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
$48,104
$176,617
5%
$12,000
$44,264
$168,457
10%
$24,000
$40,574
$160,147
15%
$36,000
$37,694
$151,027
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 $176,617 for a single filer in a state with no income tax, based on 2026 federal brackets, Social Security and Medicare. That is $14,718.08 a month or $6,792.96 every two weeks.
What tax bracket is $240,000 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, 20.0%, because lower brackets apply first.
How much does a 401(k) save in tax?
Putting 10% ($24,000) into a traditional 401(k) lowers federal income tax by about $7,530 a year for a single filer, so take-home pay drops by less than the amount you save.