Assessor Jake Zimmerman
41 South Central Avenue
3rd Floor
Clayton, MO 63105
314-615-2555
Assessor@stlouiscountymo.gov
In person: Monday-Friday
8:00 a.m.-3:30 p.m.
Phone: 8:30 a.m.-4:30 p.m.
Collector of Revenue 41 South Central Avenue
Clayton, MO 63105
Use the official tax inquiry for current personal-property and real-estate tax balances, payments and receipts.
Recorder of Deeds 41 South Central Avenue
Clayton, MO 63105
314-615-7100
Recorder@stlouiscountymo.gov
Bring the account number. For personal property, an individual account beginning with I can save substantial time when moving between Assessor and Collector services.
Official St. Louis County routes

Personal Property & Tax Action Center

Personal Property Declaration, account help, waiver and assessment services. Tax Search Search personal-property or real-estate tax and print receipt. Assessment Appeals Review BOE process and annual appeal information. Recorder Deeds, recordings, liens, plats and document copies.
10 St. Louis County answers

St. Louis County Assessor Personal Property FAQs

1. How do I search St. Louis County personal property?

Start with the St. Louis County Assessor’s Personal Property services and your individual account number. Individual personal-property accounts begin with the letter I followed by numbers. You can then use the Collector’s Property Tax Inquiry system to search the related tax bill, payment status and receipt.

2. Who is the St. Louis County Assessor in 2026?

Jake Zimmerman is serving as St. Louis County Assessor during 2026. The Assessor’s main office is at 41 South Central Avenue, 3rd Floor, Clayton, Missouri 63105, and the main telephone number is 314-615-2555.

3. Is St. Louis County the same tax jurisdiction as the City of St. Louis?

No. St. Louis County and the independent City of St. Louis are separate assessment jurisdictions. Use the Assessor for the jurisdiction where the taxable property was located on the applicable January 1 tax date.

4. What date determines St. Louis County personal-property tax liability?

January 1 is the Missouri personal-property assessment date. In general, property owned on January 1 is taxable for that calendar year, even when a vehicle is sold or the owner moves later in the year.

5. What percentage is used to assess a car in St. Louis County?

Most automobiles, boats and ordinary tangible personal property are assessed at 33⅓% of true value in money under Missouri law. Other categories such as historic vehicles, livestock and farm equipment can use different statutory ratios.

6. Why am I taxed on a car I sold during 2026?

If you owned the vehicle on January 1, 2026, Missouri generally keeps it in your 2026 personal-property assessment even if you sold or traded it later. Personal-property tax is not ordinarily prorated for a midyear sale.

7. What was the St. Louis County 2026 personal-property appeal deadline?

St. Louis County accepted Board of Equalization appeals from May 1 through the second Monday in July. In 2026 that deadline was July 13. The ordinary annual appeal period has therefore ended.

8. How do I get a St. Louis County personal-property tax waiver?

Request a Statement of Non-Assessment from the County Assessor when you were not liable for St. Louis County personal-property tax for the required year. Depending on the situation, documentation can include a title, bill of sale, Missouri title application, out-of-state registration or lease agreement.

9. Where do I print my St. Louis County personal-property tax receipt?

Use the St. Louis County Property Tax Inquiry system. Search the personal-property account, select the applicable paid tax year and use the available receipt or print option. Individual accounts begin with I.

10. Can the Collector remove a vehicle from my personal-property bill?

The underlying vehicle listing and assessment are Assessor responsibilities. If the vehicle, ownership date, address or account record is wrong, contact the County Assessor. The Collector handles billing, payment and receipt information from the certified assessment roll.

Official Sources and Editorial Verification

St. Louis County Assessor Assessment office, contact details and property-assessment services. Personal Property Individual/business personal-property assessment, declaration and waiver services. Property Tax Inquiry Personal-property and real-estate tax search, balance and receipt information. Board of Equalization Property assessment appeals and filing information. Recorder of Deeds Deeds, recordings, plats, liens and deed-copy services. Missouri State Tax Commission January 1 tax date, assessment ratios, vehicle valuation and personal-property rules.
Verified for this guide: current 2026 Assessor Jake Zimmerman; Assessor office at 41 South Central Avenue in Clayton; 314-615-2555 contact number; annual county personal-property assessment responsibility; January 1 assessment date; individual accounts beginning with I; most vehicles and ordinary personal property assessed at 33⅓%; Missouri vehicle-value methodology; county personal-property waiver documentation; January 1 sold-vehicle rule; 2026 Board of Equalization deadline of July 13; current property-tax inquiry portal; Recorder office and deed-copy costs; and the legal distinction between St. Louis County and the independent City of St. Louis.

CountyPropertyAppraiser.org is an independent informational website. It is not affiliated with St. Louis County, the St. Louis County Assessor, Collector of Revenue, Board of Equalization, Recorder of Deeds, Missouri State Tax Commission or any government agency.

Personal-property ownership, declaration procedures, valuation guides, appeal deadlines, account information, taxes, penalties, payment options, officeholders, deed-copy fees and online systems can change. Verify time-sensitive information with the responsible official office before declaring property, appealing an assessment, registering a vehicle, requesting a tax waiver, paying a delinquent bill or relying on a property record for legal or financial purposes.

Editorial verification date: August 12, 2026.

Slug: st-louis-county-assessor-personal-property

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Value term Simple meaning
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