Your Job's Stock Purchase Plan: The 15 Percent Discount Most People Leave on the Table

If your employer is a public company, there is a good chance it offers something called an employee stock purchase plan — an ESPP — and a good chance you have never looked at it. That is a shame, because for a lot of workers it is one of the best deals in their entire benefits package. An ESPP lets you buy your company's stock at a discount, usually 5 to 15 percent off the market price, using money taken straight out of your paycheck. It is not complicated, it is not risky in the way people assume, and the discount alone makes it worth understanding.

Here is how a typical plan works. You sign up during an enrollment window and choose a percentage of your paycheck to contribute — usually up to 10 or 15 percent, capped at $25,000 a year by IRS rules. The money accumulates over an offering period, usually six months. At the end of that period, on what is called the purchase date, the plan uses your accumulated money to buy company stock at a discount. If the discount is 15 percent, you pay 85 cents for every dollar of stock. The shares land in your account, and they are yours.

The part that makes ESPPs genuinely good is the lookback provision, which a lot of plans include. With a lookback, your purchase price is based on the lower of the stock price at the start of the offering period or the price on the purchase date — then the discount applies on top of that. Say the stock was $80 at the start of the period and $100 on the purchase date. With a 15 percent discount and a lookback, you pay 15 percent off the lower price: $80 times 0.85, or $68 a share, for stock worth $100. That is a 32 percent gain on day one. Even without a lookback, buying at a 15 percent discount and selling immediately locks in a return that is hard to find anywhere else. This is why financial planners who are skeptical of almost everything tend to like ESPPs.

The tax treatment is the part people overthink. There are two kinds of ESPP: qualified plans, which most large employers offer, and non-qualified plans. In a qualified plan, the discount is taxed as ordinary income when you sell, and any additional gain is taxed as a capital gain — short-term if you sell within a year of purchase, long-term if you hold longer. The rules around qualifying versus disqualifying dispositions are genuinely confusing, but the practical takeaway is simple: if you sell immediately, the discount is taxed as regular income, which is fine, because you still keep most of the gain. Do not let tax confusion stop you from participating. The tax bill on a discount is a good problem to have.

So what is the catch? The main one is concentration risk. You already depend on your employer for your paycheck, your health insurance, and maybe your retirement match. If you also hold a big chunk of your savings in the same company's stock and the company hits trouble, you lose your income and your investments at the same time. Enron is the extreme example, but it does not have to be fraud — any company can have a bad year. That is why the standard advice is to sell the shares soon after purchase and diversify the money into something broader, like an index fund. You capture the discount and you do not end up with your whole financial life riding on one employer. Some plans have a holding period before you can sell — check yours — but most let you sell right away.

There are a few other things to check before you enroll. Make sure the discount is real: some plans only offer 5 percent, which is still worth taking but less exciting. Check whether your plan has a lookback, because that changes the math a lot. Check the purchase dates and the enrollment windows, because you usually cannot join mid-period — you have to wait for the next window. And be honest about your cash flow: the contributions come out of your paycheck before you see them, so if money is already tight, starting at 10 percent might pinch. Start at 2 or 3 percent, see how it feels, and raise it later. Even a small contribution captures the discount.

Should you max it out? If you can afford the paycheck reduction and your plan offers a 10 to 15 percent discount with a lookback, maxing it out is one of the highest-return moves available to a regular employee — you are essentially getting a guaranteed discount on an asset you can sell the same day. If money is tight or the discount is small, contribute what you can. The worst ESPP decision is not participating at all because the paperwork looked boring. Check your benefits portal, find the enrollment window, and sign up. A 15 percent discount on your own employer's stock is a raise your boss already approved. All you have to do is claim it.

Disclosure: This article was drafted with AI assistance and reviewed by the author.