Some benefits packets include a chance to own part of the company you work for — through an Employee Stock Purchase Plan, restricted stock, or options. These can be genuinely valuable, but they're wrapped in jargon and tax wrinkles that make people either over-invest or ignore them entirely. This lesson decodes the mechanics so the choice is an informed one. It describes how these programs work; it does not tell anyone how much of their pay to tie to one company's stock.
ESPP: the discount and the lookback
An Employee Stock Purchase Plan lets you buy company shares through payroll deductions, usually at a discount. Over an "offering period" (often six months), a set percentage of each paycheck is held back; at the end, that money buys shares at a reduced price.
Two features do the heavy lifting:
- The discount — commonly up to 15% off the share price. Buy at $85 what the market prices at $100.
- The lookback — the plan prices your purchase off the lower of the price at the start of the period or the end. If the stock rose, you still buy at the older, cheaper price, then get the discount on top.
| Feature | What it does | Typical figure |
|---|---|---|
| Discount | Buys shares below market price | up to 15% |
| Lookback | Prices off the lower of start/end | 6-month window |
| Contribution cap | Limits how much salary you can route in | IRS limits apply |
That combination is what makes a well-designed ESPP attractive on the purchase itself, before any opinion about whether the stock goes up later.
Vesting, RSUs, and options at a high level
Beyond an ESPP, companies grant equity that you earn over time. The key word is vesting — you don't own a grant all at once; you earn it on a schedule, often over four years.
- RSUs (restricted stock units) are a promise of actual shares as they vest. When they vest, they're worth the share price — there's nothing to "buy." They're treated as income at vesting.
- Stock options give the right to buy shares later at a set "strike" price. They're valuable only if the share price climbs above the strike; otherwise they can expire worthless.
The broader idea of owning a stake — your equity in the company — is the same thread whether it arrives as an ESPP purchase, RSUs, or options. What differs is when you own it and how it's taxed.
| Form | What you get | When you own it |
|---|---|---|
| ESPP | Discounted shares you buy | At each purchase date |
| RSUs | Granted shares, no purchase | As each tranche vests |
| Options | Right to buy at a strike price | After vesting, if you exercise |
Concentration risk: the part people miss
Here's the trap. When your paycheck and a chunk of your investments both come from one company, a bad year for that company hits your income and your savings at the same time. Financial educators call this concentration risk — too many eggs in one basket, where the basket is also your employer.
History has hard examples: employees who held most of their savings in their own company's stock and lost both job and nest egg when the company failed. The educational point isn't "never hold employer stock" — it's that a single stock, especially the one that signs your paycheck, carries a risk a diversified mix doesn't. Many people set a personal ceiling on how much of one company they'll hold, then sell down to it as shares vest.
Tax timing, in plain English
Equity is taxed at more than one moment, and the details get individual fast — this is a place where the plan documents and a tax professional matter more than any article. At a concept level:
- ESPP: the discount is generally taxed as income, and any gain or loss after purchase is taxed when you sell. How much depends on how long you hold — a "qualifying" versus "disqualifying" sale.
- RSUs: the value at vesting is taxed as income (often with shares automatically withheld to cover it — the same withholding idea as a paycheck), and later gains are taxed when sold.
- Options: taxation depends on the option type and when you exercise and sell.