In this article
- Quick facts: Filing for sales tax in Missouri
- When to file and pay Missouri sales tax
- Missouri sales tax filing deadlines
- How to prepare your Missouri sales tax return
- How to complete and file a Missouri sales tax return
- How to pay sales tax in Missouri
- What happens after filing and paying Missouri sales tax
- Late filing penalties and interest
- Getting third-party help with sales tax filing
- Sales tax filing in other states
If you're registered for Missouri sales tax, you must file returns and pay any tax due according to the filing frequency assigned by the Missouri Department of Revenue. This guide focuses on the filing and payment process most relevant to remote sellers and out-of-state businesses using MyTax Missouri. Missouri has extensive local taxes from cities, counties, and special districts that are reported on the same state return.
For broader information about Missouri sales tax rules, rates, and exemptions, see the Missouri Sales Tax Guide. For details on how to get a Missouri Retail Sales Tax License, see the Missouri Sales Tax Registration Guide.
Quick facts: Filing for sales tax in Missouri
Key information about filing Missouri sales tax returns, including filing frequency, deadlines, and payment options.
| Fact | Detail |
|---|---|
| Filing frequency | Monthly, quarterly, or annually |
| Filing deadline | The 20th day after the period ends |
| Filing portal | MyTax Missouri |
| Zero returns required | Yes |
When to file and pay Missouri sales tax
The Missouri Department of Revenue will assign you a filing frequency (monthly, quarterly, or annually) after you register your business.
Missouri sales tax returns and payments are due at the same time, by the 20th of the month following the end of the filing period. If the 20th falls on a weekend or holiday, the due date shifts to the next business day.
Missouri sales tax filing deadlines
Missouri monthly filing due dates
Reports are due on the 20th of the month following the reporting month.
| Month | Filing Deadline |
|---|---|
| January | February 20 |
| February | March 20 |
| March | April 20 |
| April | May 20 |
| May | June 20 |
| June | July 20 |
| July | August 20 |
| August | September 20 |
| September | October 20 |
| October | November 20 |
| November | December 20 |
| December | January 20 |
Missouri quarterly filing due dates
| Quarter | Filing Deadline |
|---|---|
| Q1 (January 1, March 31) | April 20 |
| Q2 (April 1, June 30) | July 20 |
| Q3 (July 1, September 30) | October 20 |
| Q4 (October 1, December 31) | January 20 |
Missouri annual filing due date
Reports for the previous calendar year are due on January 20.
Important note: Zero returns
Once you have a Missouri Retail Sales Tax License, you are required to file returns for every assigned period regardless of whether any sales tax was collected. When no sales tax was collected, you must file a zero return electronically through MyTax Missouri.
How to prepare your Missouri sales tax return
Before working on your sales tax return, collect all sales information for the tax period.
Sales transactions
You need to know your total gross sales to Missouri buyers and your taxable sales. Missouri taxes SaaS and digital goods generally, so include these in your taxable sales figures.
Key reporting figures
In addition to your gross Missouri sales, filing a return requires:
- Total sales and income
- Taxable sales by location (Missouri uses destination-based sourcing, and combined rates vary significantly by city, county, and special district)
- Non-taxable sales and exemptions
- Deductions and adjustments
- Total sales tax collected from customers during the filing period
How to complete and file a Missouri sales tax return
Missouri sales tax returns are filed electronically through MyTax Missouri and must be reported in US dollars.
Step-by-step: file a Missouri sales tax return
1. Collect all necessary information
Gather your sales records for the tax period, organized by buyer location. Missouri's extensive local tax structure means combined rates can vary significantly across the state. Apply the correct combined rate (state plus all applicable local taxes) for each buyer's city and county.
2. Log in and file online
- Log in to MyTax Missouri.
- Navigate to your Sales Tax account.
- Select the filing period you want to file.
- Enter your gross sales, taxable sales, exemptions, and total tax collected.
- Review and submit your return.
3. Receive confirmation
After submitting, you will receive a confirmation number. Save this as your record of filing.
How to pay sales tax in Missouri
Missouri requires most businesses to file and pay electronically through MyTax Missouri. You can pay directly within the portal after filing your return. Accepted payment methods include:
- Electronic funds transfer (EFT/ACH)
- Credit card (service fees may apply)
What happens after filing and paying Missouri sales tax
After filing and paying, keep a copy of your return and payment confirmation for your records.
- Save your filing confirmation and payment receipt
- Keep records supporting the reported amounts
- Continue filing according to your assigned frequency, remembering Missouri's 20th due date
- File a zero return when required
➡ Need help understanding Missouri sales tax rules, rates, and nexus? See the Missouri Sales Tax Guide
➡ Need to register for Missouri sales tax? See the Missouri Sales Tax Registration Guide
Late filing penalties and interest
If you miss a Missouri sales tax filing deadline, file as soon as possible. Failure to file returns and remit collected tax on time results in penalties and interest charges that increase the longer you wait.
For current penalty rates and interest charges, refer to the Missouri Department of Revenue website.
Getting third-party help with sales tax filing
Quaderno can simplify your Missouri sales tax compliance by generating detailed tax reports and handling the filing process on your behalf. Connect your sales data and Quaderno manages the submission to the Missouri Department of Revenue, ensuring timely and accurate filing.
Sales tax filing in other states
- Arizona Sales Tax Filing Guide
- California Sales Tax Filing Guide
- Florida Sales Tax Filing Guide
- Georgia Sales Tax Filing Guide
- Illinois Sales Tax Filing Guide
- Kentucky Sales Tax Filing Guide
- Massachusetts Sales Tax Filing Guide
- New Jersey Sales Tax Filing Guide
- New York Sales Tax Filing Guide
- Pennsylvania Sales Tax Filing Guide
- Rhode Island Sales Tax Filing Guide
- South Carolina Sales Tax Filing Guide
- Texas Sales Tax Filing Guide
- Virginia Sales Tax Filing Guide
- Washington DC Sales Tax Filing Guide
Need help filing across multiple states?
Watch our webinar: US Sales Tax Registration & Filing Tips + AMA. Learn how international sellers register, file, and manage US sales tax compliance across multiple jurisdictions.
Note: At Quaderno we love providing helpful information and best practices about taxes, but we are not certified tax advisors. For further help, or if you are ever in doubt, please consult a professional tax advisor or the tax authorities.
