Tax Deductions Most People Miss (And How to Claim Them)

Why Most People Leave Money on the Table

The IRS estimates that millions of Americans overpay their taxes each year simply by missing deductions they’re entitled to claim. Some of these are overlooked because people don’t realize they qualify; others require a bit of record-keeping that makes them easy to skip. Here are the most commonly missed deductions and how to claim them.

1. Student Loan Interest

If you paid interest on a qualifying student loan, you can deduct up to $2,500 per year — even if you don’t itemize deductions. This is an above-the-line deduction, meaning it reduces your adjusted gross income directly. Income limits apply: the deduction phases out for single filers earning $75,000–$90,000 and joint filers earning $155,000–$185,000.

2. Educator Expenses

K-12 teachers, principals, aides, and counselors can deduct up to $300 ($600 for joint filers who are both educators) of out-of-pocket classroom expenses. Qualifying expenses include books, supplies, computer equipment, and professional development courses. No itemizing required.

3. Home Office Deduction

If you work from home as a self-employed person (freelancer, contractor, small business owner) and have a space used regularly and exclusively for business, you can deduct it. The simplified method allows $5 per square foot up to 300 sq ft. W-2 employees cannot claim this deduction under current law.

4. Charitable Contributions — Non-Cash

Most people remember to deduct cash donations, but many forget non-cash contributions: clothing donated to Goodwill, furniture to a nonprofit, food to a food bank. These have real value and are deductible at fair market value when you itemize. Keep a detailed list and get a receipt from the organization.

5. Medical Expenses Above 7.5% of AGI

If you itemize and your out-of-pocket medical expenses exceed 7.5% of your AGI, the excess is deductible. This includes premiums you pay for insurance not through an employer, dental care, vision, prescriptions, and even mileage driven for medical appointments ($0.21/mile in 2024).

6. Self-Employed Health Insurance Premiums

If you’re self-employed and paid for your own health, dental, or vision insurance — including coverage for your spouse and dependents — you can deduct 100% of those premiums above the line. This applies even if you don’t itemize and reduces your AGI directly.

7. Energy-Efficient Home Improvements

The Inflation Reduction Act expanded tax credits for energy-efficient home upgrades. The Residential Clean Energy Credit (solar, geothermal, battery storage) is 30% of costs with no cap. The Energy Efficient Home Improvement Credit offers up to $3,200 for qualifying improvements like insulation, heat pumps, and windows.

8. State and Local Taxes (SALT) — Up to $10,000

If you itemize, you can deduct up to $10,000 ($5,000 if married filing separately) in state and local income taxes, sales taxes, and property taxes. This is often overlooked by people who recently bought a home or live in a high-tax state.

9. Investment Losses

Capital losses can offset capital gains, and if losses exceed gains, you can deduct up to $3,000 against ordinary income per year. Unused losses carry forward indefinitely. This strategy — called “tax-loss harvesting” — is powerful but requires proper record-keeping.