Marginal vs Effective Tax Rate, With a 2026 Worked Example

Your marginal tax rate is the rate on your last dollar of taxable income, and your effective tax rate is your total tax divided by your income. They are different numbers, and the effective rate is always lower than the marginal rate once you are above the first bracket. The IRS describes the system this way: "You pay tax as a percentage of your income in layers called tax brackets," and when your income reaches a higher bracket, "you pay the higher rate only on the part that's in the new tax bracket."

1. The 2026 brackets for a single filer

The IRS announced the tax year 2026 inflation adjustments on October 9, 2025. These figures apply to income earned in 2026, on returns filed in 2027. For a single taxpayer, taxable income is taxed in these layers:

The IRS lists the rates as "over" thresholds: 12% for incomes over $12,400, 22% over $50,400, 24% over $105,700, and so on. Married couples filing jointly have their own, wider thresholds, and so do heads of household. The 2026 standard deduction for a single filer is $16,100.

2. Step 1: get from pay to taxable income

The brackets apply to taxable income, not to your paycheck. For this example, assume a single filer whose only income is wages of $76,100, who takes the standard deduction and has no other adjustments or credits.

$76,100 - $16,100 = $60,000 of taxable income

3. Step 2: tax each layer separately

The filer is "in the 22% bracket," but only $9,600 of the income was taxed at 22%.

4. Step 3: read off the two rates

• Marginal rate: 22%. The next dollar of taxable income would be taxed at 22%.
• Effective rate on taxable income: $7,912 / $60,000 = 13.19%.
• Effective rate on the $76,100 of wages: $7,912 / $76,100 = 10.40%.

Which effective rate people quote depends on the denominator. Always check whether it is taxable income, adjusted gross income, or total pay.

5. What a raise does, in dollars

A common worry is that a raise could push you into a higher bracket and leave you with less money. The layer structure rules that out. If this filer earns $1,000 more of taxable income, the entire $1,000 sits in the 22% layer:

Tax on $61,000 minus tax on $60,000 = $220

The raise adds $220 of tax and $780 of after-tax income. The tax on the first $60,000 does not change.

The edge of a bracket works the same way. Consider a filer with exactly $50,400 of taxable income who gets $100 more. Only that $100 lands in the 22% layer, so the extra tax is $22. The only thing the higher bracket changed is the rate on that $100, which is $10 more than the $12 it would have cost at 12%. Nothing is recalculated on the $50,400 below it.

6. Where the simple picture stops

This example is deliberately narrow. It leaves out things that change a real tax bill:

• Payroll taxes. Social Security and Medicare withholding is separate from income tax brackets. The IRS lists 6.2% and 1.45% for the employee, and the Social Security part applies only up to a wage base of $184,500 in 2026.
• Credits and deductions. Credits reduce tax directly, and itemized or other deductions change taxable income.
• State and local income tax. The rates above are federal only.

For a number you can compare year to year, the effective rate on total income is usually the more honest summary. For decisions at the edge, such as whether extra income, a deduction, or a retirement contribution is worth it, the marginal rate is the one that applies.

7. Why the two numbers matter for decisions

The marginal rate is what you use to value one more dollar of income or deduction. A $1,000 deduction for this filer reduces tax by $220, not by $132 (13.2% of $1,000). The effective rate is what you use to describe your overall burden or to compare across years.

8. Key takeaways

• Brackets are layers. Only the income inside a layer is taxed at that layer's rate.
• Single filer, 2026, $60,000 taxable income: tax of $7,912, a 22% marginal rate, and a 13.19% effective rate on taxable income.
• A raise cannot lower your take-home pay by pushing you across a bracket line. The extra income is taxed at the higher rate, and everything below is unchanged.
• The standard deduction ($16,100 for a single filer in 2026) comes off before the brackets apply.
• Use the marginal rate to value extra income or a deduction, and the effective rate to describe your overall tax burden.

This is general information, not tax advice. Rates and thresholds are those the IRS published for tax year 2026, as of October 2026.