See exactly how much a deduction saves you in real dollars — based on your actual tax bracket.
Annual Gross Income ($)
$
Filing Status
State Income Tax Rate (%)
%
Deduction Amount ($)
$
Tax Savings on Deduction
$0
Real dollars back in your pocket
Marginal Rate
—
federal bracket
Effective Rate
—
actual avg rate
Federal Tax Saved
—
on this deduction
State Tax Saved
—
on this deduction
Total Tax (Before)
—
fed + state
Total Tax (After)
—
with deduction
How Tax Deductions Actually Work
A $6,500 deduction doesn't save you $6,500. It reduces your taxable income by $6,500. The actual savings depend on your marginal tax rate — the rate on your last dollar of income.
Tax Savings = Deduction Amount × (Marginal Federal Rate + State Rate)
Example: $6,500 deduction at 22% federal + 5% state
= $6,500 × 27% = $1,755 saved
Best tax deductions to maximize (2026)
401(k) contribution: Up to $23,500 pre-tax — saves $5,170 at 22% bracket
Mortgage interest: Deductible if itemizing (must exceed $15,000 standard deduction)
Student loan interest: Up to $2,500 above-the-line deduction
Home office: For self-employed — $5/sq ft simplified method or actual expenses
Deduction vs. tax credit — what's the difference?
A deduction reduces your taxable income. A tax credit reduces your actual tax bill dollar-for-dollar. A $1,000 credit at any bracket saves $1,000. A $1,000 deduction at 22% saves only $220. Credits are almost always more valuable.
Tax Deduction FAQ
Itemize only if your total deductions exceed the standard deduction: $15,000 (single), $30,000 (married), $22,500 (HOH) in 2026. Most people take the standard deduction. Common itemized deductions: mortgage interest, state/local taxes (SALT, capped at $10k), charitable donations, large medical expenses.
Above-the-line deductions (adjustments to income) reduce your AGI regardless of whether you itemize — 401(k), HSA, student loan interest, self-employment tax. Below-the-line deductions only help if you itemize — mortgage interest, charitable giving. Above-the-line deductions are better because they reduce both income tax AND AGI-based phase-outs.
The 2026 401(k) limit is $23,500 ($31,000 if age 50+). At a 22% federal bracket + 5% state, maxing out saves approximately $6,345 in taxes. Your take-home only decreases by $17,155, but your retirement account grows by the full $23,500 — plus any employer match.