Do refresh grants change how RSUs are taxed?

No special tax category. Each refresh vests and is taxed as wages on its own vest dates. The impact is volume: more grants mean more vest events in a year.

Should engineers sell immediately at vest?

Tax at vest is generally the same whether you sell or hold; holding adds market risk. Many engineers sell some shares to cover tax and reduce concentration in employer stock.

What changes if I join at a startup instead of FAANG?

Public RSU mechanics (vest as wages, W-2, 1099-B on sale) still apply once shares vest. Pre-IPO illiquidity and different grant types add other issues this page does not cover.

I'm on an H-1B — anything different?

Residency for tax purposes follows IRS rules, not visa type alone. Wage treatment at vest is similar for most employees, but international filings add complexity beyond this guide.

RSU Tax Guide for Software Engineers | Big Tech Vests

You are a software engineer at a public tech company with initial grant plus refreshers vesting on a predictable schedule. You want to know why flat withholding on each vest can still leave a tax bill when vests stack in one year.

In plain terms

Engineering comp at larger companies often combines salary, bonus, and overlapping grants. Each is wage income, usually withheld at a flat supplemental rate that may be below your when multiple vests land in the same tax year.

Gather before you start

Equity portal export of all active grants and dates this year.
Rough share price for upcoming vests.
Last pay stub showing year-to-date wages.
Filing status and state of residence.

Written for typical U.S. W-2 engineers at public companies. Your plan administrator's rules and state residency control the details.

How the tax works

Initial grants and refreshers create multiple streams that overlap.

Each is taxed as wages when it vests, not when the grant was signed.

Flat supplemental on each does not know about your other vests or spouse's income.

Job changes and remote moves can split wages across states in the same year.

What to check on your end

Total expected income for the calendar year across all grants.
Whether combined salary plus pushes you into a higher bracket.
rate on each vs. your .
State reporting if you changed jobs or work locations.
Concentration risk if you hold vested shares instead of selling.

Evaluating each vest in isolation

A single $15,000 might look fine with flat . Four vests plus a bonus in the same year can land in a higher bracket where each flat-withheld underpaid. The gap shows up once, at filing, even though every individual notice looked reasonable.

What to pull from your files

Grant letters and refresh grant dates in the equity portal.
Quarterly confirmations and breakdowns.
after year-end: total wages vs. salary alone.
if you sold vested shares (basis often $0 without adjustment).
Offer letter or comp statement showing cadence (for planning, not tax proof).

Example scenario (hypothetical)

Illustration only, not your tax situation.

An engineer has an initial four-year grant and two refreshers, producing four vests totaling about $120,000 in one year. Each uses flat supplemental , but combined income sits in a higher bracket. The engineer uses a -gap estimate mid-year and increases W-4 on salary before the largest .

Questions people ask

Do refresh grants change how RSUs are taxed?: No special tax category. Each refresh vests and is taxed as wages on its own dates. The impact is volume: more grants mean more events in a year.
Should engineers sell immediately at vest?: Tax at is generally the same whether you sell or hold; holding adds market risk. Many engineers sell some shares to cover tax and reduce concentration in employer stock.
What changes if I join at a startup instead of FAANG?: Public mechanics ( as wages, , on sale) still apply once shares . Pre-IPO illiquidity and different grant types add other issues this page does not cover.
I'm on an H-1B — anything different?: Residency for tax purposes follows IRS rules, not visa type alone. Wage treatment at is similar for most employees, but international filings add complexity beyond this guide.

When a CPA is worth it

You have several overlapping grants in one year.
You changed employers and have multi-state wages.
You hold a large concentrated position in company stock.
You want a repeatable plan across all vests.

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.

Flat supplemental withholding on multiple vests vs marginal tax when income stacks in one year.

IRS Publication 15 (Circular E) — Supplemental wages
Internal Revenue Service · Official
Section 7 describes supplemental wage withholding, including the optional 22% flat rate and 37% rate above $1 million of supplemental wages in a calendar year.
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.

Related calculators

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 taxes for software engineers