A plain-English explanation of marginal rates, the standard deduction, and how to calculate exactly what you owe.
Here is something that surprises a lot of people: getting a raise that pushes you into a higher tax bracket does not mean all your income gets taxed at that higher rate. Not even close. The US tax system does not work that way — and once you understand how it actually works, your whole view of taxes changes.
Let me walk you through it clearly, with real numbers.
Think of the federal tax system as a series of buckets. As your income grows, it fills each bucket from the bottom up. The first bucket charges 10%. The second charges 12%. And so on, up to 37% for the highest earners.
Here is the key: only the income that falls into each bucket gets taxed at that bucket's rate. Your first $11,925 is always taxed at 10%, regardless of whether your total income is $40,000 or $400,000.
Before the brackets apply, you subtract the standard deduction from your gross income. For 2026, the standard deduction for single filers is $15,000. The brackets then apply to what's left — your taxable income.
| Tax rate | Taxable income range | Tax on this portion |
|---|---|---|
| 10% | $0 – $11,925 | 10 cents per dollar |
| 12% | $11,926 – $48,475 | 12 cents per dollar |
| 22% | $48,476 – $103,350 | 22 cents per dollar |
| 24% | $103,351 – $197,300 | 24 cents per dollar |
| 32% | $197,301 – $243,725 | 32 cents per dollar |
| 35% | $243,726 – $609,350 | 35 cents per dollar |
| 37% | Over $609,350 | 37 cents per dollar |
Let's say you earn $75,000 and you're filing as single. Here is exactly how your federal tax is calculated:
Step 1: Subtract the standard deduction
$75,000 − $15,000 = $60,000 taxable income
Step 2: Apply the brackets
Total federal income tax: $8,115
Your effective tax rate — the percentage of your total income that goes to federal tax — is $8,115 ÷ $75,000 = 10.8%. Not 22%. The 22% bracket only applies to the top slice of your income, not all of it.
These two terms cause a lot of confusion:
Your marginal tax rate is the rate that applies to your last dollar of income — the highest bracket you fall into. In the example above, that's 22%.
Your effective tax rate is the average rate across all your income — total tax divided by total income. In the example above, that's 10.8%.
When people panic about a raise "pushing them into a higher bracket," they are confusing marginal and effective rates. A raise that pushes you from the 12% bracket into the 22% bracket means only the dollars above the bracket threshold get taxed at 22%. The dollars below that threshold are still taxed at 10% and 12%.
A raise almost never leaves you worse off. The math simply does not work that way.
If you are married and file jointly, the bracket thresholds are roughly double those for single filers. The 2026 standard deduction for married filing jointly is $30,000. This is one reason why the "marriage bonus" exists for couples where one spouse earns significantly more than the other.
| Tax rate | Taxable income range (married) |
|---|---|
| 10% | $0 – $23,850 |
| 12% | $23,851 – $96,950 |
| 22% | $96,951 – $206,700 |
| 24% | $206,701 – $394,600 |
| 32% | $394,601 – $487,450 |
| 35% | $487,451 – $731,200 |
| 37% | Over $731,200 |
The IRS adjusts tax brackets annually for inflation. This is called "inflation indexing." Without it, a modest cost-of-living raise could push you into a higher bracket even though your purchasing power has not actually increased. The IRS uses the Chained Consumer Price Index (C-CPI-U) to determine the annual adjustment.
For 2026, most brackets shifted upward by roughly 2.8% compared to 2025 — reflecting the inflation adjustment. The standard deduction increased from $14,600 to $15,000 for single filers.
Understanding brackets helps with real decisions:
Remember that federal income tax is not the only tax on your paycheck. You also pay:
When you add everything up, most middle-income Americans pay an effective total rate (federal + FICA + state) of around 25–32% on their earnings — not the marginal federal rate everyone fixates on.
Sources: IRS Revenue Procedure 2025-61, IRS Publication 505. Rates shown are for the 2026 tax year. This article is for informational purposes only and does not constitute tax advice.