North Carolina · the return

How North Carolina income tax works: AGI, the standard deduction, 3.99%

A walk down Form D-400 from the first line to the last: why it starts from federal adjusted gross income, the short list of additions and the three subtractions that matter, a standard deduction that is separate from the federal one, the child deduction that stands in for a child credit, the flat rate and where it goes next, the near-absence of credits, and how the money gets paid in. For anyone who files here.

By Charles Trautman, EA, editor

Need to Know Tax · written from North Carolina Department of Revenue sources, November 3, 2026; updated November 12, 2026 after the election · not yet reviewed by a North Carolina practitioner

North Carolina taxes income one way: federal adjusted gross income, plus a few additions, minus a few subtractions, minus the state’s own standard deduction (or its own short list of itemized deductions) and a deduction for each child, times 3.99%. That is the whole return. There are no brackets, no personal exemptions, no local income tax anywhere in the state, and almost no credits. The 3.99% rate for 2026 is the last step of a schedule set in 2023, down from 4.25% in 2025, and the 2026 budget act wrote in the next decade: 3.49% for 2027 through 2029, 3.24% for 2030 through 2032, 2.99% from 2033. Few states can tell a reader what next year’s rate will be. North Carolina can.

The design has one consequence that explains most of the surprises people have on this return. Because the starting point is AGI, every federal deduction taken below that line is invisible here. The federal standard deduction of $32,200 joint for 2026, the $6,000 senior deduction, the new deductions for tips, overtime and car-loan interest, the 20% qualified business income deduction: none of them reduce North Carolina tax by a dollar. The Department of Revenue said so plainly in its September 2026 FAQ. A federal adjustment taken above the line, an IRA contribution, an HSA deposit, student loan interest, half of self-employment tax, flows through and cuts the state tax at 3.99%.

Who files

A full-year resident reports all income from everywhere and takes a credit on Form D-400TC for tax paid to another state on income taxed by both. A part-year resident or a nonresident with North Carolina-source income files the same D-400 with Schedule PN, which works out the North Carolina share; that is covered in Moving to North Carolina. A return is required when gross income exceeds the standard deduction for your filing status: $12,750 single, $25,500 married filing jointly, $19,125 head of household. Gross income for this test includes income the state does not tax, so a retired state employee whose entire $40,000 pension is exempt still has to file to claim the exemption. Married couples who file a joint federal return must file jointly here if both are residents or both have North Carolina taxable income; the filing status circle on the D-400 has to match the federal one.

Where it starts: federal AGI

Line 6 of the D-400 is federal adjusted gross income, copied from line 11 of Form 1040. Everything the federal return does after that line never arrives. That cuts both ways. North Carolina gives nothing for the federal standard deduction, the age-65 addition or the senior deduction, but it also does not need an add-back for them, because they were never subtracted from AGI in the first place. What it does instead is apply its own standard deduction and its own itemized deductions, described below, after a short detour through Schedule S.

The additions

Schedule S, Part A, lists the additions. For most households there is one that comes up, and for many there is none.

Other states’ municipal bond interest. Interest on bonds issued by other states and their cities is tax-exempt federally but taxed here. Interest on North Carolina bonds stays exempt. A brokerage 1099 that lumps municipal interest together has to be split by issuer.

Bonus depreciation and section 179. North Carolina has decoupled from federal bonus depreciation for years and did not change course when the 2025 federal law restored 100% bonus depreciation. A sole proprietor, landlord or farmer who claimed it adds back 85% of the federal amount on Schedule S Line 3, then deducts 20% of that add-back in each of the next five years on Part B. Section 179 expensing above the state’s limit works the same way on Line 4. Over the life of the asset the totals match; the timing does not. New in 2026, the same treatment applies to domestic research expenses written off under IRC 174A: 80% added back on Part A Line 15, recovered 25% a year over four years.

Smaller ones. Nonqualified withdrawals from a 529 plan, certain discharged mortgage debt, and student loan discharges that were excluded federally under the 2021–2025 rule (public service and death-or-disability discharges stay excluded) (verify).

The subtractions

Schedule S, Part B, is where the return gives money back. Three lines do nearly all the work for individuals.

