North Carolina State Income Tax: The Flat 4.25% Rate Explained

The North Carolina state income tax rate for 2025 is 4.25%, a single flat rate that applies to every individual taxpayer regardless of income level. There are no tax brackets in North Carolina, which means a person with $40,000 of North Carolina taxable income and a person with $400,000 both pay the same 4.25% rate. This is one of the defining features of the state income tax, and it’s confirmed directly by the North Carolina Department of Revenue on its tax rate schedules page. The flat structure makes the state income tax unusually easy to estimate compared with states that use graduated brackets.

The rate is not static, and that’s important for planning. Under Session Law 2023-134, the state income tax rate is scheduled to drop to 3.99% for tax years after 2025. So the rate you apply on your 2025 return (filed in early 2026) is 4.25%, but the rate on your 2026 income will be 3.99%. The law also builds in the possibility of additional rate reductions starting in 2027 if the state meets specific revenue collection triggers. This downward path has been consistent: North Carolina’s flat rate was 5.75% in 2015, 5.25% from 2019 to 2021, 4.99% in 2022, 4.75% in 2023, and 4.50% in 2024 before reaching the current 4.25%.

To calculate your North Carolina state income tax, you apply the 4.25% rate to your North Carolina taxable income, not to your gross salary and not to your federal adjusted gross income. North Carolina taxable income is what’s left after you start with federal AGI, apply North Carolina-specific additions and subtractions, and then subtract your North Carolina standard or itemized deduction and any child deduction you qualify for. Only that final figure gets multiplied by 4.25%. This distinction matters because two people with the same paycheck can owe different amounts of state income tax once their deductions differ. The arithmetic itself never changes; the rate is constant, so all the variation comes from what counts as taxable income before the rate is applied.

A worked example shows the flat rate in action. Suppose you’re single with a $70,000 salary in 2025 and you take the North Carolina standard deduction of $12,750. Your North Carolina taxable income is $70,000 minus $12,750, which is $57,250. Multiply that by the 4.25% rate and your state income tax is about $2,433 before any credits. If your salary were $140,000 instead, your taxable income would be $127,250, and your tax would be roughly $5,408. Notice that doubling the income roughly doubles the tax, with no bracket jump, because the flat rate treats every dollar the same. Under a graduated system, the higher earner would face a rising marginal rate; under North Carolina’s flat rate, the math stays linear all the way up.

Now compare the 2025 and 2026 rates on the same income to see the scheduled cut. On $57,250 of North Carolina taxable income, the 2025 rate of 4.25% produces about $2,433. The 2026 rate of 3.99% on the same figure produces about $2,284, a savings of roughly $149 from the rate cut alone. On a higher taxable income of $200,000, the difference between 4.25% and 3.99% is $520 a year. These are not life-changing sums for most filers, but they’re real, automatic, and require nothing from you except being a North Carolina taxpayer in 2026 instead of 2025. For a high earner, the cumulative effect of years of declining flat rates adds up to a meaningful sum over a career.

A common mistake is confusing the state income tax rate with the federal rate or assuming North Carolina uses brackets like the IRS does. The federal system has seven brackets ranging from 10% to 37%, and your federal tax is computed bracket by bracket. North Carolina ignores all of that and applies one rate. Another mistake is applying the 4.25% to the wrong income figure, usually gross pay, which overstates the tax. Always run the rate against North Carolina taxable income after deductions, or you’ll badly miscalculate. We explain the federal side, which does use brackets, in our guide to federal tax brackets for 2025, so you can see how the two systems differ side by side.

It’s also worth understanding that the flat rate applies to most types of income North Carolina taxes: wages, salary, self-employment income, interest, dividends, rental income, and most retirement distributions. The big exception is retirement income covered by the Bailey settlement and Social Security benefits, neither of which North Carolina taxes. So the 4.25% rate is broad, but it doesn’t reach every dollar of income equally, because certain income is excluded from North Carolina taxable income before the rate is ever applied. A retiree with fully Bailey-exempt benefits might apply 4.25% to almost nothing. Capital gains and qualified dividends get no special low rate at the state level either, unlike the federal system; North Carolina taxes them at the same flat 4.25% as wages, which surprises investors who are used to preferential federal treatment.

