Who Is Required to Make Estimated Tax Payments?

You are required to make estimated tax payments if you expect to owe at least $1,000 in federal income tax for 2026 after subtracting withholding and refundable credits. For C corporations, the trigger is just $500. The federal system runs on pay-as-you-go, so tax is due as income is earned, and the IRS charges an interest-based penalty on each late installment even when your annual return ultimately shows a refund.

Individuals and Self-Employed Taxpayers

The requirement reaches sole proprietors, partners, S corporation shareholders, and anyone else who receives income without tax withheld at the source. Under federal law, you owe estimated payments if you expect your total tax for the year, minus withholding and credits, to be $1,000 or more.¹ Income that commonly pushes people over that line includes freelance earnings, rental income, interest, dividends, capital gains, and alimony.²

Self-employed taxpayers cross the threshold fastest. On top of regular income tax, they owe self-employment tax covering Social Security and Medicare. An employer normally pays half of those payroll taxes, but when you work for yourself, you pay both halves.³ Even a modest net profit can produce enough combined tax to require quarterly payments.

Household employers count too. If you employ a nanny, housekeeper, or similar worker, the household employment taxes you report on Schedule H factor into whether you owe estimated payments.⁴

When You Don’t Have to Pay

Two exceptions keep many people with non-wage income out of the quarterly system.

If you had zero tax liability for the prior year, were a U.S. citizen or resident for the entire year, and that return covered a full 12 months, you are exempt from the estimated tax penalty for the current year.¹ This matters most for people who just started a business or side gig. If your 2025 return showed no tax owed, you won’t face a penalty in 2026 no matter what you earn this year. The obligation kicks in the year after.

The second exception is practical rather than legal. If you also draw a paycheck from a job, you can skip quarterly filings by raising your W-4 withholding at work. The W-4 has a dedicated line for extra withholding per paycheck, and the IRS specifically points self-employed sidelines toward this option.⁵ From the IRS’s perspective, withholding and estimated payments are interchangeable. Bump your withholding enough to cover the side income and the pay-as-you-go rule is satisfied.

C Corporations

C corporations must make estimated payments when the expected tax for the year reaches $500 or more.⁶ The threshold looks at the corporation’s own tax liability after deductions, not gross revenue. Pass-through entities, meaning S corporations and most LLCs, generally don’t owe estimated tax at the entity level because their shareholders or members handle it on their personal returns.

The IRS retired the standalone Form 1120-W after 2022. Corporations now figure each installment using the Estimated Tax Worksheet in the instructions for their income tax return.⁷

Estates and Trusts

Estates and trusts follow the same $1,000 threshold as individuals. An estate or trust must pay estimated tax if it expects to owe at least $1,000 after credits and withholding, and those credits and withholding fall short of the lesser of 90 percent of the current year’s tax or 100 percent of the prior year’s tax.⁸ A decedent’s estate is exempt from estimated tax payments for any tax year ending within two years of the date of death.

Farmers and Fishermen

If at least two-thirds of your gross income for 2025 or 2026 comes from farming or fishing, the standard quarterly schedule doesn’t apply to you. You have two options instead:⁹

Pay the full estimated tax in a single installment by January 15, 2027.
File your 2026 return and pay the entire balance by March 1, 2027, in which case no estimated payment is required at all.

Farmers and fishermen also get a more forgiving safe harbor. The 90-percent-of-current-year threshold drops to 66⅔ percent.¹⁰

The Safe Harbor That Keeps You Compliant

Your estimates don’t need to be perfect. The IRS won’t charge an underpayment penalty as long as your total withholding and estimated payments for the year reach at least the smaller of:¹⁰

90 percent of the tax shown on your 2026 return, or
100 percent of the tax shown on your 2025 return, provided that return covered a full 12 months.

The prior-year method is the safer bet when your income is rising, because it fixes your target no matter how well the current year goes. Higher earners face a stricter version. If your 2025 adjusted gross income exceeded $150,000 (or $75,000 if married filing separately), you must pay 110 percent of the prior year’s tax instead of 100 percent.¹¹ That 10-percentage-point jump catches a lot of high earners off guard. They match last year’s tax, assume they’re safe, and get billed for the shortfall.

Income that lands unevenly across the year, such as a large late-year capital gain or seasonal business receipts, can distort the standard equal-quarterly approach. The annualized income installment method, reported on Schedule AI of Form 2210, lets you calculate each quarter’s required payment based on income actually received through that period.¹⁰ If you use it for one payment period, you must use it for all four.

2026 Quarterly Deadlines

If you fall into the required group, the tax year splits into four uneven payment periods:¹²

Q1 (January 1 – March 31): April 15, 2026
Q2 (April 1 – May 31): June 15, 2026
Q3 (June 1 – August 31): September 15, 2026
Q4 (September 1 – December 31): January 15, 2027

When a due date falls on a Saturday, Sunday, or legal holiday, the payment is timely if made the next business day.¹³ The gap between Q1 and Q2 is only about two months, which surprises first-time filers.

State Estimated Tax

Federal rules are only half the picture. Most states with an income tax have their own estimated payment requirements, and the thresholds are often lower than the federal $1,000, generally falling between $100 and $1,000 of expected tax due after withholding. Deadlines usually match the federal schedule but not always. Check your state tax agency for the exact trigger, dates, and any safe harbor that differs from the federal version. A missed state payment produces its own penalty on top of anything the IRS charges.

1
Office of the Law Revision Counsel. 26 U.S.C. 6654 – Failure by Individual to Pay Estimated Income Tax
2
Internal Revenue Service. About Form 1040-ES, Estimated Tax for Individuals
3
Internal Revenue Service. Self-Employed Individuals Tax Center
4
Internal Revenue Service. Instructions for Schedule H
5
Internal Revenue Service. Estimated Taxes
6
Office of the Law Revision Counsel. 26 U.S.C. 6655 – Failure by Corporation to Pay Estimated Income Tax
7
Internal Revenue Service. Publication 542, Corporations
8
Internal Revenue Service. Instructions for Form 1041 (2025)
9
Internal Revenue Service. Farmers and Fishermen
10
Internal Revenue Service. Instructions for Form 2210 (2025)
11
Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty
12
Internal Revenue Service. Individuals 2 – When Are Quarterly Estimated Tax Payments Due
13
Internal Revenue Service. Employment Tax Due Dates