Minnesota Form M1 Individual Income Tax Return: Filing, Deadlines, and Credits

Minnesota Form M1 is the state individual income tax return, and completing it means starting from your federal adjusted gross income, applying Minnesota’s own additions and subtractions, calculating tax using the state’s four graduated rates, and then reducing that tax with any credits you qualify for. You cannot work on it in isolation: Form M1 pulls directly from line 11 of your federal Form 1040, so your federal return has to be finished first.¹ For tax year 2025 returns, the filing deadline is April 15, 2026, and rates run from 5.35% to 9.85%.²

Do You Have to File

You need to file if your gross income reaches Minnesota’s filing threshold for your status. The thresholds match the state’s standard deduction amounts for tax year 2025:³

Single under 65: $14,950 (65 or older: $16,950)
Married filing jointly, both under 65: $29,900 (one spouse 65 or older: $31,450)
Head of household under 65: $22,500
Married filing separately: $5, at any age

Part-year residents and nonresidents use the same thresholds, counting only income from Minnesota sources, and they attach Schedule M1NR to allocate income between Minnesota and other states.¹

File anyway if you were below the threshold but had Minnesota tax withheld from a paycheck. That withheld money is yours; the return is how you get it back. There is no penalty for filing when you did not have to.

What to Have in Front of You

Finish your federal 1040 first. Without a final federal AGI, nothing on Form M1 can be calculated correctly, and if you file on paper you have to include a copy of the federal return and its schedules in the envelope.⁴

Then pull together:

W-2s from every employer
1099s for interest, dividends, retirement distributions, and freelance income
Social Security numbers for you, your spouse, and all dependents
Last year’s Minnesota return, for carryforward figures and comparison
Receipts for K-12 education expenses, childcare costs, charitable contributions, and other items you plan to claim

Working Through the Form

Form M1 moves in a predictable sequence. You enter your federal AGI near the top, make Minnesota-specific adjustments, calculate tax, and then apply credits and withholding to arrive at a refund or balance due.

Additions and Subtractions on Schedule M1M

Minnesota does not accept your federal AGI as the final word on your income. Schedule M1M lists items the state requires you to add back and others you are allowed to subtract, and the totals flow into lines 2 and 7 of Form M1.⁵

The most common addition is interest from municipal bonds issued by other states, along with federally exempt dividends from mutual funds holding those bonds. Both are tax-free federally and taxable in Minnesota. You also add back federal deductions tied to income Minnesota does not tax, and the capital gain portion of any lump-sum distribution reported on federal Form 4972.⁵

Subtractions are where returns often get left incomplete. Check whether any of these apply to you:

Social Security benefits. If AGI is below $108,320 (married filing jointly) or $84,490 (single or head of household), you can subtract all Social Security benefits included in AGI. The subtraction phases out by 10% for each $4,000 of AGI above those thresholds.⁶
K-12 education expenses, up to $1,625 per child in grades K–6 and $2,500 per child in grades 7–12 for tuition, textbooks, and certain supplies.⁷
Active-duty military pay earned while a Minnesota resident, plus qualifying National Guard and reservist pay.⁵
Interest from U.S. Treasury bonds and savings bonds, which is taxable federally but not in Minnesota.
Charitable contributions above $500 if you take the standard deduction and do not file Schedule M1SA.⁵
Military pension income.

Schedule M1M also includes narrower subtractions, among them organ donor expenses (up to $10,000), 529 plan contributions, and income earned on a reservation by enrolled American Indians. Read the full schedule once; a few minutes there can be worth real money.

Standard Deduction or Itemize

Most filers take the standard deduction: $14,950 for single, $22,500 for head of household, $29,900 for married filing jointly. Filers who are 65 or older or blind add $2,000 if single or $1,550 per qualifying spouse if married.³ If your itemized deductions come out higher, use Schedule M1SA instead.

Calculating the Tax

Minnesota applies four graduated rates to taxable income. For single filers in tax year 2025, 5.35% covers income up to $32,570, 6.80% runs from $32,571 to $106,990, 7.85% runs from $106,991 to $198,630, and 9.85% applies above $198,630. Married couples filing jointly get wider brackets, with the 5.35% rate reaching $47,620 and the 9.85% top rate starting at $330,411.²

Credits Worth Checking

Credits reduce tax dollar-for-dollar, so they are more valuable than subtractions of the same size. Several Minnesota credits are refundable, meaning they can generate a refund even if you owe no tax.

