An IPO rumor is not an IPO. Companies delay, downsize, or abandon offerings, and rumored timelines slip often. This post lays out what exercising early costs, what it can save, and what stays the same either way, so you can weigh the tradeoffs against your own situation. It does not recommend a path.
Why does the timing of exercise matter around an IPO?
Because the number your tax is based on changes. Before the IPO, the value of your shares for tax purposes is set by your company’s 409A valuation, an independent appraisal of the company’s common stock. After the IPO, it is the market price, which is often meaningfully higher than the last private valuation. The gap between your strike price and that value, called the spread, is what gets taxed when you exercise.
What does it cost to exercise now?
Two things: the strike price multiplied by the number of shares, and the tax on the spread. For incentive stock options (ISOs), the spread is generally not taxed as regular income at exercise but counts toward the alternative minimum tax (AMT), a parallel tax calculation. For non-qualified stock options (NSOs), the spread is taxed as ordinary income right away. In both cases, the cash is due even though the shares can’t be sold.
What can exercising early potentially save?
A smaller spread, and an earlier start to your holding period. If the IPO prices well above the current 409A valuation, exercising beforehand typically means a smaller taxable spread than exercising afterward. Exercising also starts the clock on long-term capital gains treatment, which generally requires holding shares more than one year from exercise. For ISOs, a favorable “qualifying disposition” also requires holding at least two years from the grant date.
What are the risks of exercising before the IPO happens?
The main one is that you commit cash to shares that may stay illiquid for a long time. If the IPO is delayed, withdrawn, or priced below expectations, you have paid the strike price and possibly AMT on a valuation that may never be realized. AMT paid generally becomes a credit against future regular tax, but it can take years to use. There is also a second layer of timing risk: after an IPO, a lock-up period (commonly 180 days) usually prevents sales, so any tax bill from an exercise has to be funded from other sources.
What is different about waiting until after the IPO?
Two things. First, the spread is measured against the public price, which may be higher or lower than the private valuation. Second, many public companies allow a cashless exercise, where you exercise and sell enough shares at the same time to cover the cost and taxes. That removes the need to fund the exercise from savings, but it generally requires being past any lock-up and trading window restrictions. Some companies also restrict or pause option exercises around an IPO filing, so it is worth asking your equity administrator what applies at your company.
Does QSBS apply here?
Usually not for a company far enough along to be rumored for an IPO. Qualified Small Business Stock (QSBS) treatment under Section 1202 requires the company to have had aggregate gross assets of $75 million or less when the stock was issued (for stock issued after July 4, 2025; $50 million before). Late-stage private companies typically exceed that. This is a company-level fact, so confirm it with a tax professional rather than assuming either way.
Worked example
Say you hold 8,000 vested ISOs with a $4 strike price. The current 409A valuation is $20 a share, and the rumored IPO price is $35.
Exercise cost either way: 8,000 × $4 = $32,000
AMT spread exercising now: 8,000 × ($20 − $4) = $128,000
AMT spread exercising after the IPO at $35: 8,000 × ($35 − $4) = $248,000
For a single filer with no other AMT income, using the 2026 exemption of $90,100 and an approximate 26% rate, that is roughly $9,900 of AMT owed exercising now versus roughly $41,000 exercising after the IPO (28% applies to part of larger amounts, so these are approximations). Exercising now therefore means about $41,900 of cash out ($32,000 plus about $9,900) against shares you cannot sell. If the IPO never happens, that cash is tied up with no near-term exit. If it does happen at or above $35, the earlier exercise avoided roughly $31,000 of additional AMT. This is a simplified estimate; your actual numbers depend on your full income and filing status.
FAQ
Does a rumored IPO change my exercise deadline? No. Your exercise rights, expiration date, and any post-termination window are set by your option agreement and are unaffected by rumors.
If I exercise now, can I sell at the IPO? Generally no. A lock-up period, commonly 180 days, usually restricts insiders from selling after the IPO. Many option agreements also include a market stand-off clause with similar restrictions.
What if the IPO price ends up below the 409A valuation? Then the spread you paid tax on at exercise may be larger than the value you can realize. For ISOs, AMT paid is generally recoverable as a future credit, though not quickly.
Is there a deadline to decide? Only the ones in your own grant, such as an expiration date or a post-termination exercise window. A rumor does not create a deadline, though some companies restrict exercises once an IPO process begins.
Can I exercise only some of my options? Usually yes. Partial exercise is common and caps both the cash outlay and the tax exposure.
What to do next
Your actual strike price, the current 409A valuation, and your company’s policies around IPO timing are in your grant documents and with your equity administrator. You can model your own numbers at movewealth.io.
MoveWealth is not a broker-dealer, investment adviser, or lender. This is educational content, not financial, tax, or legal advice. Consult a qualified professional about your specific situation.