🧾 How Tax Brackets Actually Work (Marginal vs Effective Rate)

"I got a raise and it pushed me into a higher tax bracket, so I actually took home less" is one of the most common — and completely false — beliefs about how income tax works. Understanding why it's false requires understanding what a tax bracket actually taxes.

Tax Brackets Only Tax the Income Inside Them

A progressive tax system splits your income into slices, and each slice is taxed at its own rate — only the portion of income that falls inside a given bracket is taxed at that bracket's rate, not your entire income.

Someone earning $50,000 doesn't pay 22% on all $50,000 — they pay 10% on the first slice, 12% on the next slice, and 22% only on the portion above $44,000. Every dollar earned still adds money in your pocket, even after moving into a higher bracket.

Marginal Rate vs Effective Rate

The effective rate is what actually describes "how much of my income went to tax" — the marginal rate only tells you the rate on the last slice.

Why a Raise Never Reduces Take-Home Pay

Because only the income above each threshold is taxed at the higher rate, earning more always increases take-home pay — it just means each additional dollar in a new, higher bracket keeps a slightly smaller share than dollars in the bracket below it.

Deductions Reduce Taxable Income First

Pre-tax deductions (retirement contributions, certain benefits) reduce your taxable income before brackets are applied at all — which is why they can meaningfully lower your effective tax rate, not just your marginal one.

Step-by-Step: Estimate Your Tax

1. Enter your annual gross income
2. Select your filing status
3. Enter any pre-tax deductions
4. Review your estimated tax by bracket, your marginal rate, and your effective rate