Key takeaways
- Frequency follows average monthly tax: under $100 files annually, $100 to $500 quarterly, and more than $500 monthly.
- Three 2026 monthly due dates move off the 20th: June 22, September 21 and December 21.
- The December 2026 monthly and quarterly return is due January 20, 2027, and the annual 2026 return is due February 5, 2027.
- The state rate is 6.875%, and the local add-on depends on the sale location, so a flat rate in the client's software is a risk.
- A return is required even with no taxable sales, and the Department may send no reminder.
Where the return is filed and who files
Minnesota requires the Sales and Use Tax return to be filed online through e-Services, the Department of Revenue's portal. Simplified Electronic Returns through a web service are also accepted, which matters if the client uses a certified service provider or a multi-state tax engine.
Every account on file has to file for every assigned period. If the client had no taxable sales, the Department says to file a zero return anyway. A dormant account that quietly skips periods is the usual way a small client ends up with a late-filing penalty on a return showing no tax.
The Department also warns that it may not send a reminder before a return or payment is due. Treat the due date calendar as your firm's job, not the portal's.
How the filing frequency is set
The Department sets the schedule from the account's monthly Sales and Use Tax liability, including local sales and use taxes that Revenue administers. The bands are average tax of less than $100 per month for annual filing, $100 to $500 per month for quarterly filing, and more than $500 per month for monthly filing.
Worked example: a client collects $2,400 of tax in a year, which averages $200 a month, so the account is quarterly. If the client lands a large contract and collects $9,000 in one quarter, that is $3,000 a month and the account belongs in the monthly band. Compare the client's actual monthly average to the bands each fall, and look at the frequency the portal displays before relying on your own math.
The Department's filing page does not describe the process or notice for moving an account between bands. If a client's volume changes sharply, confirm the assigned frequency in e-Services before the first period of the new year, because the due dates below follow the assigned frequency.
2026 due dates and the weekend shift
The Department's 2026 table lists these monthly due dates: January return February 20, February return March 20, April return May 20, July return August 20 and October return November 20. Three move because the 20th falls on a weekend: the May return is due June 22, the August return is due September 21, and the November return is due December 21.
Quarterly and monthly filers share four dates: the March return is due April 20, the June return July 20, the September return October 20, and the December 2026 return January 20, 2027. Annual filers file the calendar year 2026 return by February 5, 2027.
The shift rests on Minnesota Statutes section 270C.39: when the last day to pay tax or file a return falls on a Saturday, Sunday or legal holiday, the act is timely on the next day that is not one. The Department's table already shows the moved dates, so copy them from the table rather than computing them.
Today is November 9, so the October 2026 monthly return is due November 20, 2026, and the November 2026 monthly return is due Monday, December 21, 2026., and the November 2026 monthly return is due Monday, December 21, 2026. Put the December 21 date in the client's calendar now, since it lands in the week before the holidays.
State rate, local taxes and the Twin Cities stack
The state rate is 6.875%. Cities, counties and special areas add to it, and the Department's rate guide for October 1 through December 31, 2026 lists the combined rate by location. In the Twin Cities seven-county area, the Metro Area housing tax is 0.25% and the Metro Area transportation tax is 0.75%, which is 1.00% together on taxable sales in Anoka, Carver, Dakota, Hennepin, Ramsey, Scott and Washington counties.
Worked example: a taxable sale of $10,000 delivered in Anoka is taxed at 6.875% state, plus 1.00% metro area, plus 0.25% county transit, for 8.125%. A sale in a location with only the state rate carries 6.875%, so a single flat rate in the client's invoicing software misstates tax on every metro sale.
The rate guide excludes special local taxes on admissions, entertainment, food and beverage, lodging, liquor and restaurants. For those clients, run the Department's Sales Tax Rate Calculator or Map for each location. The guide itself says the table does not relieve the seller of the duty to charge the correct rate.
Late filing, late payment and interest
The Department lists a late filing penalty of 5% of any tax not paid by the regular due date. The late payment penalty on sales tax is 5% of the unpaid tax plus another 5% for each additional 30 days or fraction, capped at 15%. Interest for 2026 is 7%. On $4,000 of unpaid tax, the late payment penalty tops out at $600, and the late filing penalty is $200.
Two penalties are easy to miss. Paying by another method when electronic payment is required carries a penalty of 5% of the non-electronic payment, and a repeat penalty of 25% of the tax not timely paid can follow a warning letter. Answer any warning letter the day it arrives, since it is the precondition for the repeat penalty.
A late return filed with payment still costs money, so tell the client the date you need the numbers, not the date the return is due. Penalty abatement for reasonable cause is a separate request with the Department; ask for it, do not assume it.
June accelerated payments: current and 2027 rules
The Department's June Accelerated Filer page says the June accelerated payment for Sales and Use Tax ended with a 2021 law change, so a 2026 client does not make one. That page was last updated in March 2022, so the legislative record is the better check on what comes next.
The 2025 legislative bulletin says Minnesota Statutes section 289A.20 now requires vendors with liability of $250,000 or more in the previous fiscal year ending June 30 to pay 5.6 percent of estimated June liability two business days before June 30, and the rest on or before August 20. It takes effect for taxes remitted after May 31, 2027, with a penalty of ten percent of the unpaid June amount. Flag it to any client near $250,000 of annual liability when you plan 2027.
What to collect from the client each period
Request the period sales report broken out by taxable, exempt and non-taxable sales, plus the tax collected by location. Match the tax collected to the sales report before filing; a variance means a wrong rate, a missed exemption, or tax recorded in the wrong account.
Ask for exemption certificates on every exempt sale. The Department's list of records to keep includes bills, receipts, invoices, cash-register tapes, exemption certificates, shipping documents and the worksheets used to prepare returns, so keep your tie-out worksheet with the filed return.
A message that works: "For the October return due November 20, please send the October sales report by taxable and exempt, A message that works: "For the October return due November 20, please send the October sales report by taxable and exempt, the exemption certificate for every exempt sale, and any refunds or credit memos issued. If there were no sales, tell us so we can file a zero return"., and any refunds or credit memos issued. If there were no sales, tell us so we can file a zero return".
e-Services drops amounts under 50 cents and rounds 50 to 99 cents up to the next dollar, so a return that is a few dollars off the books is rounding, not an error. Usual can hold a recurring monthly request with a due date and automatic reminders, which keeps the report and certificates coming without a manual chase.