What Is the Standard Deduction?
The standard deduction is a fixed dollar amount that reduces your adjusted gross income (AGI) before federal income tax rates are applied. It is available to most taxpayers who choose not to itemize their deductions. Taking the standard deduction is simpler than itemizing, and for the majority of taxpayers, it results in a lower taxable income than itemizing individual expenses would.
The standard deduction is set by Congress and adjusted annually by the IRS for inflation. Its amount depends on your filing status — single, married filing jointly, married filing separately, or head of household — and can also be affected by age and whether you can be claimed as a dependent.
How the Standard Deduction Reduces Taxable Income
The relationship between gross income, adjusted gross income, and taxable income follows a general sequence:
- Gross income — Total income from wages, self-employment, investments, and other sources before any adjustments
- Adjusted gross income (AGI) — Gross income minus certain "above the line" deductions such as student loan interest or contributions to certain retirement accounts
- Taxable income — AGI minus the standard deduction (or itemized deductions, whichever is larger)
Federal income tax brackets are applied to taxable income — not to gross income. This means the standard deduction directly reduces the income on which tax is calculated. A larger deduction means a lower taxable income and, all else equal, a lower federal tax amount.
Standard Deduction Amounts by Filing Status
The standard deduction amounts vary by filing status and are increased annually for inflation. The amounts below are approximate and illustrative of the general structure as of recent tax years. For the exact figures that apply to a specific tax year, consult current IRS publications.
| Filing Status | Approximate Range (recent years) | Notes |
|---|---|---|
| Single | $13,000 – $14,600+ | Adjusted annually for inflation |
| Married Filing Jointly | $26,000 – $29,200+ | Typically double the single amount |
| Married Filing Separately | $13,000 – $14,600+ | Same as single in most years |
| Head of Household | $19,000 – $21,900+ | Higher than single, lower than MFJ |
Amounts above are illustrative only. The IRS announces updated standard deduction amounts each fall for the following tax year. These figures shift with inflation and may also change through legislation. Always verify the current amount for your filing year at irs.gov.
Standard Deduction vs. Itemized Deductions
Every taxpayer must choose between taking the standard deduction and itemizing individual deductions. Itemized deductions include things like mortgage interest, state and local taxes (subject to a cap), charitable contributions, and certain medical expenses above a threshold.
If your total itemized deductions exceed the standard deduction for your filing status, itemizing produces a lower taxable income and may reduce your tax. If itemized deductions are smaller than the standard deduction, taking the standard deduction is generally more favorable.
The 2017 Tax Cuts and Jobs Act significantly increased the standard deduction amounts and capped the deductibility of state and local taxes (SALT) at $10,000. As a result, the share of taxpayers who itemize decreased substantially, and most wage earners now take the standard deduction. Provisions of that law are scheduled to sunset in coming years, which may change this dynamic — one more reason why rules noted on this site are subject to change.
Additional Standard Deduction for Age and Blindness
Taxpayers who are 65 or older, or who are legally blind, may be entitled to an additional standard deduction amount on top of the base. This additional amount also varies by filing status and is inflation-adjusted. Married taxpayers may claim additional amounts for each qualifying spouse.
Calculators that allow age inputs may incorporate this additional amount into their estimates; many do not. This is one reason calculator outputs can differ from actual tax liability for older taxpayers.
How Calculators Use the Standard Deduction
Most salary and take-home pay calculators assume the standard deduction for simplicity. When a calculator takes your gross salary and computes estimated federal tax, it typically subtracts the standard deduction for your filing status to arrive at taxable income, then applies bracket math to that taxable income figure.
If you itemize deductions rather than taking the standard deduction, your actual taxable income and tax liability will differ from what a standard-assumption calculator shows. This is a common source of discrepancy between calculator outputs and actual paycheck withholding or year-end tax liability.
Suppose a single filer has $65,000 in gross wages and the standard deduction for single filers in their tax year is $14,600.
Taxable income = $65,000 − $14,600 = $50,400. Federal income tax brackets are then applied to $50,400, not to $65,000.
If the calculator instead applied the bracket rates directly to $65,000 gross income without subtracting the standard deduction, the resulting tax estimate would be significantly higher than the actual federal tax owed. This illustrates why understanding what a calculator does — and does not — deduct matters for interpreting its output.
These figures are illustrative only and do not reflect the current IRS standard deduction amount for any specific tax year.
Dependents and the Standard Deduction
Taxpayers who can be claimed as dependents on another person's return have a different standard deduction calculation. In general, their standard deduction is limited to the greater of a fixed minimum amount or their earned income plus a fixed addition, up to the regular standard deduction ceiling. Calculators that do not ask about dependent status typically assume the full standard deduction, which may not apply to all users.