A tax deduction is an item you can subtract from your taxable income to lower the amount of taxes you owe. Browse Investopedia's expert-written library to learn more. 

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Section 1244 Stock Definition, Qualification Rules
Mortgage
Is PMI or MIP Tax Deductible?
Form 2106-EZ: Unreimbursed Employee Business Expenses: Overview
Form 3903: Moving Expenses: What It is, How it Works
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16 Self-Employed Tax Deductions and Benefits
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Additional Personal Allowance: What It is, How It Works
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What Are Itemized Tax Deductions? Definition and Impact on Taxes
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7 Insurance-Based Tax Deductions You May Be Missing
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How to Deduct Stock Losses From Your Tax Bill
Tax Deduction: A sum you can deduct from your taxable income to lower the amount of taxes you owe.
Understanding Tax Deductions: Itemized vs. Standard Deduction
Long-Term Capital Gains and Losses: Definition and Tax Treatment
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The Most Overlooked Tax Deductions
Tax-Loss Harvesting
Tax-Loss Harvesting: Definition and Example
Capital Loss Carryover: The net amount of capital losses eligible to be carried forward into future tax years.
Capital Loss Carryover: Definition, Rules, and Example
Cropped shot of a person working on their taxes, with calculator and laptop on the desk
Tax Shield: Definition, Formula for Calculation, and Example
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Form 4952: Investment Interest Expense Deduction Overview
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Tax-Deductible Interest: Definition and Types That Qualify
Combing Through the Fine Print
Property Tax Deduction: Definition, How It Works and How to Claim
Small Business Supply Chain
Understanding Business Expenses and Which Are Tax Deductible
Close up of hands working on taxes holding a pen and using a calculator
Deduction Definition and Standard Deductions for 2023 and 2024
Annual Investment Allowance (AIA) Definition, Eligibility
Personal Income Taxes
IRS Publication 529 (Miscellaneous Deductions): Overview
Qualified Production Activities Income (QPAI): Overview
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Ordinary and Necessary Expense: What it is, How it Works
Ordinary Loss Tax Deduction: Meaning and FAQs
For a Secure Future You've Got to Plan for It
IRS Publication 463: Travel, Gift, and Car Expenses Overview
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What Does Tax Deductible Mean, and What Are Common Deductions?
Recapture: What it is, How it Works, Uses
5 Ways to Make Summer Camp Tax Deductible
Home Office: What it is, How it Works, FAQ
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Travel Expenses Definition and Tax Deductible Categories
Fractional Gift
Internal Revenue Service building
Are IRS Penalties Tax Deductible?
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Charitable Donation: Definition, Examples, Tax Deduction Rules
Percentage Depletion: Meaning, Overview, Benefits
Foreign Tax Deduction: What it Means, How it Works, Example
Itemized Deductions: What It Means and How to Claim
Standard Mileage Rate Tax Deduction Overview
Mortgage Interest Deduction: Overview, Examples, FAQ
IRS Publication 536
Smith Maneuver: A tax strategy that effectively makes interest on a residential mortgage tax-deductible in Canada.
The Smith Maneuver: Definition, How It Works, and How to Use It
Business travel
Lodging Expenses: What They are, How They Work
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Transportation and Storage Costs
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Primary Business Purpose: What It is, How it Works
Casualty and Theft Losses: Overview and Examples
Away From Home
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Educator Expense Deduction: What It Means, How It Works, Limits
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Track Your Mileage for Taxes in 8 Easy Steps
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Assessable Profit: What It is, How It Works, Example
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Getting U.S. Tax Deductions on Foreign Real Estate
Deducting Stock Losses: A Guide
Cut Taxes by Reporting Property Damage
Capital Losses and Tax
Couple seated at a table at home, using a calculator and an adding machine to work on their taxes
How to Qualify for the Home Office Tax Deduction
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Rental Property Tax Deductions
Reduce Your Taxable Income With Above-the-Line Deductions

Deductions & Credits