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
$16,470
$89,733
5%
$5,750
$15,205
$85,248
10%
$11,500
$13,940
$80,763
15%
$17,250
$12,675
$76,278
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 $89,733 for a single filer in a state with no income tax, based on 2026 federal brackets, Social Security and Medicare. That is $7,477.71 a month or $3,451.25 every two weeks.
What tax bracket is $115,000 in?
For a single filer, after the standard deduction the top dollars are taxed at 22%. The average federal income tax rate is much lower, 14.3%, because lower brackets apply first.
How much does a 401(k) save in tax?
Putting 10% ($11,500) into a traditional 401(k) lowers federal income tax by about $2,530 a year for a single filer, so take-home pay drops by less than the amount you save.