📅 March 15 · Form 1120-S, Form 1065
S-Corp and Partnership Tax Return Due
Tax returns for S-Corps and Partnerships are due one month before personal returns. These are pass-through entities — the return generates K-1s that owners use on their personal returns.
Who: S-Corporations, Partnerships, LLCs (multi-member)
⚠️ Penalty for Missing This Deadline
$220 per month per partner/shareholder, up to 12 months. A 4-partner S-Corp filing 3 months late = $2,640.
Tips to Stay on Track
1
File Form 7004 for automatic 6-month extension (to Sept 15)
2
Even with extension, K-1s should go to owners ASAP
3
Missing this deadline holds up everyone's personal returns
Other Tax Deadlines
Related Resources
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