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
$43,304
$166,770
5%
$11,250
$40,034
$158,790
10%
$22,500
$37,334
$150,240
15%
$33,750
$34,634
$141,690
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 $166,770 for a single filer in a state with no income tax, based on 2026 federal brackets, Social Security and Medicare. That is $13,897.46 a month or $6,414.21 every two weeks.
What tax bracket is $225,000 in?
For a single filer, after the standard deduction the top dollars are taxed at 32%. The average federal income tax rate is much lower, 19.2%, because lower brackets apply first.
How much does a 401(k) save in tax?
Putting 10% ($22,500) into a traditional 401(k) lowers federal income tax by about $5,970 a year for a single filer, so take-home pay drops by less than the amount you save.