One more practical wrinkle: the flat rate does not change how withholding works on your paycheck. Your North Carolina employer uses Form NC-4 and the state withholding tables to estimate the state income tax to pull from each check, and those tables already build in the 4.25% flat rate for 2025. If you have multiple jobs, a working spouse, or significant non-wage income, the default withholding can be off, leaving you with a balance due or an oversized refund at filing time. A quick mid-year check, comparing your year-to-date North Carolina withholding against 4.25% of your expected taxable income, catches the problem while there is still time to adjust your NC-4 or make an estimated payment. Because the rate is flat, this self-check is genuinely easy to run; you are not chasing a moving marginal rate, just one number applied to one figure, which is the kind of clarity a flat-rate system gives you that a bracketed system never does.

The forward-looking point on the state income tax rate is that it’s both flat and falling. If you’re estimating your tax for planning purposes, use 4.25% for 2025 income and 3.99% for 2026 income, apply it to your taxable income after deductions, and remember that further cuts may come in 2027 and beyond if the state’s revenue triggers are met. For a clean estimate, take your expected North Carolina taxable income, multiply by the applicable flat rate, and subtract any credits. That gives you a reliable number, which is one genuine advantage of a flat-rate state: the arithmetic is honest and predictable. Confirm the current rate each year on the NCDOR site, because the schedule, while set in law now, can be revised by future legislation.

You must file a state income tax return, Form D-400, if your gross income for the year exceeds the standard deduction amount for your filing status, and the rules differ slightly depending on whether you’re a full-year resident, a part-year resident, or a nonresident with North Carolina-source income. The North Carolina Department of Revenue publishes the specific minimum gross income thresholds on its individual income filing requirements page, and those thresholds generally track the North Carolina standard deduction for each filing status. For 2025, that means roughly $12,750 of gross income for a single filer and $25,500 for a married couple filing jointly serves as the practical filing trigger for the state income tax.

The key word in the North Carolina state income tax filing rule is gross income, not taxable income. This trips people up constantly. You can be required to file a North Carolina return even if you’ll owe zero tax after deductions, because the filing requirement is based on your total income before deductions. So if you’re single and your gross income is $20,000, you exceed the $12,750 threshold and must file, even though after the standard deduction your North Carolina taxable income is only $7,250 and your tax is modest. The filing obligation and the tax liability are two separate questions, and clearing the gross income threshold settles the first one regardless of the second.

Full-year residents file Form D-400 reporting all of their income, wherever earned, because North Carolina taxes residents on worldwide income. Part-year residents, people who moved into or out of North Carolina during the year, file Form D-400 along with Schedule PN, the part-year resident and nonresident schedule. Nonresidents who earned income from North Carolina sources, such as wages for work physically performed in the state or income from North Carolina rental property, also file using Schedule PN. The nonresident reports all income to compute a base tax, then prorates the state income tax to the portion actually sourced to North Carolina, so they pay only on what North Carolina can legitimately reach.

There are situations where you should file even when you’re not strictly required to. The most common is when North Carolina income tax was withheld from your wages. If your employer withheld North Carolina tax and your income is below the filing threshold, the only way to get that money back is to file Form D-400 and claim the refund. Skipping the return because you “didn’t have to file” means leaving your own withheld money with the state. Similarly, if you made estimated payments and overpaid, you must file to recover the excess. You may also want to file to qualify for certain refundable amounts or to establish a record for a year you had a loss. We handle exactly these situations, federal and state, in our individual tax return service.

A worked example clarifies the resident filing requirement. Suppose you’re a married couple filing jointly, both retired, with $48,000 of combined income from a private pension and investment accounts. That $48,000 gross income exceeds the $25,500 joint threshold, so you must file Form D-400. After the $25,500 standard deduction, your North Carolina taxable income is $22,500, and at the 4.25% rate your state income tax is about $956. Now change the facts: suppose most of that income is a government pension fully exempt under the Bailey settlement. You still must file because your gross income clears the threshold, but your actual tax could be far lower or even zero once the Bailey deduction is applied on Schedule S. The lesson is that you can be a mandatory filer and a zero-tax filer at the same time.

