Marginal vs Effective Tax Rate: Why a Raise Never Costs You Money
“I turned down a raise because it would push me into a higher tax bracket.” It is the most repeated piece of wrong advice in personal finance, and it costs people real money. Under a progressive system, earning one more dollar can never leave you with less after tax.
The confusion comes from mixing up two different numbers that both get called “your tax rate.”
Marginal rate: the rate on your next dollar
Your marginal rate is what the tax system charges on the next dollar you earn. If you are in the 22% bracket, a $1,000 raise is taxed at 22% — that raise costs you $220 in federal tax and you keep $780.
Crucially, moving into the 22% bracket does not re-tax the income below it. The dollars that fell in the 10% band are still taxed at 10%. The dollars in the 12% band are still taxed at 12%. Only the portion above the threshold pays 22%.
Effective rate: what you actually paid overall
Your effective rate is total tax divided by total income — the blended average across every bracket you touched. It is always lower than your marginal rate, and it is the number that actually describes your tax burden.
Watch it at the bracket edge
Here is a single filer in a state with no income tax, crossing the exact income where the 22% federal bracket begins ($66,500 of gross, once the $16,100 standard deduction is applied):
| Gross income | Federal tax | Effective rate | Net pay |
|---|---|---|---|
| $65,500 | $5,680 | 8.67% | $54,809 |
| $66,499 | $5,800 | 8.72% | $55,612 |
| $66,501 | $5,800 | 8.72% | $55,613 |
| $67,500 | $6,020 | 8.92% | $56,316 |
| $71,500 | $6,900 | 9.65% | $59,130 |
Look at the two rows either side of the threshold. Gross rises by $1,001 and net pay rises by $704. It went up. The effective rate creeps upward by a fraction of a percent — it does not jump to 22%, because the vast majority of the income is still taxed in the lower bands.
There is no income at which earning more leaves you with less. Not at any bracket boundary, in any state, under any filing status.
Where the myth comes from
It is not pure invention. Three real things create the impression:
Withholding overshoot on bonuses. Supplemental pay is often withheld at a flat 22% federal rate regardless of your actual bracket. If your effective rate is 12%, that bonus looks brutally taxed. You get the difference back at filing — the tax was never that high, only the withholding.
Benefit cliffs. These are real, and they are the legitimate kernel of truth. Income-tested benefits — subsidised health coverage, childcare assistance, some housing programmes — can drop sharply at a specific income. That is a cliff in benefits, not in tax, and it is worth checking if you are near a threshold.
Confusing the two rates. Someone hears “I am in the 24% bracket” and assumes 24% of everything is gone. Their effective rate is probably closer to 15%.
The number that matters for a decision
When you are weighing a raise, a second job, or overtime, the marginal rate is the one to use — it tells you what you keep from the additional income. When you are budgeting, the effective rate is the one to use, because it describes your whole bill.
Every salary page on this site shows the effective rate directly, and the bracket breakdown shows which marginal band your income lands in. Try $35/hr in Texas and then $40 to watch both move, or read the full gross-to-net walkthrough.