How to Prepay Federal Taxes and Avoid Penalties

To prepay your federal taxes, send the IRS money during the year through either paycheck withholding or quarterly estimated tax payments made with Form 1040-ES or an electronic payment method. If you expect to owe $1,000 or more after subtracting withholding and refundable credits, quarterly payments are generally required, and hitting one of the IRS safe harbors is what keeps you out of penalty territory.

Do You Actually Need to Prepay

The federal system is pay-as-you-go. Employees usually handle it through withholding without thinking about it. If you have income that isn’t withheld on, such as self-employment earnings, freelance or gig work, rental income, investment gains, or retirement distributions, the responsibility to pay in during the year shifts to you.

The trigger is dollar-specific. If the total tax on your return minus your withholding and refundable credits comes to less than $1,000, no penalty applies for skipping estimated payments.¹ At $1,000 or more, the IRS expects quarterly installments.

There is also a full pass for last year: if you had zero tax liability on a prior-year return that covered a full 12 months and you were a U.S. citizen or resident for all of it, you owe nothing in estimated payments this year regardless of what you make.¹

The Safe Harbors That Keep You Penalty-Free

You don’t have to predict this year’s tax perfectly. You just have to hit one of two targets:

Pay at least 90% of what you’ll actually owe on this year’s return, or
Pay 100% of what your prior-year return showed, provided that return covered a full 12 months.¹

The IRS uses whichever of those two numbers is smaller as your required annual payment and expects it in four equal installments.

One catch trips up higher earners. If your adjusted gross income on last year’s return was more than $150,000 (or $75,000 if married filing separately), the prior-year safe harbor rises from 100% to 110%.¹ If you’re anywhere near that line, confirm which percentage applies before you fix your payment amount.

Withholding vs. Quarterly Estimates

If you also have a W-2 job or a pension, you don’t have to use estimated payments at all. You can file a new Form W-4 with your employer asking for extra withholding, and the IRS specifically recommends this option for people with self-employment, gig, or rental income on the side.²

Withholding has a real advantage: the IRS treats every dollar withheld as paid evenly across the year no matter when it actually left your paycheck. Ramp up withholding in December and it counts as though you’d been paying since January. That flexibility makes withholding the cleaner fix for anyone who realizes late in the year that they’re short. The IRS Tax Withholding Estimator on irs.gov can help you land on the right W-4 number.

Figuring Out How Much to Pay

The Estimated Tax Worksheet inside the Form 1040-ES instructions walks through the calculation.³ The steps:

Project your adjusted gross income for the year: wages, freelance income, investment returns, rental income, retirement distributions, minus above-the-line deductions like HSA contributions and student loan interest.
Subtract the standard deduction or your projected itemized deductions to get taxable income.
Apply the federal tax brackets to find your base income tax.
Subtract credits you expect to claim, such as the Child Tax Credit or the Earned Income Tax Credit.
If you’re self-employed, add self-employment tax for Social Security and Medicare.
Subtract expected withholding from wages or pensions.

What’s left is what estimated payments need to cover. Divide by four for each quarterly installment.³ Having last year’s return in front of you helps, both for projecting figures and for running the safe harbor comparison.

You can also pay the whole year’s estimated tax in a single lump on the first-quarter due date if you’d rather not track four deadlines.³

When Your Income Isn’t Even Across the Year

Four equal installments assume income arrives at a steady pace. It often doesn’t. A freelancer who books most of the year’s work in the fall, or an investor who sells appreciated stock in November, would be overpaying the early quarters under the flat approach.

The annualized income installment method lets you base each quarterly payment on income actually earned through that point in the year. You calculate for the cumulative periods (January through March, January through May, January through August, and the full year), then annualize each and figure the installment owed. This runs on Schedule AI of Form 2210.⁴ If you use the annualized method for one period, you have to use it for all four; picking and choosing isn’t allowed.

When Payments Are Due

For calendar-year taxpayers, the four due dates for 2026 estimated payments are:

First quarter: April 15, 2026
Second quarter: June 15, 2026
Third quarter: September 15, 2026
Fourth quarter: January 15, 2027

These are set by statute and shift only if a date falls on a weekend or a legal holiday in the District of Columbia, in which case the deadline moves to the next business day.⁵ For 2026, none of the four dates land on a weekend or D.C. holiday, so no adjustments apply. Mailed payments are on time by postmark date; electronic payments by confirmation timestamp.