Part-year and nonresident filing deserves a concrete example too. Imagine you live in South Carolina but spent three months working on a project in Raleigh, earning $25,000 of North Carolina-source wages. You’d file Form D-400 with Schedule PN as a nonresident, report your total annual income to find the base tax, then prorate so North Carolina only taxes the North Carolina-source portion. You don’t pay North Carolina state income tax on your South Carolina earnings, only on the income connected to North Carolina. Meanwhile, your home state may give you a credit for the tax you paid to North Carolina, preventing double taxation on the same dollars. Students, traveling professionals, and remote workers who spend time physically working in North Carolina frequently fall into this category without realizing it.

A common mistake is assuming that because no tax is owed, no return is needed. As covered above, the filing requirement is based on gross income, so plenty of people who owe nothing still have a legal obligation to file the state income tax return. Another frequent error is a part-year resident reporting only their North Carolina income on the base calculation instead of all income, which produces the wrong proration. A third is nonresidents failing to file at all, believing North Carolina can’t reach them, when in fact North Carolina taxes income sourced to the state regardless of where the earner lives. Each of these can generate notices, interest, or penalties down the road, and the state does cross-check wage data reported by employers against filed returns.

The deadline for Form D-400 is April 15, matching the federal due date. North Carolina grants an automatic extension to file when you’ve filed a federal extension, but the extension only extends the filing date, not the payment date. Any state income tax you owe is still due April 15, and interest accrues on unpaid amounts after that, even with a valid extension. The forward-looking takeaway: check your gross income against the threshold for your filing status each year, file if you clear it or if you want withheld tax refunded, and pay any balance by April 15 regardless of extensions. When residency changes or multi-state income is involved, that’s the point to bring in a CPA, because Schedule PN and the credit for taxes paid to other states are where errors get expensive.

The North Carolina standard deduction for 2025 is $12,750 for single filers and for married filing separately, $25,500 for married filing jointly or qualifying surviving spouse, and $19,125 for head of household. These amounts are set by the state and are not the same as the federal standard deduction, a distinction the North Carolina Department of Revenue stresses on its standard deduction page. You enter the North Carolina amount on Line 11 of Form D-400, and you should never substitute your federal standard deduction figure there, which is one of the most common North Carolina state income tax errors.

On your North Carolina return, you take the larger of the North Carolina standard deduction or your North Carolina itemized deductions. For most filers, the standard deduction wins, because North Carolina itemized deductions are more limited than federal ones. North Carolina does not allow most of the itemized deductions you might claim federally. The only items allowed as North Carolina itemized deductions are qualified home mortgage interest, real estate property taxes, charitable contributions, medical and dental expenses, and repayment of claim-of-right income. Notably, the combined deduction for qualified mortgage interest and real estate property taxes is capped at $20,000, which limits the benefit for homeowners with large mortgages in high-cost areas.

One difference from the federal system catches older taxpayers off guard. The federal standard deduction gives an additional amount to taxpayers who are 65 or older or blind. North Carolina does not. There is no extra North Carolina standard deduction for age or blindness, so a 70-year-old single filer gets the same $12,750 North Carolina standard deduction as a 30-year-old single filer. This means seniors who are used to a larger federal standard deduction may find their North Carolina standard deduction smaller than expected, which affects their North Carolina taxable income and therefore their state income tax. It’s a quiet trap for retirees who assume the federal generosity carries over to the state.

Beyond the standard deduction, North Carolina parents may claim the child deduction, which stacks on top. The child deduction is a deduction, not a credit, and the amount per qualifying child depends on your adjusted gross income and filing status, per the NCDOR child deduction page. For married couples filing jointly, the deduction is $3,000 per child for AGI up to $40,000, then steps down to $2,500, $2,000, $1,500, $1,000, and $500 as AGI rises, reaching $0 once AGI exceeds $140,000. Single and head-of-household filers have lower AGI thresholds for the same step-down. A qualifying child is generally one for whom you claim the federal child tax credit under Section 24 of the Internal Revenue Code.

A worked example pulls the pieces together. Take a married couple filing jointly with two children and a combined salary of $90,000 in 2025. They take the North Carolina standard deduction of $25,500. Their AGI of $90,000 falls in the band where the child deduction is $1,500 per child, so they deduct an additional $3,000 for the two children. Their North Carolina taxable income is $90,000 minus $25,500 minus $3,000, which is $61,500. At the 4.25% rate, their state income tax is about $2,614. Without the child deduction, their tax would have been about $2,741, so the two children saved them roughly $128 on the North Carolina return. It’s modest at this income level, but it’s automatic if you claim it correctly.

