What Is an 83(b) Election and Why Does Timing Matter So Much?

Sam's List Editorial | 2026-07-20

What Is an 83(b) Election and Why Does Timing Matter So Much? The short answer: an 83(b) election is a form you file with the IRS to be taxed on restricted equity now, at its low early value, instead of later as it vests at a potentially much higher value. For a founder holding cheap early shares, that choice can be the difference between a tiny tax bill today and a large one over the next few years. The catch is a hard deadline that does not bend. Here is how it works and why the timing is the whole game. What the Election Actually Does When you receive equity subject to vesting, such as restricted stock or early-exercised options, the default tax rule is unfriendly. As the shares vest, you are taxed on the difference between what you paid and what they are worth at each vesting date. If the company's value climbs, you owe ordinary income tax on that growing spread, year after year, on stock you cannot necessarily sell. An 83(b) election flips the timing. You elect to be taxed at grant instead, on the spread between your purchase price and the value then. For founders whose shares are worth almost nothing at incorporation, that spread is often near zero, so the tax at election can be very small or none at all. Why Founders and Early Employees Care The benefit is twofold when the company succeeds. You potentially pay little or no tax up front, and you start your capital gains holding-period clock at grant, so future appreciation can be taxed as long-term capital gain rather than ordinary income as it vests. Put simply, an 83(b) can convert what would have been years of ordinary-income tax on vesting into a single small event now, plus capital gains treatment later. For early-stage equity that could grow significantly, the difference can be substantial. None of that is reliable, though, and the downside is real, which is why it is a decision and not a reflex. The 30-Day Deadline This is the part that catches people. You must file the 83(b) election with the IRS within 30 days of the date the equity is granted or the shares are purchased or early-exercised. The window is counted in calendar days, weekends and holidays included, and it starts at the grant or purchase, not when you get around to it. There is effectively no forgiveness for a late election. Miss the 30 days and you generally lose the option entirely, and you are stuck with the default vesting-based taxation. Because the deadline is so unforgiving, the practical rule is to handle the election immediately when you receive the equity, and to keep proof that you filed on time. When It Helps and...

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