The last few months of the year are the best window a freelancer has to actually influence their tax bill before it’s locked in. Once January arrives, most of the moves that could have lowered last year’s taxes are off the table — but October through December is exactly when a handful of deliberate decisions can still make a real difference.
Review Your Income and Estimated Payments So Far
Add up what you’ve actually earned and paid in estimated taxes through the third quarter, and compare it to what you originally projected. If income came in higher than expected, adjusting your fourth-quarter estimated payment upward now is far less painful than facing an underpayment penalty at filing time. If it came in lower, you may be able to reduce that final payment and keep more cash on hand through year-end.
Consider Timing Income and Expenses
Freelancers on cash-basis accounting have some flexibility over when income and expenses actually land. If this year was unusually high-earning, delaying a late-December invoice into January (where feasible) can push some income into next year. Conversely, if you’re expecting an even bigger year next year, accelerating a planned equipment purchase or software renewal into December can shift the deduction into the year it’s more valuable.
Max Out What You Can Before December 31
- Solo 401(k) contributions generally need to be made by December 31 for the elective deferral portion, even though the profit-sharing portion can often wait until the filing deadline
- Health Savings Account contributions have more flexibility (often up until the tax filing deadline) but are worth confirming now while there’s still time to adjust cash flow
- Charitable contributions, if you plan to itemize, need to be made within the calendar year to count
- Any equipment or software you were already planning to buy for the business next year, if buying it now creates a meaningful deduction this year
Gather Records Before They Scatter
December is a good time to reconcile the year’s bookkeeping while transactions are still fresh, rather than reconstructing twelve months of receipts in April. Confirm that mileage logs, home office measurements, and any 1099s you expect to receive from clients are accounted for, and follow up with any client who paid you $600 or more if you haven’t seen a 1099 request from them yet.
One Thing to Try This Week
Block out a single hour before the end of the month to run through your estimated payments, retirement contributions, and outstanding receipts against this checklist. Treating it as one scheduled hour, rather than something to get to eventually, is what actually gets it done before December 31.
The Bottom Line
None of these year-end moves require dramatic action — they’re small, deliberate adjustments to income timing, contributions, and records while there’s still time to make them. Freelancers who run through a version of this checklist every October through December consistently avoid the scramble that catches everyone else in April.
Frequently Asked Questions
Is it too late to open a retirement account for this tax year?
It depends on the account. A Solo 401(k) generally needs to be established by December 31 to make elective deferral contributions for the year, while a SEP-IRA can typically be opened and funded as late as your filing deadline, including extensions — which makes it a more forgiving option if you’re getting a late start on year-end planning.
Should I make a big equipment purchase in December just for the deduction?
Only if you genuinely need the equipment for the business regardless of taxes. A deduction reduces the cost of something you were going to buy anyway; it rarely makes sense to spend money purely to create a write-off, since you’re still spending real cash to save a smaller amount in tax.
What if I realize I’ve underpaid estimated taxes for the year?
Increasing your fourth-quarter payment as much as possible before its due date reduces the underpayment penalty compared to doing nothing, even if it doesn’t eliminate it entirely, since the penalty is calculated based on how much was owed and for how long. Catching it in December is meaningfully better than not noticing until the return is filed.
This article is for general educational purposes and isn’t personalized tax advice. Deadlines, contribution limits, and rules mentioned here change from year to year, so confirm current details on IRS.gov or with a tax professional before acting on any of them.
What’s the single most valuable year-end move for most freelancers?
Comparing actual year-to-date income against what was originally projected for estimated tax payments tends to matter most, since correcting a significant gap now is far cheaper than discovering it as an underpayment penalty after the year has already closed.