Minnesota sales tax due dates fall on the 20th of the month following each reporting period, with annual returns due February 5 instead. Which of those dates applies to you depends on your filing frequency, which the Department of Revenue assigns based on your average tax liability. Missing a due date triggers a 5% late payment penalty that grows in 5% increments every 30 days up to 15%, plus a separate 5% late filing penalty and daily interest on the unpaid balance.
How Your Filing Frequency Is Set
Every business with a Minnesota sales tax permit starts on a monthly schedule. A less frequent schedule is not automatic; you have to request it and show a compliance history first.
Under Minnesota Statutes 289A.18, subdivision 4, there are three tiers:
- Monthly is the default. Returns are due the 20th of the following month.
- Quarterly filing is available if your average sales and use tax liability (including local taxes administered by the Department) is $500 or less per month in any calendar quarter and you’ve substantially complied with Minnesota tax laws for the preceding four quarters. The authorization holds as long as quarterly liability stays below $1,500.
- Annual filing is available if your average liability is $100 or less per month during a calendar year and you’ve been compliant during that period. The authorization holds as long as annual liability stays under $1,200.
The commissioner can also grant quarterly or annual authorization proactively when projected liability falls inside those thresholds.1Minnesota Office of the Revisor of Statutes. Minnesota Code 289A.18 – Filing Requirements for Sales and Use Tax Returns One easy thing to miss: the liability thresholds count local sales taxes administered by the Department, not just the state portion.
2026 Due Date Calendar
The Department of Revenue publishes exact due dates each year, accounting for weekends and holidays. For 2026:
- January 2026 return: February 20, 2026
- February 2026 return: March 20, 2026
- March 2026 return (monthly and Q1 quarterly): April 20, 2026
- April 2026 return: May 20, 2026
- May 2026 return: June 22, 2026
- June 2026 return (monthly and Q2 quarterly): July 20, 2026
- July 2026 return: August 20, 2026
- August 2026 return: September 21, 2026
- September 2026 return (monthly and Q3 quarterly): October 20, 2026
- October 2026 return: November 20, 2026
- November 2026 return: December 21, 2026
- December 2026 return (monthly and Q4 quarterly): January 20, 2027
- Annual return for calendar year 2026: February 5, 2027
Two months, May and August, have shifted deadlines (June 22 and September 21) because the normal 20th falls on a weekend.2Minnesota Department of Revenue. Sales Tax Return Filing Due Dates Quarterly filers only track four dates: April 20, July 20, October 20, and January 20.
Weekend and Holiday Shifts
When a due date lands on a Saturday, Sunday, or a state-recognized legal holiday, your return and payment are timely if filed or postmarked by the next business day.3Minnesota Office of the Revisor of Statutes. Minnesota Code 270C.39 – Due Date on Saturday, Sunday, or Holiday That’s why the 2026 calendar moves the May return from June 20 (a Saturday) to June 22, and the August return from September 20 (a Sunday) to September 21.
Filing electronically through e-Services timestamps your submission, so a submission at 11:55 PM on the deadline counts. Paper filing is limited to filers with an approved religious accommodation, and in that case the check must be postmarked at least two business days before the due date to be considered timely.
Penalties for a Late Return
Minnesota treats collected sales tax as trust fund money you’re holding for the state, and the penalty structure reflects that.
The late payment penalty is 5% of the unpaid tax if you’re no more than 30 days late. For each additional 30-day period (or any fraction of one), another 5% is added, up to a maximum of 15%.4Minnesota Office of the Revisor of Statutes. Minnesota Code 289A.60 – Civil Penalties A return that’s 45 days late is already at 10%. Anything past 60 days hits the 15% cap.
A separate late filing penalty of 5% of the tax not paid by the due date applies as well.5Minnesota Department of Revenue. Penalties and Interest for Businesses Filing late and paying late are penalized independently, and the penalties stack.
If the Department identifies a pattern of repeated late filings or late payments and sends written notice, the penalty jumps to 25% of the unpaid tax for each subsequent failure.4Minnesota Office of the Revisor of Statutes. Minnesota Code 289A.60 – Civil Penalties That notice is the last warning before the math gets much worse.
Interest on the Unpaid Balance
Interest runs on top of penalties. For 2026, the annual interest rate is 7%.6Minnesota Department of Revenue. Calculating Penalty and Interest It accrues daily, calculated by multiplying the outstanding balance (including penalties) by the daily rate (7% divided by 365). The commissioner sets the rate each October based on the average prime rate charged by banks during the preceding six months, and the new rate takes effect the following January 1.7Minnesota Office of the Revisor of Statutes. Minnesota Code 270C.40 – Interest on Overpayments and Underpayments
Filing on Time Through e-Services
Minnesota requires sales and use tax returns to be filed electronically through the Department of Revenue’s e-Services portal.8Minnesota Department of Revenue. Filing Returns and Recordkeeping There is no paper option except for filers with an approved religious accommodation.
Inside e-Services you enter gross sales, subtract exempt amounts, and the system calculates tax owed at the applicable state and local rates. After you submit, save the confirmation number as proof of timely filing.
Payment happens at the same time, usually through an ACH debit from your business bank account. Credit and debit card payments are accepted but carry processing fees from the card servicer. Businesses with $10,000 or more in annual sales tax liability are required to remit electronically. Once payment clears, the portal generates a downloadable receipt and sends a confirmation email. Keep both.
If You Missed a Period or Filed With an Error
If you filed a return with the wrong numbers, you can amend it directly in e-Services by selecting “Change a Return.” Enter the corrected total taxable sales (not just the difference), along with your name, phone number, and the reason for the change.9Minnesota Department of Revenue. Amending a Sales Tax Return Form ST11-MPA (Multiple Period Amended Return) lets you correct several periods in one submission.
The deadline to amend is 3.5 years from the date the original return was due.9Minnesota Department of Revenue. Amending a Sales Tax Return After that, refund claims for overpayments are gone. Underpayments can still be collected by the state beyond that window in some circumstances, so catching your own errors early is worth the effort.
If you missed the underlying due date entirely, file and pay as soon as you can. Penalties are calculated in 30-day blocks, so filing on day 31 costs the same as filing on day 59. Once you cross into the next block, the meter has already advanced.