How much does a fill-up really cost, once you add the income tax behind it?
The pump price already includes the tax — 52 cents a gallon on average, before you even get to the register.
Unlike almost every other purchase, gas tax isn't added at checkout — it's baked into the price on the sign. Federal tax is a flat 18.4 cents/gallon everywhere (unchanged since 1993); state taxes and fees add another 33.3 cents on average nationally, ranging from just 9 cents in Alaska to 70.9 cents in California. Most states don't charge general sales tax on top of that — only about 10 do.
- The fill-up cost you enter already includes all embedded fuel taxes — there's no separate tax line added here, matching how most states treat gasoline.
- About 10 states (including California, Connecticut, and New York) also apply general sales tax on top of the pump price — not modeled here, a documented simplification for the majority-treatment states.
State gas tax ranges from about 9 cents a gallon to over 70 — but it is already inside the pump price you type in, so entering your local price captures it. Nothing is added on top, which is why the spend side reads zero.
The income tax in this figure is still computed from Texas and your filing status.
to cover a gas fill-up
- Income tax (federal, FICA, state)30%$19
- Gas fill-up70%$45
- Income tax (federal, FICA, state)
- Gas fill-up
Data for nerdssources, confidence, assumptions
Where each number comes from
| Component | Amount | Confidence |
|---|---|---|
| Item price | $45.00 | Your figureHigh confidence. You supplied this, so it is exact by definition. |
| Income tax to earn it | $18.97 | StatutoryHigh confidence. This number is the law — federal, FICA and state tax rates are published rates, so the only real risk is staleness. |
Jurisdiction applied
- State:
TX - Local income tax: none selected
Assumptions
- The fill-up cost you enter already includes all embedded fuel taxes — there's no separate tax line added here, matching how most states treat gasoline.
- About 10 states (including California, Connecticut, and New York) also apply general sales tax on top of the pump price — not modeled here, a documented simplification for the majority-treatment states.
Sources
If this is a habit
$33,264 over 10 yrsGas fill-up, every week — $3,326 of income every year, and 2 work weeks of your life.
Year by year
| Year | Spent | Invested instead |
|---|---|---|
| 1 | $2,340 | $2,340 |
| 2 | $4,680 | $4,844 |
| 3 | $7,020 | $7,523 |
| 4 | $9,360 | $10,389 |
| 5 | $11,700 | $13,457 |
| 6 | $14,040 | $16,739 |
| 7 | $16,380 | $20,250 |
| 8 | $18,720 | $24,008 |
| 9 | $21,060 | $28,029 |
| 10 | $23,400 | $32,330 |
Prices and wages are held at today's levels, and the return above is inflation-adjusted to match — consistent by design. The invested-instead line assumes the cash is contributed at the end of each year and left alone; it is an alternative use of the same money, never an extra cost on top.
Your position in the tax system
29.65% on the next dollarEvery extra dollar you earn is taxed at your marginal rate, not your average one — which is why a purchase costs more to fund than a paycheck stub suggests.
Marginal rates are read in gross-income terms: below the standard deduction an extra dollar of pay adds nothing to taxable income, so the true rate there is 0%, not the lowest bracket's. Excludes pre-tax deductions (401(k), HSA), which would lower all three.
Same purchase, different state
TX is #7 of 51Only income tax and sales tax move — the sticker price is held constant, so this is the part of the cost your address actually controls. Spread across all 51: $9, from Alaska to Oregon.
- $64
- Texasyou$64
- $73
Click a state name to compare against somewhere else.
Where every dollar goes
30% never reaches youThe $63.97 you must earn, followed to where it lands. Hover a band to isolate it.
- Federal income tax$14.07
- FICA (Social Security + Medicare)$4.90
- Gas fill-up$45.00
Each tax layer is the extra tax this purchase causes — that layer's tax at your income subtracted from its tax at your income plus the gross-up — so bracket boundaries the purchase straddles are handled correctly rather than smoothed over with an average rate.
Is a raise actually a raise?
you keep 70%A raise arrives on top of everything you already earn, so it is taxed at your marginal rate — not the average rate on your whole salary.
Federal, FICA, state and any local income tax — no pre-tax deductions, benefit changes, or payroll withholding quirks, all of which move the real figure. Moving into a higher bracket never taxes the income below the threshold: only the dollars above it pay the higher rate.