Merck (MRK) RSU sell-vs-hold

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Sell at vest or hold? Compare after-tax payout from selling Merck RSUs at vest vs. holding through the LTCG cliff at 12 months.

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Your vest

pre-IPO? enter price manually

Tax inputs

Hold strategy

1 yr
20%
20%
10.0%

Best after-tax payout — at year 1 yr

$47,709

Sell + invest wins by $4,981 over Hold 1 yr.

Estimates only. Not financial advice.

This vest pushes your top federal rate from 24% to 35%. Hover the Federal value below for the bracket-by-bracket slicing.

Heads-up: under-withholding. Your employer withholds federal tax at the IRS supplemental rate (22.0% on this vest, ≈ $17,600). Your marginal federal rate on this vest is 32.7%, owing $26,171. Expect to settle the $8,571 gap at tax time.

The hidden purchase

Tax was paid at vest either way. Holding is mathematically equivalent to taking $44,509 in after-tax cash and buying $44,509 of MRK today.

Most diversification frameworks would advise against a purchase that size in a single name; the right answer depends on your conviction in MRK. Holding past one year converts the gain to LTCG.

Sell + invest

Best payout
Vest value (shares × price)$80,000
Federal
State
Medicare−$1,160
Additional Medicare−$720
Market gain over 1 yr at 10.0%$4,451
Cap-gain tax on diversified gain — LTCG (federal + state + NIIT)−$1,251
Net at year 1 yr$47,709

Sell every share at vest; invest the after-tax cash at the market return for 1 yr, then liquidate. Diversified — no single-stock concentration risk.

Hold 1 yr

Vest value (shares × price)$80,000
Vest tax (federal + state + FICA)
Net at year 1 yr$42,728

Sold 444 shares to cover vest tax (net-settled); kept 556 shares 1 yr to qualify for long-term capital gains.

Social Security + Medicare are payroll taxes (collectively called FICA) — they apply because you're still employed at vest.

Both columns are stated in year-1 yr dollars. The sell side compounds at the market return; the hold side compounds at your single-stock expected return after a 20% volatility drag.

Estimates only. Assumes net-settled (sell-to-cover) vesting; double-trigger and pre-IPO RSUs are out of scope. Excludes multi-state moves, AMT interactions on other equity, and 83(b) elections. Not financial advice.

You evaluated one RSU vest. The beta plans every vest of every grant across years, with concentration and AMT in the loop.

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Related calculators: RSU Lot Order Calculator · Stock Concentration Calculator

About Merck

Merck (MRK) is a public Other company, incorporated in New Jersey and headquartered in Rahway, NJ.

Equity grants at Merck typically include restricted stock units (RSUs).

Merck & Co., Inc. is an American multinational pharmaceutical company headquartered in Rahway, New Jersey. The company does business as Merck Sharp & Dohme or MSD outside the United States and Canada. The company is ranked fifth on the list of largest biomedical companies by revenue.

Source: Wikipedia (CC BY-SA 4.0)

The American company began in 1891 as the United States arm of the German Merck and was expropriated during the First World War, which is why it operates as MSD outside North America. Keytruda, an immunotherapy approved in 2014, became one of the best-selling drugs anywhere and now supplies a large share of revenue, creating a concentration risk as its exclusivity approaches the end of the decade. Animal health and vaccines including Gardasil diversify the base. Headquarters are in Rahway, New Jersey.

Sources: merck.com · en.wikipedia.org

Equity comp at Merck

  • RSUs use single-trigger vesting: shares become yours as each portion vests on schedule, and the value is taxed as ordinary income at that point. No IPO or acquisition is required.

Researched 2026-08-17.

OptionsAhoy is an independent tool and is not affiliated with, endorsed by, or sponsored by Merck.

Merck (MRK) RSUs vest as ordinary income at the price on vest day. The decision is whether to sell at vest and reinvest, or hold the shares through the 12-month LTCG cliff. This calculator runs both paths through the same after-tax math so you can compare like-for-like.

All Merck tools → · Use the generic RSU Sell-vs-Hold Calculator for any company. Diversifying multiple RSU lots? See the lot-by-lot sell order →

Merck equity questions

Should I sell or hold my Merck RSUs at vest?
Merck restricted stock units (RSUs) are taxed as ordinary income on their value at vest whether or not you sell. The only open decision is what to do with the shares afterward: sell at vest and reinvest, or hold past twelve months for long-term capital-gains treatment on any further gain. The calculator above runs both paths through the same after-tax math so you can compare them directly.
Does Merck grant ISOs, NSOs, or RSUs?
Equity compensation at Merck typically takes the form of restricted stock units (RSUs). Restricted stock units are taxed as ordinary income when they vest.
Do Merck RSUs use double-trigger vesting?
No. Merck restricted stock units (RSUs) use single-trigger vesting: each tranche becomes yours as it vests on schedule, taxed as ordinary income at that point, with no liquidity event required.
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