Year-End Tax Tips: Last-Minute Strategies to Lower Your Tax Bill

The final months of the year offer critical opportunities to reduce your tax bill before the calendar turns. Year-end tax planning allows you to accelerate deductions, defer income, harvest investment losses, and maximize retirement contributions. This guide covers actionable strategies you can implement between October and December to lower your tax liability, including Roth conversions, charitable giving strategies, tax-loss harvesting, retirement account optimization, medical expense planning, and income timing techniques.

Review Your Current Tax Situation

Before implementing any year-end strategies, you need a clear picture of your projected tax situation. Calculate your estimated adjusted gross income, taxable income, and marginal tax rate for the current year. Compare this to your prior year return to identify changes. Consider major life events that may have affected your taxes, such as marriage, divorce, birth of a child, job change, business startup, or inheritance. Use a tax projection worksheet or tax software to estimate your current year liability.

Identify your marginal tax bracket and whether you are near the boundaries. If you are close to the top of a bracket, small changes in income or deductions could push you into a higher bracket. For 2026, the single filer brackets are approximately: 10% up to $11,600, 12% up to $47,150, 22% up to $100,525, 24% up to $191,950, 32% up to $243,725, 35% up to $609,350, and 37% above. Understanding your bracket helps determine which strategies provide the most benefit.

Also review your exposure to the Net Investment Income Tax, the Alternative Minimum Tax, and phase-outs of deductions and credits. The NIIT applies 3.8% to net investment income for single filers with MAGI over $200,000. The AMT has its own exemption amounts and phase-out thresholds. The child tax credit, education credits, IRA deduction, and other benefits phase out at specific income levels. Year-end strategies can reduce AGI to avoid these thresholds.

Maximize Retirement Contributions

Increasing retirement contributions is one of the most effective year-end tax strategies. For 2026, the 401(k) elective deferral limit is $23,500, with a $7,500 catch-up for those 50 and older. Traditional 401(k) contributions reduce your current-year taxable income dollar for dollar. If you have not maxed out your 401(k), increase your deferral percentage for the remaining pay periods to reach the limit. Some employers allow after-tax contributions up to the total plan limit of $69,000 combined with employer contributions.

IRA contributions for the current tax year can be made up to the filing deadline, typically April 15 of the following year. For 2026, the IRA contribution limit is $7,000 ($8,000 if 50+). If you are eligible for a deductible Traditional IRA, you have until April 15, 2027 to make contributions for 2026 and receive the deduction. Roth IRA contributions also have until the filing deadline. The extended deadline makes IRA contributions a flexible year-end planning tool, but earlier contributions allow more time for tax-free growth.

Self-employed individuals should consider SEP IRA or Solo 401(k) contributions. SEP IRA contributions are based on net self-employment income and can be made up to the filing deadline, including extensions. The maximum contribution is 25% of compensation, up to $69,000 for 2026. Solo 401(k) plans allow both employee deferrals and employer profit-sharing contributions. Employer contributions for 2026 can be made up to the filing deadline plus extensions, giving you until October 15, 2027 to fund your 2026 Solo 401(k) employer contribution.

Harvest Investment Losses

Year-end is the prime time for tax-loss harvesting. Review your portfolio for investments that have declined in value since purchase. Selling these positions before December 31 realizes losses that can offset capital gains realized during the year. If your losses exceed your gains, you can deduct up to $3,000 of the excess against ordinary income. Net losses beyond $3,000 carry forward to future years. December is typically the busiest month for tax-loss harvesting, so execute trades early in the month to allow for settlement and avoid the rush.

When harvesting losses, be mindful of the wash sale rule. Do not repurchase the same or substantially identical security within 30 days before or after the sale. If you want to maintain market exposure, reinvest in a different fund that tracks a similar but not identical index. For example, sell an S&P 500 fund and buy a total stock market fund. Wait 31 days before repurchasing the original fund. Also check your spouse's and IRA accounts for wash sale triggers, as purchases in those accounts count toward the wash sale calculation.

Consider tax-gain harvesting as well. If you have carryforward losses from prior years or are in the 0% long-term capital gains bracket, you may want to sell appreciated investments to reset their cost basis without paying tax. The 0% long-term capital gains bracket for 2026 applies to single filers with taxable income up to approximately $47,025 and married couples up to $94,050. If your income is below these thresholds, selling appreciated assets can provide a tax-free step-up in basis, reducing future gains.

Roth Conversion Opportunities

Roth conversions allow you to move funds from a Traditional IRA to a Roth IRA, paying income tax on the converted amount. Converting in years when your income is lower than normal can result in significant tax savings. Year-end is an ideal time to evaluate Roth conversions because you have a clearer picture of your full-year income. If a market downturn has reduced the value of your Traditional IRA, converting now allows you to pay tax on a lower amount while the market recovers inside the Roth.

