How Tax Brackets Work in the US

What Are Tax Brackets? The Foundation

A tax bracket is an income range paired with a tax rate. The US uses a progressive tax system — rates increase as income rises, but only on the income within each bracket, not on everything you've earned.

Think of it like steps on a staircase. Each step has its own rate. You only pay that rate on the income that sits on that particular step — not on the steps below it.

The 2026 Tax Brackets for Single Filers (from IRS Publication 15-T):

- 10%: $0 – $11,925

- 12%: $11,925 – $48,475

- 22%: $48,475 – $103,350

- 24%: $103,350 – $197,300

- 32%: $197,300 – $250,525

- 35%: $250,525 – $626,350

- 37%: Over $626,350

One important thing to keep in mind: these ranges apply to taxable income — your gross income minus the standard deduction ($15,000 for single filers in 2026) or itemized deductions, whichever is larger. If you earn $75,000 and take the standard deduction, the brackets apply to $60,000, not $75,000.

Marginal Rate vs. Effective Rate: The Most Important Distinction

There are two tax rate numbers that matter for every financial decision you make — and confusing them is the root of almost every tax misconception I've encountered.

Marginal Tax Rate

Your marginal tax rate is the rate applied to the next dollar of income you earn — or equivalently, the bracket your highest dollar of income falls into. If you're a single filer with $70,000 in taxable income in 2026, your marginal rate is 22% (because $70,000 falls within the $48,475–$103,350 bracket).

Use the marginal rate when you're calculating:

- The tax cost of additional income — a bonus, freelance project, or raise

- The tax savings from a pre-tax deduction like a 401(k) or HSA contribution

- Whether a deductible business expense is worth pursuing

Effective (Average) Tax Rate

Your effective tax rate is total federal income tax divided by total taxable income (or gross income, depending on the calculation). It's your blended rate across all brackets — and it's always lower than the marginal rate.

For $70,000 in taxable income:

- 10% on $11,925 = $1,193

- 12% on ($48,475 − $11,925) = $36,550 → $4,386

- 22% on ($70,000 − $48,475) = $21,525 → $4,736

- Total tax = $10,315

- Effective rate = $10,315 ÷ $70,000 = 14.7%

That's not 22%. It's 14.7%. Use the effective rate when comparing your overall burden year-over-year, or when thinking about how taxes fit into your overall financial picture.

Putting It All Together: Three Real-World Examples

Example 1: The $50,000 Worker — "Am I Really in the 12% Bracket?"

Alex earns $50,000 and files as single. After the $15,000 standard deduction, taxable income is $35,000.

- 10% on $11,925 = $1,193

- 12% on $23,075 = $2,769

- Total federal tax: $3,962 | Effective rate: 7.9% on gross income

Alex is "in the 12% bracket" by marginal rate — but the effective federal rate on gross income is under 8%. The 12% rate applies only to income between $11,925 and $35,000 (after the standard deduction).

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Example 2: The $100,000 Worker — "Will My Bonus Be Crushed by Taxes?"

Jordan earns $100,000 and receives a $10,000 year-end bonus. They're anxious that moving into a higher bracket will wipe out most of the bonus.

Without the bonus: taxable income = $85,000 (already in the 22% bracket)

With $10,000 bonus: taxable income = $95,000 (still in the 22% bracket — no bracket change at all)

The bonus is taxed at the 22% marginal rate:

$10,000 × 22% = $2,200 in additional federal tax

Jordan takes home $7,800 from a $10,000 bonus. No bracket jump, no horror story.

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Example 3: The Raise That Actually Crosses a Bracket

Sam earns $95,000 gross (taxable income $80,000, firmly in the 22% bracket) and gets a $30,000 raise, bringing gross to $125,000. Taxable income jumps to $110,000 — crossing into the 24% bracket at $103,350.

Only the income above $103,350 is taxed at 24%. The rest of the raise is still at 22%:

- $23,350 of the raise × 22% = $5,137

- $6,650 of the raise × 24% = $1,596

- Total additional federal tax from the raise: $6,733

Sam's net increase from the $30,000 raise (federal only): $30,000 − $6,733 = $23,267 more per year. Sam is unambiguously better off.

