RSU vest and bonus same paycheck — normal?

Common at companies that pay annual bonus with quarterly equity vest cycles.

Aggregate withholding with RSU and bonus?

Pub. 15 allows combining supplemental wages with regular wages for withholding on that check — may increase withholding vs isolated vest.

Is bonus taxed differently than RSU on same stub?

Both are ordinary wages. Withholding method applies to the paycheck total, not different tax categories.

22% on vest plus bonus?

Flat supplemental may apply to combined supplemental amount if employer uses that method — verify on stub.

Same paycheck vs same year bonus and RSU?

Same paycheck affects one period withholding. Same year stacking affects marginal bracket — see bonus same year guide too.

FICA on bonus and RSU together?

Both count toward FICA wages. Social Security stops after wage base reached.

Negative net pay with bonus and vest?

Withholding can exceed period salary cash — employer may reduce future checks or you owe balance.

Sell-to-cover plus bonus cash?

Vest may sell shares for tax; bonus is separate cash — both increase gross wages.

Which guides pair with this?

Aggregate withholding, RSU and bonus same year, pay stub after vest, tech sales role guide.

RSU tax, withholding gap, annual RSU income estimator with bonus in income.

RSU Vest & Bonus Same Paycheck | Aggregate Withholding

Your pay stub shows a bonus and an RSU vest in the same pay period — gross pay spiked twice — and you want to know how payroll withholds when supplemental wages combine, whether aggregate withholding applies, and if you still owe tax in April.

Start here

When an and cash bonus hit the same paycheck, payroll may treat both as or use aggregate that combines them with your regular salary for that period. IRS Pub. 15 allows different methods — flat supplemental rate on combined supplemental amount, or aggregate with regular wages. Total gross includes salary, bonus, and . on the check may look higher than a alone but still may not match your full-year marginal tax when other vests and salary continue through December.

What you need before using this

Pay stub showing bonus and lines.
confirmation and bonus letter or HR memo.
Form W-4 on file.
Prior pay stub without bonus or for comparison.
Employer payroll FAQ on supplemental vs aggregate if available.

Aggregate vs supplemental withholding is an employer payroll election within IRS rules.

Why this happens

Companies often pay annual bonuses in the same cycle as quarterly vests — March or December common.

Both bonus and are taxable wages in the pay period they post.

Aggregate recalculates on total wages including regular salary for that check.

Flat supplemental method may apply 22% or 37% to combined above regular salary portion.

Higher on one check does not automatically mean full-year tax is prepaid.

FICA applies to bonus and — Social Security until wage base, Medicare on all.

State tax on combined check varies by state supplemental rules.

Net pay may go sharply negative on paper if exceeds salary portion — rare but possible.

on is separate from bonus cash — bonus is cash wages, adds plus share settlement.

at year-end sums all bonus and wages — one check is not isolated for annual tax.

Tech sales roles often see commission-like bonus plus on same December stub.

Aggregate method can produce higher on combined check than separate check would.

Employees confuse high December with no April bill — other income matters.

Bonus gross-up policies at some employers interact with on same check differently.

Year-end true-up may follow bonus-plus- month if payroll reconciles annually.

What to check

Pay stub labels: BONUS, , SUPP, STOCK separate lines.
Gross wages sum: salary + bonus + .
Federal total vs supplemental rate on supplemental portion.
Whether stub notes aggregate vs supplemental method.
FICA on full gross including bonus and .
Net shares deposited from vs cash bonus net.
YTD withheld after combined check vs annual estimate.
gap calculator with bonus and all vests.

Assuming a big withholding check means RSU and bonus tax is fully covered

One fat paycheck helps but annual liability depends on total wages all year. A December bonus-plus- check does not prepay tax on earlier under-withheld vests or predict next year's bracket.

What to check in your documents

Combined pay stub PDF.
confirmation and bonus notification.
Prior quarter stubs for comparison.
Boxes 1, 2, and 16 when issued.
Annual compensation statement if employer provides.

December bonus plus quarterly RSU on one stub

Illustration only, not your tax situation.

Reese earns $12,000 salary for the period, a $15,000 annual bonus, and vests $20,000 on the same December pay stub — $47,000 gross. Payroll uses aggregate on the full check. Federal jumps sharply. Reese still runs gap with full-year $180,000 salary plus four vests because March used flat 22% supplemental when salary was lower YTD.

Questions people ask

RSU vest and bonus same paycheck — normal?: Common at companies that pay annual bonus with quarterly equity cycles.
Aggregate withholding with RSU and bonus?: Pub. 15 allows combining with regular wages for on that check — may increase vs isolated .
Is bonus taxed differently than RSU on same stub?: Both are ordinary wages. method applies to the paycheck total, not different tax categories.
22% on vest plus bonus?: Flat supplemental may apply to combined supplemental amount if employer uses that method — verify on stub.
Same paycheck vs same year bonus and RSU?: Same paycheck affects one period . Same year stacking affects marginal bracket — see bonus same year guide too.
FICA on bonus and RSU together?: Both count toward FICA wages. Social Security stops after wage base reached.
Negative net pay with bonus and vest?: can exceed period salary cash — employer may reduce future checks or you owe balance.
Sell-to-cover plus bonus cash?: may sell shares for tax; bonus is separate cash — both increase gross wages.
Which guides pair with this?: Aggregate , and bonus same year, pay stub after , tech sales role guide.
Calculators?: tax, gap, annual income estimator with bonus in income.

When to get help from a tax pro

Payroll used zero on large combined check.
Bonus gross-up and interaction at your employer.
Multi-state bonus and sourcing.
Commission plus plus bonus triple stack same period.

Related calculators

Sources and notes

Primary tax claims on this page are supported by the official and secondary sources below. Broker and software links describe reporting mechanics — confirm rules against IRS or state guidance.

RSU vest as ordinary wage income on Form W-2 and separate capital-gain treatment on later sale.

IRS — U.S. taxation of stock-based compensation (RSU vesting and W-2 reporting)
Internal Revenue Service · Official
Describes RSU income at vest, W-2 reporting in boxes 1/3/5, and ordinary income treatment.
IRS Publication 525 — Taxable and Nontaxable Income
Internal Revenue Service · Official
Covers compensation income from stock-based pay, including restricted property under section 83.
Equity Compensation — RSU taxation at vest and on sale
Charles Schwab (Workplace Financial Services) · Brokerage explainer
Plain-language explainer: RSU value at vest on W-2, FICA, withholding may not cover full tax, separate capital gains on sale.

For learning, not filing

VestingTax.com is not a CPA firm or tax preparer. Grants, employers, and states all differ. Use the cited IRS and state sources above, your own documents, and a qualified tax professional before you make decisions from this guide.

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RSU vest and bonus on the same paycheck: aggregate withholding explained