TL;DR:
- On the Section 102 trustee capital-gains track, exercise is not a tax event — sale is.
- Under Section 3(i), exercise is the tax event, so timing directly creates the bill.
- The 24-month clock runs from grant, so exercising early does not start it sooner.
- Leaving the company usually starts a 90-day window on vested options; unvested options are forfeited.
- The real risk at a private company is dry income — tax owed on shares you cannot sell.
Step One: Establish Which Regime You Are In
Every exercise question has a different answer depending on the regime. On the trustee capital-gains track, exercising converts your option into a share held by the trustee and nothing is taxed until sale. Under Section 3(i), exercising crystallises ordinary income equal to the fair market value less the strike price, payable that year whether or not you can sell. If you have not confirmed your regime, start with the comparison guide.
The 24-Month Clock in Practice
The capital-gains track requires the award to be held by the trustee for at least 24 months. The clock runs from the grant deposit, not from vesting and not from exercise. Three consequences follow:
- Exercising earlier does not shorten the wait. There is no tax reason to exercise sooner to "start the clock".
- An employee with a one-year cliff who sells at month 13 is inside the window and loses the 25% rate on the whole award.
- The clock keeps running after you leave the company, so a departing employee who exercises within the 90-day window can still reach the 24-month mark and qualify.
A breach is not partial. The whole disposal is recharacterised as ordinary income, with National Insurance, and the employer becomes responsible for withholding. Well-run trustee platforms block early sale requests automatically; do not rely on that.
Exercise Methods and When Each Fits
| Method | How it works | Available at | Main drawback |
|---|---|---|---|
| Cash exercise | You pay the strike price in cash and receive shares | Private and public | Capital at risk in an illiquid asset |
| Net exercise | Shares are withheld to cover the strike price | Only if the plan permits | Fewer shares; may complicate 102 mechanics |
| Cashless sell-to-cover | Broker sells enough shares to cover strike and tax | Public, or at closing of an exit | Unavailable while private |
| Same-day sale | Full exercise and immediate sale | Public, post-24 months | No further capital appreciation |
The Dry Income Trap
Dry income is tax owed on value you cannot convert to cash. It arises under Section 3(i) at exercise, and under Section 102 if the trustee releases shares to you before sale. The classic sequence: an employee exercises at a high 409A-equivalent valuation, the round that was supposed to close does not, the company later sells for a fraction of that value — and the tax was already paid on the higher figure.
Mitigations that actually work:
- Do not exercise 3(i) options at a private company without a visible, funded liquidity path.
- Where an exercise is unavoidable, exercise as soon after a low valuation as possible rather than after a markup.
- Split exercises across tax years to use lower brackets, where the position is small enough for that to matter.
- Where the amounts are significant, consider a pre-ruling before acting — see the pre-ruling timeline.
Leaving the Company
Standard Israeli plan mechanics on termination:
- Unvested options are forfeited on the termination date, subject to any acceleration in your agreement.
- Vested options must usually be exercised within 90 days, sometimes 12 months on death or disability.
- Shares already held by the trustee stay with the trustee until sale, and remain on the capital-gains track if the 24-month period is met.
- Termination for cause commonly forfeits everything, vested included. Read that clause before you resign.
The interaction with relocation is a separate problem entirely, covered in leaving Israel with Section 102 equity.
A Decision Framework
- Confirm the regime — 102 capital, 102 ordinary, or 3(i).
- Find the expiry date and the post-termination window. Expiry is the only true deadline.
- Compute the cash cost — strike price plus any tax at exercise.
- Assess liquidity — is there a tender, a secondary programme, or a credible exit within 24 months?
- Check the 24-month mark and never sell before it on the capital track.
- Model the after-tax outcome at a pessimistic valuation, not the one in the board deck.
Mistakes We See Repeatedly
- Selling at month 20 for a house deposit and paying double the tax on the entire position.
- Exercising a large 3(i) option grant at a peak private valuation with no way to sell.
- Letting vested options lapse 90 days after leaving because nobody read the plan.
- Assuming the trustee handles reporting for a foreign brokerage account it never sees.
- Ignoring the exchange rate on the exercise date and misreporting the shekel basis.
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