If your tax year isn’t the calendar year, your installments are due on the 15th day of the 4th, 6th, and 9th months of your fiscal year, plus the 15th day of the 1st month after it ends.⁵

Farmers and fishermen get a separate schedule. If at least two-thirds of your 2026 gross income comes from farming or fishing, you make one estimated payment on January 15, 2027, instead of four quarterly ones. Even that single payment can be skipped if you file your return and pay in full by March 1, 2027.⁶

How to Send the Payment

Several IRS-approved channels are available. Electronic options are faster and generate an automatic record, which matters if the IRS ever questions whether a payment arrived on time.

IRS Direct Pay

Direct Pay is a free transfer from your checking or savings account to the IRS. No account or registration is required.⁷ Choose “estimated tax” as the payment type, enter your bank details, and save the confirmation. Scheduled payments can be changed or canceled up to two business days before the payment date.⁸

IRS Online Account

An IRS Online Account handles estimated payments alongside your full payment history and any balance owed.⁹ It requires ID.me verification, which takes some setup, but gives you one place for your tax records.

EFTPS

The Electronic Federal Tax Payment System is a free Treasury service that lets you schedule payments up to 365 days ahead and view 15 months of history.¹⁰ Enrollment mails credentials to you, so sign up well ahead of your first deadline. EFTPS suits people with multiple tax obligations or those whose tax preparer submits payments for them.

Debit Card, Credit Card, or Digital Wallet

Two third-party processors, Pay1040 and ACI Payments, Inc., accept card payments and digital wallets (PayPal, Click to Pay, and, through ACI, Venmo). They charge convenience fees the IRS does not receive: a flat fee of a couple of dollars for debit cards and roughly 1.75% to 1.85% for credit cards, with a $2.50 minimum.¹¹ Unless card rewards clearly exceed the fee, this is the most expensive option.

Mail

You can mail a check or money order with the Form 1040-ES voucher for that quarter. Make it payable to “United States Treasury” and write your SSN, the tax year, and “Form 1040-ES” on the check.³ The correct IRS address depends on your state and is listed in the 1040-ES instructions. Certified mail gives you a dated receipt in case timeliness is ever questioned.

What Happens If You Underpay

The IRS computes the underpayment penalty separately for each installment period, not once at year end. If a quarterly payment is short, the penalty starts running from that installment’s due date and continues until either the shortfall is paid or the April filing deadline arrives, whichever comes first.⁴ The rate equals the IRS underpayment interest rate, which for the first quarter of 2026 is 7% per year, compounded daily.¹² That rate resets quarterly.

Two features surprise people. First, the penalty can still apply even if you’re getting a refund at filing time, because a refund at year end doesn’t undo a late installment during the year. Second, catch-up payments are applied to the earliest outstanding underpayment first, regardless of what you write on the payment.⁴

Penalty Waivers

The IRS has discretion to waive the penalty if a casualty, disaster, or other unusual circumstance made imposing it inequitable.¹ It can also be waived for taxpayers who retired after reaching age 62, or who became disabled, during the tax year or the year before, if the underpayment was due to reasonable cause rather than willful neglect. Waivers are not automatic; request them by filing Form 2210 with your return.

If You End Up Overpaying

If your payments and withholding add up to more than your final tax bill, your Form 1040 lets you take the excess as a refund or apply it forward to next year’s estimated tax. Applying it forward reduces your first quarterly installment for the following year by the amount you carry over.

1
Office of the Law Revision Counsel. 26 USC 6654 – Failure by Individual to Pay Estimated Income Tax
2
Internal Revenue Service. Pay as You Go, So You Won’t Owe
3
Internal Revenue Service. 2026 Form 1040-ES Estimated Tax for Individuals
4
Internal Revenue Service. 2025 Instructions for Form 2210
5
Internal Revenue Service. Publication 509 (2026), Tax Calendars
6
Internal Revenue Service. Farmers and Fishermen
7
Internal Revenue Service. Direct Pay Help
8
Internal Revenue Service. Direct Pay with Bank Account
9
Internal Revenue Service. Payments
10
Internal Revenue Service. EFTPS: The Electronic Federal Tax Payment System
11
Internal Revenue Service. Pay Your Taxes by Debit or Credit Card or Digital Wallet
12
Internal Revenue Service. Interest Rates Remain the Same for the First Quarter of 2026