ESPP Grant Date: Purchase Price, $25,000 Cap, and Tax Clock

In a Section 423 Employee Stock Purchase Plan, the ESPP grant date is the first day of the offering period, when your employer formally grants you the option to buy company stock at a future purchase date.¹ That single date drives three things that decide what your shares are really worth after tax: the price you pay through the lookback, the $25,000 annual purchase cap, and the two-year holding clock that separates ordinary income from long-term capital gains.

Grant Date vs. Enrollment Date

The grant date is not the day you signed up. Enrollment happens earlier, in a sign-up window before the offering period opens, when you pick your contribution percentage. The grant date arrives after enrollment closes and the offering period officially begins. That is when the option becomes legally real.

Some plan documents use “offering date” and “grant date” interchangeably. In a simple six-month plan with a single purchase period, they usually are the same day. In plans with overlapping or multi-year offering periods, they can diverge, and it is the grant date, not the offering date, that anchors the tax rules below.

How the Grant Date Sets Your Purchase Price

If your plan has a lookback provision, the grant-date stock price is one of the two figures compared to set your cost. The lookback takes the fair market value on the grant date and the fair market value on the purchase date, picks the lower of the two, and applies the plan’s discount to that lower price.¹

Federal law caps that discount at 15%, so the purchase price cannot drop below 85% of the relevant fair market value.¹ Most plans use the full 15%. A worked example:

Grant-date price: $50 per share
Purchase-date price: $65 per share
Lookback selects $50 (the lower)
Purchase price: $50 × 0.85 = $42.50
Built-in gain at purchase: $22.50 per share

If the stock falls between the two dates, the lookback simply flips and uses the purchase-date price. Plans without a lookback apply the discount to the purchase-date price alone. Either way, a lower grant-date price is a better grant-date price for you.

Reset Provisions in Overlapping Offerings

Some companies run overlapping offerings, with a new 12- or 24-month period starting every six months. These plans often include a reset: if the stock drops below your original grant-date price, you are automatically moved into the newer offering, which carries a lower grant-date benchmark. The catch is that the reset restarts your two-year qualifying-disposition clock from the new grant date.

The $25,000 Annual Purchase Cap

Federal law limits how much stock you can accrue rights to under a Section 423 plan to $25,000 of fair market value per calendar year, measured at the grant-date price.¹ Not the purchase-date price. Not the discounted price. The grant-date price.

If the stock is worth $50 on your grant date, the maximum for that calendar year is 500 shares ($25,000 ÷ $50), even if the shares are worth $80 apiece by the time you buy them. The cap applies across all Section 423 plans your employer and its parent or subsidiary companies run, so participating in multiple plans does not get you around it.

In a multi-year offering, you accrue $25,000 of purchase rights for each calendar year the offering is open, and unused rights from earlier years within that same offering can roll forward. Once the offering ends, any unused rights expire.

The Two-Year Clock That Governs Your Tax Rate

Whether your sale is taxed mostly as ordinary income or mostly as long-term capital gains depends on two holding periods. To get qualifying disposition treatment, you must hold the shares at least two years after the grant date and at least one year after the purchase date.¹ Miss either one and it is a disqualifying disposition.

The two-year clock from the grant date is almost always the longer of the two, so it is the deadline most people need to watch. No tax is owed when the shares are actually transferred to you on the purchase date; the tax event is deferred until you sell.²

Qualifying Disposition

Meet both holding periods and the ordinary income portion is the lesser of your actual gain or the discount based on the grant-date price.¹ Anything above that is a long-term capital gain, taxed at 0%, 15%, or 20% depending on your income for 2026.³

Back to the earlier example. Grant-date price $50, 15% discount is $7.50 per share, purchase price $42.50. You later sell for $80, a total gain of $37.50 per share. The ordinary income piece is $7.50 (the grant-date discount, which is less than the $37.50 gain). The remaining $30 per share is a long-term capital gain.

If the stock fell and you sold at a loss, the ordinary income amount would be the actual gain, which could be zero, and you could claim a capital loss.

Disqualifying Disposition

Sell before either holding period is up and the entire spread between the purchase-date fair market value and what you paid becomes ordinary income. Using the same numbers, the purchase-date price was $65 and you paid $42.50, so $22.50 per share is ordinary income.

The rate gap is the whole point. The top federal ordinary rate for 2026 is 37%.³ Long-term capital gains top out at 20%. On a $22.50 spread across 500 shares, selling a few weeks before the two-year mark can cost roughly $1,900 in additional federal tax at the highest bracket compared to the 20% rate.

What Form 3922 Records

After each purchase, your employer files Form 3922 with the IRS and gives you a copy.⁴ It records the grant date in Box 1, the purchase date in Box 2, the fair market value on both dates, and the price you paid per share.⁵ Keep every 3922. It is the most reliable source for the exact grant-date price when you eventually sell and need to run the qualifying-disposition math.

The Cost Basis Trap on Form 8949

This is where ESPP participants get double-taxed. When your broker reports the sale on Form 1099-B, the cost basis it lists is usually just the discounted price you actually paid, with no adjustment for the ordinary income you owe on the discount. Report that number as-is and you pay tax on the discount twice: once as ordinary income, and again as a phantom capital gain.

Fix it on Form 8949. Enter the broker-reported basis in column (e), put code “B” in column (f) to flag an incorrect basis, and enter the adjustment in column (g).⁶ The adjustment equals the ordinary income you recognized on the sale. Adding it back to your basis cancels the phantom gain.

For qualifying dispositions, federal law does not require the employer to withhold on the ordinary income portion, so you are responsible for paying that tax yourself at filing.¹ Disqualifying disposition income may or may not show up on your W-2 depending on employer practice, so check the W-2 in the year you sell and report the income on your return even if it is missing.

If You Leave Before the Purchase Date

Leaving the company before the purchase date does not lock in your grant-date price for a future purchase. Your accumulated after-tax contributions are refunded, and no shares are bought on your behalf. Section 423 requires that you stay employed through a date no earlier than three months before the option is exercised, and most plans simply end participation on your last day.¹ If a purchase date is close, timing a departure for after it can be worth several months of contributions at the full discount.

1
Office of the Law Revision Counsel. 26 USC 423 – Employee Stock Purchase Plans
2
Office of the Law Revision Counsel. 26 USC 421 – General Rules
3
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
4
Internal Revenue Service. About Form 3922, Transfer of Stock Acquired Through an Employee Stock Purchase Plan
5
Internal Revenue Service. Form 3922, Transfer of Stock Acquired Through an Employee Stock Purchase Plan Under Section 423(c)
6
Internal Revenue Service. Instructions for Form 8949