When Are Taxes Due in 2026? Key IRS Deadlines for Individuals and Businesses

If you are planning ahead for the 2026 tax season, one of the most important questions is simple: When are taxes due in 2026? Understanding federal tax deadlines helps you avoid penalties, interest, and unnecessary stress. Below is a clear breakdown of the major 2026 IRS tax filing and payment deadlines for individuals, self-employed taxpayers, and business entities.

This guide focuses on federal deadlines. State and local deadlines may vary.

Individual Income Tax Deadline in 2026

For most taxpayers, federal individual income tax returns for tax year 2025 are due on:

April 15, 2026

April 15, 2026 is a Wednesday, and it is not affected by a federal holiday, so no automatic shift applies.

This deadline applies to:

• Form 1040 individual returns

• Balance-due tax payments

• Most IRA and HSA contributions for 2025

• First quarter estimated tax payment for 2026

If you cannot file by April 15, you may request an automatic extension.

However, an extension extends the time to file, not the time to pay. Any balance due must still be paid by April 15, 2026 to avoid penalties and interest.

2026 Individual Tax Extension Deadline

If you file an extension (Form 4868), your extended individual return will be due:

October 15, 2026

Again, taxes owed must still be paid by April 15, even if you extend the return.

Quarterly Estimated Tax Deadlines in 2026

Self-employed individuals, contractors, gig-economy workers, and investors may need to make estimated tax payments.

Estimated tax due dates for tax year 2026 are:

• April 15, 2026 – 1st quarter

• June 15, 2026 – 2nd quarter

• September 15, 2026 – 3rd quarter

• January 15, 2027 – 4th quarter

If a date falls on a weekend or federal holiday, it typically moves to the next business day.

Business Tax Deadlines in 2026

Below are the major business filing dates for calendar-year entities.

Partnership and S Corporation Returns (Forms 1065 and 1120-S)

Original deadline:

March 16, 2026
(March 15 falls on a Sunday, so the deadline moves to Monday)

Extended deadline:

September 15, 2026

C Corporation Returns (Form 1120)

For calendar-year corporations:

• Original deadline: April 15, 2026

• Extended deadline: October 15, 2026

Fiscal-year corporations file on the 15th day of the fourth month after year-end.

Trust and Estate Returns (Form 1041)

• Original deadline: April 15, 2026

• Extended deadline: September 30, 2026

Nonprofit Organization Returns (Form 990 Series)

• Original deadline: May 15, 2026

• Extended deadline: November 16, 2026 (because Nov 15 is a Sunday)

FBAR and Foreign Asset Reporting Deadlines

For taxpayers with qualifying foreign accounts:

• FBAR (FinCEN 114) due April 15, 2026

• Automatic extension available to October 15, 2026

Form 8938 (FATCA) is due with your federal tax return.

Retirement and Savings Contribution Deadlines

For tax year 2025 contributions:

• Traditional and Roth IRA contributions due April 15, 2026

• HSA contributions due April 15, 2026

• Solo 401(k) and SEP-IRA deadlines vary depending on entity type and extension status

State Tax Deadlines May Differ

Many states follow IRS deadlines, but not all. Some have:

• earlier deadlines

• different extension rules

• separate payment due dates

Always check your specific state filing requirements.

Avoid Penalties: What Happens If You Miss a Deadline?

Missing federal tax deadlines can result in:

• failure-to-file penalties

• failure-to-pay penalties

• compounding daily interest

• loss of certain elections or tax benefits

In some cases the IRS may grant relief, but proactive planning is always best.

Need Help Preparing Your 2026 Taxes?

If you want professional guidance, accurate filing, and strategies to legally minimize your tax liability, our firm is here to assist.

We provide:

• individual tax preparation

• small business and corporate tax filing

• bookkeeping and payroll

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Final Note

This information is for general educational purposes and may not apply to your specific situation. Tax laws change, and individual circumstances differ. Always consult a qualified tax professional before making filing or payment decisions.

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Disclaimer: This content is for educational and informational purposes only and is not intended as tax, legal, or financial advice. Tax rules and regulations may change and individual circumstances vary. Please consult a licensed tax professional, accountant, or attorney before making decisions regarding business structure or tax planning.