📅 April 15 · Form 1040, 1040-ES, Form 4868
Personal Tax & Q1 Estimated Tax Due
The big one. Personal income tax returns are due. Also the first quarterly estimated tax payment for the current year. If you can't file, submit Form 4868 for a 6-month extension — but you still must pay what you owe.
Who: Everyone — individuals, sole proprietors, single-member LLCs
⚠️ Penalty for Missing This Deadline
5% per month on unpaid tax (up to 25%). Plus 0.5%/month failure-to-pay penalty. Interest accrues daily.
Tips to Stay on Track
1
Extension to file ≠ extension to pay. Pay your estimated liability by April 15
2
If you owe less than $1,000, no estimated tax penalty
3
IRA contributions for last year are also due today
Other Tax Deadlines
Related Resources
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