Key Takeaways:
- With ISOs, you have a huge opportunity to save on taxes. If your ISOs qualify for the lower long-term capital gains tax rate, you can save up to 17% in taxes on your Anthropic gains.
- With NSOs, exercising is the taxable moment. The spread between your exercise price and the share price is taxed as ordinary income when you exercise, but you also need to understand how much time value is left in your NSOs.
- With RSUs, growth after settlement gets the tax break. The value when they settle is ordinary income; hold the shares more than a year afterward and the appreciation can qualify for long-term capital gains.
Your Anthropic equity could turn into a big piece of your net worth, and how much of it you keep after taxes depends a lot on decisions you make before you exercise, settle, or sell. Incentive stock options (ISOs), non-qualified stock options (NSOs), and restricted stock units (RSUs) are all valuable, but each one hits your tax return at a different moment and in a different way.
The first thing I do with Anthropic employees is pin down exactly what kind of equity they’re holding, because ISOs, NSOs, and RSUs are each taxed differently. How much to keep and how (and when) to sell it down is its own conversation. Please note that these strategies to minimize your taxes assume you can sell your Anthropic stock in the stock market after the company has had its IPO.
How to Minimize Taxes on Your Anthropic ISOs
Incentive stock options, or ISOs, aren’t stock. They’re the right to buy stock later at a price that’s locked in now, called your exercise price. To “exercise” your ISOs is to actually use that right: you pay the exercise price and turn your options into Anthropic shares you own.
Say you have 2,500 ISOs at a $1 exercise price, and the shares are now worth $100 each. You exercise by paying 2,500 × $1, so $2,500 out of pocket, and you get 2,500 shares now worth $250,000. That $247,500 gap between what you paid and what they’re worth is the “spread,” and it’s the number that drives everything on the tax side.
Here’s what makes ISOs special: when you exercise them, you pay $0 in ordinary income tax. That sets them apart from NSOs and RSUs, which is why ISOs are often called the most valuable form of employee equity. The tradeoff is a second tax that can show up instead, so let’s start there.
What Is the Alternative Minimum Tax (AMT)?
AMT is basically a second way of figuring your taxes. Each year, you (or your tax professional) run the numbers twice, once the regular way and once the AMT way, and you pay whichever comes out higher. Most years the regular calculation wins, and you never think about AMT.
Exercising and holding ISOs can flip that. When you exercise, there’s a “spread,” or a difference between what you paid to exercise and what the shares are worth that day. Regular tax ignores that spread. AMT doesn’t; it treats the spread as income. So if you exercise a large number of ISOs and hold the shares, that spread can make your AMT number higher, and you’d owe the difference.2
A few things to keep straight:
- You only owe AMT if you hold into the next year: Exercise ISOs in one calendar year and still own the shares when it ends, and the spread hits your AMT. Exercise and sell in the same year, and there’s no AMT, though you’ll pay regular income tax on that gain instead.
- Bigger exercises mean bigger AMT: The more ISOs you exercise and hold in one year, the larger the spread, and the more likely AMT applies. That’s why it pays to run the numbers before you exercise, rather than finding out at filing time.
- AMT isn’t money down the drain: If you do pay it, you get an AMT credit you can use in later years when your regular tax runs higher than your AMT. That credit lasts your lifetime until it’s used up.3
The Key Tax Benefit of Your ISOs
The reason you’d put up with the AMT is the payoff waiting on the other side. Hold your exercised Anthropic ISO shares long enough, and your gain is taxed at the lower long-term capital gains rate rather than the ordinary income rate.
“Long enough” means clearing two clocks, and you have to clear both:
- More than one year after you exercise the ISOs.
- More than two years after your original grant date.4
Clear both, and here’s what it’s worth: the top federal ordinary income rate is 37%,5 while the top federal long-term capital gains rate is 20%.6 That’s up to 17% of your gain saved. On $1,000,000 of qualifying gain, you’d keep an extra $170,000. That’s saving real money on your Anthropic ISOs!
How to Minimize Taxes on Your Anthropic NSOs
Non-qualified stock options, or NSOs, can look identical to ISOs in your account, so double-check which you have, because they’re taxed differently. If you hold Anthropic NSOs, you owe nothing when they are granted or vested. The tax shows up when you exercise: the spread between your exercise price and the share’s market value gets taxed as ordinary income, just like salary.7
Say you got 10,000 NSOs at a $1 exercise price, vesting over four years. After year one, 2,500 have vested, and the shares are now worth $100 each. Exercise those 2,500, and you pay $2,500 to get stock worth $250,000. You owe ordinary income tax on the intrinsic value, the $247,500 difference:
$250,000 fair market value – $2,500 exercise price = $247,500 intrinsic value
That $247,500 gets taxed like a $247,500 salary bonus that year, big enough to push part of your income into a higher bracket. That’s why you usually want to do some tax planning before you exercise.
What Is the Time Value of Your Anthropic NSOs, and Why Does It Matter?
An NSO is worth more than just what you’d pocket today. Its value comes from two parts:
- Intrinsic value: What you’d make if you exercised right now, the $247,500 difference above. Easy to see.
