To change your estimated tax payments, recalculate what you owe for the year using the worksheet in the Form 1040-ES instructions, then send the new amount with your next quarterly payment through IRS Direct Pay, your IRS Online Account, or a mailed 1040-ES voucher. There’s no form to amend a payment you’ve already made; you simply submit a different dollar figure going forward. The sooner you adjust after your income changes, the less penalty exposure you carry, because the IRS calculates underpayment interest quarter by quarter at 7% per year for the first quarter of 2026.1Internal Revenue Service. Interest Rates Remain the Same for the First Quarter of 2026
When a Mid-Year Change Is Worth Making
The IRS expects estimated payments from anyone who will owe $1,000 or more after subtracting withholding and refundable credits.2Internal Revenue Service. Estimated Taxes If your projected tax bill has moved, your payments should move with it.
Common reasons to adjust: a big jump or drop in business revenue, a new client, a new W-2 job that adds withholding, a large capital gain or loss, marriage or divorce, or losing a deduction like mortgage interest. If the change pushes your expected bill below $1,000, you can reduce or stop payments entirely. If it pushes the bill up, waiting means the shortfall compounds through each quarter you underpay.
You don’t file anything to make the switch. Send a different amount with your next voucher or electronic payment, and that becomes your new installment.
Recalculating the New Amount
The IRS publishes a worksheet inside the Form 1040-ES instructions for exactly this purpose.3Internal Revenue Service. About Form 1040-ES, Estimated Tax for Individuals Estimate your adjusted gross income for the full year, subtract expected deductions and credits, and apply the tax rate schedule for your filing status.
If you’re self-employed, layer in self-employment tax. The combined rate is 15.3% of net self-employment earnings — 12.4% Social Security and 2.9% Medicare.4Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes) For 2026, Social Security tax applies only to the first $184,500 of combined wages and self-employment income.5Social Security Administration. Contribution and Benefit Base Medicare has no cap. The worksheet accounts for the deductible half of self-employment tax, so follow it line by line.
Once you have the total projected tax, subtract any W-2 withholding (yours or a spouse’s) and any credits. What remains is what estimated payments need to cover. Then subtract the estimated payments you’ve already made this year and divide the balance by the number of quarterly deadlines still ahead. Recalculating in July with two deadlines left means splitting the remaining balance across those two payments. You cannot go back and change a payment you’ve already sent.
The Annualized Income Installment Method
If your income clusters in one part of the year — seasonal work, a year-end bonus, a November capital gain — the standard even-quarters approach can force artificially large payments in early quarters when you haven’t earned much. The annualized income installment method bases each quarter’s required payment on income actually earned during that period.6Internal Revenue Service. Instructions for Form 2210
To use it, complete Schedule AI of Form 2210 with your return. The periods aren’t neat quarters: they cover January through March, January through May, January through August, and the full year, and each period builds cumulatively. The IRS compares your annualized installment to the standard required installment and uses whichever is lower, then recaptures any shortfall in later quarters.
Submitting the New Amount Online
Electronic payments are the fastest way to get an adjusted amount on record, and several IRS options are free.
IRS Direct Pay
Direct Pay sends money straight from your bank account at no cost. Select “Estimated Tax” as the payment reason, choose the tax year, and verify your identity with information from a prior return. After entering your routing and account numbers, you get a confirmation number on the spot.7Internal Revenue Service. Direct Pay with Bank Account Payments submitted by 8 p.m. Eastern are typically credited the same business day.
IRS Online Account
Your IRS Online Account is now the main hub for individual tax payments. It shows your balance, payment history, and scheduled payments on one dashboard, and you can send estimated payments directly from linked bank information.8Internal Revenue Service. Payments Setting one up requires identity verification through ID.me.
EFTPS for Existing Users
The Electronic Federal Tax Payment System still works for people who already have accounts, but the IRS no longer allows individual taxpayers to create new EFTPS enrollments.9Internal Revenue Service. EFTPS: The Electronic Federal Tax Payment System If you’re enrolled, EFTPS lets you schedule payments up to 365 days in advance, which is useful for locking in all four quarters at once. If you’re not, use Direct Pay or your Online Account.
Credit and Debit Cards
Card payments go through IRS-authorized processors and carry convenience fees. Debit card transactions cost a flat $2.10 to $2.15. Credit cards run 1.75% to 1.85% with a $2.50 minimum.10Internal Revenue Service. Pay Your Taxes by Debit or Credit Card or Digital Wallet On a $5,000 payment, that’s roughly $88 to $93 by credit card. The IRS itself gets none of the fee, so bank-account options save money for most people.
