When people think about tax planning, they often think about April. But the truth is that many of the most valuable tax opportunities expire at the end of the calendar year, long before you ever file a return.
And that’s where the stress can creep in - not about markets, not about spending, but about the possibility of missing something important. A deduction. A deadline. A planning window that won’t come back once the new year begins.
The good news? Only a handful of last-minute moves truly deserve your attention. And when handled intentionally, they can reduce your lifetime tax burden, add flexibility to your retirement plan, and prevent those familiar “I wish I’d looked at this sooner” moments.
Below are the strategies worth reviewing before December 31.
1. Make Sure RMDs Are Complete and Don’t Overlook QCDs
If you’re age 73 or older, your Required Minimum Distribution (RMD) must be completed by December 31. There are no extensions or grace periods.
But for retirees who are charitably inclined, there's a powerful planning tool many overlook: the Qualified Charitable Distribution (QCD).
A QCD allows you to donate directly from your IRA to a qualified charity and:
- satisfy some or all of your RMD
- keep the amount out of taxable income
- potentially lower IRMAA exposure
- simplify year-end giving
It’s one of the cleanest tax strategies available to retirees and the window closes at year-end.
2. Revisit Roth Conversion Opportunities with Real Numbers in Hand
December is an ideal time to evaluate Roth conversions because you now have a clear picture of your actual taxable income for the year, not estimates.
That clarity allows you to convert strategically to the top of a tax bracket without accidentally crossing into the next one. You don’t need to convert everything. You don’t need to convert every year. But filling a bracket intentionally can:
- reduce future RMDs
- create tax-free income later
- strengthen your retirement cash-flow strategy
- provide flexibility in years when the market is down
And remember: Roth conversions must be completed by December 31.
3. Max Out Workplace Retirement Plans While Payroll Is Still Open
This is one of the most common year-end surprises.
Unlike IRAs, which can often be funded by April, workplace plans like 401(k)s and 403(b)s are tied directly to payroll. Once December payroll closes, the opportunity is gone.
Even increasing contributions for the final pay periods can meaningfully reduce taxable income.
For those age 50 and older, the catch-up contribution remains one of the most powerful tools available.
If you're self-employed, review the rules and deadlines for:
- SEP IRAs (and whether a Solo 401(k) would be better)
- SIMPLE IRAs (again, often replaced by a 401(k) for higher earners)
- Solo 401(k)s, including setup and funding requirements
A short review now can save taxes and confusion later.
4. Look for Tax-Loss Harvesting Opportunities — Even in Strong Markets
Tax-loss harvesting isn’t about timing the market. It’s about managing taxes efficiently.
Even when markets are up, certain holdings may be down. Harvesting losses allows you to:
- offset realized current and future capital gains
- reduce up to $3,000 of ordinary income
- reset the cost basis of your portfolio
This planning becomes especially important for people receiving RSUs or ESPP shares in December. Coordinating gains and losses can soften the tax impact of unexpected income.
5. Complete Charitable Giving Before Year-End
If you plan to itemize, charitable gifts must be made before December 31 to count for this tax year.
Even if you don’t itemize annually, a donor-advised fund (DAF) allows you to “bunch” several years of giving into a single, tax-efficient contribution. This can be especially helpful in high-income years or when coordinating large gains.
If you use QCDs, now is the time to confirm amounts have been sent and documented correctly.
6. Review Your Liquidity Going into the New Year
This doesn’t sound like a tax strategy. But it prevents many tax problems.
January can bring:
- quarterly estimated taxes
- property tax payments
- insurance premiums
- start-of-year spending
- portfolio rebalancing
If you don’t have enough cash on hand, you may be forced to sell investments at the wrong time or create taxable events unintentionally. A simple liquidity check can prevent frustration in the new year.
Final Thought
Year-end planning isn’t about doing everything. It’s about doing the right things. The moves that lower lifetime taxes, reduce surprises, and set you up for a confident start to the new year.
If you’d like help walking through your own last-minute opportunities, I’m always happy to talk through your options.