No, a Raise Cannot Push You Into a Bracket That Costs You Money

Every year, some number of people decline overtime, refuse a bonus, or turn down a promotion because they believe the extra income will push them into a higher tax bracket and leave them worse off. In the ordinary case, this cannot happen. The belief rests on a misunderstanding of how a progressive tax system applies its rates.

How the brackets actually stack

Think of your taxable income as water being poured into a series of buckets. The first bucket is taxed at 10%. When it is full, the overflow goes into a 12% bucket, then 22%, and so on. Filling a higher bucket never changes what happened in the lower ones.

Here are the 2024 federal brackets for a single filer. Note that these apply to taxable income, meaning your gross pay minus the standard deduction ($14,600 for single filers in 2024) or itemized deductions, and minus pre-tax contributions to accounts such as a traditional 401(k).

A worked example at $100,000

A single filer earning $100,000 with no adjustments takes the $14,600 standard deduction, leaving $85,400 of taxable income. That income fills three buckets:

This filer is 'in the 22% bracket,' but pays $13,841 in federal income tax. That is 16.2% of taxable income and just 13.8% of gross income. The 22% figure describes only the next dollar earned. It has never described the average.

Marginal versus effective, precisely

• Marginal rate: the rate applied to your next dollar of income. Here, 22%. It is the correct number for deciding whether extra work is worth it, or how much a deductible contribution saves you.
• Effective rate: total tax divided by income. Here, 13.8% of gross. It is the correct number for understanding your actual tax burden and comparing years.

What a $10,000 raise really does

Suppose that same filer receives a raise from $100,000 to $110,000. Taxable income rises from $85,400 to $95,400, still entirely inside the 22% band. Federal tax rises from $13,841 to $16,041, an increase of $2,200, which is exactly 22% of the additional $10,000. They keep $7,800.

Now consider the more dramatic case: crossing a bracket boundary. A filer whose taxable income moves from $191,950 to $192,950 crosses from the 24% band into the 32% band. Their federal tax rises from $39,110.50 to $39,430.50. The increase is $320 on $1,000 of new income, a 32% marginal rate applied to that $1,000 only. The first $191,950 is taxed exactly as it was before. There is no point at which taking the extra $1,000 leaves them with less money.

This holds at every boundary in the federal income tax schedule. The system is constructed so that additional income always produces additional take-home pay.

The cliffs that are real

The myth persists partly because a version of it is true in a few specific places, though not in the income tax brackets, but in benefit and credit phase-outs, where crossing a threshold can genuinely cost more than it gains. These are worth knowing about:

• Income-driven benefit cliffs. Programs such as Medicaid, ACA premium subsidies, SNAP, and childcare assistance often have hard eligibility thresholds. Earning one dollar over a limit can remove a benefit worth thousands, producing a genuine loss. This is a documented policy problem, and it is a benefits issue rather than a tax-bracket issue.
• Roth IRA contribution limits. Direct Roth IRA contributions phase out over a specific income range and stop entirely above it. Exceeding the limit does not cost you money already earned, but it removes an option.
• Social Security benefit taxation. As provisional income rises past certain thresholds, a larger share of Social Security benefits becomes taxable, which can push the effective marginal rate on a retiree's additional income notably higher than their nominal bracket.
• The Medicare IRMAA surcharge. Higher-income Medicare beneficiaries pay surcharges on Part B and Part D premiums, and these step up at hard thresholds rather than phasing in. Crossing one by a small amount raises premiums for the entire year.

The important distinction: none of these are income tax brackets. If someone tells you a raise made them worse off, the explanation is almost always one of the items above, a change in benefit eligibility, or a withholding change that altered their paycheck without altering their actual tax liability.

Withholding is not your tax bill

One common source of confusion deserves its own mention. A bonus is typically withheld at a flat supplemental rate, 22% federal for bonuses up to $1 million, rather than at your personal marginal rate. If your actual marginal rate is 12%, a bonus will appear over-taxed on the paystub, and people reasonably conclude the bonus pushed them into a higher bracket.

It did not. Withholding is an estimate collected during the year; your real liability is settled when you file, and any excess comes back as a refund. The paystub shows a prepayment, not a verdict.

Using this in practice

1. Use your marginal rate to value deductions. A $1,000 traditional 401(k) contribution saves you $220 at a 22% marginal rate and $320 at 32%. The higher your marginal rate, the more pre-tax contributions are worth.
2. Use your effective rate to understand your burden. It is the honest answer to 'what share of my income goes to federal income tax,' and it is nearly always far lower than people assume.
3. Never decline income to avoid a bracket. In the federal income tax system, this cannot leave you better off.
4. Do check benefit phase-outs if you are near one. This is the situation where the intuition is genuinely warranted, and where running the numbers before accepting extra income can be worth it.