Debunking the "Raise Into a Higher Bracket" Horror Story

The most persistent tax myth in America: "If I earn more and move into a higher bracket, I'll take home less money." It's mathematically impossible in a progressive tax system. Let me show you why.

Suppose the 22% bracket begins at $48,475 of taxable income. You're currently at $48,000 taxable and get a $1,000 raise, pushing you to $49,000:

- The $475 from $48,000 to $48,475 is still taxed at 12%

- Only the $525 above $48,475 is taxed at 22%

- Additional tax on the $1,000 raise: ($475 × 12%) + ($525 × 22%) = $57 + $115.50 = $172.50

- Your net gain from the raise: $827.50

You always take home more after a raise. Always. The marginal rate is never 100%. Crossing a bracket means paying a higher rate on incremental income — never on your existing income.

Why Does This Myth Persist?

The most common source of confusion is supplemental wage withholding. When an employer pays a large bonus, they may withhold at the flat 22% supplemental rate regardless of your actual bracket. If you're in the 12% bracket and see 22% withheld from a bonus, that overwithheld amount comes back as a refund when you file. The withholding rate and your actual tax owed are two different things — and conflating them is how the myth survives.

Using Bracket Knowledge to Optimize Your Taxes

Once you know exactly where you sit in the bracket structure, several planning strategies become available that most people never use.

1. Traditional Retirement Contributions at Your Highest Rate

Every dollar into a traditional 401(k) removes a dollar from your top marginal bracket. In the 22% bracket, a $10,000 contribution saves $2,200 in federal taxes. If you can push taxable income below $48,475 (the 22% threshold), your marginal rate drops and your savings ratio changes.

2. Roth Conversion in Unusually Low-Income Years

Career transition, sabbatical, business losses — any year your income is temporarily suppressed, you might find yourself in the 10% or 12% bracket. That's the optimal window to convert traditional IRA funds to Roth: you pay taxes now at a historically low rate rather than deferring into a potentially higher-rate future.

3. Tax-Loss Harvesting at the Right Bracket Level

If capital gains would push you into the 15% long-term capital gains bracket, harvesting capital losses from underperforming positions offsets those gains. For taxpayers with taxable income below $47,025 (single, 2026), long-term capital gains face a 0% federal rate — a planning opportunity worth knowing about.

4. "Bracket Filling"

If you're in the 12% bracket with room before the 22% threshold kicks in, consider accelerating income into the current year — Roth conversions, taking long-term capital gains — at 12% rather than waiting and potentially paying 22%+ in future years when income rises.

5. Business Income Timing for the Self-Employed

Self-employed individuals have more control over when income is recognized. Deferring a December invoice to January can shift income into the next tax year. When you're tracking close to the top of a bracket, that timing decision can save real money.

How Tax Brackets Change Over Time

Federal tax brackets aren't fixed — two forces move them every year.

Inflation Adjustments

The IRS adjusts bracket thresholds annually using the Chained Consumer Price Index (C-CPI-U). This prevents "bracket creep" — when inflation-driven wage increases push workers into higher brackets even though their real purchasing power hasn't changed. From 2025 to 2026, most bracket thresholds increased by approximately 2.8%.

Legislative Changes

Congress can restructure both the number of brackets and the rates themselves. The 2017 Tax Cuts and Jobs Act (TCJA) reduced the top marginal rate from 39.6% to 37% and adjusted all thresholds. Key TCJA provisions are scheduled to sunset at the end of 2025 unless renewed — meaning 2026 rates could be affected depending on Congressional action. The rates shown in this article reflect currently enacted law.

A Historical Note

For perspective: the top federal marginal rate hit 94% during World War II. In 1963 it was still 91%. Ronald Reagan's 1986 tax reform brought it down to 28%. Today's 37% top rate is historically moderate — though who it applies to and at what income level has shifted enormously over the decades. The current progressive structure has been in place in broadly similar form since the 1980s.

Frequently Asked Questions