RSU vs Stock Options: The Guide I Needed Before My First Tech Offer
My first offer letter said "50,000 stock options." I had no idea what that meant. Was I rich? Could I retire? Turns out, those options ended up being worth exactly $0 when the startup died. My second offer had RSUs instead. Very different outcome.
If you're confused about RSUs vs stock options, you're not alone. Here's everything I wish someone had explained to me.
The One-Sentence Difference
Stock Options
The right to buy company stock at a set price in the future. You have to pay to exercise them.
RSUs (Restricted Stock Units)
A promise to give you actual stock shares once they vest. No purchase required.
Stock Options Explained (Like You're 5)
Let's say a company gives you 10,000 stock options with a "strike price" of $1 per share.
How Stock Options Work
- 1. You get options - The company says "you can buy 10,000 shares at $1 each, anytime after they vest."
- 2. They vest over time - Usually 4 years with a 1-year cliff (25% after year 1, then monthly).
- 3. The stock price changes - Maybe it goes to $10 per share.
- 4. You exercise (buy) - You pay $1 x 10,000 = $10,000 to buy the shares.
- 5. You sell (hopefully) - If the stock is at $10, your shares are worth $100,000. Profit: $90,000.
The Upside
If the stock price goes way up (10x, 100x), your options can be worth a fortune. Early employees at companies like Google and Meta became millionaires this way.
The Downside
If the stock price stays flat or goes down below your strike price, your options are "underwater" - literally worthless. This happens more often than the success stories.
RSUs Explained (Also Like You're 5)
RSUs are simpler. The company says "we'll give you actual shares over time."
How RSUs Work
- 1. You get a grant - The company says "you'll receive 1,000 shares over 4 years."
- 2. They vest over time - Usually quarterly or annually after a cliff.
- 3. You get actual shares - When they vest, shares land in your brokerage account.
- 4. You can sell immediately - Or hold. Your choice.
The Upside
RSUs always have value (unless the company goes to $0). Even if the stock drops 50%, your RSUs are still worth something.
The Downside
Less upside than options. If the stock goes 10x, you make 10x. With options at a low strike price, you could make 100x. RSUs are the "safer" play.
Side-by-Side Comparison
| Factor | Stock Options | RSUs |
|---|---|---|
| You pay to own | Yes (strike price) | No |
| Value if stock drops | Could be $0 | Still worth something |
| Upside potential | Higher | Lower |
| Risk | Higher | Lower |
| When taxed | Exercise + Sale | Vesting + Sale |
| Common at | Startups | Public companies |
| Complexity | Higher | Lower |
The Tax Situation (Important!)
I'm Not a Tax Advisor
This is general information. Talk to a CPA or tax professional before making decisions about exercising options or selling RSUs.
RSU Taxes
RSUs are taxed as ordinary income when they vest. If you receive $50,000 in RSUs that vest, that's $50,000 added to your income for the year.
- • Federal tax: Up to 37% depending on your bracket
- • State tax: Varies by state (0-13%+)
- • Social Security + Medicare: 7.65%
- • Companies typically withhold shares to cover taxes automatically
Stock Option Taxes (More Complicated)
There are two types of stock options with different tax treatments:
ISOs (Incentive Stock Options)
- • No tax when you exercise (mostly)
- • Capital gains tax when you sell (if you hold long enough)
- • Can trigger AMT (Alternative Minimum Tax) - talk to an accountant
NSOs (Non-Qualified Stock Options)
- • Taxed as ordinary income when you exercise (on the gain)
- • Additional capital gains tax when you sell (if the price went up more)
When Companies Use Each
Startups Use Stock Options
Early-stage companies have low stock valuations. Options with a $0.10 strike price can be worth a fortune if the company succeeds. It's a bet on growth.
Public Companies Use RSUs
Google, Meta, Amazon, Microsoft all use RSUs. The stock price is already high, so options wouldn't be as attractive. RSUs provide predictable value.
Late-Stage Startups: Often Both or Transitioning
Companies typically switch from options to RSUs around $1B valuation or when approaching IPO. On average, this happens about 5.5 years after incorporation.
Double-Trigger Vesting (Private Company RSUs)
If you get RSUs at a private company, watch out for "double-trigger vesting":
What Double-Trigger Means
Two things must happen before you actually own your shares:
- 1. Time vesting - You've worked long enough (usually 4 years)
- 2. Liquidity event - The company IPOs or gets acquired
Without both triggers, you own nothing. I've seen people leave startups with "vested" RSUs worth $0 because the company never went public.
Which Should You Prefer?
Prefer RSUs if...
- • You want predictable compensation
- • You're risk-averse
- • The company is already public or near-IPO
- • You don't have cash to exercise options
Options might be better if...
- • It's an early-stage startup with huge growth potential
- • The strike price is very low
- • You can afford the risk of them being worthless
- • You believe strongly in the company
Questions to Ask About Your Offer
- • What type of equity? RSUs, ISOs, or NSOs?
- • What's the vesting schedule? 4-year with 1-year cliff is standard.
- • For options: What's the strike price? And what's the current 409A valuation?
- • For RSUs: Single or double trigger? This matters for private companies.
- • What's the exercise window if you leave? 90 days is common but rough.
- • How many total shares outstanding? This tells you your % ownership.
My Personal Take
After getting burned by worthless options at a startup, I personally prefer RSUs now. The predictability is worth more to me than the lottery-ticket upside of options.
That said, if I joined a Series A startup I really believed in with a low strike price? I'd probably take the options and the risk.
Know what you're getting, understand the risks, and make the choice that fits your financial situation and risk tolerance.
Last updated: January 2026. This is not financial or tax advice.