Standard deduction.
In plain English
When you file your federal taxes, you can either take the standard deduction (a flat amount based on your filing status) or itemize specific deductions (mortgage interest, state and local taxes up to a cap, charitable donations, etc.). The standard deduction for 2026 is $16,100 for single filers and $32,200 for married filing jointly (these numbers adjust slightly each year for inflation; 2026 reflects amendments from the One Big Beautiful Bill Act). Most people take the standard. It's bigger than what they'd get from itemizing.
01Why it matters
Knowing the standard deduction is the foundation of understanding your tax return. It's why someone earning $40,000 doesn't pay tax on every dollar, the first $16,100 (single) is deducted before any tax is calculated. This is also why charitable giving doesn't necessarily reduce your taxes: if your itemizable deductions don't exceed the standard deduction, you take the standard anyway and the charitable gift didn't change your tax bill.
02The math, step by step
A single filer earning $50,000 in 2026 subtracts the $16,100 standard deduction and is taxed on $33,900 (their 'taxable income'). At the marginal-rate schedule, federal income tax on $33,900 is roughly $3,800, about 7.6% effective rate. Without the standard deduction, the same person would owe roughly $5,800.
03What this is NOT
A deduction reduces your taxable income before tax is calculated. A credit reduces your tax bill dollar-for-dollar after it's calculated. A $1,000 deduction in the 22% bracket saves you $220. A $1,000 credit saves you $1,000. Credits are more powerful but rarer.
04Receipts
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