The 83(b) Election Deadline: No Second Chances for Startup Equity
About this Capsule
When employees receive startup equity, they must file a special tax election within 30 days or risk losing critical tax benefits permanently. Unlike common beliefs, there is no reliable way to file late or get an extension, so proof of timely filing is essential. This strict deadline means employees must act quickly and use official IRS channels with verified identity to protect their financial interests.
Generic AI vs This Capsule
Preview“What is the most important thing to know about startup equity taxes?”
Generic AI
“The most important thing to know is:
Startup equity can create a tax bill before you have cash to pay it.
That means you should understand the tax consequences before you exercise options, receive restricted stock, or sell shares.
Key points:
- If you receive restricted stock or early-exercise options, you may need to file an 83(b) election within 30 days. Missing that deadline can be very expensive.
- Exercising stock options can trigger taxes, even if you cannot sell the shares yet.
- ISOs may trigger AMT — Alternative Minimum Tax.
- NSOs generally create ordinary income when exercised.
- Your tax outcome depends heavily on:
- the type of equity: ISO, NSO, RSU, restricted stock
- strike price vs. fair market value
- when you exercise
- when you sell
- whether the company succeeds, fails, or stays private
- Holding shares long enough may qua...”
This Capsule
“The most important thing: the 83(b) election deadline is a trapdoor, not a deadline you can clean up later. If you receive restricted stock or early-exercise unvested options, you generally have 30 calendar days from the property transfer/exercise date to file. Miss it by even one day and the election is gone—no extension, no hardship relief, no “my CPA was reviewing it,” no reliable fix.
What to do:
-
Identify the real transfer date.
The clock starts when the restricted stock/property is transferred—often the grant/purchase/exercise date, not when you receive paperwork or talk to a tax advisor. -
File the 83(b) election within 30 calendar days.
For early-exercised options, the 30-day window runs from the exercise/stock transfer date. For restricted stock grants, it runs from the grant/transfer date. -
Use Form 15620 or a compliant written election. ...”
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