The window to act is before the S-1 is filed. Capital Tax specializes in equity compensation tax strategy for employees at pre-IPO companies — protecting your ISOs, NSOs, RSUs, and QSBS eligibility before the liquidity event arrives.
xA
Space
Stripe
Databricks
Klarna
Cerebras
+ more
of IPO gains lost to tax without a plan
Free 30-min Pre-IPO Tax Strategy Session · No obligation
✦ 25+ Years of Experience ✦ Licensed CPAs ✦ Palo Alto · Walnut Creek · Santa Monica ✦ Year-Round Consultation ✦ 100% U.S.-Based Team
Tax planning is not a single action — it is multiple coordinated strategies over time
that produce extraordinary results. Pre-IPO equity requires this methodology more
than almost any other financial situation.
Executives and employees at pre-IPO companies receive complex compensation: ISOs, NSOs, RSUs, early-exercised options, and possibly founder shares with QSBS eligibility. Each component has different tax treatment. We consolidate everything into a single equity schedule before any recommendations are made.
Incentive Stock Options can trigger Alternative Minimum Tax on paper gains before you receive a dollar of cash. We calculate your AMT crossover point — the maximum ISOs you can exercise annually without owing additional tax — and build an exercise schedule around it. This single strategy has saved our clients hundreds of thousands of dollars.
Section 1202 Qualified Small Business Stock can exclude up to $10M of gains from federal tax entirely. The 5-year holding clock, company eligibility requirements, and restructuring risks must all be actively managed. We verify eligibility and monitor every condition so your exclusion remains intact through the IPO.
Remote work has created significant multi-state tax exposure for pre-IPO employees. If you vested options while living in Texas but working for a California-headquartered company, California may still assert taxation rights. A proper apportionment analysis — conducted before the IPO — can legally shift taxable income out of high-tax jurisdictions.
Maximum federal capital gains exclusion available
under Section 1202 QSBS — 100% tax-free if
eligibility requirements are met.
Most employees don’t know if they qualify
The IRS deadline to file an 83(b) election after early
exercise. Missed by the majority of employees who
exercise early — and not correctable after the fact.
No exceptions, no extensions
Typical IPO lock-up period. You may owe significant
AMT on paper gains while legally barred from
selling shares to pay the tax bill.
Requires advance cash flow planning
Combined federal and state tax rate that can apply
to IPO gains for California residents without
proactive planning. The difference between
optimized and unplanned outcomes is often seven
figures.
Preventable with the right strategy
Each of these is preventable with proper planning — and each is routinely
discovered too late by employees who waited until the IPO announcement to
consult a tax advisor.
When you exercise ISOs, the spread between your strike price and fair market value triggers Alternative Minimum Tax on income you haven’t actually received. With a $0.01 strike and $50 FMV on 100,000 shares, your AMT exposure is over $1M — due by April 15, even if you are locked out of selling a single share during the 180-day post-IPO lockup.
Exposure: $500K–$2M+
Missed federal exclusion: up to $10M–$15M in gains
California, New York, and Massachusetts all assert ‘source income’ taxation rights over equity compensation earned while working in those states — even if you’ve since moved. Remote employees are especially vulnerable. Without a proper apportionment analysis, employees commonly overpay state taxes by $100K–$400K on a single liquidity event.
Surprise liability: $100K–$400K
We move with urgency because IPO timelines don’t wait. Most clients have a complete written plan within two weeks of their first meeting.
We map every grant — ISOs, NSOs, RSUs, early exercises, and founder shares — into a single verified schedule with strike prices, vesting dates, 83(b) status, and QSBS eligibility.
We handle implementation — filing elections, coordinating with your equity platform, setting up estimated tax payments, and adjusting the plan as your IPO timeline evolves.
The optimal window is when the spread between strike price and 409A FMV is smallest — minimizing the Form 6251 AMT adjustment. Per IRS Form 6251 (2025), the AMT adjustment equals (FMV at exercise − strike price) × shares exercised. Exercising and selling in the same calendar year (disqualifying disposition) avoids AMT but forfeits long-term capital gains treatment. We model multiple exercise scenarios using your actual figures before recommending a timeline.
The 83(b) deadline is 30 days from early exercise — the IRS provides no exceptions. Without it, ordinary income tax applies to the spread as each vesting tranche is released. A missed election is not always catastrophic: depending on current FMV, remaining vesting schedule, and IPO timeline, mitigation strategies may include gift transfers, charitable contributions of appreciated shares, or restructuring future grant negotiations.
If you exercise ISOs in the year of or before the IPO, the bargain element is taxed at 26%–28% AMT — due April 15 of the following year, regardless of the 180-day lock-up. If the stock price falls during the lock-up, you can owe more in AMT than your shares are currently worth. The solution: calculate your AMT crossover point, exercise only up to that threshold annually, and maintain sufficient liquid assets independent of your equity to fund a potential AMT bill.
Yes, partially. California sources equity compensation based on (California workdays ÷ total workdays, grant-to-vest) × total income recognized. If you moved to Texas after 2 years of a 4-year vest, California asserts a sourcing claim on approximately 50% of that income. ISOs use grant-to-exercise; NSOs and RSUs use grant-to-vest (FTB Publication 1005, R&TC §17951). California’s nonconformity with §1202 means any CA-sourced QSBS gains are also fully taxable at state rates up to 13.3%.
The most valuable window is 12–24 months before the anticipated IPO — when QSBS clocks can still be managed, ISO exercises remain fully open, 83(b) elections can still be filed on new grants, and estate structures like GRATs can be funded at pre-IPO valuations. Once the S-1 is filed, 409A valuations spike and most high-value moves close. For post-OBBBA stock (issued after July 4, 2025), the new 3-year and 4-year partial exclusion thresholds create additional planning flexibility.
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