This article is for general informational purposes. Readers should consult a qualified tax professional for guidance specific to their situation.
Quick Answer: What Should You Do Before December 31 for Taxes?
Year-end tax planning means making financial moves before December 31 that reduce your taxable income, maximize deductions, and help you avoid nasty surprises next April. For 2026, the standard deduction is $16,100 for single filers and $32,200 for married filing jointly — so whether you itemize or not, there are still smart moves on the table before the clock runs out.
The Big Misconception
A lot of people think tax planning happens in April, when they're sitting across from their preparer. Here's the deal — by April, the game is mostly over. Almost every real tax-saving move has a hard December 31 cutoff. After that, you're just reporting what already happened.
7 Tax Moves to Make Before December 31, 2026
1. Max Out Your Retirement Contributions
Contributions to a traditional 401(k) must go through payroll, so your last paycheck of 2026 is the true deadline. Every dollar you contribute reduces your taxable income dollar-for-dollar. If you're 50 or older, you can add an extra $7,500 in catch-up contributions. Note: IRA and HSA contributions have a longer runway — you have until April 15, 2027 to make 2026 contributions.
2. Take Your Required Minimum Distribution (RMD)
If you're age 73 or older, the IRS requires you to withdraw a minimum amount from your traditional IRA or 401(k) by December 31. Miss it, and you face a 25% excise tax on the amount you should have withdrawn. That's one of the steepest penalties in the tax code. Don't let it sneak up on you.
3. Spend Down Your FSA
Flexible Spending Account funds are use-it-or-lose-it. Check your balance now and schedule any eligible medical, dental, or vision appointments before year-end. Some plans offer a grace period through March 15, 2027, but many do not — verify your plan's rules today.
4. Harvest Tax Losses
If you hold investments that are down this year, selling them before December 31 lets you use those losses to offset capital gains — and up to $3,000 of ordinary income. Just watch the wash-sale rule: you can't buy the same or substantially identical security within 30 days before or after the sale.
5. Make Charitable Contributions
Cash and non-cash donations made by December 31 count for the 2026 tax year. If you're close to the standard deduction threshold, consider bunching two years of giving into one — it's a simple strategy that can push you over the itemizing line and unlock a real deduction. Keep all acknowledgment letters and receipts.
6. Review Your Withholding
With a few pay periods left in the year, it's worth pulling up your last pay stub and running the IRS Tax Withholding Estimator. If you're under-withheld, making an adjustment now can reduce or eliminate a penalty next spring. If you're way over-withheld, you've been giving the government an interest-free loan all year.
7. Check the New OBBBA Deductions
The One Big Beautiful Bill Act (OBBBA) introduced new deductions for tip income and overtime pay starting in tax year 2025, carried forward into 2026 planning. If you earn tips or overtime regularly, make sure your preparer knows — these deductions are new, and many taxpayers are leaving them on the table.
Don't Forget the SALT Cap
For 2026, the State and Local Tax (SALT) deduction cap was raised to $40,400 for most filers — a significant increase from prior years. If you own a home in a higher-tax state like Texas (with local property taxes), it's worth rechecking whether itemizing now makes more sense than taking the standard deduction.
Frequently Asked Questions
What is the 2026 standard deduction?
For tax year 2026, the standard deduction is $16,100 for single filers, $32,200 for married filing jointly, and $24,150 for heads of household.
When is the December 31 tax deadline important?
December 31 is the hard cutoff for 401(k) contributions made through payroll, charitable contributions, FSA spending, tax-loss harvesting, and required minimum distributions. Missing these dates means losing those benefits for 2026.
Can I still contribute to an IRA after December 31?
Yes — you have until April 15, 2027 to make IRA and HSA contributions for the 2026 tax year. This is one of the few areas where year-end is not the hard deadline.
What happens if I miss my RMD deadline?
Missing your required minimum distribution triggers a 25% excise tax on the amount you should have withdrawn. It may be reduced to 10% if you correct the shortfall within two years, but it's a penalty worth avoiding entirely.
What is the OBBBA tip and overtime deduction?
Under the One Big Beautiful Bill Act, workers may deduct certain tip income and overtime pay earned beginning January 1, 2025. If you receive tips or overtime regularly, confirm with your tax preparer whether you qualify for this deduction when filing your 2026 return.
Should I itemize or take the standard deduction in 2026?
For most taxpayers, the standard deduction is still the right call. But if your mortgage interest, state and local taxes (up to the $40,400 SALT cap), and charitable donations add up to more than your standard deduction, itemizing may save you more. Run the numbers — or let a tax professional do it for you.
Ready to Make Your Year-End Tax Moves?
The decisions you make between now and December 31 have a direct impact on what you owe next spring. If you're not sure where to start — or you want a second set of eyes on your situation — our team at Champion Tax & Financial Services is ready to help you finish 2026 on the right foot.
📞 Call us at (713) 777-0200 or visit www.ctaxfinancials.com to schedule your year-end tax review today.
Short version: December 31 isn't just a holiday — it's the last day to make most of your smartest tax moves of the year. Don't wait.
