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Key IRS filing dates for individuals, businesses, NRIs, and expats. Never miss a deadline — penalties can be up to 25% of unpaid taxes.
Mon, June 15, 2026
Automatic 2-month extension for taxpayers living outside the US. Interest still accrues on unpaid tax from April 15.
Mon, June 15, 2026
Second quarterly estimated tax payment for tax year 2026. Use Form 1040-ES.
Tue, September 15, 2026
Extended deadline for S-Corp (1120-S) and Partnership (1065) returns.
Tue, September 15, 2026
Third quarterly estimated tax payment for tax year 2026. Use Form 1040-ES.
Thu, October 15, 2026
Final deadline for extended individual returns for tax year 2025. No further extensions available.
Thu, October 15, 2026
Final deadline for extended C-Corp returns.
Thu, October 15, 2026
Absolute final deadline for FinCEN Form 114. No further extensions.
Penalty for late filing
The IRS charges 5% of unpaid taxes per month for late filing (up to 25%) and 0.5% per month for late payment. Filing on time — even without full payment — significantly reduces penalties.
Our IRS-certified CPAs and Enrolled Agents can file your return accurately and on time. Get started today.
