Definition
The standard deduction is a fixed amount the IRS lets you subtract from your gross income before calculating your tax. In 2026, the standard deduction is $16,100 for single filers, $32,200 for married filing jointly, and $24,150 for head of household — amounts adjusted annually for inflation.
Roughly 90% of taxpayers take the standard deduction because it's simpler and, for most people, larger than what they'd get by itemizing. You don't need receipts or records to claim it — it's automatic.
If your itemized deductions (mortgage interest, state taxes, charitable contributions, etc.) exceed the standard deduction, it may be worth itemizing on Schedule A instead.
How this affects your W-4
For W-4 purposes, the standard deduction is built into the withholding calculation automatically — you don't need to enter it anywhere. Your employer's payroll system subtracts it when calculating withholding.
If you itemize and your deductions exceed the standard deduction, enter the excess amount in Step 4b to reduce your withholding accordingly.
See how standard deduction affects your withholding
Use the free W-4 calculator to calculate your exact withholding with your specific situation.
Open the W-4 Calculator →Read the guide
2026 Federal Tax Brackets and Standard Deduction (All Filing Statuses)
The 2026 brackets for single, married filing jointly and head of household, the standard deductions, and how they feed your paycheck withholding.
W-4 Changes for 2026: What's New and What You Need to Do
Updated brackets, higher standard deduction, raised SS wage base. Everything that changed for 2026 withholding and whether you need to submit a new W-4.
W-4 Step 4 Explained: Other Income, Deductions, and Extra Withholding (2026)
Step 4 is how you fine-tune for side income, itemized deductions, and extra withholding. Most people skip it — here's when you shouldn't.
Related terms
Itemized Deductions
Specific deductible expenses you list on Schedule A instead of taking the standard deduction.
Taxable Income
The portion of your income subject to federal income tax after all deductions are applied.
Deductions Worksheet
The worksheet on the W-4 (page 4) whose line 15 total goes in Step 4(b): itemizing above the standard deduction, tips, overtime, car loan interest, seniors, student loan interest and more.