The main subtractions on Schedule S, Part B (2025 line numbers; 2026 instructions post in January 2027)
Subtraction	Where	Limit
State or local income tax refund that was taxed federally	Line 17	All of it
Interest on U.S. Treasury bonds, bills and savings bonds	Line 18	All of it
Taxable Social Security and Tier 1 and Tier 2 railroad retirement	Line 19	All of the federally taxable amount, any age, any income
Bailey settlement retirement benefits (state, local and federal government plans, with five years of service by August 12, 1989)	Line 20	All of it; attach the 1099-R
Military retirement pay after 20 years or a Chapter 61 medical retirement, and Survivor Benefit Plan payments	Line 21	All of it
20% of a prior year’s bonus depreciation add-back	Line 23	Per the five-year schedule
25% of a prior year’s 174A research add-back (new)	Line 40	Per the four-year schedule

What is not on the list: pensions from private employers, IRA and 401(k) withdrawals, Roth conversions, pensions from other states’ governments, and the federal senior deduction. All of those are taxed in full. The retirement rules are in North Carolina for retirees.

The standard deduction, or North Carolina’s own itemized deductions

After Schedule S, Line 11 of the D-400 takes one of two things. The North Carolina standard deduction is $12,750 single or married filing separately, $25,500 married filing jointly or surviving spouse, $19,125 head of household. These are set in statute, not indexed, and have not moved since 2022; the Department confirmed no increase was enacted for 2025, and the same figures carry into 2026 unless the legislature acts. There is no extra amount for age 65 or blindness and no personal exemption of any kind. A married person filing separately whose spouse itemizes gets $0.

The alternative is North Carolina itemized deductions on Schedule A, and here is the point most people miss: the state choice is separate from the federal one. You can take the federal standard deduction and still itemize for North Carolina, and because the state standard deduction is $6,700 smaller than the federal one on a joint return, homeowners with a mortgage and a habit of giving often should. The state Schedule A is short.

North Carolina itemized deductions, Schedule A
Deduction	Limit
Home mortgage interest plus real estate property tax	Combined cap of $20,000 per return
Charitable contributions	As allowed under IRC 170
Medical and dental expenses	The amount over 7.5% of federal AGI
Repayment of claim-of-right income	Over $3,000, or by worksheet
Gambling losses (new for 2025 and later)	To the extent of winnings, as under IRC 165(d); Line 9, write “Gambling Loss”

State and local income taxes are never deductible on the state return, so the federal SALT cap, $40,400 for 2026, has no counterpart here. The $20,000 cap on mortgage interest plus property tax is the state’s own and was not raised when the federal cap was.

The child deduction

North Carolina has no child tax credit. In its place is a deduction on Line 10 for each child who qualifies for the federal child tax credit, and the amount depends on filing status and federal AGI. On a joint return it is $3,000 per child up to $40,000 of AGI, then $2,500 to $60,000, $2,000 to $80,000, $1,500 to $100,000, $1,000 to $120,000, $500 to $140,000, and nothing above that. Head-of-household filers run from $3,000 at $30,000 of AGI to zero above $105,000; single filers from $3,000 at $20,000 to zero above $70,000. The full table is in Credits and breaks for North Carolina families.

Keep the scale in mind. A deduction of $3,000 at 3.99% is $120 of tax per child; $500 is $20. It is a deduction, not a credit, and a family that owes no North Carolina tax gets nothing from it.

The rate

AGI, plus additions, minus subtractions, minus the standard or itemized deduction, minus the child deduction, is North Carolina taxable income. Multiply by 3.99% and that is the tax. Wages, interest, dividends, capital gains, rent, pensions, unemployment and lottery winnings all pay the same rate; there is no preferential rate for capital gains and no zero bracket. No city, county or school district in North Carolina levies an income tax, so the D-400 is the only income tax return a resident files.

The rate has fallen every year since 2022: 4.99% that year, 4.75% in 2023, 4.5% in 2024, 4.25% in 2025 and 3.99% for 2026. The Department’s rate page still says 2027 is “subject to triggers,” but the 2026 Appropriations Act (S.L. 2026-41) removed the revenue triggers and fixed the schedule: 3.49% for 2027 through 2029, 3.24% for 2030 through 2032, 2.99% from 2033, with up to two further quarter-point cuts toward 2.49% between 2035 and 2040 if revenue targets are met. A constitutional amendment approved on November 3, 2026 with about 62% of the vote lowers the ceiling on the rate from 7% to 3.5%, for tax years beginning in 2027; it does not change the 2026 or 2027 rates already set by statute. The details are in What’s new in North Carolina for 2026.

