How Minnesota income tax works: federal AGI, the state’s own deductions, four brackets

Minnesota builds its income tax on federal adjusted gross income, line 11 of Form 1040, and then does its own arithmetic from there. It has its own standard deduction, $30,600 for a married couple and $15,300 for a single filer in 2026, its own itemized deductions on Schedule M1SA, a $5,300 exemption for each dependent and none for the taxpayer, and four graduated rates: 5.35%, 6.8%, 7.85% and 9.85%. Because the return starts from AGI, nothing the federal return does below that line, the federal standard deduction, the $6,000 senior deduction, the deductions for tips, overtime and car-loan interest, ever reaches Minnesota. What Minnesota gives back it gives through its own subtractions and a set of refundable credits for children, renters and working families that are among the largest a state pays.

Two consequences follow. First, the Minnesota decision to itemize or take the standard deduction is separate from the federal one, and since Minnesota never allows a deduction for state income tax, the right answer often differs. Second, a federal adjustment taken above the line, an IRA contribution, an HSA deposit, student loan interest, flows through and cuts Minnesota tax too, while a deduction taken below the line is worth nothing here. A server who owes no federal tax on $8,000 of tips still owes Minnesota tax on all of it.

Who files

A full-year resident reports all income, wherever earned, and takes a credit on Schedule M1CR for tax paid to another state on income taxed by both. Part-year residents and nonresidents attach Schedule M1NR, which prorates the tax to the Minnesota share. The filing threshold for 2026 is $15,300 of Minnesota gross income, and it is worth filing below it to recover withholding or to claim the refundable credits. Residents of Michigan and North Dakota who earn wages in Minnesota are the exception: under the reciprocity agreements only their home state taxes those wages. See Moving to Minnesota.

Where it starts: federal AGI

Line 1 of Form M1 is federal adjusted gross income, copied from the 1040. That one fact explains most of what follows. AGI is income after the adjustments on federal Schedule 1 but before the standard deduction and everything beneath it. So the federal standard deduction never reaches Minnesota, and neither do the extra federal deductions for age, the $6,000 senior deduction for 2025 through 2028, the deductions for tips, overtime and car-loan interest, or the 20% qualified business income deduction. None of them needs an add-back, because none of them was ever taken out. Minnesota rebuilds its deductions from AGI with its own numbers.

Bills to add state subtractions for tips and overtime were laid over in the 2026 session and were not in the omnibus tax bill signed in May 2026. For the 2026 return, tips and the overtime premium are fully taxed by Minnesota. See What is new in Minnesota for 2026.

The additions

Schedule M1M adds a short list of items to AGI. For most wage earners there is none; for a few households there is one.

Other states’ municipal bond interest. Federally tax-exempt interest on bonds issued by other states and their cities is added back here; interest on Minnesota and Minnesota local government bonds is not. A brokerage 1099 that lumps all municipal interest together has to be split.

Bonus depreciation. Minnesota follows the federal 100% bonus depreciation with a long-standing modification: 80% of the bonus deduction is added back in the year it is taken, then subtracted in equal fifths over the next five years. A landlord, farmer or sole proprietor who claimed bonus depreciation on a federal Schedule C, E or F carries the add-back onto Schedule M1M. Over the life of the asset the totals match; the timing does not. Section 179 expensing at the federal limit is allowed in full with no add-back.

New for 2026. The 2026 tax bill adopted most of the 2025 federal law but declined a few pieces, and each refusal is an add-back: employer student-loan payments and educational assistance above $5,250 (verify), 529 withdrawals for postsecondary credentialing programs, and transportation fringe benefits above the pre-2025 limit. Few returns will see any of them.

The subtractions

This is where the return gives money back. The large ones are on Schedule M1M; a few have their own schedules.

Pensions, IRA and 401(k) withdrawals and Roth conversions have no subtraction of their own; they are taxed at the regular rates at any age. The retiree’s side of the return is in Minnesota for retirees.

Social Security. This is the subtraction most people ask about. Since tax year 2023 the simplified method takes every dollar of federally taxable Social Security off the return when AGI is at or below $110,780 on a joint return or $86,410 for a single filer or head of household. Above the line the subtraction shrinks by 10% for each $4,000, or part of $4,000, of AGI over it, so it is gone at $150,780 joint and $126,410 single. A retired couple on Social Security and a modest pension pays Minnesota nothing on the benefits; a couple with a large IRA withdrawal in the same year can lose the subtraction for that year.

K-12 expenses. Minnesota lets parents deduct school costs two ways. The subtraction on Schedule M1M has no income limit and includes private school tuition. The credit on Schedule M1ED, covered below, is worth more per dollar but has an income limit and excludes tuition. The same dollars cannot be used for both.

