How this calculator works
Enter your filing status, yearly income, the federal tax withheld from your paychecks and the number of qualifying children. The calculator subtracts the 2026 federal standard deduction, runs the rest of your income through the federal brackets, takes off the child tax credit, and then separately applies North Carolina’s standard deduction and 3.99% flat rate. Everything runs in your browser — nothing you type is sent anywhere.
How federal tax brackets work
Federal income tax is progressive: your income is split into layers and each layer has its own rate, from 10% to 37%. Moving into a higher bracket only raises the rate on the dollars above that line, not on all of your income. For a single filer in 2026 the 10% bracket covers the first $12,400 of taxable income, 12% covers income up to $50,400, and 22% covers income up to $105,700. That is why your effective rate (total tax ÷ income) is always lower than your top bracket. For a full bracket breakdown with itemized deductions and other credits, see our federal income tax calculator.
The standard deduction
The standard deduction is a fixed amount of income that is not taxed at all. For 2026 the federal standard deduction is $16,100 for single filers, $32,200 for married couples filing jointly and $24,150 for heads of household. North Carolina has its own, smaller standard deduction: $12,750 single, $25,500 married filing jointly and $19,125 head of household. Because NC’s deduction is smaller, your NC taxable income is usually higher than your federal taxable income.
North Carolina’s flat income tax
North Carolina does not use brackets. Every dollar of NC taxable income is taxed at the same rate, which is 3.99% for 2026. The math is simple: NC tax = (income − NC standard deduction) × 3.99%. For example, a single filer earning $75,000 has $62,250 of NC taxable income and about $2,484 of NC tax. The same person owes about $7,670 in federal tax, for a combined effective rate of roughly 13.5%.
Refund or amount owed
Your refund estimate compares the federal tax withheld from your pay with the federal tax calculated here. If more was withheld than you owe, the difference comes back as a refund; if less, you would owe the difference when you file. NC withholding is tracked separately on your pay stub and is not included in this comparison. To see how taxes affect each paycheck, try the paycheck calculator.
What this estimate leaves out
This is a simplified estimate. It assumes the standard deduction, treats all income as ordinary wages, and caps the child tax credit at your federal tax (it ignores the refundable portion and income phase-outs). It does not include Social Security and Medicare taxes, self-employment tax, capital gains rates, retirement contributions, other credits, NC adjustments, or newer federal deductions such as those for tips, overtime and seniors. Use it for planning, and use tax software, the IRS or the NC Department of Revenue for your actual return.
Frequently asked questions
What is the North Carolina income tax rate for 2026?
North Carolina has a flat individual income tax rate of 3.99% for 2026. Every filer pays the same rate on NC taxable income.
Does North Carolina have a standard deduction?
Yes. For 2026 it is $12,750 for single filers, $25,500 for married filing jointly and $19,125 for head of household. It is smaller than the federal standard deduction.
Does a higher tax bracket mean all my income is taxed more?
No. Only the part of your income above each bracket threshold is taxed at the higher rate. A raise always leaves you with more money after tax.
How is the child tax credit handled?
The calculator subtracts $2,200 per qualifying child under 17 from your federal tax, but never below zero. The real credit can be partly refundable and phases out at higher incomes, so treat this as a simplified estimate.
Is this tax advice?
No. This is a free estimate for educational purposes only and is not tax, legal or financial advice. Your actual tax depends on your full situation; check with the IRS, the NC Department of Revenue or a qualified tax professional before filing.
Results are estimates for educational purposes only and are not financial, tax, legal or medical advice. See our disclaimer. Last reviewed 2026-10-22.