As the calendar creeps toward December 31, a few targeted moves can meaningfully reduce your taxes and keep more money compounding for your future. Below are ten practical, “average-Joe” strategies we help clients consider at Legacy Tree Financial. You don’t need to do them all—pick the ones that fit your situation, and knock them out before the ball drops.
1) Max out your workplace retirement plan (401(k), 403(b), 457(b), TSP)
Every dollar you defer to a traditional workplace plan before year-end generally lowers your 2025 taxable income. In 2025, the elective deferral limit is $23,500 (or $31,000 if you’re 50+, thanks to a $7,500 catch-up). SIMPLE plans allow $16,500 deferrals in 2025, with standard catch-ups of $3,500 (and special higher catch-ups for ages 60–63 on certain plans). Payroll has to process deferrals by 12/31, so don’t wait [1].
Tip: If your employer offers a match, contribute at least enough to get the full match—it’s free money.
2) Top off your IRAs (and coordinate with your spouse)
For 2025, the IRA contribution limit is $7,000 (or $8,000 if you’re 50+). Even if you participate in a workplace plan, you might still get a partial or full deduction depending on income—check the IRS phase-outs. While you technically have until the April filing deadline to fund a 2025 IRA, getting it done by year-end keeps you on track and starts compounding sooner [1].
Roth option: If you’re over the Roth income limits, ask about the “backdoor Roth” approach (nondeductible IRA → Roth conversion). See Move #7 for conversion timing.
3) Use HSAs (and don’t confuse them with FSAs)
If you’re enrolled in a high-deductible health plan, an HSA is the only account with triple tax benefits: deductible (or pre-tax) contributions, tax-free growth, and tax-free withdrawals for qualified medical expenses—now or decades from now. For 2025, HSA contribution limits are $4,300 (self-only) and $8,550 (family), plus $1,000 catch-up if 55+ [2].
Pro move: If you can cash-flow current medical bills, let your HSA grow invested and save receipts—future reimbursements can be tax-free.
4) Don’t forfeit your Flexible Spending Account (FSA)
FSAs are “use it or lose it,” but many plans offer either a grace period or a carryover (not both). For 2025, the health FSA salary-reduction cap is $3,300; if your plan allows a carryover, up to $660 may roll into the next plan year [3].
Action: Book eligible care (glasses, dental work, prescriptions) before your plan’s cut-off.
5) Harvest losses—carefully (watch the wash-sale rule)
If your taxable investments are down, you can realize a loss to offset capital gains and up to $3,000 of ordinary income (with the rest carried forward). Just avoid the wash-sale rule: you can’t buy a “substantially identical” security within 30 days before or after selling for a loss, or the loss is disallowed [4].
Note: Tax-loss harvesting doesn’t apply inside IRAs/401(k)s, only taxable accounts.
6) Give smart: bunch deductions, donate appreciated assets, or use QCDs
With today’s higher standard deduction, many families “bunch” charitable gifts into one year to itemize, then take the standard deduction in the off year. A donor-advised fund can streamline this—gift appreciated stock (avoid capital gains), get the deduction this year, and grant to charities over time [5].
If you’re 70½ or older, consider a Qualified Charitable Distribution (QCD)—send money directly from your IRA to charity. It keeps the distribution out of your income, which can also help with Medicare IRMAA and other thresholds. For 2025, the QCD annual limit is $108,000 per person. QCDs must be completed by 12/31 [6].
7) Consider a right-sized Roth conversion (by 12/31)
Converting part of a traditional IRA to a Roth IRA can make sense in years you’re in a relatively lower tax bracket—future qualified withdrawals are tax-free. Key: the converted amount is taxed in the year you convert, and recharacterizing a conversion is no longer allowed. Conversions must be completed by 12/31 to count for this tax year [7].
Guardrails: Model the conversion so it doesn’t push you into higher brackets or trigger IRMAA.
8) Satisfy Required Minimum Distributions (RMDs)—and don’t forget the first-timer rule
If you’re age 73+ this year, you generally must take RMDs by December 31. In the first RMD year only, you can delay until April 1 of the following year—but that means two RMDs in that next year, which can spike your income. Also note: starting 2024, Roth 401(k)/403(b) accounts no longer require RMDs for the original owner [8].
