Estimated Tax Payments: Due Dates, Safe Harbor, and How to Pay
Last updated 06/08/2026 by
Ante Mazalin
Edited by
Andrew Latham
Summary:
Estimated tax payments are quarterly prepayments to the IRS on income that isn’t subject to withholding, such as self-employment, investment, and rental income.
They keep you current with the IRS throughout the year instead of facing one large bill in April.
- Who pays them: Freelancers, business owners, investors, and retirees with untaxed income.
- When they’re due: Four times a year, in April, June, September, and January.
- Why they matter: Skipping them can trigger an IRS underpayment penalty.
- How much: Enough to meet a safe harbor based on this year’s or last year’s tax.
For anyone used to a paycheck with taxes already taken out, the idea of paying the IRS four times a year feels strange. Estimated payments simply replace the withholding an employer would normally handle.
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Who needs to make estimated tax payments
You generally must make estimated payments if you expect to owe at least $1,000 in tax after subtracting withholding and credits. The IRS applies this rule to income that no one withholds tax from on your behalf.
That covers a wide range of earners beyond the self-employed.
- Freelancers and gig workers: Income reported on a 1099 with no tax withheld.
- Business owners and partners: Profit from a sole proprietorship, partnership, or S corporation.
- Investors: Capital gains, dividends, and interest above what withholding covers.
- Landlords: Net rental income.
- Retirees: Distributions or Social Security when not enough tax is withheld.
2026 estimated tax due dates
Estimated taxes are paid in four installments that do not line up with even calendar quarters. For the 2026 tax year, the deadlines reported by Kiplinger are:
| Payment | Covers income from | Due date |
|---|---|---|
| Q1 | January 1 to March 31, 2026 | April 15, 2026 |
| Q2 | April 1 to May 31, 2026 | June 15, 2026 |
| Q3 | June 1 to August 31, 2026 | September 15, 2026 |
| Q4 | September 1 to December 31, 2026 | January 15, 2027 |
If you file your 2026 return and pay the full balance by January 31, 2027, you can skip the final January installment.
The safe harbor rule
The safe harbor is the amount you must prepay to avoid an underpayment penalty, even if you end up owing more at filing. Meeting it protects you regardless of how your final tax shakes out.
According to the IRS, you satisfy the safe harbor by paying the smaller of two targets:
- 90% of this year’s tax: Based on what you actually expect to owe for 2026.
- 100% of last year’s tax: Based on your 2025 return, which rises to 110% if your 2025 adjusted gross income was over $150,000 ($75,000 if married filing separately).
Pro Tip
If your income is unpredictable, base your payments on 100% (or 110%) of last year’s tax. That number is already known, so you lock in penalty protection without guessing at a moving target, and you settle any remaining balance at filing.
How to pay estimated taxes
The IRS offers several ways to pay, and you can calculate the amount using Form 1040-ES, which includes worksheets to project your tax.
How to make an estimated tax payment
- Estimate your income: Project your total taxable income for the year, including all untaxed sources.
- Calculate the tax: Use the Form 1040-ES worksheet to figure income tax plus self-employment tax.
- Divide into four: Split the annual amount across the four payment periods, or adjust if income is uneven.
- Choose a payment method: Pay online through IRS Direct Pay, the EFTPS system, by card, or by mailing a voucher.
- Keep records: Save confirmation numbers so you can reconcile payments on your return.
Self-employment income carries both income tax and the 15.3% self-employment tax, so estimated payments for the self-employed are usually larger than expected.
Related reading on income taxes
- Schedule C: where the self-employed report the income that drives estimated payments.
- Federal income tax: how the underlying tax you’re prepaying is calculated.
- Tax bracket: the rates that determine how much of each dollar you owe.
- 1099: the forms that report the untaxed income behind most estimated payments.
Frequently asked questions
What happens if I don’t pay estimated taxes?
The IRS can charge an underpayment penalty, calculated as interest on the amount you should have paid each quarter. The penalty applies even if you pay your full balance by the April filing deadline.
How do I know how much to pay?
Use Form 1040-ES to estimate your tax, then aim to meet a safe harbor: 90% of this year’s tax or 100% of last year’s (110% for higher earners). Paying the prior-year amount is the simplest way to stay protected.
Can I make estimated payments if I also have a job?
Yes. Many people increase their paycheck withholding instead, but you can make estimated payments to cover side income. Withholding counts as paid evenly through the year, which can simplify safe harbor math.
What if my income changes mid-year?
You can adjust your remaining payments up or down. The IRS allows annualized installments for income that arrives unevenly, such as a large fourth-quarter capital gain.
Are estimated payments the same as withholding?
They serve the same purpose but work differently. Withholding is taken automatically from wages, while estimated payments are sent by you on income that has no withholding.
Key takeaways
- Estimated tax payments are quarterly prepayments on income that has no withholding.
- You generally owe them if you expect to owe $1,000 or more after withholding and credits.
- For 2026, payments are due April 15, June 15, September 15, and January 15, 2027.
- Meet the safe harbor by paying 90% of this year’s tax or 100% of last year’s (110% if your prior AGI topped $150,000).
- Missing payments triggers an underpayment penalty even if you pay in full at filing.
If estimated taxes have piled into a balance you can’t pay at once, the IRS offers structured options. You can compare tax relief services to find help setting up a payment plan.
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