Late-Stage Equity: AMT Exposure, Secondary Markets, and Pre-IPO Planning

As your company's valuation climbs toward IPO, the gap between your strike price and current value expands—triggering bigger AMT obligations if you exercise ISOs. Learn about secondary market opportunities, the pre-IPO planning window before shares become liquid, and how to structure exercises across multiple years.

The AMT problem scales up. As the 409A valuation rises with each funding round, the spread between your ISO strike price and the current fair market value grows. Exercising ISOs at this stage can generate a substantial AMT preference item. If your strike price is $2 and the 409A value is now $40, exercising 10,000 shares creates a $380,000 AMT preference item. That can easily trigger a six-figure AMT bill on income you haven't actually received as cash.

Secondary market opportunities. Some late-stage private companies allow employees to sell shares on secondary markets or through company-sponsored tender offers. These sales create taxable events. The tax treatment depends on your grant type, how long you've held the shares, and the terms of the sale. A CPA can help you decide whether selling some shares now at a lower price but with tax certainty is better than waiting for a liquidity event at an uncertain future price.

Pre-IPO planning window. The period before an IPO is your last chance to exercise options at the current 409A value. Once the company is public, the fair market value is the market price, which is typically much higher than the last private 409A valuation. Many employees strategically exercise in tranches during this window to spread the tax impact across multiple years.

The tradeoff: Late-stage means higher confidence in a liquidity event but also higher tax stakes. The planning decisions you make in the 12 to 24 months before an IPO or acquisition often determine more of your after-tax outcome than the event itself.