- Time value: The extra value that comes from the option still having years to run before it expires, usually ranging from 7 to 10 years, as long as you’re still at the company. The more time left, the more room the stock has to grow, and once it expires, it’s worthless.
Think of it this way: an NSO expiring ten years from now is worth more than the same one expiring tomorrow, because the stock has a decade to climb instead of a day. That extra runway is the time value. In our example, the options were granted a year ago, so with a 10-year life they’ve still got nine years left, and plenty of time value they’ll slowly give up as expiration gets closer.
When Should You Exercise Your Anthropic NSOs?
Now put the two together. You owe ordinary income tax the moment you exercise, which argues for selling right away, since you’re paying that tax either way. But the option holds more time value the further you are from expiration, which argues for waiting. My rule of thumb balances both.
One approach I use with clients is to schedule the exercise and sale for when the NSOs are within about a year or two of expiring:
- Exercise too early, and you leave too much time value on the table.
- Wait too long, and you risk being forced to sell low, or letting the options expire worthless.
- Hit that one-to-two-year window, and you capture most of the time value while keeping flexibility on when to sell.
Where exactly you land depends on your own tax situation, so it’s worth walking through with your tax professional or financial planner.
How to Minimize Taxes on Your Anthropic RSUs
Restricted stock units, or RSUs, are the simplest of the three. They’re just company stock granted to you, with no exercise price and nothing to buy. At Anthropic, they’re typically double-trigger, which means two separate things have to happen before they’re fully yours:
- Trigger one, time: You vest them on a schedule as you work, maybe 25% after your first year, then the rest quarterly over four years.
- Trigger two, a liquidity event: Usually an initial public offering (IPO). When it happens, everything you’ve vested on the time-based schedule settles at once.
That second trigger is also your tax moment. When your RSUs settle, their full value counts as ordinary income for that tax year.8 Because an IPO can settle several years’ worth of grants all at once, that can be a big number, so it’s worth checking whether your withholding will actually cover the bill.
Here’s one way to minimize taxes with your Anthropic RSUs that you have. If you hold the shares for more than a year after they settle, the growth from that point on qualifies for the lower long-term capital gains rate, that same 37%-versus-20% gap. Say a share settles at $100, you hold it more than a year, then sell at $190. You’d pay long-term capital gains on just the $90 of growth. Again, this assumes that Anthropic stock is publicly traded.
The original $100 stays ordinary income no matter what; holding only helps the appreciation after settlement. And, since an IPO can hand you years of stock at once, weigh your concentration risk and diversification alongside the tax savings. Ensure you don’t let a big position ride just to chase the tax break.
Anthropic ISOs, NSOs, and RSUs Tax Planning FAQs
1. How are Anthropic ISOs, NSOs, and RSUs taxed differently?
ISOs create no regular income tax when you exercise and can qualify for the lower long term capital gains tax rate, though holding the shares can trigger AMT. NSOs create ordinary income when you exercise. RSUs create ordinary income when they settle.
2. When can exercising Anthropic ISOs trigger the AMT?
When you exercise in one calendar year and hold the shares into the next. The spread goes into your AMT calculation, so it’s worth projecting the number before you exercise a big batch.
More than one year after you exercise and more than two years after your grant date. You have to clear both.
4. How is the intrinsic value of my NSOs taxed when I exercise?
The spread between the market value and your exercise price is ordinary income that year, taxed the same way your salary is.
5. Why would I wait until my NSOs are within a year or two of expiring to exercise?
Waiting keeps the time value working for you through most of the option’s life. Exercising in that final window still gives you more flexibility than holding on until it’s about to expire.
It can, on the growth after settlement. The value that was taxed when the RSUs settled stays ordinary income; only the later appreciation can get long-term treatment.
How I Help Anthropic Employees Make Tax-Smart Equity Decisions
Your Anthropic equity affects your cash, your investments, and how close you are to making work optional. You need to know what’s taxable, when the bill comes, and whether holding the stock still makes sense for your life outside Anthropic.
I can help you review your grants, compare the options, and tie each one back to your goals, building a practical plan to minimize your taxes on your Anthropic equity and to use the proceeds to achieve your financial goals. If you want help thinking through your own equity, let’s chat.
Resources:
1) IRS Topic No. 427: Stock Options
2) IRS Instructions for Form 6251
3) IRS Topic No. 556: Alternative Minimum Tax
4) IRS: Stocks and Options FAQs
5) IRS: Federal Income Tax Rates and Brackets
6) IRS Topic No. 409: Capital Gains and Losses
7) IRS Publication 525: Taxable and Nontaxable Income
8) IRS Publication 5992: Equity-Based Compensation Audit Guide
After almost 20 years working in tech for companies including eBay, Yahoo!, Intuit, and startups, I made a career change into the financial world as a fee-only financial planner more than a decade ago. I earned my CFP®, spent a few years at a boutique fee-only firm in San Jose, worked 2 1/2 years at a leading wealth management firm in San Francisco, and then left to build the firm I wish had existed when I was working as a tech professional.
My mission is to help other Silicon Valley tech professionals make the most of their stock options and RSUs to help them reach their financial goals.
