How to Pay Your St. Louis County Personal Property Tax
Where and how to pay your St. Louis County personal property tax
St. Louis County personal property tax is paid directly to the St. Louis County Assessor's Office or through the St. Louis County Collector's Office, depending on which office handles your bill. Most taxpayers receive a bill in the mail and can pay by check, money order, online through the county's payment portal, or in person at the collector's office. The bill itself will tell you which office to send payment to and what account number to include.
If you have not received a bill but believe you owe personal property tax—for example, because you own business equipment, a vehicle not registered with the state, or rental property furnishings—contact the Assessor's Office to confirm whether your property is on the tax roll. The Assessor's Office assesses what you own; the Collector's Office collects what you owe.
Payment deadlines in St. Louis County typically fall in December for the prior year's tax, though the exact date appears on your bill. Paying after the deadline triggers a penalty and interest charges that compound monthly, so marking the date on your calendar when you receive the bill prevents costly delays.
Key Takeaways
- Personal property tax bills come from the St. Louis County Collector's Office, and the bill itself shows where to send payment and your account number.
- You can pay by check, money order, online through the county portal, or in person at the collector's office during business hours.
- Payments made after the deadline shown on your bill incur a penalty and monthly interest charges that grow over time.
- If you do not receive a bill but own taxable personal property, contact the Assessor's Office to verify whether your property is registered on the tax roll.
Online payment through the St. Louis County portal
The St. Louis County Collector's Office operates an online payment system where you can pay your personal property tax using a debit or credit card. To use this system, you will need your bill or account number, which appears at the top of your tax bill. The online portal is accessible from the Collector's Office website.
Online payments are processed immediately, and you will receive a confirmation number on screen and via email. Keep this confirmation number for your records. The Collector's Office typically posts online payments to your account within one business day, though the card processor may charge a convenience fee on top of your tax amount—this fee is set by the payment processor, not the county.
If you pay online close to the deadline, verify that your payment posts before the due date. A payment initiated online counts as received on the date it is processed by the county system, not the date you submit it, so paying several days early reduces the risk of a late penalty.
Mailing a check or money order
To pay by mail, write a check or money order payable to the St. Louis County Collector and include your account number on the front of the check. Mail it to the address shown on your bill—this address may vary depending on which collector's district handles your property. Include your bill with the payment so the office can match it to your account quickly.
The postmark date does not count as your payment date; the county records the date the payment arrives at the office. Mail sent close to the deadline often arrives after the due date, triggering a penalty. If you must pay by mail and the deadline is near, consider paying online or in person instead.
Keep a copy of your cancelled check or a photo of your money order receipt for your records. If a payment goes missing in the mail, you will need proof that you sent it to dispute a late penalty with the Collector's Office.
In-person payment at the Collector's Office
You can walk into the St. Louis County Collector's Office during business hours and pay your personal property tax with cash, check, or money order. Bring your bill or account number and a form of identification. The office will provide a receipt immediately, and your payment is recorded on the spot.
The Collector's Office location and hours are listed on your bill and on the county website. If you live far from the main office, check whether a satellite location or payment drop box is available in your district. Paying in person eliminates mail delays and gives you instant proof of payment.
What happens if you miss the deadline
A payment received after the due date shown on your bill incurs a penalty and interest. The penalty is typically a percentage of the tax owed, and interest accrues monthly on the unpaid balance. Both the penalty and interest are added to your total debt, so the longer you wait, the more you owe.
If your bill shows a deadline of December 31 and you pay on January 15, the penalty and interest charges are calculated from January 1 onward. The county does not waive these charges for late payment, even if you were unaware of the deadline or did not receive your bill.
If you cannot pay by the deadline, contact the Collector's Office before the due date to discuss options. Some counties offer payment plans for large amounts, though St. Louis County's policies on this vary. Calling ahead is better than ignoring the bill, because the debt will not disappear and will only grow.
If you did not receive a bill
If you own personal property subject to tax in St. Louis County but have not received a bill, contact the St. Louis County Assessor's Office to confirm that your property is on the tax roll. The Assessor's Office maintains the list of taxable property; if your property is not listed, you will not receive a bill and will not owe tax.
If your property should be on the roll but is not, the Assessor's Office can add it and issue a bill for the current year. If you moved and the bill went to an old address, update your address with the Collector's Office so future bills reach you. Provide your account number and new mailing address in writing or by phone.
Do not assume that no bill means no tax is owed. If you own taxable personal property and receive no bill, the debt may still accumulate with penalties and interest. Reaching out to the county proactively protects you from a surprise bill months or years later.
Understanding what counts as personal property tax in St. Louis County
St. Louis County personal property tax applies to tangible items you own for business or rental purposes, such as machinery, equipment, furniture, vehicles not registered with the state, and inventory. It does not apply to your primary residence or your personal vehicle registered with the Missouri Department of Revenue.
If you own a rental property, the furnishings and appliances in that property may be taxed as personal property separate from the real estate tax on the building itself. If you run a business from a location you rent, your business equipment and fixtures are typically subject to personal property tax. The Assessor's Office determines what is taxable based on what you report and what they observe during assessments.
If you believe an item has been incorrectly assessed or should not be taxed, you can file a protest with the Assessor's Office. The protest must be filed by a deadline set each year, usually in the spring. Contact the Assessor's Office for the current protest deadline and the forms required.
Frequently Asked Questions
Can I set up automatic payments for my personal property tax?
St. Louis County does not currently offer automatic recurring payments through the Collector's Office. You must initiate each payment manually through the online portal, by mail, or in person. If you want a reminder, mark your bill's due date on your calendar or set a phone reminder when you receive the bill.
What if I pay online but the payment does not show up on my account?
Online payments typically post within one business day. If more than two business days have passed and your payment does not appear, contact the Collector's Office with your confirmation number. The office can verify whether the payment was received and when it was posted to your account.
Do I have to pay the entire amount at once, or can I pay in installments?
St. Louis County policy on payment plans varies. Contact the Collector's Office before your deadline to ask whether a payment plan is available for your situation. Do not wait until after the deadline to ask, because penalties and interest will have already been added.
What if I disagree with the amount on my bill?
Contact the Assessor's Office to request a review of your assessment. You can also file a formal protest by the deadline shown in the Assessor's Office materials. Paying the bill does not waive your right to protest; you can pay and protest at the same time if you want to avoid penalties while your dispute is being reviewed.
Can someone else pay my tax bill on my behalf?
Yes. Anyone can pay your bill if they have your account number and the bill amount. They can pay online, by mail, or in person. The payment will be credited to your account regardless of who submits it. Provide the person paying with your account number and the due date so they can ensure timely payment.