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
$4,420
$46,373
5%
$2,750
$4,090
$43,953
10%
$5,500
$3,760
$41,533
15%
$8,250
$3,430
$39,113
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 $46,373 for a single filer in a state with no income tax, based on 2026 federal brackets, Social Security and Medicare. That is $3,864.38 a month or $1,783.56 every two weeks.
What tax bracket is $55,000 in?
For a single filer, after the standard deduction the top dollars are taxed at 12%. The average federal income tax rate is much lower, 8.0%, because lower brackets apply first.
How much does a 401(k) save in tax?
Putting 10% ($5,500) into a traditional 401(k) lowers federal income tax by about $660 a year for a single filer, so take-home pay drops by less than the amount you save.