Common Tax Deductions: What You Can Claim and How They Work
Tax deductions reduce the amount of income you owe taxes on. When you claim a deduction, you're telling the IRS, "Don't count this portion of my income as taxable." The result: lower taxable income, which typically means a smaller tax bill.
Understanding which deductions you're eligible to claim depends on your filing status, income level, type of income, and life circumstances. This guide explains how deductions work and what types exist—so you can evaluate your own situation.
Standard Deduction vs. Itemized Deductions
You have two paths to reduce your taxable income: claim the standard deduction or itemize your deductions.
Standard deduction: A fixed amount that varies by filing status and age. You take it or leave it—you don't list individual expenses. It's simpler and works well if your itemized deductions wouldn't exceed this baseline.
Itemized deductions: You add up qualifying expenses (mortgage interest, charitable donations, state and local taxes, medical costs above a threshold, and others) and claim the total. Itemizing only makes sense if your combined deductions exceed the standard deduction.
The math is straightforward: calculate both scenarios and use whichever gives you the larger deduction.
Common Types of Deductions 📋
Above-the-Line Deductions
These reduce your income before the standard/itemized calculation and apply whether or not you itemize:
- Traditional IRA contributions — contributions to a traditional Individual Retirement Account may be deductible depending on your income and whether you have employer-sponsored retirement plans
- Student loan interest — capped at a specific amount annually
- Self-employment tax — the employer portion of self-employment tax
- Health savings account (HSA) contributions — if you have a qualifying high-deductible health plan
- Educator expenses — teachers and school staff may deduct certain classroom supplies
Itemized Deductions
If you itemize, you may claim:
- Mortgage interest and property taxes — on primary and second homes, subject to limits
- State and local taxes (SALT) — income, sales, or property taxes combined, up to a cap
- Charitable contributions — donations to qualified nonprofits and organizations
- Medical and dental expenses — the portion exceeding a percentage of your adjusted gross income (AGI)
- Casualty and theft losses — property damage from disasters or theft
Business Deductions
Self-employed people and small-business owners can deduct ordinary and necessary business expenses:
- Office supplies and equipment
- Home office expenses (if you use space exclusively for business)
- Vehicle mileage (using either actual expenses or a standard mileage rate)
- Professional services and contractors
- Insurance and licenses
Variables That Determine Your Deductions 🔍
Filing status — Single, married filing jointly, married filing separately, and head of household filers each have different standard deduction amounts and eligibility rules.
Income level — Some deductions phase out or disappear entirely above certain income thresholds. High earners may lose eligibility for certain credits and deductions.
Age — Taxpayers 65 and older get an additional standard deduction.
Life circumstances — Whether you're married, have dependents, own a home, or are self-employed affects which deductions apply to you.
Documentation — You must keep receipts, bank statements, and records to support any deduction you claim.
Why Documentation Matters
The IRS doesn't take deductions on faith. Whether you claim $500 in charitable donations or $50,000 in business expenses, you need records to back it up. The burden is on you to prove your deduction is legitimate if questioned.
What You Need to Know Before You File
Not every expense is deductible, and not every deduction applies to every taxpayer. Tax law also changes—sometimes from year to year. This landscape changes regularly enough that what was deductible one year may have limits or restrictions the next.
Your job is to identify which deductions might apply to you. A qualified tax professional or tax software can help you calculate which approach (standard or itemized) saves you the most, and flag deductions relevant to your specific situation.