9) Check your withholding and Q4 estimated taxes
Avoid surprises and penalties by running the IRS Tax Withholding Estimator and updating your W-4 if needed. If you make quarterly estimates, the Q4 2025 payment is due January 15, 2026. One convenient tactic for retirees: Ask your IRA custodian to withhold taxes from a December distribution—IRS treats withholding as paid evenly throughout the year, which can help you clear underpayment penalties [9].
10) Get two bonuses: small-business expensing and family education planning
For business owners: Placing qualifying equipment in service by 12/31 matters. Section 179 expensing and bonus depreciation can accelerate deductions; under the current phase-down, the special depreciation allowance is 40% for 2025 [10].
For families: 529 college savings plans can be “super-funded” using the 5-year election—you can treat a lump-sum contribution as made ratably over five years for gift-tax purposes. For 2025, the annual gift exclusion is $19,000 per recipient, so one person can front-load $95,000 (or $190,000 if two spouses elect gift-splitting) [11].
Bonus move: Grab available home-energy credits
If you’re upgrading your home, the Energy Efficient Home Improvement Credit (25C) offers up to $3,200 per year across categories. The separate Residential Clean Energy Credit (25D) equals 30% of qualified costs for things like solar and battery storage [12].
Quick year-end checklist
Increase your 401(k)/403(b)/457(b) or SIMPLE deferrals on your next paycheck(s).
Make your IRA/HSA/529 contributions plan (and set reminders).
Review taxable accounts for harvestable losses (mind wash-sale).
Decide on charitable strategy: bunching, appreciated assets, or QCD.
Confirm all RMDs/QCDs will clear before 12/31.
Run the IRS Withholding Estimator; adjust W-4 or set a Q4 estimate.
If self-employed or a business owner, time equipment “placed in service” for deductions.
Collect receipts and documentation for credits (energy upgrades, education, childcare, etc.).
How Legacy Tree Financial can help
If any of these moves apply to you (they often do!), we can run the numbers, coordinate with your CPA, and implement before deadlines—so you start 2026 in a stronger spot. We’ll tailor the strategy to your bracket, Medicare/IRMAA thresholds, state taxes, and long-term goals.
Sources
IRS — 401(k) limit increases to $23,500 for 2025; IRA limit remains $7,000 — https://www.irs.gov/newsroom/401k-limit-increases-to-23500-for-2025-ira-limit-remains-7000
IRS — Rev. Proc. 2024-25: 2025 HSA/HDHP limits — https://www.irs.gov/pub/irs-drop/rp-24-25.pdf
IRS — Rev. Proc. 2024-40: 2025 Health FSA limit and carryover — https://www.irs.gov/pub/irs-drop/rp-24-40.pdf
IRS Publication 550 — Investment Income & Expenses (wash-sale rules) — https://www.irs.gov/publications/p550
IRS Publication 526 — Charitable Contributions — https://www.irs.gov/publications/p526
IRS — QCD limit indexed to $108,000 for 2025 — https://www.irs.gov/newsroom/give-more-tax-free-eligible-ira-owners-can-donate-up-to-105000-to-charity-in-2024
IRS — Roth IRA Conversion Rules — https://www.irs.gov/retirement-plans/roth-iras
IRS — RMD FAQs & designated Roth accounts exempt from RMDs (2024 forward) — https://www.irs.gov/retirement-plans/retirement-plan-and-ira-required-minimum-distributions-faqs
IRS — Form 1040-ES due dates & Tax Withholding Estimator — https://www.irs.gov/pub/irs-pdf/f1040es.pdf ; https://www.irs.gov/individuals/tax-withholding-estimator
IRS Publication 946 — How to Depreciate Property (Section 179 and bonus depreciation) — https://www.irs.gov/publications/p946
IRS — 2025 Annual gift tax exclusion & 529 plan 5-year election Q&A — https://www.irs.gov/newsroom/irs-provides-tax-inflation-adjustments-for-tax-year-2025 ; https://www.irs.gov/newsroom/529-plans-questions-and-answers
IRS — Energy Efficient Home Improvement Credit (25C) & Residential Clean Energy Credit (25D) — https://www.irs.gov/credits-deductions/energy-efficient-home-improvement-credit ; https://www.irs.gov/credits-deductions/residential-clean-energy-credit
Disclosure: This article is for educational purposes only and is not tax, legal, or investment advice. Tax rules change and your situation is unique. Before acting, consult your tax professional and, if applicable, your financial advisor. Legacy Tree Financial is not a tax preparer; we coordinate with your CPA to implement appropriate strategies.