Pre-tax retirement savings shrink your taxable income, so each dollar saved costs you less than a dollar of take-home pay.
401(k) rate
Saved per year
Federal tax
Take-home
0%
$0
$36,734
$148,927
5%
$10,000
$34,334
$141,327
10%
$20,000
$31,934
$133,727
15%
$30,000
$29,534
$126,127
With state income tax
State tax depends on where you live. These rows show the effect of a flat rate on top of federal taxes; plug your own state's rate into the paycheck calculator.
About $148,927 for a single filer in a state with no income tax, based on 2026 federal brackets, Social Security and Medicare. That is $12,410.58 a month or $5,727.96 every two weeks.
What tax bracket is $200,000 in?
For a single filer, after the standard deduction the top dollars are taxed at 24%. The average federal income tax rate is much lower, 18.4%, because lower brackets apply first.
How much does a 401(k) save in tax?
Putting 10% ($20,000) into a traditional 401(k) lowers federal income tax by about $4,800 a year for a single filer, so take-home pay drops by less than the amount you save.