Tax guide
Owe taxes after a raise?
You got a raise. You expected a bigger paycheck. You did not expect a tax bill in April. Here is why a raise can leave you owing money, and how to prevent it.
Key takeaway
A raise pushes part of your income into a higher tax bracket. Your employer increases withholding, but the increase may not cover the full jump in your marginal rate, especially if the raise came mid-year.
How progressive brackets work
The U.S. tax system taxes income in layers. Only the income above each bracket threshold gets taxed at the higher rate. A raise does not tax all your income at a higher rate. It only taxes the portion that crosses into the next bracket.
For example, the 22% bracket starts at $48,476 for single filers (2025). If you earn $45,000 and get a $10,000 raise, only $6,524 of the raise is taxed at 22%. The rest stays in the 12% bracket. You do not suddenly pay 22% on everything.
2025 federal tax brackets (single filer)
| Rate | Taxable income |
|---|---|
| 10% | $0 to $11,925 |
| 12% | $11,926 to $48,475 |
| 22% | $48,476 to $103,350 |
| 24% | $103,351 to $197,300 |
| 32% | $197,301 to $250,525 |
| 35% | $250,526 to $626,350 |
| 37% | Over $626,350 |
Example: Raise from $95,000 to $115,000 (single filer, 2025)
Before the raise: Taxable income after $15,000 standard deduction: $80,000. Tax: about $12,514. Employer withholds $12,514 across the year.
After the raise: Taxable income: $100,000. Tax: about $16,914. The $20,000 raise adds $4,400 in tax.
The timing problem: If the raise started in July, your employer only withholds the higher amount for 6 months. The first 6 months were withheld at the old rate. You may be short by about $2,200.
The gap: $2,200 owed because mid-year withholding did not catch up.
Why mid-year raises are the problem
When you start the year at a lower salary, your employer withholds based on that lower amount for the first part of the year. After the raise, the employer adjusts withholding going forward, but does not go back and adjust the earlier paychecks.
The IRS calculates your tax based on total annual income. If your employer under-withheld for the first half of the year, the second half has to make up the difference. Often it does not.
Bonuses make this worse. A $10,000 bonus is typically withheld at a flat 22% supplemental rate. If your marginal rate is 24% or higher, the withholding falls short.
How to close the gap
After a raise, updating your W-4 may help. Calculate your expected total annual income (old salary for the months before the raise, new salary for the months after). Then calculate your total tax liability and compare it to your projected total withholding.
If there is a gap, add extra withholding on Line 4(c). Divide the gap by the number of remaining paychecks this year.
For next year, recalculate based on the full-year new salary. The gap is usually smaller when you earn the higher salary for the full year, because the employer withholds at the higher rate from January.
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Common questions
Can I end up with lower net pay after a raise?
No. Progressive tax brackets mean you always take home more money after a raise. The higher rate only applies to the income above the bracket threshold, not your entire income. You will never lose money by earning more.
What about promotions with a new employer?
Same principle. Your new employer withholds based on your new salary as if you earned it all year. But your old employer only withheld based on the lower salary for the months you worked there. The combined withholding may fall short of your full-year tax liability.