State estimated tax — 2026

North Carolina Estimated Tax Payments 2026

Who has to make North Carolina quarterly estimated payments, the 2026 due-date calendar, the safe-harbor rules that avoid an underpayment penalty, and how to pay through NC-40 Online (eServices).

Who must pay

North Carolina requires Form NC-40 payments once the tax due on your 2026 return — after subtracting NC withholding and credits — will be $1,000 or more. There’s no separate gross-income trigger for the estimated-tax rule itself; it’s purely the $1,000 net-liability test.

2026 due-date calendar

Installment	% of annual estimate	Due date	Note
Q1	25%	April 15, 2026	—
Q2	25%	June 15, 2026	—
Q3	25%	September 15, 2026	—
Q4	25%	January 15, 2027	—

North Carolina uses four equal 25% installments, due the 15th day of the 4th, 6th and 9th months and the following year’s 1st month for calendar-year filers; any date landing on a weekend or holiday rolls to the next business day. Farmers and fishermen (at least two-thirds of gross income from farming, oyster farming, or commercial fishing) use a 66⅔% current-year safe-harbor percentage instead of 90%, and can skip installments entirely by paying in full by January 15 or by filing and paying the complete D-400 by March 1 — enter exception code “E” on Line 26e to avoid an automatic underpayment assessment. Everyone else can also skip the January 15 installment if they file and pay their full balance by January 31.

Safe harbor — avoiding the underpayment penalty

North Carolina clears the underpayment penalty once your four installments each cover a quarter of whichever figure lands lowest: 90% of what your 2026 return will actually show (66⅔% for qualifying farmers and fishermen), the total from a complete twelve-month 2025 D-400, or 90% of tax worked out under the annualized-income method on Form D-422A. There’s no premium for high earners built into this test — a taxpayer clearing $40,000 and one clearing $4 million satisfy it identically, with nothing resembling the AGI-triggered add-on several neighboring states layer on above a set income line.

How to calculate your payment

Estimate your annual North Carolina tax, test it against the safe harbor above, then split the required annual payment across the installments in the calendar. The site's quarterly planner handles the math and the federal side together.

Open the quarterly estimated tax calculator → Check your underpayment penalty exposure →

How to pay

Pay online through NC-40 Online (eServices), or mail a check or money order with the Form NC-40 voucher.

Penalty basics

North Carolina computes underpayment interest using a rate the Secretary of Revenue sets every six months under G.S. §105-241.21. The rate is 7% annually for both halves of 2026 (unchanged from 2025), applied as days-late ÷ 365 × 7% × the underpayment on Form D-422.

North Carolina-specific notes

North Carolina’s flat rate drops to 3.99% for 2026 (from 4.25% in 2025) under the Session Law 2023-134 phase-down — and the schedule allows further cuts in future years if state revenue triggers are met.
North Carolina holds every filer to the identical 90%/100% comparison no matter their income — nothing here escalates the way an AGI-triggered high-earner surcharge does in several nearby states.
Owners of a pass-through entity that makes North Carolina’s “Taxed PTE” election can leave their share of that entity’s income out of their own NC estimated-tax calculation without owing estimated-tax interest on it, as long as the entity’s election is valid.
No North Carolina-specific mandatory e-pay threshold for individual estimated tax was found in DOR guidance — the state’s general electronic-payment compulsion statute (G.S. §105-241) targets taxpayers whose average monthly liability for a given tax runs $20,000 or more, a bar aimed at business filers.

See the North Carolina 2026 tax brackets for current rates, or the North Carolina state tax calculator to estimate your full-year liability.

Frequently asked questions

When are North Carolina estimated tax payments due in 2026?

The four North Carolina due dates for 2026 are April 15, 2026, June 15, 2026, September 15, 2026, January 15, 2027. North Carolina uses four equal 25% installments, due the 15th day of the 4th, 6th and 9th months and the following year’s 1st month for calendar-year filers; any date landing on a weekend or holiday rolls to the next business day. Farmers and fishermen (at least two-thirds of gross income from farming, oyster farming, or commercial fishing) use a 66⅔% current-year safe-harbor percentage instead of 90%, and can skip installments entirely by paying in full by January 15 or by filing and paying the complete D-400 by March 1 — enter exception code “E” on Line 26e to avoid an automatic underpayment assessment. Everyone else can also skip the January 15 installment if they file and pay their full balance by January 31.

Is North Carolina’s safe harbor stricter for high earners?

No. North Carolina holds every filer — regardless of how much they earn — to the identical 90% (current-year) or 100% (prior-year) comparison; nothing escalates once income crosses a particular line, unlike the AGI-triggered surcharge several nearby states apply to their highest earners.

Is North Carolina’s flat tax rate still falling in 2026?

Yes. The rate is 3.99% for tax years beginning on or after January 1, 2026, down from 4.25% in 2025, under the multi-year phase-down enacted in Session Law 2023-134. The law allows further reductions in later years if the state hits specified revenue triggers.

What’s the special rule for North Carolina farmers and fishermen?

North Carolina farmers and commercial fishermen who draw two-thirds or more of their gross income from that work get a lower 66⅔% current-year bar instead of 90%, plus the option to skip the quarterly schedule altogether: pay everything by January 15, or file and settle the complete D-400 by March 1.

How do I pay North Carolina estimated tax?

Pay online through NC-40 Online (eServices), or mail a check with the Form NC-40 voucher.

Estimated tax in other states

Compare how North Carolina stacks up against the other states with a Rising search trend for estimated-tax rules.