Tax saving strategies don’t require months of advance planning. Several of the most effective moves can be made in the final days of the year. Whether you’re looking to reduce your tax liability through charitable giving, accelerate deductions, or harvest investment losses, the window before December 31 offers real opportunities to lower what you owe. Below are seven year-end tax tips you can act on right now, along with guidance on when each one actually pays off.
How prepaying property taxes reduces your tax bill
Paying your upcoming property tax bill before December 31, rather than waiting until its early-January due date, shifts that deduction into the current tax year. This is one of the simplest last-minute tax deductions available because the amount is already determined and you’re just moving the payment date forward.
Keep in mind that the state and local tax (SALT) deduction is capped for itemizers. Under the One Big Beautiful Bill Act, the cap is $40,000 for most filers for tax years 2025 through 2029 (with a small annual increase), up from the prior $10,000 limit, though the deduction phases down for taxpayers with modified adjusted gross income above $500,000 and is scheduled to revert to $10,000 in 2030. If you’ve already reached your applicable limit through state income and other local taxes, prepaying property taxes may not provide additional benefit. Review your total SALT exposure before writing the check. The IRS summarizes the SALT deduction rules on its website.
For taxpayers who itemize and have room under the cap, this single move can meaningfully reduce taxable income without requiring any lifestyle changes or complex financial maneuvers.
Why making your January mortgage payment early matters
Your January mortgage payment covers December’s interest, which means paying it before year end lets you claim that interest as a deduction on this year’s return. Mortgage interest remains one of the largest itemized deductions available to homeowners, and accelerating a single payment is a straightforward way to increase it.
Contact your mortgage servicer to confirm how to submit the payment so it’s credited in the current tax year. Some servicers process early payments differently, and you’ll want documentation showing the payment was received before January 1.
This strategy works best for homeowners who already itemize deductions. If you typically take the standard deduction, the additional mortgage interest alone may not be enough to push you over the threshold, but combined with other end-of-year tax strategies listed here, it could tip the balance. The IRS publishes the current standard deduction amounts each year, which gives you a benchmark to measure your itemized total against.
When to accelerate medical expenses for a larger deduction
Medical expenses are deductible only to the extent they exceed 7.5% of your adjusted gross income (AGI). That threshold means this deduction is only useful if you’ve already incurred significant medical costs during the year. If you’re close to or already above the 7.5% floor, scheduling and paying for planned medical procedures, dental work, or vision care before December 31 can increase your deduction. The IRS outlines exactly which costs qualify in its medical and dental expenses guidance.
Qualifying expenses include doctor and dentist visits, prescription medications, medical devices, and certain long-term care premiums. Medically necessary elective procedures, such as corrective eye surgery or orthodontic work, also count if paid within the tax year.
Track your year-to-date medical spending carefully. If you’re well below the 7.5% AGI threshold, accelerating medical expenses won’t help because the costs still won’t clear the floor. This strategy is most valuable for taxpayers who have already had a high-cost medical year.
How prepaying tuition can unlock education tax credits
If you or a dependent will begin an academic term in January, February, or March, paying that tuition before December 31 may qualify you for education tax credits on this year’s return. The American Opportunity Tax Credit (AOTC) is worth up to $2,500 per eligible student, while the Lifetime Learning Credit offers up to $2,000 per return.
These credits reduce your tax bill dollar-for-dollar, which makes them more valuable than deductions. However, each credit has specific eligibility requirements related to income, enrollment status, and the number of years claimed. Review the IRS education credits overview and confirm you meet the criteria before prepaying.
Tuition prepayment is one of the most overlooked tax saving strategies because many families assume they must wait until the semester starts to pay. In reality, the IRS allows credits for qualified tuition paid in the current year for academic periods beginning in the first three months of the following year.
Maximizing your charitable donation tax deduction before December 31
A charitable donation tax deduction is available to taxpayers who itemize and donate to qualified 501(c)(3) organizations. Cash donations, appreciated securities, household goods, and clothing all qualify, though the documentation requirements vary by type and amount. The IRS charitable contribution deductions page details the substantiation rules for each category.
Donating appreciated stock or mutual fund shares is one of the most tax-efficient forms of giving. You receive a deduction for the full fair market value of the shares while avoiding capital gains tax on the appreciation, a double benefit that makes this approach worth considering if you hold investments with significant unrealized gains.
For cash donations, keep receipts for every gift. Donations of $250 or more require a written acknowledgment from the charity. If you’re bundling multiple years of giving into a single year to exceed the standard deduction threshold, consider using a donor-advised fund, which lets you take the full deduction now while distributing the funds to charities over time.
Charitable giving is one of the most flexible end-of-year tax strategies because you control both the timing and the amount. Even small donations add up, and every dollar given to a qualified organization reduces your taxable income.
