The U.S. federal income tax system is pay-as-you-go. Employees generally meet that requirement through paycheck withholding. Business income usually is not subject to automatic withholding, so self-employed people may need to make estimated tax payments during the year.
Skipping required payments — even if you pay your full balance when you file — can trigger an underpayment penalty. This guide explains who needs to pay, when, and how to reduce that risk.
Who Needs to Pay Estimated Taxes
For 2026, you generally must make estimated tax payments if both of these are true:
- You expect to owe at least
$1,000after subtracting withholding and tax credits. - You expect your withholding and credits to be less than the smaller of 90% of your 2026 tax or 100% of the tax shown on your 2025 return. The prior-year percentage rises to 110% for certain higher-income taxpayers, as explained below. Your 2025 return must cover all 12 months.
This commonly applies to:
- Freelancers and independent contractors
- Sole proprietors and single-member LLC owners
- Gig workers
- Anyone with significant income that is not subject to withholding
Use Form 1040-ES to confirm your specific requirement rather than guessing. Special rules apply in some situations, including farming, fishing, and fiscal-year filing.
What the Payments Cover
Estimated payments can cover:
- Income tax — including the effect of your business profit on your total taxable income.
- Self-employment tax — generally Social Security and Medicare taxes on net earnings from self-employment.
- Other taxes that apply to your return — such as the Additional Medicare Tax in some situations.
If you are unsure how much of your income to save for these, start with our guide on how much to set aside for self-employment taxes.
The 2026 Payment Deadlines
For a calendar-year taxpayer, the 2026 estimated tax deadlines are:
| Installment | Income period | Due date |
|---|---|---|
| 1st | Jan 1 – Mar 31, 2026 | April 15, 2026 |
| 2nd | Apr 1 – May 31, 2026 | June 15, 2026 |
| 3rd | Jun 1 – Aug 31, 2026 | September 15, 2026 |
| 4th | Sep 1 – Dec 31, 2026 | January 15, 2027 |
When a due date falls on a weekend or legal holiday, it generally shifts to the next business day. The intervals are not three equal calendar-month quarters, so use the IRS dates rather than assuming a three-month schedule.
The Safe-Harbor Rules (How to Avoid Penalties)
You can generally avoid an underpayment penalty if your withholding and timely estimated payments meet one of these safe harbors:
- 90% of the tax shown on your current year’s return, or
- 100% of the tax shown on your prior year’s return.
The prior-year return must cover all 12 months. There is also an important rule for higher earners: if your 2025 adjusted gross income was more than $150,000 ($75,000 if your filing status for 2026 is married filing separately), the prior-year safe harbor generally rises to 110% of last year’s tax.
These percentages determine your required annual payment. You still need to pay enough by each due date. If your income is uneven during the year, review the annualized income installment method in IRS Publication 505 and the Form 2210 instructions.
How to Pay
You have several options to make estimated payments:
- IRS Online Account — make payments and view payment history.
- IRS Direct Pay — pay directly from a checking or savings account online, at no cost.
- Electronic Federal Tax Payment System (EFTPS) — pay online or by phone after enrolling, at no cost.
- Debit card, credit card, or digital wallet — pay through a service provider; fees apply.
- Form 1040-ES voucher — pay by mail with a check or money order.
Keep a record of each payment and the date. You will reconcile these against your total liability when you file.
A Simple System That Works
Estimated taxes feel overwhelming until you build a routine:
- Track your net profit as it grows during the year.
- Set aside a percentage of each payment in a separate account.
- Use Form 1040-ES to estimate your required payment and revisit it when your income changes.
- Pay enough by each deadline.
- Reconcile and settle any difference when you file.
If you also receive W-2 wages, increasing your paycheck withholding may be another way to cover some of your tax obligation. The hardest part is usually knowing your real net profit — income minus allowable business expenses — at any point in the year. Simple-C helps organize your business transactions by Schedule C category so you can review your profit and prepare a cleaner breakdown when it is time to estimate and pay.
Once the year is over, our step-by-step Schedule C guide walks through reporting it all on your return.
This article provides general information, not tax advice. Estimated tax requirements, deadlines, and safe-harbor thresholds depend on your situation and can change. Confirm the rules for your tax year with the IRS or a qualified tax professional.