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
$22,334
$106,956
5%
$7,000
$20,654
$101,636
10%
$14,000
$18,974
$96,316
15%
$21,000
$17,350
$90,940
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 $106,956 for a single filer in a state with no income tax, based on 2026 federal brackets, Social Security and Medicare. That is $8,913.00 a month or $4,113.69 every two weeks.
What tax bracket is $140,000 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, 16.0%, because lower brackets apply first.
How much does a 401(k) save in tax?
Putting 10% ($14,000) into a traditional 401(k) lowers federal income tax by about $3,360 a year for a single filer, so take-home pay drops by less than the amount you save.