Submitting the New Amount by Mail
If you’d rather send paper, use the quarterly vouchers from Form 1040-ES. Each payment needs its own voucher with your name and Social Security number on the printed lines.11Internal Revenue Service. Form 1040-ES – Estimated Tax for Individuals
Make the check or money order payable to “United States Treasury.” Write “2026 Form 1040-ES” and your SSN on the check. For joint filers, use the SSN that will appear first on the return. Enclose the check with the voucher but don’t staple them together; staples interfere with processing.11Internal Revenue Service. Form 1040-ES – Estimated Tax for Individuals
The mailing address depends on where you live. The IRS currently routes estimated payments to two processing centers: Charlotte, NC (P.O. Box 1300) for the southern, western, and central states, and Louisville, KY (P.O. Box 931100) for the northeast and upper midwest.12Internal Revenue Service. Form 1040-ES Addresses for Taxpayers Living Within the 50 States These change from time to time, so confirm yours in the current Form 1040-ES instructions before mailing. A tracked delivery service gives you proof of timely mailing if a deadline dispute ever comes up.
Adjusting W-4 Withholding Instead
If you also receive wages or a pension, increasing paycheck withholding can replace estimated payments altogether. File a new Form W-4 with your employer and enter an additional dollar amount to withhold each pay period.2Internal Revenue Service. Estimated Taxes The IRS Tax Withholding Estimator will calculate the amount for you and generate a pre-filled W-4 based on your paystub, expected self-employment income, and deductions.13Internal Revenue Service. Tax Withholding Estimator
Withholding has a real advantage over estimated payments here. It’s treated as paid evenly across the year even if it all comes from December paychecks, so it can retroactively cover earlier quarters where estimated payments fell short. Estimated payments are credited only to the quarter in which they’re made.
The Deadlines You’re Aiming At
For 2026, estimated tax payments are due on these dates:11Internal Revenue Service. Form 1040-ES – Estimated Tax for Individuals
- First quarter: April 15, 2026
- Second quarter: June 15, 2026
- Third quarter: September 15, 2026
- Fourth quarter: January 15, 2027
The second quarter deadline arrives just two months after the first, not three, which catches people off guard. If a due date falls on a Saturday, Sunday, or legal holiday, it shifts to the next business day.14Internal Revenue Service. When to File You can skip the January 15, 2027 payment entirely if you file your 2026 return and pay the balance in full by February 1, 2027.11Internal Revenue Service. Form 1040-ES – Estimated Tax for Individuals
Safe Harbors That Keep the New Number Penalty-Free
Your recalculated payments need to hit one of two targets to avoid a penalty: pay at least 90% of what you end up owing for the current year, or pay 100% of the tax shown on last year’s return.15Office of the Law Revision Counsel. 26 USC 6654 – Failure by Individual to Pay Estimated Income Tax Whichever number is smaller is all you have to cover.
Higher earners face a stricter version. If your adjusted gross income on last year’s return exceeded $150,000 ($75,000 if married filing separately), the prior-year safe harbor rises to 110% of last year’s tax.16Office of the Law Revision Counsel. 26 USC 6654 – Failure by Individual to Pay Estimated Income Tax Many self-employed people with variable income prefer the prior-year approach because it’s a fixed number known in January, divided by four. The trade-off is that if income drops sharply, you’ll overpay through the year.
You also avoid the penalty if you owe less than $1,000 after withholding and credits, regardless of what you paid in installments.17Internal Revenue Service. Topic No. 306, Penalty for Underpayment of Estimated Tax And if you had zero tax liability last year, were a U.S. citizen or resident alien the whole year, and last year covered a full 12 months, you’re exempt from estimated tax requirements for the current year entirely.2Internal Revenue Service. Estimated Taxes
If You Underpay Anyway
The underpayment penalty is charged separately on each quarterly shortfall, calculated at the federal short-term rate plus three percentage points. For the first quarter of 2026, that’s 7% per year, compounded daily.1Internal Revenue Service. Interest Rates Remain the Same for the First Quarter of 2026 The rate is reset every quarter. The penalty runs from each quarterly due date until the date you pay or until April 15 of the following year, whichever comes first.16Office of the Law Revision Counsel. 26 USC 6654 – Failure by Individual to Pay Estimated Income Tax
Because the penalty is calculated quarter by quarter, one missed deadline triggers a charge on that quarter’s shortfall even if you pay a large lump sum later. Catching up doesn’t erase what already accrued.
If the Recalculation Shows You’ve Overpaid
If the new numbers reveal you’ve already paid more than you’ll owe, you have two options. Drop your remaining quarterly payments to zero and collect the overpayment as a refund when you file. Or, when you file, elect on Form 1040 to apply the overpayment toward next year’s estimated tax instead of receiving a refund. Once you choose to apply it forward, that decision is generally irrevocable — you can’t switch to a cash refund later in the year.
There is no mechanism to pull back an estimated payment you’ve already made before the return for that tax year is filed. Reducing the next quarter’s payment is the only lever available until then.