how much tax do i pay on a second job

[GiaLynn]

If you’re working a second job in 2026, the extra income is taxed at your marginal tax rate—the highest bracket your total earnings fall into. That means you won’t pay a flat “second job” rate; instead, the additional dollars are added on top of your primary income and taxed accordingly. For example, if your main job puts you in the 22% bracket, your second job earnings will also be taxed at 22% up to the next bracket threshold, then 24% beyond that.

Here’s a quick breakdown of 2026 federal income tax brackets for a single filer (approximate, based on inflation adjustments):

Taxable Income Range	Marginal Rate
$0 – $11,925	10%
$11,926 – $48,475	12%
$48,476 – $103,350	22%
$103,351 – $197,300	24%
$197,301 – $250,525	32%
$250,526 – $626,350	35%
Over $626,350	37%

Your second job also triggers additional payroll taxes. Social Security tax (6.2%) applies only up to the wage base ($168,600 in 2026), so if your combined income from both jobs is under that cap, you’ll pay the full 6.2% on the second job too. Medicare tax (1.45%) has no cap, and if your total earnings exceed $200,000 (single), an extra 0.9% Medicare surtax kicks in.

Don’t forget state income tax—most states tax second job income at the same marginal rate as your primary income. A few states (like Texas, Florida, Nevada) have no state income tax, so you’d only face federal and payroll taxes.

To avoid a big tax bill at year-end, adjust your withholding on the second job’s W-4. Use the IRS Tax Withholding Estimator or set a fixed additional amount per paycheck. Many people underestimate the impact of a second job, so planning ahead saves headaches.

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[SanValeria]

I picked up a weekend retail gig last year, and honestly, I was shocked at how much got taken out of my first paycheck. My main job puts me in the 22% bracket, so I expected around 22% for taxes, but I forgot about the 7.65% for Social Security and Medicare. Plus state tax (I’m in California, so that’s another 9.3% for my bracket). All together, about 39% of that second paycheck disappeared. I now set aside 30% of each second-job check into a separate savings account so I’m not scrambling in April.

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[CatherineDella]

I do freelance consulting on top of my full-time role. The tax complexity is real because no one withholds for me. I have to pay self-employment tax (15.3% on net earnings up to the Social Security cap) plus my regular income tax. My strategy: make quarterly estimated payments to the IRS. I use a simple spreadsheet that tracks my marginal rate (24%) plus the self-employment tax, so I send about 35% of each freelance payment to the IRS. It’s easier than a big surprise.

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[VanessaRose]

As someone who regularly hires part-time workers who already have full-time jobs, I see a lot of confusion about tax withholding. If your second job is W-2 employment, your employer will withhold based on the W-4 you fill out. Many people claim “Single” or “Married” without considering their combined income, which leads to under-withholding. I always tell new hires to check the “Multiple Jobs” worksheet on the W-4 or use the