The standard deduction, itemizing, and the dependent exemption

From AGI after additions and subtractions, Minnesota takes its own standard deduction: $30,600 for married filing jointly or a qualifying surviving spouse, $23,000 for head of household, $15,300 for single or married filing separately. Each spouse 65 or older or blind adds $1,600 on a joint return; a single filer or head of household adds $2,000. A dependent who files has a standard deduction of the greater of $1,300 or earned income plus $350, capped at the regular amount.

Or itemize on Schedule M1SA. Minnesota’s itemized deductions are medical expenses over 7.5% of AGI, real and personal property taxes up to $10,000, mortgage interest, charitable gifts above a floor of 1% of AGI for 2026, casualty losses and gambling losses to the extent of winnings. State income tax and sales tax are never deductible. Because that is the item that pushes most federal itemizers over the federal standard deduction, many households that itemize federally take the Minnesota standard deduction, and a few with large medical bills or property taxes do the reverse. Both the standard deduction and itemized deductions phase down for AGI above $244,400, with a second step at $337,800 and a floor that preserves 20% of the deduction above $1,107,750.

There is no personal exemption for the taxpayer or spouse. Each dependent claimed on the federal return earns a $5,300 exemption, which phases out when AGI passes $366,700 on a joint return, $305,600 for head of household, $244,500 single. A married couple with two children therefore takes $41,200 off before the first dollar is taxed; a single parent of one takes $28,300.

The rates

What is left is Minnesota taxable income, and the four brackets apply to it. All income is taxed at the same rates: wages, interest, dividends, capital gains, rent, pensions, unemployment, gambling winnings. There is no preferential rate for capital gains and no holding-period distinction.

The bracket lines, the standard deduction and the dependent exemption were indexed 2.369% from 2025. The 2027 figures arrive in December 2026.

A married couple pays 5.35% on the first $48,700 of taxable income, which for a family with two children means the first $89,900 of AGI. On top of the regular tax, Minnesota levies its own 1% tax on net investment income above $1,000,000, reported on Schedule NIIT; it uses the federal Form 8960 definition and is not offset by the credit for taxes paid to another state. No city, county or school district in Minnesota taxes income.

The credits

Minnesota credits come in two kinds. The nonrefundable ones on Schedule M1C reduce tax but cannot produce a refund by themselves. The refundable ones on Schedule M1REF are paid out whether or not any tax is owed, and for a family under about $60,000 they are usually larger than the tax.

The child credit and the Working Family Credit are the heart of the system. Together they are reduced by 12% of the greater of earned income or AGI above $38,770 on a joint return or $32,680 for everyone else, so a family with one child loses the last of it at about $56,000 joint, two children at about $71,000, three at about $86,000. The renter’s credit is the other large one, and since 2024 it is claimed on the income tax return rather than on the separate property tax refund form. Homeowners still file Form M1PR by August 15 for the Homestead Credit Refund, which is a separate return and a separate check. The family credits are worked through in Credits and breaks for Minnesota families.

Withholding and estimated payments

Minnesota withholding on wages is figured from Form W-4MN, filled out alongside the federal W-4. A single wage earner usually comes out close; a two-earner couple in the 6.8% bracket often does not, because each employer withholds as if its wages were the only ones. Pension administrators and IRA custodians will withhold Minnesota tax on request, and retirees who decline it often owe at filing.

Anyone who expects to owe $500 or more after withholding and credits is expected to make estimated payments, due April 15, June 15, September 15 and January 15. The threshold is lower than the federal $1,000. The safe harbor is the familiar one: pay in at least 90% of this year’s tax or 100% of last year’s in four timely installments. The penalty is computed on Schedule M15. The usual people caught are the self-employed, landlords, retirees with unwithheld IRA withdrawals, and anyone with a large capital gain.

How to file

Most Minnesota returns are filed electronically with the federal return. The Department of Revenue lists free electronic filing offers from software vendors for taxpayers who meet the vendors’ limits; a state-run free-file system ordered by the 2026 tax bill arrives for the 2027 return, not this one. The return is due April 15, 2027. Minnesota grants an automatic extension to October 15 with no form to file, but the extension is to file, not to pay: tax not paid by April 15 draws interest, and a late-payment penalty applies unless enough was paid by then (verify). The refund can be claimed for three and a half years after the original due date. Dates, forms and where to check a refund are in Minnesota calendar and forms.

What trips people up

• The federal senior, tips or overtime deduction expected to reduce Minnesota tax. It never reaches the return.
• Taking the Minnesota standard deduction by default because the federal return did, when property taxes and medical bills would have carried Schedule M1SA past $30,600.
• A Roth conversion or large IRA withdrawal that, by raising AGI, takes the Social Security subtraction away for the year.
• K-12 expenses put on the credit when income is over the limit, or private school tuition put on the credit at all.
• Form M1PR not filed. It is a separate return, due August 15, and no software files it automatically.
• Bonus depreciation on a Schedule C, E or F carried into Minnesota with no 80% add-back.
• The extension treated as an extension to pay.