A $5,000 sign-on bonus does not mean $5,000 landing in your checking account. Unlike your agency's housing or meals stipend, which can be paid tax-free when you have a valid tax home, every dollar of a sign-on, completion, extension, or referral bonus is ordinary taxable income — full stop. Bonuses get bundled with stipends in a recruiter's pitch, but the IRS treats them completely differently, and that difference shows up the moment the money hits your account.
For a W2 nurse, a bonus runs through payroll like any other wage, using a flat federal withholding rate set aside specifically for payments like this. For a 1099 contractor, nothing gets withheld at all — the full tax bill lands on you at filing time, or sooner if you owe enough to require estimated payments. Here's how each track works, plus a numeric example showing why a $3,000 bonus rarely puts $3,000 in your pocket.
Bonuses Are Taxable Wages, Not Tax-Free Stipends
Per diem housing and meal stipends can sometimes be excluded from taxable income because the IRS treats them as reimbursement for the added cost of living away from your tax home, not as pay for services — our guide to taxable vs. non-taxable travel nurse pay covers that distinction in full. A bonus works differently. Sign-on, completion (often tied to finishing a contract without call-offs), extension, and referral bonuses are all compensation for work, not reimbursement for an expense. That makes them ordinary wages if you're paid W2, or ordinary self-employment income if you're paid 1099 — there's no dollar threshold or carve-out that makes a travel nursing bonus tax-free. See our travel nurse taxes 101 guide for how bonuses fit into the bigger tax picture alongside base pay and stipends.
How Federal Withholding Works on a W2 Bonus
When your agency pays a bonus, the IRS classifies it as a supplemental wage — the same category covering overtime, commissions, and back pay. Under IRS Publication 15 (Circular E), employers generally withhold federal income tax on supplemental wages at a flat 22%, regardless of your actual bracket, rising to 37% on any amount above $1 million in supplemental wages from one employer in a calendar year (a threshold essentially no travel nurse will hit). FICA tax — 6.2% for Social Security and 1.45% for Medicare — is withheld on top, exactly as on your regular paychecks, and your state then adds its own withholding using whatever method its payroll rules specify.
Withholding Isn't Your Final Tax Bill
The 22% flat rate is a withholding shortcut, not a tax rate assigned specifically to bonuses. At filing, the bonus gets added to your total wages for the year and taxed at your actual marginal rate under the ordinary federal brackets. If your marginal rate sits below 22%, the flat withholding over-collected, and the difference shows up as a bigger refund or a smaller balance due. If it runs above 22% — common for nurses stacking back-to-back high-paying contracts, or with a working spouse's income in the household — the withholding under-collects, and you'll owe the difference at tax time. Two nurses receiving an identical bonus can see very different effects on their eventual refund, because what each ultimately owes depends on total income and deductions for the whole year, not the bonus in isolation.
1099 Contractors Get No Withholding At All
Some travel nurses take assignments as independent contractors instead — our W2 vs. 1099 for travel nurses guide covers the broader tradeoffs. Agencies paying 1099 contractors don't withhold federal income tax, state income tax, or FICA from any payment, bonuses included, so the full face amount hits your account. You still owe self-employment tax of 15.3% (12.4% Social Security, 2.9% Medicare) on your net earnings, plus ordinary income tax at your marginal rate.
Because nothing is withheld, the IRS expects you to cover that liability through quarterly estimated payments using Form 1040-ES if you expect to owe $1,000 or more for the year. Skipping those payments can trigger an underpayment penalty even if you pay in full by April. Run your numbers through our W2 vs. 1099 calculator or contract analyzer before you sign, so a bonus doesn't catch you off guard either way.
A $3,000 Completion Bonus: W2 vs. 1099
Say your agency pays a $3,000 completion bonus at the end of a 13-week contract, and you're a W2 employee in a state with a flat 5% income tax. Federal supplemental withholding takes 22% ($660), FICA takes 7.65% ($229.50), and state withholding takes roughly 5% ($150). Altogether, about $1,039.50 gets withheld before the money reaches you, leaving a net deposit of roughly $1,960 — even though the contract technically promised $3,000.
Now say the same $3,000 bonus is paid as 1099 income instead. Nothing is withheld, so the full $3,000 lands in your account — but you still owe roughly 15.3% in self-employment tax (about $424, since SE tax applies to 92.35% of net earnings) plus ordinary income tax at your marginal rate, easily a few hundred dollars more once federal and state are combined. The real difference isn't the total you'll eventually owe; it's timing. The W2 nurse's obligation is mostly handled automatically the moment the bonus is paid; the 1099 nurse gets the full amount up front and has to set aside a comparable chunk themselves, usually through a quarterly payment, or face a much larger bill in April.
Never assume a bonus's face value is what you'll actually bank. Whether you're W2 or 1099, budget as if a quarter to a third of any bonus is already spoken for by taxes, and if you're 1099, move that portion into a separate account the day the payment arrives instead of waiting for a quarterly due date to catch up with you.
Frequently Asked Questions
Is a sign-on bonus taxed differently from a completion bonus?
No. The IRS treats sign-on, completion, extension, and referral bonuses identically — all are supplemental wages for W2 employees or self-employment income for 1099 contractors. The label your agency uses doesn't change the tax treatment.
Why did my agency withhold 22% instead of my normal tax rate?
Employers are permitted to use the IRS's flat 22% supplemental wage rate for bonuses instead of your regular W-4 calculation. It's a withholding shortcut, not your actual tax rate — your real liability is set when you file, based on total income for the year.
Do I owe Social Security and Medicare tax on a bonus?
Yes. FICA applies to bonuses the same way it applies to regular wages for W2 employees. For 1099 contractors, the equivalent is self-employment tax — 15.3% of net self-employment earnings, covering both the Social Security and Medicare portions.
Can my agency withhold my bonus a different way?
Some employers use the aggregate method, combining the bonus with your regular paycheck for that pay period and withholding based on your W-4 elections as if it were one larger check. That can withhold more or less than the flat 22% method, but it does not change your ultimate tax liability.
What happens if I skip estimated payments on a 1099 bonus?
You risk an IRS underpayment penalty, assessed separately from any tax you owe, even if you pay your full balance by the filing deadline. Quarterly estimated payments are how the IRS expects self-employed travel nurses to pay tax throughout the year instead of all at once.
Can my recruiter structure my bonus to avoid taxes?
No. There's no legal way to make a genuine bonus tax-free by relabeling it — the IRS looks at the substance of the payment, not what it's called on your contract. What you can control is your withholding elections and, if you're 1099, your estimated payment schedule.
Disclaimer: This article is for educational purposes only and is not tax or legal advice. Bonus withholding and self-employment tax rules depend on individual facts and circumstances. Consult a CPA or enrolled agent who specializes in travel healthcare taxation before making decisions about how your bonuses are withheld or reported.