What Is a Quarterly Tax Payment and How Does It Work?

Quarterly tax payments are four installments of federal income tax you send the IRS during the year on income that isn’t already being withheld by an employer. The U.S. tax system runs on a pay-as-you-go basis, so tax is owed as income is earned. If you expect to owe at least $1,000 in federal tax for the year after subtracting withholding and credits, the IRS expects you to send estimated payments on that income four times a year.¹

Who Has to Pay

The $1,000 threshold covers most sole proprietors, freelancers, partners in a partnership, and S corporation shareholders.¹ It also reaches anyone with meaningful income that isn’t subject to withholding: interest, dividends, capital gains, rental income, and prizes all count.² Corporations have a lower bar: a corporation must make estimated payments if it expects to owe at least $500.

Having a W-2 job doesn’t automatically get you out of it. If your paycheck withholding won’t cover the tax on side income from freelancing, rentals, or investments, you have two options: ask your employer to withhold more from your wages, or start sending quarterly payments on the difference.²

Married couples can send joint estimated payments as long as they plan to file a joint return. You can’t file joint estimated payments if either spouse is a nonresident alien, if you’re separated under a divorce or separate maintenance decree, or if you and your spouse have different tax years.³

The Four Due Dates

The deadlines aren’t spaced evenly. Each covers a different slice of the year:⁴

April 15, for income earned January 1 through March 31.
June 15, for income earned April 1 through May 31. That’s a two-month window, and it catches people off guard.
September 15, for income earned June 1 through August 31.
January 15 of the following year, for income earned September 1 through December 31.

When a due date lands on a weekend or federal holiday, it shifts to the next business day automatically. You don’t have to file anything to get that extra time; just pay by the adjusted date.⁴

Figuring Out How Much to Pay

Form 1040-ES includes a worksheet that walks through the calculation.⁵ Start with your expected adjusted gross income for the year, subtract the standard deduction or your anticipated itemized deductions, and apply the current tax brackets. Last year’s return is usually the best starting point, since most of the inputs recur.

Self-employment income adds another layer. The combined self-employment tax rate is 15.3%, made up of 12.4% for Social Security and 2.9% for Medicare. For 2026, the Social Security portion applies only to the first $184,500 of net self-employment earnings.⁶ You can deduct half of your self-employment tax when figuring your adjusted gross income, which lowers the income-tax side of the calculation; a lot of self-employed people miss this and overestimate what they owe.⁷

Higher earners have an extra piece to account for. An additional 0.9% Medicare tax applies to self-employment earnings above $200,000, or $250,000 for married couples filing jointly.⁸ Fold it into your estimated payments so you don’t come up short.

Once you have a total for the year, divide it into four equal installments. If your income is uneven, which is common for seasonal workers, consultants, and anyone with a big capital gain late in the year, you can use the annualized income installment method instead. It bases each payment on what you actually earned during that specific period. If you use it, file Form 2210 with Schedule AI along with your annual return, even if you end up owing no penalty.³

Safe Harbors That Keep You Out of Penalty Territory

You don’t have to hit your actual tax bill on the nose. You avoid the underpayment penalty if you meet any of these:⁹

The gap between your total tax and your withholding plus estimated payments is under $1,000.
Your payments covered at least 90% of what you actually owe for the current year.
Your total payments equal or exceed the tax shown on your prior year’s return.

The prior-year rule is the one most people rely on, because it takes the guessing out of the current year. There’s a catch for higher earners: if your adjusted gross income last year was above $150,000, or $75,000 if married filing separately, the threshold rises to 110% of the prior year’s tax.¹⁰

How to Send the Payment

The IRS offers several ways to pay, and they differ mostly on cost and convenience.

IRS Direct Pay

Direct Pay moves money from a checking or savings account for free, with no registration.¹¹ Choose “Estimated Tax” as the reason for payment so the IRS credits the right year. You get an electronic confirmation right away. For most individuals, this is the simplest option.

EFTPS

The Electronic Federal Tax Payment System lets you schedule payments up to 365 days ahead and pull a history of your federal deposits.¹² One important change: the IRS no longer accepts new individual enrollments. Existing individual accounts still work, but new individual taxpayers are directed to Direct Pay or their IRS Online Account. Business taxpayers can still enroll.

Credit or Debit Card

IRS-authorized third-party processors accept card payments, but they charge for it. Credit card fees run roughly 1.75% to 1.85% of the payment, with a minimum of $2.50. Debit card payments are a flat fee of about $2.10 to $2.15 per transaction.¹³ Those percentages add up quickly on a large estimated payment.

Mail

You can send a check or money order with the payment vouchers included in the 1040-ES packet. Each voucher needs your Social Security number and the tax year on it. The mailing address depends on your state and is listed in the form instructions. Keep a copy of the voucher and proof of mailing.

Whichever method you use, hold on to every confirmation number and cleared-transaction record. Discrepancies between what you report on your return and what the IRS shows on file can trigger processing delays or correction notices.¹⁴

If You Pay Too Little

The underpayment penalty is essentially interest on the shortfall, compounded daily. For the first quarter of 2026, the rate for individuals is 7% per year.¹⁵ The rate adjusts quarterly with the federal short-term rate and can move up or down during the year.⁹

The penalty applies separately to each installment, so a shortfall in April costs more than the same shortfall in September because interest runs longer. The IRS usually calculates it and sends a bill. You can also work it out yourself on Form 2210, which is where the annualized installment method can shrink the number.

Waivers are available in narrow situations. If you retired after reaching age 62 or became disabled and the underpayment was due to reasonable cause rather than neglect, you can request a waiver by checking the box on Form 2210 and attaching documentation such as proof of your retirement date.¹⁶ The IRS can also waive the penalty when a casualty, disaster, or other unusual circumstance made the underpayment unavoidable. In federally declared disaster areas, the IRS typically applies relief automatically based on your county, without a Form 2210 request.

If You Pay Too Much

If your estimated payments end up exceeding your actual tax for the year, you can take the extra as a refund or apply it as a credit toward next year’s estimated tax.¹⁴ Applying it forward is handy if you expect similar income next year, because it gives you a head start on your first installment. Track how much you rolled forward, since you’ll need that figure to check whether next year’s payments meet the safe harbor thresholds.

Farmers and Fishermen

If at least two-thirds of your gross income comes from farming or fishing, you’re on a different schedule: one estimated payment due January 15 of the following year instead of four.¹⁷ You can also skip estimated payments entirely by filing your return and paying the full balance by March 1. That March 1 date is strict. Miss it and you lose the exemption and may face the standard underpayment penalty.

State Quarterly Payments

Federal payments are only half the picture. Most states with an income tax also require estimated payments on a similar schedule, but the rules vary. Thresholds that trigger a state payment requirement range from as low as $100 to as high as $1,000, and a handful of states don’t require quarterly payments at all. Check your state tax agency’s website for the specific threshold, due dates, and forms; the state schedule doesn’t always match the federal one.

1
Internal Revenue Service. Estimated Taxes
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Internal Revenue Service. Interest Rates Remain the Same for the First Quarter of 2026
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