Consider partial conversions that fill up lower tax brackets without pushing you into a higher bracket. For 2026, a single filer with $50,000 in ordinary income has approximately $47,150 of room in the 12% bracket before hitting the 22% bracket. Converting up to that amount would be taxed at only 12%. You can do this annually to gradually move funds from Traditional to Roth status at favorable rates. This strategy is particularly valuable in the years between retirement and starting Social Security and RMDs.

Be aware of the pro-rata rule if you have both pre-tax and after-tax funds in your Traditional IRAs. The tax on a conversion is based on the proportion of pre-tax funds in all your Traditional IRAs, SEP IRAs, and SIMPLE IRAs combined. If you have significant pre-tax funds, a conversion may be more expensive than expected. Consider rolling pre-tax IRA funds into a 401(k) before converting to isolate the after-tax basis. Roth conversions must be completed by December 31 to count for the current tax year.

Strategy	Deadline	Tax Benefit	Best For
401(k) deferral increase	Last payroll of year	Reduces current taxable income	Employees with room below limit
IRA contribution	April 15 following year	Deduction or tax-free growth	Anyone with earned income
Tax-loss harvesting	December 31	Offset gains, $3k income deduction	Taxable account investors
Roth conversion	December 31	Future tax-free growth	Lower-income years
Charitable donation	December 31	Itemized deduction	Itemizers, QCD for 70.5+
Business equipment purchase	December 31	Section 179 deduction	Self-employed, businesses

Charitable Giving Strategies

Charitable donations made by December 31 are deductible on your current year return. Cash donations to qualified charities are deductible up to 60% of AGI. Donating appreciated securities held for more than one year is even more tax-efficient. When you donate appreciated stock or mutual fund shares, you avoid capital gains tax on the appreciation and receive a charitable deduction for the full fair market value. This strategy is particularly valuable for highly appreciated assets with low cost basis.

Qualified Charitable Distributions (QCDs) allow individuals aged 70.5 or older to distribute up to $105,000 directly from their IRA to charity. The QCD counts toward the Required Minimum Distribution but is excluded from taxable income. This is more beneficial than taking the RMD as income and then making a charitable donation, because the QCD avoids both income tax and the phase-out of deductions and credits caused by higher AGI. QCDs also reduce AGI, which can lower Medicare premiums and the net investment income tax.

Donor-advised funds provide flexibility for year-end giving. You can contribute cash or appreciated securities to a DAF by December 31 and receive an immediate charitable deduction. The funds can then be distributed to charities over time, allowing you to take the deduction in a high-income year while supporting causes over multiple years. DAFs are offered by most major brokerages including Fidelity, Schwab, and Vanguard. The minimum initial contribution is typically $5,000.

Bunch Itemized Deductions

Because the standard deduction is relatively high under the Tax Cuts and Jobs Act, many taxpayers do not benefit from itemizing. The 2026 standard deduction is projected at approximately $14,600 for single filers and $29,200 for married couples. If your itemizable deductions are close to these amounts, consider bunching deductions into alternating years. By concentrating deductible expenses in one year, you can itemize that year and take the standard deduction in the next year, achieving more total deductions over two years than itemizing both.

Medical expenses can be bunched by scheduling elective procedures before year-end. Since medical expenses are only deductible to the extent they exceed 7.5% of AGI, concentrating them in a single year helps clear the threshold. Dental work, vision correction, elective surgeries, hearing aids, and medical equipment are all candidates for bunching. Similarly, state and local tax payments can be accelerated by paying estimated state income taxes or property taxes before December 31, subject to the $10,000 SALT deduction cap.

Charitable giving is one of the most flexible deductions for bunching. By contributing multiple years' worth of donations to a donor-advised fund in a single year, you create a large itemized deduction while maintaining the ability to distribute the funds to charities over time. This strategy is particularly effective for high-income taxpayers who expect to be in a lower tax bracket in future years. Combining charitable bunching with mortgage interest and state tax payments can produce enough itemized deductions to make itemizing worthwhile.

Defer Income and Accelerate Deductions

Deferring income to the following year can reduce your current year tax liability, particularly if you expect to be in a lower tax bracket next year. For W-2 employees, this may involve delaying bonuses if your employer allows it. For self-employed individuals, you can delay invoicing clients until late December so payment arrives in January. However, constructive receipt rules require that income is taxed when it is available to you, not necessarily when you receive it. If a check is mailed in December, it is generally taxable in December even if you deposit it in January.