The credits

This is the shortest section of any state return in this series. North Carolina repealed its earned income credit after 2013 and its child and dependent care credit after 2014, and it has no credit for education, tuition, 529 contributions, rent, property tax, seniors or charitable gifts. Nothing on the individual return is refundable. What remains on Form D-400TC:

North Carolina individual credits, 2026
Credit	Amount	Limit
Tax paid to another state or country (Part 1, Line 7a)	The lesser of the net tax paid there or the North Carolina tax on the same income	Residents only; attach the other state’s return
Historic rehabilitation (Article 3L, Form NC-Rehab) and installments of expired Article 3D and 3H credits	Per the certification	Nonrefundable
Business incentive credits (Form NC-478)	Varies	50% of tax

A low-income family that owes no North Carolina tax gets nothing back from the state. Its relief comes before the rate, through the standard deduction and the child deduction, and it ends when the tax reaches zero.

Worked example: a family of four

Married, both under 65, two children ages 8 and 14. Wages of $88,000 after $5,000 of 401(k) contributions already out of the W-2, and $2,000 of interest and dividends. Mortgage interest of $9,000, property tax of $3,200, charitable gifts of $3,000. North Carolina withholding of $2,700. They take the federal standard deduction.

Federal AGI (D-400 Line 6)	$90,000
Schedule S additions and subtractions	$0
North Carolina standard deduction, joint	−$25,500
Child deduction: 2 × $1,500 (joint, AGI $80,001–$100,000)	−$3,000
North Carolina taxable income	$61,500
Tax at 3.99%	$2,454
Withholding	−$2,700
Refund	$246

The state Schedule A was checked and rejected: $12,200 of mortgage interest and property tax plus $3,000 of gifts is $15,200, well under the $25,500 standard deduction. Had the family earned $10,001 more, the child deduction would have dropped to $1,000 each, costing $40 of tax on top of the $399 on the added income. The federal standard deduction of $32,200 played no part.

Withholding and estimated payments

Wage withholding is figured from Form NC-4 (or the simpler NC-4EZ), and for a wage earner with no other income it comes out close. Pension and IRA payers withhold under Form NC-4P: if you file nothing, periodic payments are withheld as if you were single with no allowances, and lump sums are withheld at a flat 4%. You can elect out on Line 1 of the NC-4P, which is what a Bailey retiree whose pension is exempt should do, and what a retiree with a taxable private pension should not.

Anyone who expects to owe $1,000 or more after withholding and credits must make estimated payments on Form NC-40 (or online), due April 15, June 15, September 15 and January 15. The safe harbor is 90% of this year’s tax or 100% of last year’s, paid in four equal, timely installments; North Carolina has no 110% rule for higher earners. Underpayment interest is figured on Form D-422. The usual people caught are the self-employed, landlords, anyone with a large capital gain or Roth conversion, and retirees whose pension payer withholds nothing. See Estimated payments.

How to file

Most returns are filed electronically with the federal return through tax software; the Department’s NC Free File program offers free filing through vendor partners for those who qualify, and eFile allows direct deposit and bank-draft payment with no fee. IRS Direct File, which covered North Carolina for the 2025 season, was not offered for 2026. The return is due April 15, 2027. If you have a federal extension, fill in the “Federal Extension” circle on the D-400 and the state extension to October 15 is automatic; otherwise file Form D-410 by April 15. An extension does not extend the time to pay; interest and a late-payment penalty run from April 15 on anything unpaid. Dates, forms and refund tracking are in North Carolina calendar and forms.

