What Is a Tax Deduction?
In plain English
A tax deduction is an expense or allowance that reduces your taxable income before your tax liability is calculated. Unlike a tax credit, which cuts your bill dollar-for-dollar, a deduction saves you a percentage of the deducted amount based on your marginal tax rate.
How Does a Tax Deduction Reduce What You Owe?
Deductions work by shrinking the pool of income the IRS taxes. If you earn $80,000 and claim $10,000 in deductions, you are taxed on $70,000. In a 22% bracket, that $10,000 deduction saves you $2,200. The higher your bracket, the more valuable each dollar of deduction becomes.
What Are the Most Common Tax Deductions?
Common deductions include mortgage interest, state and local taxes (capped at $10,000), charitable contributions, student loan interest, and contributions to traditional IRAs or HSAs. Self-employed individuals can also deduct business expenses, health insurance premiums, and half of their self-employment tax.
Should You Take the Standard Deduction or Itemize?
You choose between the standard deduction and itemizing each year. Itemizing makes sense only when your qualifying expenses exceed the standard deduction for your filing status. Most taxpayers find the standard deduction simpler and larger, but high earners with significant mortgage interest or charitable gifts often benefit from itemizing.
Frequently asked questions
Is a tax deduction the same as a tax credit?
No. A deduction reduces taxable income, saving you a fraction of the deducted amount. A credit reduces your actual tax bill dollar-for-dollar. A $1,000 credit saves exactly $1,000; a $1,000 deduction saves $220 if you are in the 22% bracket.
Can I claim deductions if I take the standard deduction?
Most deductions require itemizing, but a few are 'above-the-line' adjustments available to everyone. Student loan interest, IRA contributions, and educator expenses reduce your adjusted gross income regardless of whether you itemize or take the standard deduction.
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Related terms
Standard Deduction
The standard deduction is a fixed dollar amount that reduces your taxable income without requiring you to list individual expenses. Most Americans claim it instead of itemizing.
Itemized Deductions
Itemized deductions let you list specific qualifying expenses to reduce taxable income instead of taking the standard deduction. They benefit taxpayers with large mortgage interest, medical bills, or charitable contributions.
Adjusted Gross Income (AGI)
Adjusted gross income is your total income minus specific above-the-line deductions. It is the key figure on your tax return that determines eligibility for many credits, deductions, and financial programs.
Tax Credit
A tax credit directly reduces your tax bill dollar-for-dollar, making it more valuable than a deduction of the same amount. Credits can be refundable, nonrefundable, or partially refundable.
Charitable Deduction
A charitable deduction allows taxpayers who itemize to deduct donations made to qualifying nonprofit organizations. The deduction reduces taxable income and provides a tax incentive for generosity.