📅 December 31 · Various
Year-End Tax Planning Deadline
Last day to take tax-reducing actions for the current year: retirement contributions (401k, solo 401k), business expenses, charitable donations, equipment purchases (Section 179), and more.
Who: Everyone — individuals and businesses
⚠️ Penalty for Missing This Deadline
No IRS penalty — but missed deductions cost you money.
Tips to Stay on Track
1
Max out 401(k) contributions ($23,000 for 2026, $30,500 if 50+)
2
Make charitable donations and get receipts
3
Purchase needed business equipment before midnight (Section 179)
4
Harvest investment losses to offset gains
5
Review your estimated tax payments — make a catch-up Q4 payment if needed
Other Tax Deadlines
Related Resources
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