Updated July 28, 2026. Quick answer: They are not two competing tax strategies. Withhold to cover is net share settlement under a different label — the company retains shares and no market transaction occurs. Sell to cover is the one that differs: a broker sells shares on the open market, which creates a small reportable sale and a Form 1099-B. You finish with the same share count and the same tax bill either way.
One mechanic, two names — and then a genuinely different one
The naming is inconsistent across providers, which is the entire reason this question gets asked — and it is worse than most explanations admit. Reading the providers’ own participant documentation:
| Provider | Company retains shares | Broker sells shares |
|---|---|---|
| Fidelity | Net Shares | Sell to Cover |
| Morgan Stanley at Work / E*TRADE | Withhold shares | Sell-to-cover |
| Computershare | Withhold to Cover | Sell to Cover |
| Carta | net settlement | — |
| Schwab | publishes no election labels at all | |
“Withhold to cover” is not standard industry vocabulary — in this sample only Computershare uses the phrase. And one label is actively dangerous: net shares names the election at Fidelity, but Schwab uses it for the shares left over after any method, including after an open-market sale. So the same two words mean different things depending on whose statement you are holding.
Ignore the vocabulary and apply one test instead: does a Form 1099-B arrive? If the company retained shares, no sale happened and no 1099-B is issued. If a broker sold shares, one is. That test is stable across every provider, and it is also the only difference that reaches your tax return.
| Election | What physically happens | Shares sold on the market? | 1099-B? |
|---|---|---|---|
| Net shares / withhold to cover / net settlement | The company keeps some of your vesting shares and remits cash to the taxing authorities | No | No |
| Sell to cover | The broker sells just enough shares on the open market to raise the withholding | Yes, a portion | Yes, for that portion |
| Cash transfer / pay cash | You wire cash; every share is delivered to you | No | No |
| Same-day sale / sell all | Every vesting share is sold immediately | Yes, all of them | Yes |
What actually differs
| Withhold to cover | Sell to cover | |
|---|---|---|
| Shares you end up with | Same | Same |
| Tax you owe for the year | Same | Same |
| A sale happens on the market | No | Yes |
| You receive a Form 1099-B | No | Yes |
| A small gain or loss arises between vest and sale | No | Yes, usually pennies |
| Extra line on your return | No | Yes |
So the honest answer is: for you, almost nothing differs. The difference is real but it is administrative. Where it matters is on the return — because that 1099-B is where the double-taxation trap lives, and the withhold-to-cover route never generates one.
Wherever shares are sold, check the basis on the 1099-B. The Form 1099-B instructions are explicit that a broker “cannot increase initial basis for income recognized upon the exercise of a compensatory option or the vesting or exercise of other equity-based compensation arrangements granted or acquired after 2013” (Treas. Reg. §1.6045-1(d)(6)(ii)(A), whose operative words are that a broker “may not increase” initial basis for that income). That is a prohibition, not an option. Note what the date attaches to: when the award was granted or acquired, not when you got the stock — for pre-2014 grants a broker may include the compensation element, which is why 1099-Bs are inconsistent rather than uniformly wrong. This is how the same money gets taxed twice.
Why your employer cares even though you do not
The choice is frequently the company’s rather than yours. Retaining shares means the employer must remit the withholding out of its own cash; routing it through a broker sale means the market supplies that cash instead. Companies managing their cash position often prefer sell to cover for exactly that reason — which is why many plans simply impose one method and offer no election at all.
What you should be looking at instead
Neither method withholds at your rate. Both use the flat supplemental rate, and if your marginal rate is above it you are short regardless of which name your portal uses. That gap is the thing worth your attention.
Sources
IRC §83(a); Treas. Reg. §1.61-2(d)(2)(i) (basis of compensatory shares, the cleanest authority for shares delivered already vested), with Treas. Reg. §1.83-4(b)(1) as support; Treas. Reg. §31.3402(g)-1 (supplemental wage withholding); Treas. Reg. §1.6045-1(d)(6)(ii)(A) and the Instructions for Form 1099-B, current edition (broker basis reporting). Election labels taken from participant-facing documentation published by Fidelity, Morgan Stanley at Work / E*TRADE, Computershare and Carta, read July 2026; Schwab publishes no election labels.
This states what the cited authority says and what plan documents actually do. It is not tax advice, and your employer’s plan controls which of these elections you are offered at all.