10 Legal Ways to Lower Your Taxable Income and Keep More Money

Why Reducing Your Taxable Income Is One of the Best Financial Moves

Every dollar you reduce from your taxable income saves you money at your marginal tax rate. If you’re in the 22% federal bracket and reduce your taxable income by $10,000, you save $2,200 in federal taxes. Add state income tax on top and your savings could be $2,500–$3,500. Multiply that over a career of smart tax planning and we’re talking about hundreds of thousands of dollars over a lifetime.

The key insight is that reducing taxable income is not tax evasion—it’s tax planning. The IRS has built dozens of incentives into the tax code designed to encourage retirement savings, healthcare spending, homeownership, education, and charitable giving. Taking advantage of these incentives is not just legal; it’s exactly what Congress intended.

1. Maximize Your 401(k) or 403(b) Contributions

The single most impactful strategy for most working Americans is maximizing contributions to a traditional (pre-tax) workplace retirement plan. For 2024, you can contribute up to $23,000 to a 401(k) or 403(b), or $30,500 if you are 50 or older. Every dollar contributed reduces your taxable income by that same amount.

For a person in the 22% bracket contributing the full $23,000, the tax savings are $5,060 in federal taxes alone. If your state has a 5% income tax, add another $1,150 in state savings. That’s over $6,200 in combined tax savings each year, plus the benefit of tax-deferred compound growth.

2. Contribute to a Traditional IRA

If you don’t have access to a workplace plan, or if your income is below certain thresholds, a traditional IRA contribution is fully deductible. For 2024, you can contribute up to $7,000 (or $8,000 if 50+). The deductibility phases out for those who also have a workplace plan at higher incomes: $77,000–$87,000 for single filers and $123,000–$143,000 for married filing jointly.

3. Fund a Health Savings Account (HSA)

An HSA is one of the only accounts with triple tax advantages: contributions are tax-deductible, growth is tax-free, and withdrawals for qualified medical expenses are tax-free. To qualify, you must be enrolled in a High-Deductible Health Plan (HDHP). For 2025, contribution limits are $4,300 for self-only and $8,550 for family coverage, with an additional $1,000 catch-up for those 55+.

Unlike a Flexible Spending Account, HSA funds roll over indefinitely and can be invested. Many savvy savers contribute the maximum, invest in index funds, and let the balance grow untouched until retirement, when it can be used for Medicare premiums and other healthcare costs.

4. Use a Flexible Spending Account (FSA)

If your employer offers an FSA, contribute the amount you expect to spend on medical and dental costs. FSA contributions are made pre-tax, reducing your taxable income. The 2024 limit is $3,200. Unlike HSAs, FSAs are use-it-or-lose-it (some plans allow a $640 rollover), so estimate your spending conservatively. Dependent care FSAs allow up to $5,000 pre-tax for childcare expenses, saving families in the 22% bracket over $1,000 annually.

5. Deduct Student Loan Interest

If you paid interest on qualifying student loans, you can deduct up to $2,500 per year regardless of whether you itemize. This above-the-line deduction phases out for single filers with modified AGI between $80,000 and $95,000 and for married filers between $165,000 and $195,000. If you’re within these limits, don’t miss this deduction—it directly reduces your AGI without any extra paperwork beyond Form 1098-E.

6. Claim Self-Employment Deductions

If you have self-employment income—freelancing, consulting, a side business—you can deduct a wide range of business expenses before the income reaches your tax return. Deductible expenses include home office costs (using either the simplified or actual method), business mileage ($0.67 per mile in 2024), professional subscriptions, equipment, marketing, and the cost of health insurance premiums for yourself and your family.

Self-employed individuals can also contribute to a SEP-IRA (up to 25% of net self-employment income, maximum $69,000 for 2024) or a solo 401(k), dramatically reducing taxable income from a business.

7. Itemize Deductions When It Makes Sense

If your allowable deductions—mortgage interest, state and local taxes (capped at $10,000), charitable contributions, and medical expenses above 7.5% of AGI—exceed your standard deduction, itemizing will lower your taxable income more. For homeowners with significant mortgages or residents of high-tax states, this can easily mean an additional $5,000–15,000 in deductions beyond the standard amount.

8. Harvest Tax Losses

Tax-loss harvesting involves selling investments that are trading below your purchase price to realize a capital loss. These losses can offset capital gains dollar for dollar and can offset up to $3,000 of ordinary income per year. Excess losses carry forward to future years. After selling, you can reinvest in a similar (but not identical) investment to maintain your market exposure while capturing the tax benefit.

9. Donate Appreciated Assets to Charity

Instead of donating cash to charity, consider donating appreciated stock or other assets held for more than a year. You get to deduct the full fair market value of the asset, and you avoid paying capital gains tax on the appreciation. For example, if you own stock worth $5,000 that you purchased for $1,000, donating it directly gives you a $5,000 deduction and eliminates the $4,000 capital gain entirely. This strategy is especially powerful for investors in higher brackets.

10. Use a Qualified Opportunity Zone or 529 Plan

Investing capital gains in a Qualified Opportunity Zone fund defers and potentially reduces capital gains taxes. Contributions to a 529 college savings plan do not reduce federal taxable income but do reduce state taxable income in over 30 states. If your state offers a deduction (typically $2,000–5,000 per beneficiary), contributing to a 529 is an easy way to reduce your state tax bill.

Building Your Tax Reduction Strategy

The most effective approach is to layer multiple strategies together. A household earning $120,000 that maximizes a 401(k) ($23,000), contributes to an HSA ($8,550 for family), deducts student loan interest ($2,500), and itemizes $32,000 in deductions might bring their taxable income down from $120,000 to $53,950—dropping from the 22% marginal bracket to the 12% bracket on much of their income. The total tax savings could exceed $15,000 per year.

The key is to plan year-round, not just in April. Review your withholding, estimate your year-end tax liability in November or December, and make last-minute contributions to reduce your bill before December 31 (IRA contributions can be made until the April filing deadline, but 401(k) contributions must be made by December 31).