Compare that with the same couple at a lower income to see the child deduction’s bigger impact. If their AGI were $38,000, they’d qualify for the full $3,000 per child, or $6,000 total. Their taxable income would be $38,000 minus $25,500 minus $6,000, which is $6,500, and their state income tax would be about $276. The child deduction matters far more at lower incomes, because the per-child amount is larger and it represents a bigger share of a smaller tax bill. This is a deliberate feature: the North Carolina child deduction is designed to give more relief to lower- and middle-income families, and the benefit fades out as income climbs toward the phase-out ceiling.

The most common North Carolina standard deduction mistake, and NCDOR calls it out explicitly, is entering your federal standard deduction or federal itemized deductions on Line 11 of Form D-400. The North Carolina amounts are different, and using the wrong figure produces an incorrect North Carolina taxable income and an incorrect tax. Another mistake is itemizing on the North Carolina return when the standard deduction would have been larger, or vice versa, without actually comparing the two. And a third is forgetting that North Carolina itemized deductions are narrower than federal ones, so a filer who itemizes federally may still come out ahead taking the North Carolina standard deduction. We catch these comparisons routinely in our tax return preparation work, because the optimal choice on the federal return is not always the optimal choice on the state return.

There is also a planning angle worth knowing about the North Carolina standard deduction versus itemizing. Because North Carolina only allows five categories of itemized deductions and caps mortgage interest plus property tax at $20,000, many homeowners who comfortably itemize on their federal return still land below the North Carolina standard deduction at the state level. Run both numbers before you choose. A married couple with $18,000 of allowable North Carolina itemized deductions is better off taking the $25,500 standard deduction, because the standard amount is larger and requires no documentation. Conversely, a couple with $30,000 of qualifying charitable contributions and medical expenses should itemize on the North Carolina return, since that exceeds the standard deduction and lowers their state income tax. The point is that the federal and state itemize-or-standard decisions are made separately, and the answer can differ between the two returns for the very same household in the very same year.

The forward-looking takeaway on the North Carolina standard deduction is to treat it as a separate calculation from your federal return. Pull the correct North Carolina figure for your filing status, $12,750, $25,500, or $19,125 for 2025, compare it honestly against your limited North Carolina itemized deductions, and don’t assume the federal answer carries over. Layer the child deduction on top if you have qualifying children, and remember the AGI step-down. Done right, the standard deduction and child deduction are where you actually lower your North Carolina state income tax, because the flat rate itself isn’t going to move. Confirm the current-year amounts on the NCDOR site each filing season, since the figures can be adjusted by the legislature, and keep documentation for any itemized deductions you claim in case the state asks.

North Carolina does not tax Social Security benefits at all, but it does tax most other retirement income at the flat 4.25% rate, with one major exception: retirement benefits protected by the Bailey settlement. Whether your pension or retirement-account withdrawals are taxable by North Carolina depends almost entirely on whether they qualify under Bailey, which makes this one of the most consequential questions for anyone retiring in or moving to North Carolina. The rules are spelled out by the North Carolina Department of Revenue on its Bailey decision page, and they shape the state income tax bill of every government retiree in the state.

Start with the simple part. Social Security retirement benefits are fully exempt from state income tax. North Carolina does not tax Social Security regardless of your income level or the source of your other income. So if your only income is Social Security, you owe no North Carolina state income tax on it, and depending on your total gross income you may not even be required to file. This is a meaningful benefit compared with the handful of states that still tax a portion of Social Security benefits. Because North Carolina starts from federal AGI and then subtracts the taxable portion of Social Security, none of those benefits flow through to the North Carolina tax.

Now the Bailey settlement, which is where the real money is for certain retirees. Because of the North Carolina Supreme Court decision in Bailey v. State of North Carolina, the state cannot tax retirement benefits from qualifying government plans if the retiree had at least five years of creditable service as of August 12, 1989. Qualifying plans include the North Carolina Teachers’ and State Employees’ Retirement System, the North Carolina Local Governmental Employees’ Retirement System, the Consolidated Judicial Retirement System, the federal Civil Service Retirement System, the Federal Employees’ Retirement System, and military retirement. It also covers the state’s 401(k) and 457 plans if the retiree contributed or contracted to contribute before that 1989 date. Eligible retirees claim the exclusion as a deduction on Line 20 of Form D-400 Schedule S.

