Key US federal tax deadlines for 2026. State and local deadlines may differ—always confirm with the IRS, your state revenue department, or your tax preparer. This guide focuses on the main federal dates that affect most individuals and self-employed filers.
If you receive income that is not subject to withholding—such as self-employment income, rental income, interest, dividends, or gig economy pay—you generally need to pay estimated tax quarterly. The IRS expects you to pay tax as you earn income during the year. If you do not pay enough through withholding and estimated payments, you can face an underpayment penalty when you file. Use our tax calculator to estimate your liability and plan quarterly payments.
Estimated taxes are quarterly payments for income that is not subject to withholding. The four due dates are typically January 15 (for Q4 of the prior year), April 15, June 15, and September 15. If a due date falls on a weekend or holiday, the IRS usually moves it to the next business day. Filing an extension (e.g. Form 4868) gives you until October 15 to file your return, but it does not extend the time to pay any tax due; interest and penalties may apply on amounts paid after April 15. Plan ahead so you are not caught short.
Many states follow the federal calendar (e.g. April 15 for individual returns), but some have different dates or different rules for estimated payments. If you live or work in a state with income tax, check your state revenue department for exact deadlines. Local taxes (e.g. city or school district) may also have separate due dates. Keeping a single calendar with both federal and state dates can help you avoid missed payments and late fees.
Pay at least 90% of the current year tax or 100% (110% for higher incomes) of the prior year tax through withholding and estimated payments to avoid underpayment penalties. Set reminders for each quarterly due date and keep records of every payment. If your income changes during the year, recalculate and adjust your next estimated payment. Use our salary calculator to see withholding impact when you change jobs or get a raise. When in doubt, consult a tax professional for your situation.
Keep copies of all estimated tax payment confirmations, W-2s, 1099s, and receipts for deductions. Organizing documents by year and category makes filing (or handing them to a preparer) much easier. If you use our tax or salary calculators during the year, note the assumptions you used so you can align them with actual forms when you file.
Tax Calculator, Salary Calculator. Understanding Tax Brackets, Financial Terms Glossary.