The Working Family Credit is the state version of the federal Earned Income Tax Credit. It is refundable, and the amount depends on earned income, filing status, and number of qualifying children. You calculate it on Schedule M1CWFC and carry the result to Form M1.⁸

The Child and Dependent Care Credit covers childcare or dependent care costs you paid so you could work or look for work. Use Schedule M1CD and enter the provider’s federal identification number along with qualifying expenses.⁹

The K-12 Education Credit is separate from the K-12 subtraction and is income-limited. AGI must be below $81,820 for one or two qualifying children, $84,820 for three, or $87,820 plus $3,000 for each additional child beyond three. You can claim both the credit and the subtraction for the same child, but the credit applies only to expenses that exceed the subtraction amount.¹⁰

Deadline and the Automatic Extension

Tax year 2025 returns are due April 15, 2026. Minnesota grants an automatic extension to October 15 with no form to file.¹¹

The catch: the extension covers filing, not payment. Any tax owed is still due on April 15, and 7% annual interest accrues on unpaid balances from the original due date until the account is paid in full.¹² If you expect to owe, estimate the amount and send a payment with a voucher before the April deadline.

How to Submit the Return

E-filing is faster, catches math errors, and gets refunds out in a fraction of the time paper takes. Several IRS Free File partners handle Minnesota e-filing at no cost for qualifying taxpayers, and commercial software from the major vendors supports Form M1 for a fee.¹³

Paper filers mail Form M1, all Minnesota schedules, and a copy of the federal return to:

Minnesota Department of Revenue
Mail Station 0010
600 N. Robert St.
St. Paul, MN 55146-0010⁴

The address is the same whether you owe or are getting a refund. If you owe, send the payment voucher and check separately from the return itself so the Department of Revenue credits the payment to your account without delay.⁴

Paying What You Owe

Options for paying a balance due:¹⁴

Direct debit from a U.S. bank account through the Department’s e-Services portal. No fee.
Debit card online, with a 1.25% convenience fee, or credit card with a 2.15% fee, both processed through US Bank.
Scheduled payment through tax software at the time of e-filing.
Check or money order with a payment voucher, mailed separately from the return.

After You File

Use the “Where’s My Refund?” tool on the Department of Revenue site to check status. You will need your Social Security number, date of birth, and the exact refund amount from the return. E-filed returns with direct deposit move much faster than paper. Paper filers who claim the Homestead Credit Refund should not expect status information until at least July.¹⁵

Penalties If You Miss

Minnesota’s civil penalties are set out in Section 289A.60 and can stack:

Late payment: 4% of unpaid tax. You can avoid this if you pay at least 90% of what you owe by April 15, file within six months, and pay the rest when you file.¹⁶
Failure to file: 5% of unpaid tax if the return is not filed by the extended deadline.¹⁶
Extended delinquency: an additional 5% if tax remains unpaid 180 days after the return is filed or the tax is assessed.¹⁶

Interest at 7% annually runs on top of unpaid tax and penalties until the balance is cleared.¹² The filing penalty and the payment penalty run independently, so if you cannot pay in full, file anyway. That alone keeps the smaller mistake from becoming the larger one.

1
Minnesota Department of Revenue. Minnesota Form M1 Individual Income Tax Return
2
Minnesota Department of Revenue. Income Tax Rates and Brackets
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Minnesota Department of Revenue. Minnesota Standard Deduction
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Minnesota Department of Revenue. 2025 Minnesota Individual Income Tax Return M1 Instructions
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Minnesota Department of Revenue. 2025 Schedule M1M Income Additions and Subtractions
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Minnesota Department of Revenue. Social Security Benefit Subtraction
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Minnesota House of Representatives. Minnesota’s K-12 Education Subtraction and Credit
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Minnesota Department of Revenue. Working Family Credit
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Minnesota Department of Revenue. Child and Dependent Care Credit
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Minnesota Department of Revenue. K-12 Education Subtraction and Credit
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Minnesota Department of Revenue. Filing After the Due Date
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Minnesota Department of Revenue. Tax Professional Tip – Income Tax Penalties and Interest Rates
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Minnesota Department of Revenue. Free Electronic Filing
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Minnesota Department of Revenue. Make a Payment
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Minnesota Department of Revenue. Where’s My Refund?
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Minnesota Office of the Revisor of Statutes. Minnesota Code 289A.60 – Civil Penalties