The five-years-of-service-by-1989 requirement is strict and it’s the dividing line. If you had five or more years of creditable service in a qualifying plan as of August 12, 1989, your benefits from that plan are exempt from North Carolina state income tax, no matter how large. If you didn’t, your benefits from that same plan are taxable at 4.25%. This creates situations where two retired teachers with identical pensions pay completely different North Carolina taxes, one paying zero because she vested before 1989, the other paying full freight because he started in 1990. The cutoff date is unforgiving, and it does not move, which is why some North Carolina retirees treat August 12, 1989 as the single most important date in their tax life.

A worked example shows the stakes. Take a retired North Carolina state employee receiving a $60,000 annual pension who had eight years of creditable service before August 12, 1989. Under Bailey, that entire $60,000 is excluded from North Carolina taxable income, so the state income tax on it is $0. Now take a private-sector retiree drawing $60,000 from a 401(k) with no Bailey-qualifying plan. That $60,000 is fully taxable, producing state income tax of about $2,550 at the 4.25% rate. Same dollar amount, same flat rate, but a $2,550 annual difference driven entirely by the source and timing of the retirement plan. Over a 20-year retirement, that’s roughly $51,000, enough to fund a couple of years of a comfortable lifestyle.

For retirees who don’t qualify for Bailey, North Carolina taxes pensions, traditional IRA withdrawals, 401(k) and 403(b) distributions, and annuity income at the flat rate, just like wages. Roth IRA qualified distributions are not taxable because they aren’t taxable federally either, since North Carolina starts from federal AGI. Military retirement is fully deductible in North Carolina under current law for many veterans, which overlaps with but is broader than the Bailey treatment, so military retirees should check both provisions. The interaction between federal taxation and North Carolina taxation matters because North Carolina taxable income flows from federal AGI, so anything excluded federally is generally excluded for North Carolina too, while anything taxed federally is generally taxed by North Carolina unless a specific state deduction like Bailey applies.

A common mistake is assuming all government pensions are Bailey-exempt. They’re not; only those where the retiree met the five-year service requirement by August 12, 1989, qualify. Another mistake is failing to claim the Bailey deduction on Schedule S when eligible, simply paying tax on income that should have been excluded, which means overpaying the state income tax year after year. A third is rolling a Bailey-qualifying account into a non-qualifying plan, which can cause the funds to lose their exempt character, so retirees with Bailey benefits should be careful before doing rollovers. We help retirees sort out which benefits qualify and plan distributions accordingly in our tax strategy consulting service, because getting this wrong is costly and getting it right is worth thousands a year.

The forward-looking takeaway on retirement income and the state income tax is that the state is genuinely retiree-friendly on Social Security and on Bailey-qualified government pensions, but ordinary 401(k) and IRA income is fully taxable at 4.25%. If you’re a government retiree, confirm whether you met the August 12, 1989 service threshold, because that single fact can eliminate your North Carolina tax on the pension entirely. If you’re a private-sector retiree, plan your withdrawals knowing they’ll be taxed at the flat rate, and consider how the timing of distributions affects your North Carolina taxable income year to year. This is general information, not tax advice; confirm your eligibility with NCDOR and a licensed CPA before relying on the Bailey exclusion, because the qualification rules are specific and the documentation, a copy of your Form 1099-R, must be attached to the return.

Part-year residents and nonresidents handle state income tax by filing Form D-400 together with Schedule PN, computing tax as if all their income were taxable in North Carolina, then prorating that tax down to the share of income that is actually connected to North Carolina. The result is that you only pay North Carolina state income tax on your North Carolina-source income or on income earned while you were a resident, not on your entire year’s earnings. The North Carolina Department of Revenue covers these rules in the Form D-400 and Schedule PN instructions on its forms and instructions page.

First, the definitions. A part-year resident is someone who moved into or out of North Carolina during the tax year, so they were a North Carolina resident for part of the year and a resident of another state for the rest. A nonresident is someone who lived in another state the entire year but earned income from North Carolina sources, such as wages for work physically performed in North Carolina, income from a business operating in North Carolina, or rent from North Carolina property. Both file Form D-400 with Schedule PN, and both use the proration method, but the income that counts as North Carolina income differs based on their status and on where the income-producing activity actually took place.