What trips people up

The federal senior, tips or overtime deduction expected to lower the state tax. None of them reach the D-400.
A private pension or IRA withdrawal assumed to be exempt because Social Security is. Only Social Security, Bailey and 20-year military retirement come off.
Itemizing for North Carolina never considered because the family “took the standard deduction.” The state choice is separate.
The child deduction treated as a credit, or claimed for a 17-year-old who no longer qualifies for the federal child tax credit.
Out-of-state municipal bond interest left off Schedule S.
Bonus depreciation on a Schedule C, E or F carried into the state return with no 85% add-back, or the 20% recovery forgotten in later years.
Gambling winnings reported net of losses. Winnings go in AGI in full; losses go on the state Schedule A, and only if you itemize for North Carolina.
A nonresident spouse’s income left off a joint return. If you filed jointly federally and both have North Carolina taxable income, the state return is joint too.
The extension treated as an extension to pay.

Behind the scenes: the 2013 rewrite

Until 2013 North Carolina had three brackets topping out at 7.75%, personal exemptions, a state earned income credit and a child care credit. The Tax Simplification and Reduction Act of 2013 (S.L. 2013-316) swept all of that away for 2014: one flat rate of 5.8%, a larger standard deduction in place of exemptions, a child credit that later became today’s child deduction, and no EITC. The same session repealed the estate tax for deaths after 2012. Every budget since has pushed the rate down, and the standard deduction was raised in steps to its current figures in 2022 and then left alone. The result is a return that is simple to compute and generous to no one in particular: what you keep depends almost entirely on the rate.

The choice of federal AGI as the starting point is older than the flat tax. It means that when Congress creates a new below-the-line deduction, as it did in 2025 for tips, overtime and seniors, North Carolina keeps taxing that income automatically, without a vote in Raleigh. A 2025 bill to exempt tips and overtime at the state level did not pass. When Congress changes something above the line, the state follows only after the legislature moves its conformity date, which it did in July 2026 (S.L. 2026-31), adopting the Internal Revenue Code as of July 5, 2025.

What to bring

Every W-2, 1099-R, SSA-1099 and 1099-INT/DIV, including the state breakdown of any municipal bond interest
For a government or military pension: the 1099-R, and your retirement date or years of service as of August 12, 1989
Mortgage interest statement (Form 1098), the property tax bill, and charitable receipts, even if you take the federal standard deduction
Medical bills if they might exceed 7.5% of AGI
Gambling win/loss statements
Depreciation schedules for any business or rental property
North Carolina estimated payments made, with dates
If you moved or worked in another state: the dates, income by period, and the other state’s return
Any letter from the North Carolina Department of Revenue

Questions people ask

I don’t owe federal tax on my tips anymore. Why do I owe North Carolina?

Because the federal tips deduction comes off after adjusted gross income, and the D-400 starts from AGI. On $8,000 of tips the state tax is $319. The same is true of the overtime deduction, the car-loan interest deduction and the $6,000 senior deduction. The Department confirmed in September 2026 that no matching state deduction exists.

Does North Carolina have a standard deduction?

Yes: $12,750 single, $25,500 joint, $19,125 head of household, with no addition for age or blindness and no personal exemptions. It is separate from the federal standard deduction, and you can itemize for the state without itemizing federally.

Is there a local income tax where I live?

No. No North Carolina city, county or school district levies one. Local governments live on property tax and their share of the sales tax.

Can I deduct my property taxes and mortgage interest?

On the state Schedule A, yes, up to a combined $20,000, along with charitable gifts and medical expenses over 7.5% of AGI, if the total beats your standard deduction. State income tax is never deductible on the state return.

Does North Carolina tax capital gains at a lower rate?

No. Gains arrive inside federal AGI with federal basis and netting intact and are taxed at 3.99% like wages. The home-sale exclusion flows through because excluded gain never enters AGI.

Is my state refund from last year taxable?

Federally, only if you itemized and deducted the state tax that produced it. If it was taxed federally it is in your AGI, and North Carolina takes it back out on Schedule S Line 17.

What will the rate be next year?

3.49% for 2027, under the 2026 budget act, and the schedule continues down to 2.99% in 2033. The Department’s rate page had not yet been updated when this was written.

Above the line counts; below the line never arrives

Get federal AGI right, take the three subtractions you qualify for, check whether the state Schedule A beats $25,500, and the North Carolina return is finished.

Written by Charles Trautman, EA, editor  ·  Need to Know Tax, Lone Tree, Colorado
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Sources and where to check

Updated November 12, 2026, after the November 3 election · tax year 2026 figures · awaiting review by a North Carolina practitioner