RSA vs RSU: Incentive type comparison

Restricted stock awards (RSAs) and restricted stock units (RSUs) look similar on paper. With both, you get company stock that you earn over time, and both are common ways employers share ownership.

But a few details set them apart, and those details are important for when you become a shareholder, whether you can lower your tax bill, and what you get if you leave the company early.

If you're trying to figure out which type of incentive you have and what it means, this guide compares the two side by side. Here's everything you need to know about RSA vs RSU.

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What are RSAs?

A restricted stock award¹ is a grant of company shares that become yours on the grant date and not at some future point.

The catch is in the name: the shares are restricted, meaning they vest over time, and if you leave before they vest, the company can take back the unvested portion.

Because you hold stock from the start, you're often a shareholder right away, with the rights that come with it. RSAs are mostly popular at very early-stage startups, where the share price is low enough that owning stock upfront makes sense.

What are RSUs?

A restricted stock unit² is a promise to give you shares later, once you've met the vesting conditions in your grant. You don't own anything at the start, and no shares change hands until they vest.

There's no purchase involved and no price to pay, so the shares simply arrive in your account when the time comes. RSUs are the norm at larger and public companies, where they're straightforward to manage and hold value as long as the stock does.

You're taxed on that value the year the shares vest.

RSA vs RSU: What are the differences between them?

Both RSAs and RSUs are forms of restricted stock, so there are quite a few similarities. But they're different when it comes to tax and timing.

An RSA gives you the shares upfront, and they vest over time while you already hold them. An RSU does the opposite, holding the shares back and handing them over only once they vest.

When you own the shares

With an RSA, your ownership starts on day one. The shares are issued to you at grant and held subject to vesting, so you're a stockholder from the outset even though you can't do much with the unvested portion yet.

An RSU holds ownership back. The shares don't exist in your name until they vest, and until that happens, what you have is a claim on future stock and not the stock itself.

Voting rights and dividends

Owning shares early comes with perks. RSA holders can usually vote their shares and collect dividends from the grant date, since they're already stockholders.

RSUs don't extend those rights. With no shares issued yet, there's nothing to vote and no dividends to receive until the units vest and convert into actual stock.

Whether there's a purchase price

An RSA can come with a cost to acquire the shares, whether at fair market value, a discount, or nothing at all, depending on how your company structures the grant.

RSUs don't work like that. You never buy them, so the only money you have to pay is the tax you owe once they vest.

The 83(b) election

Because RSA holders receive their shares at grant, they can file an 83(b) election, a choice to be taxed on the value of the stock now instead of at vesting. At an early startup where the shares are worth little, that can mean a tiny tax bill today and capital gains treatment on everything after.

RSU holders don't get this option, since they own no shares at grant to make the election on.

If you leave before vesting

If you walk out with unvested RSAs, the company can buy back or reclaim those shares, so the unvested part doesn't stay with you. In turn, unvested RSUs simply go away because you never held the underlying shares to begin with.

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RSA vs RSU: Tax treatment in the US

For both RSAs and RSUs, the value of your shares is taxed as ordinary income, which is the same category as your salary.

However, there are important differences, too. Here's what they are.

How RSUs are taxed

RSUs are taxed at vesting. When the shares vest, their full market value that day is added to your income for the year, and there's no way to move that date.

Any rise in value after vesting is a capital gain when you sell, taxed at the lower long-term rate once you've held the shares for more than a year past vesting.²

How RSAs are taxed

RSAs have two possible paths, and the fork is the 83(b) election.

If you do nothing, an RSA is taxed much like an RSU. The shares are taxed as ordinary income at vesting, based on their value on each vesting date.

If you file an 83(b) election within 30 days of your grant date, you choose to be taxed on the shares' value at grant instead. At an early-stage startup, where that grant-date value is often close to zero, this can shrink your income tax to very little.¹

From there, any growth is treated as a capital gain when you sell, rather than ordinary income at vesting.

The 30-day window is strict, and there's no way to file late, so this is a decision to make quickly after a grant, ideally with a tax advisor. The election can backfire, too. If you pay tax upfront and then leave before the shares vest, you don't get that tax back.

FAQs

Is an RSA the same as restricted stock?

More or less, yes.

"Restricted stock" is the umbrella term, and a restricted stock award (RSA) is the common form of it, with actual shares granted to you upfront, subject to vesting. People often use the two phrases to mean the same thing.

Do I own the shares as soon as I get an RSA?

Yes, with a condition attached.

The shares are issued to you at grant, so you become a shareholder right away, but they're still subject to vesting. If you leave before they vest, the company can reclaim the unvested portion. So you own them, but you can't count the unvested part as fully yours until you've earned it.

Should I file an 83(b) election?

It depends. Filing tends to make the most sense when the grant-date value is low, such as at an early startup, since you pay a small amount of tax now and treat future growth as capital gains.

The risk is that if the shares lose value or you leave before vesting, you won't recover the tax you paid upfront. The election must be filed within 30 days of your grant, so there's little time to make that choice.¹

Are RSAs or RSUs better?

Neither is better.

RSAs can offer a tax advantage through the 83(b) election and give you ownership rights sooner, which works for early-stage companies. RSUs are simpler, require no upfront cost or election, and always hold value as long as the stock does, which is why larger companies favor them.

The better fit depends on your company's stage and your own finances, and in most cases the company decides which one you get.

Why do startups use RSAs instead of RSUs?

Early-stage startups often use RSAs because the share price is still very low. At that stage, granting shares lets founders and early employees file an 83(b) election, lock in a tiny tax bill, and start the capital gains clock early.

As a company grows and its shares gain value, that upfront approach stops working well, so most later-stage and public companies switch to RSUs.

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RSAs and RSUs are two takes on the same idea: company stock you earn over time.

However, there are important differences. An RSA puts the shares in your hands at grant, brings ownership rights sooner, and opens the door to an 83(b) election. An RSU holds the shares until vesting.

Make sure to read your grant paperwork and speak with a tax advisor, especially about the 83(b) deadline.

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Sources

1. Carta - Restricted stock awards (RSA)
2. Carta - Restricted stock units (RSU)

Sources checked 09/17/2026