Accelerating deductible expenses before year-end reduces your taxable income. Prepaying state income tax estimates, property taxes, mortgage interest (if the prepayment is allowed), and business expenses can shift deductions into the current year. For business owners, purchasing necessary equipment, supplies, or software before December 31 can generate current-year deductions. Section 179 allows immediate expensing of qualifying business assets placed in service by December 31, up to $1,160,000 for 2026.

However, the alternative minimum tax can limit the benefit of accelerating certain deductions. State and local tax deductions and miscellaneous itemized deductions are not allowed for AMT purposes. If you are subject to AMT, accelerating state tax payments provides no benefit and can actually increase AMT liability. Before prepaying state taxes, determine whether you are likely to be subject to AMT. The AMT exemption amounts for 2026 are projected at approximately $85,700 for single filers and $133,300 for married couples.

Medical and Health Planning

Health Savings Account contributions for the current year can be made up to the filing deadline, but maximizing contributions as early as possible allows more time for tax-free growth. For 2026, HSA contribution limits are projected at $4,300 for individuals and $8,600 for families, with $1,000 catch-up for those 55+. HSAs provide a triple tax benefit: contributions are deductible, earnings grow tax-free, and withdrawals for qualified medical expenses are tax-free. Even if you have already met your deductible for the year, consider funding your HSA to the maximum.

Flexible Spending Account balances must be used by year-end in most plans. Check your FSA balance and schedule eligible medical expenses before the deadline. Many plans offer a grace period of up to 2.5 months or allow a carryover of up to $640, but these are optional features. Use FSA funds for eyeglasses, contact lenses, dental work, prescription copays, over-the-counter medications, and other qualified expenses. If you have a Limited Purpose FSA paired with an HSA, funds can be used for dental and vision expenses.

Medical expense planning for the following year can begin at year-end. If you expect significant medical expenses in the coming year, schedule elective procedures in January rather than December to concentrate them in the next tax year for better bunching. Conversely, if you have already cleared the 7.5% AGI threshold for medical deductions this year, accelerate remaining medical expenses into the current year to maximize the deduction. Prescription refills and scheduled follow-up appointments can often be moved earlier.

Education Tax Credits

Year-end is an important time for education tax planning. The American Opportunity Tax Credit provides up to $2,500 per student for the first four years of college. The credit is 100% of the first $2,000 of qualified education expenses and 25% of the next $2,000. Qualified expenses include tuition, fees, and course materials. If you have a student in their first four years of college, paying spring semester tuition before December 31 can generate the credit for the current tax year, even if the semester starts in January.

The Lifetime Learning Credit provides up to $2,000 per return for undergraduate, graduate, and professional degree courses, as well as courses to acquire or improve job skills. Unlike the AOTC, there is no limit on the number of years you can claim the credit, and it covers a broader range of educational expenses. However, the credit is 20% of the first $10,000 of expenses, making it less valuable than the AOTC. The income phase-out ranges are lower for the Lifetime Learning Credit as well.

529 plan contributions may provide state tax benefits depending on your state of residence. Many states offer deductions or credits for 529 contributions up to certain limits. Review your state's rules and consider making contributions before year-end to receive the state tax benefit. Some states require contributions by December 31, while others use the federal filing deadline. Contributions to 529 plans can also be used for K-12 tuition up to $10,000 per year per beneficiary, in addition to qualified higher education expenses.

Review Withholding and Estimated Payments

Year-end is the final opportunity to adjust your tax withholding to avoid penalties and ensure you have paid enough tax. Use the IRS Tax Withholding Estimator to check whether your current withholding is adequate. If you are underwithheld, increase your withholding for the remaining pay periods. You can also make an additional estimated tax payment by January 15 of the following year to cover the shortfall. The safe harbor rules protect you from penalties if you have paid at least 90% of the current year's tax or 100% of the prior year's tax.

For self-employed individuals, review your quarterly estimated payments to ensure they cover your projected tax liability. If you underestimated your income for the year, make an additional payment by January 15. Use the annualized income installment method on Form 2210 if your income was concentrated in certain quarters, as this may reduce or eliminate underpayment penalties. Form 2210 is complex, so tax software or a professional can help with the calculation.

Finally, organize your tax records before year-end. Gather receipts for charitable contributions, medical expenses, business expenses, and education costs. Ensure you have mileage logs for business and medical driving. Review your investment statements for realized gains and losses. Collect W-9 forms from new contractors you hired. Organizing records now makes tax filing smoother in April and helps you identify any additional deductions or credits you may have missed. For more strategies, visit the IRS Year-End Tax Planning page, read NerdWallet's year-end tax guide, or see Forbes Advisor's year-end tax tips.

This article is for informational purposes only and does not constitute professional tax advice. Tax laws change frequently and individual circumstances vary. Always consult a qualified tax professional for guidance specific to your situation.