The proration mechanic is the heart of it. You report your total income from all sources to compute a base North Carolina tax as if you were a full-year resident. Then you calculate the percentage of your income that is from North Carolina sources or earned during North Carolina residency, and you apply that percentage to the base tax. So if 40% of your income is connected to North Carolina, you pay 40% of the full-year tax figure. This method ensures North Carolina taxes its fair share of your income at the proper effective rate without taxing income that has nothing to do with the state. It also means your North Carolina effective rate reflects your total income level, even though you only pay on the North Carolina slice.

A worked example for a part-year resident makes it concrete. Suppose you lived in Ohio from January through June, then moved to Charlotte in July and lived in North Carolina for the rest of 2025. Your total annual income is $80,000, of which $45,000 was earned after your move to North Carolina. You’d file Form D-400 with Schedule PN, compute a base tax on the full $80,000 (after the standard deduction), and then prorate so North Carolina taxes only the portion tied to your North Carolina residency period. The income earned while you were an Ohio resident is reported to Ohio, not taxed by North Carolina, while your North Carolina state income tax applies to the $45,000 earned after the move. You file two part-year returns that year, one in each state, each covering its own slice.

A nonresident example works similarly. Imagine you live in Tennessee, which has no income tax, but you spent two months on a construction project in Asheville earning $28,000 of North Carolina-source wages. You’d file a North Carolina nonresident return on Form D-400 with Schedule PN, report your total income to find the base tax, and prorate so North Carolina taxes only the $28,000 of North Carolina-source wages. You owe North Carolina state income tax on that $28,000 even though you never lived in North Carolina, because North Carolina taxes income earned from work physically performed within its borders. Your Tennessee residency doesn’t shield North Carolina-source income from North Carolina tax, and because Tennessee has no income tax of its own, you can’t offset the North Carolina tax with a home-state credit.

The credit for taxes paid to another state is what prevents double taxation, and it’s essential for anyone with multi-state income. If you’re a North Carolina resident who paid income tax to another state on the same income, you can generally claim a credit on your North Carolina return for the tax paid to that other state, up to the amount North Carolina would have charged. This stops the same dollars from being taxed twice. The credit usually flows in the direction of your resident state giving you relief for tax paid to the nonresident state. Sorting out which state taxes what, and who gives the credit, is exactly the kind of multi-state question we handle in our individual tax return service, and it’s where do-it-yourself filers most often leave money on the table.

Withholding adds another layer. North Carolina employers withhold state income tax from wages, so if you worked in North Carolina as a nonresident, your employer likely withheld North Carolina tax that you reconcile when you file. If you’re self-employed or have North Carolina income without withholding, North Carolina expects quarterly estimated payments, and underpaying can trigger interest. Part-year residents who had North Carolina tax withheld during their residency period claim that withholding on their D-400, and any over-withholding comes back as a refund once the proration is applied. Getting your withholding to match your actual proration is the difference between a clean refund and an unexpected balance due.

The common mistakes here are predictable and avoidable. The first is a part-year resident or nonresident reporting only their North Carolina income on the base tax calculation instead of all income, which throws off the proration and usually understates the effective rate North Carolina is entitled to. The second is forgetting to claim the credit for taxes paid to another state, leaving the same income taxed twice. The third is a nonresident assuming North Carolina has no claim on their income at all, then receiving a notice for unfiled returns on North Carolina-source earnings. And the fourth is mishandling residency itself, since establishing or ending North Carolina residency depends on facts like where you live, where you’re registered, and your intent. We compare how residency rules play out across states in our state tax questions guide.

The forward-looking takeaway is that part-year and nonresident state income tax always runs through Form D-400 and Schedule PN, always uses the report-everything-then-prorate method, and always pairs with the credit for taxes paid to another state when the same income is taxed by two jurisdictions. If you moved during the year or earned money in North Carolina while living elsewhere, expect to file in more than one state and to use the proration and credit mechanics to land at the right total. This is general information, not tax or legal advice; multi-state returns get complicated fast, so confirm sourcing and residency rules with NCDOR and consult a licensed CPA before filing, because errors on Schedule PN and the out-of-state credit are common and can cost you real money on both returns.