Year-End Tax Prep: The December Habits That Make April Painless

March is when most freelancers open their tax software for the first time. They spend the next four weeks stressed, scrambling for receipts, and filing extensions because they cannot get everything together in time.

The fix is simple. Do the work in December.

The December Checklist

1. Reconcile Your Spreadsheet

Sit down with your business bank statements and your tax spreadsheet. Every transaction from January through November should match. If there are gaps, fill them now. Finding missing transactions in December takes minutes. Finding them in March takes hours.

2. Estimate Your Tax Liability

Take your net profit through November. Add your December projections. Multiply by your effective tax rate. Compare against the estimated payments you have made.

If you have underpaid, you have until January 15 to make a catch-up Q4 payment. This avoids the underpayment penalty for the year.

3. Review Your Deduction Strategy

Look at your year-to-date numbers. Are you close to the standard deduction threshold? If so, consider bunching deductions. Prepay January expenses in December. Make charitable contributions before year-end. Buy that equipment you were planning to buy in January.

Bunching deductions into alternating years is legal tax planning. The IRS calls it deferral, not evasion, as long as the expenses are real and the timing reflects when you paid.

4. Max Out Retirement Contributions

You have until the tax filing deadline (April 15) to contribute to a Traditional IRA or SEP IRA for the prior year. But a solo 401(k) must be established by December 31, though contributions can be made until the filing deadline.

If you have not opened a solo 401(k) and your self-employment income supports it, open one before December 31. The tax deduction is worth thousands.

5. Collect Missing 1099s

If you paid any contractor $600 or more during the year, you need to issue them a 1099-NEC by January 31. Collect their W-9 now. If you wait until January, they will be on vacation.

If you earned income from platforms that should send you a 1099, verify your address and tax information on those platforms in December. A wrong address in January means a delayed 1099 and a delayed filing.

6. Review Your Entity Structure

If your net profit this year was significantly higher than last year, now is the time to talk to a tax professional about whether an S-Corp election makes sense for next year. The deadline for existing entities is March 15. For new entities, it is 75 days after formation.

You cannot change your 2025 tax structure in December 2025. But you can plan for 2026.

7. Schedule Your Tax Appointment

Good EAs and CPAs book up by February. Call in December. Get on their calendar for January or February. Filing in February gives you time to fix problems, fund retirement accounts, and still file by April 15 without an extension.

8. Organize Your Receipts Folder

Sort your receipts by category. Delete duplicates. Make sure every receipt over $75 is legible. If your receipt photo from June is blurry beyond recognition, find the email receipt now while you can still search for it.

The January 15 Deadline

Q4 estimated taxes are due January 15 for the previous year. This is the payment most freelancers miss because it falls in a different calendar year. Your brain thinks December 31 is the end. The IRS thinks January 15 is.

Pay it. Even if your Q4 income was low. The safe harbor protects you only if all four payments are made.

Block two hours. First week of December. This checklist. Every year. The freelancers who file in February without stress are not more organized than you. They started four months earlier.

Find an EA to handle your year-end planning →