How to Pay Missouri State Income Tax
Where and how to send Missouri state income tax payments
Missouri accepts state income tax payments by mail, electronic transfer, or credit card. The method you choose affects when the state records your payment and whether you pay a processing fee. Most people who owe at tax time use one of three routes: mailing a check with Form MO-1040, paying online through the Missouri Department of Revenue website, or authorizing an electronic withdrawal from your bank account on tax day or earlier.
If you mail a payment, send it to the address printed on your tax form or listed on the Department of Revenue website — the address changes based on whether you are enclosing a check or a form. The postmark date counts as your payment date, so mail early enough that the envelope arrives before the deadline. If you pay electronically, the payment posts immediately, and you receive a confirmation number the same day.
The state does not charge a fee for ACH transfers (direct bank withdrawals) or for payments made through its official online portal. Credit card payments through third-party processors carry a convenience fee of roughly 2 to 3 percent, paid to the processor, not to Missouri. That fee is separate from any tax owed and is not deductible.
Key Takeaways
- Mail payments must include your tax form and be postmarked by the deadline; the postmark date is what counts, not the arrival date.
- Electronic payments through the Missouri Department of Revenue website or by ACH transfer are free and post the same day you submit them.
- Credit card payments through third-party processors charge a convenience fee of roughly 2 to 3 percent on top of your tax bill.
- If you cannot pay the full amount by the deadline, you can request a payment plan through the Department of Revenue, though interest and penalties will accrue on the unpaid balance.
Mailing a check or money order
To pay by mail, write a check or money order payable to the "Missouri Department of Revenue." Include your Social Security number or federal employer identification number on the check itself. Attach the check to your completed Form MO-1040 (the main state income tax return) or Form MO-1040-ES (the estimated tax form if you are making a quarterly payment).
The mailing address depends on your situation. Check the instructions that came with your tax form or visit the Missouri Department of Revenue website to confirm the correct address for your type of return. Using the wrong address delays processing. Mail your payment early enough that it arrives before the deadline — typically April 15 for annual returns, though the state extends this date some years. The postmark date on the envelope is your payment date, not the date the state receives it.
Keep a copy of your cancelled check or a photograph of the money order receipt for your records. If the state ever questions whether you paid, this proof shows when and how much you sent.
Paying online through the Missouri Department of Revenue
The Missouri Department of Revenue website accepts online payments through its official payment portal. You do not need to create an account. Enter your Social Security number, the amount owed, and your bank account information (routing number and account number). The system generates a confirmation number immediately after you submit the payment.
Online payments are processed as ACH transfers and are free. The payment posts to your account the same day, and you can pay up until 11:59 p.m. on the deadline date. Print or save your confirmation number — you will need it if you ever need to prove you paid on time. The state sends no separate receipt by mail, so your confirmation number and bank statement are your proof of payment.
If you are paying estimated taxes (quarterly payments), you can use the same portal. Select the tax year and the quarter you are paying for, and the system will route your payment correctly.
Setting up automatic withdrawal on tax day
You can authorize Missouri to withdraw your tax payment directly from your bank account on a date you choose. This method is free and removes the risk of missing the deadline. You provide your bank account and routing number, and the state pulls the money on the date you specify — which can be the deadline itself or any earlier date.
To set up automatic withdrawal, use the Missouri Department of Revenue website or include the payment information on your paper tax form when you mail it. If you mail the form with authorization, the state will process the withdrawal on the date you write on the form. If you set it up online, you can choose the withdrawal date during the submission process.
The withdrawal appears on your bank statement as a debit from the Missouri Department of Revenue. Keep your confirmation number and the date you authorized the withdrawal in case you need to verify the payment later.
Paying by credit or debit card
Missouri does not accept credit cards directly through its website. Instead, the state contracts with third-party payment processors that charge a convenience fee for this service. The fee is typically 2 to 3 percent of the amount you pay and is added to your total charge — you pay both the tax and the fee to the processor.
If you choose to pay by card, search the Missouri Department of Revenue website for the current list of approved processors. Each processor has its own website and fee structure, so compare the exact fee before you submit payment. The processor sends the tax payment to Missouri and gives you a confirmation number for your records.
Credit card payments are useful only if you are earning rewards points that exceed the fee cost, or if you need to delay the charge to your card for cash flow reasons. For most people, the free ACH or online payment option is the better choice.
What to do if you cannot pay the full amount by the deadline
If you owe but cannot pay by the deadline, file your return on time anyway and pay what you can. Missouri charges interest on unpaid balances — the rate varies by quarter and is set by the state — plus a failure-to-pay penalty of 0.5 percent per month on the unpaid amount. These charges accrue until you pay in full.
You can request a payment plan through the Missouri Department of Revenue. Short-term plans (up to 120 days) may not require a formal agreement. Longer plans require you to submit Form MO-1127 (Application for Extension of Time to Pay) or contact the Department of Revenue directly. The state will work with you to set up monthly payments, though interest and penalties continue to accrue on the unpaid balance.
If you cannot pay and do not request a plan, the state may place a lien on your property or garnish your wages. Filing on time and requesting a plan before the deadline gives you more options than waiting.
Tracking your payment and getting a receipt
If you paid online or by ACH, your confirmation number is your receipt. Write it down or save the email confirmation. Your bank statement will also show the debit to the Missouri Department of Revenue.
If you mailed a check, the cancelled check from your bank is your proof of payment. Keep it with your tax records for at least three years. If you need to verify that Missouri received your payment, you can contact the Department of Revenue with your confirmation number or the date and amount of your check.
Do not assume your payment was received just because you sent it. If you mailed a check close to the deadline and it does not appear on your bank statement within two weeks, contact your bank to confirm it cleared. If it cleared but the state says it did not receive it, provide your cancelled check as proof.
Frequently Asked Questions
What is the deadline to pay Missouri state income tax?
The deadline is typically April 15, the same as the federal deadline. Missouri sometimes extends this date by a few days or weeks if the 15th falls on a weekend or holiday. Check the Department of Revenue website or your tax form instructions for the exact date in your tax year.
Can I pay Missouri taxes with a credit card directly through the state website?
No. Missouri only accepts credit cards through third-party processors, which charge a convenience fee of roughly 2 to 3 percent. The state's official website offers free payment by ACH transfer or online bank payment, which is why most people use those methods instead.
What happens if I mail my payment but it arrives after the deadline?
The postmark date on your envelope is your payment date, not the arrival date. As long as your envelope is postmarked by the deadline, Missouri considers your payment on time, even if it arrives days or weeks later. Mail early to ensure the postmark is dated correctly.
Can I pay my Missouri state taxes through my employer's payroll system?
No. Payroll withholding is separate from paying taxes you owe at tax time. If you owe money when you file your return, you must pay it directly to the Missouri Department of Revenue using one of the methods described here. Adjust your withholding for future years if you consistently owe at tax time.
Do I need to include a copy of my tax form when I pay online?
No. Online payments do not require you to attach your form. The system asks for your Social Security number and the amount owed, which is enough to match your payment to your account. You still need to file your actual tax return separately — paying is not the same as filing.