Tax Deductions Most People Miss

Every spring, people hand the IRS a tip by missing deductions they were entitled to. Not aggressive strategies — ordinary, documented expenses that simply never got recorded. Here are the ones that slip through most often, and how to make sure they don't slip through yours.

The 1099 and side-gig expenses. If you have any self-employment income — freelancing, delivery driving, selling online — you can deduct the ordinary costs of earning it: a mileage log for business driving (the rate is worth more than most people guess), a portion of your phone bill, software subscriptions, payment processing fees, and home office space that is regularly and exclusively used for the business. The home office deduction is less scary than its reputation: the simplified method is a flat dollar-per-square-foot calculation with no depreciation recapture.

Retirement contributions, if you're below the deduction threshold. Traditional IRA and 401(k) contributions are deductible the year you make them, which is why a December contribution can change your April tax bill. The trap is the income phase-outs: above certain income limits, traditional IRA deductibility fades. If you're in the phase-out zone, the math is worth doing carefully — and if you're below it, an unfunded IRA is a deduction left on the table.

HSA contributions. A health savings account is the only triple-tax-advantaged account most people can access: deductible going in, tax-free growth, tax-free out for qualified medical expenses. Contributions through payroll skip FICA too. Yet people routinely leave the deduction unclaimed because they treated the HSA as a spending account instead of a tax strategy. Even medical expenses you paid out of pocket years ago can be reimbursed tax-free later if you kept the receipts.

Educator, military, and other niche deductions. Teachers can deduct classroom supplies. Reservists and performers can deduct travel. State tax refunds, student loan interest (subject to income limits), and certain energy-efficient home improvements cycle in and out of the code — the point is that deductions are scattered, and a checklist beats memory.

Charitable giving — including the non-cash kind. Cash donations need bank records, not just charity acknowledgement letters. Donated goods need a written inventory and fair-market-value estimate — a photo of the full donation bag, taken before it leaves the house, is cheap audit insurance. Donating appreciated stock instead of cash avoids the capital gains hit on top of the deduction.

The part that actually matters: records. Every deduction above survives or dies on documentation. The pattern to adopt is simple: when an expense happens, record it — amount, date, category, business purpose if any. A tool that lets you flag deductible transactions as they sync from your bank, the way Everything Capital does with its deduction categories, turns tax season from a shoebox archaeology project into a sorted export. The deduction you document in October is the one you actually claim in April.

A caution to balance the enthusiasm: deductions reduce taxable income, not tax dollar-for-dollar — a $1,000 deduction saves you your marginal rate times $1,000, not $1,000. Never spend money purely to "get the deduction." The goal isn't cleverness; it's claiming everything you already legitimately spent.