Using tax-loss harvesting to offset capital gains
Selling investments that have declined in value allows you to offset capital gains you’ve realized during the year, a strategy known as tax-loss harvesting. If your capital losses exceed your capital gains, you can deduct up to $3,000 of net losses against ordinary income, with any remaining losses carried forward to future years. The IRS explains the netting rules and carryover treatment in its capital gains and losses topic.
Review your portfolio for positions trading below your purchase price. Focus on investments you were already considering selling or replacing, since the IRS wash-sale rule prohibits you from claiming a loss if you repurchase a substantially identical security within 30 days before or after the sale.
Tax-loss harvesting is particularly valuable in years when you’ve sold appreciated property, exercised stock options, or received large capital gain distributions from mutual funds. It directly reduces your tax liability without requiring you to spend any additional money, since you’re simply realizing losses that already exist on paper.
This is one of the most powerful ways to reduce your tax liability, yet many investors overlook it because they associate selling at a loss with failure. In reality, strategic loss harvesting is a disciplined tax saving strategy that professional advisors use routinely.
Should you defer your year-end bonus to January?
If your employer offers flexibility on when bonuses are paid, deferring a December bonus into January pushes that income into the next tax year. This can be beneficial if you expect to be in a lower tax bracket next year, or if receiving the bonus this year would push you into a higher bracket or phase out certain deductions and credits.
Not every employer allows bonus deferral, and the rules around constructive receipt can be complex. If you have the unrestricted right to receive the payment in December, the IRS may still consider it current-year income regardless of when you actually cash the check. Talk to your employer and tax advisor about the specifics before assuming deferral will work.
Bonus deferral pairs well with the other last-minute tax deductions on this list. If you can defer income while simultaneously accelerating deductions, the combined effect on your taxable income is amplified.
When these year-end tax tips may not apply
Not every strategy listed above will benefit every taxpayer. If you’re subject to the alternative minimum tax (AMT), several of these deductions, particularly state and local taxes and certain itemized deductions, may be disallowed or limited under AMT rules.
Similarly, if you expect to move into a higher tax bracket next year, accelerating deductions into the current year (when your marginal rate is lower) could actually cost you more in the long run. In that scenario, it may be smarter to defer deductions and take them when they offset income taxed at a higher rate.
Tax law changes can also affect which strategies remain viable. Deduction limits, credit phase-outs, and rate brackets shift periodically, so what worked last year may not produce the same result this year. Before acting on any of these end-of-year tax strategies, consult a qualified CPA or tax advisor who can model the impact based on your specific situation. Our tax advisory services team builds these projections so you can compare outcomes before December 31 rather than guessing.
For business owners, year-end planning often extends beyond personal returns into entity-level decisions, equipment purchases, and retirement plan contributions. Coordinating those moves with your individual return frequently produces a larger combined benefit, and our broader accounting services can help you align both sides of the equation.
Frequently Asked Questions
What are the best last-minute tax deductions before December 31?
The most effective last-minute tax deductions include prepaying property taxes, making charitable donations, harvesting investment losses, and accelerating your January mortgage payment. Each of these moves can be completed in a single day and shifts the deduction into the current tax year. The best choice depends on your itemized deduction total and whether you’re above or below the standard deduction threshold.
How do charitable donations reduce my taxable income?
A charitable donation tax deduction lowers your taxable income dollar-for-dollar when you itemize. Cash gifts, donated goods, and appreciated securities all qualify if given to a 501(c)(3) organization. Donating appreciated stock is especially efficient because you avoid capital gains tax on the appreciation while still deducting the full market value.
Can I prepay property taxes to save on this year’s return?
Yes, paying a property tax bill that’s due in early January before December 31 lets you claim that expense on the current year’s return. However, the SALT deduction cap limits the total state and local tax deduction for itemizers. For 2025 through 2029 that cap is $40,000 for most filers (phasing down above $500,000 of modified adjusted gross income), and it is scheduled to drop back to $10,000 in 2030. If you’ve already reached your applicable cap, prepaying won’t provide additional tax savings.
What is tax-loss harvesting and how does it work?
Tax-loss harvesting involves selling investments that have dropped below your purchase price to realize a capital loss. Those losses offset capital gains from other sales, and up to $3,000 in net losses can be deducted against ordinary income each year. The IRS wash-sale rule requires you to wait at least 30 days before repurchasing a substantially identical investment.
Should I defer my bonus to next year to lower my taxes?
Deferring a bonus to January can reduce your current-year tax saving strategies if you expect to be in a lower bracket next year. However, the IRS constructive receipt rules may still treat the income as current-year if you had the right to receive it in December. Check with your employer and a tax advisor before relying on deferral.
How do I know if I should itemize deductions or take the standard deduction?
Compare your total itemizable expenses, including mortgage interest, state and local taxes, charitable donations, and qualifying medical costs, against the standard deduction for your filing status. If your itemized total exceeds the standard deduction, itemizing saves you more. Bunching deductions into a single year is a common tax saving strategy to clear that threshold.
