Box (BOX) RSU sell-vs-hold
Calculator · free · no signup · BOXSell at vest or hold? Compare after-tax payout from selling Box RSUs at vest vs. holding through the LTCG cliff at 12 months.
Beta · invite-only · AlphaLatitude Inc. · Free Tools
Your vest
Tax inputs
Hold strategy
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.
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 BOX today.
Most diversification frameworks would advise against a purchase that size in a single name; the right answer depends on your conviction in BOX. 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.
Request beta access →Related calculators: RSU Lot Order Calculator · Stock Concentration Calculator
About Box
Box (BOX) is a public Cloud/SaaS company, incorporated in Delaware and headquartered in Redwood City, CA.
Equity grants at Box typically include restricted stock units (RSUs).
Box, Inc. is an American public company based in Redwood City, California. It develops and markets cloud-based content management, collaboration, and file sharing tools for businesses. Box was founded in 2005 by Aaron Levie and Dylan Smith. Initially, it focused on consumers, but around 2009 and 2010 Box pivoted to focus on business users. The company raised about $500 million over numerous funding rounds before going public in 2015. Its software allows users to store and manage files in an online folder system accessible from any device. Users can then comment on the files, share them, apply workflows, and implement security and governance policies.
Source: Wikipedia (CC BY-SA 4.0)
Aaron Levie and Dylan Smith started the company in 2005 as a college project for online file storage, then pivoted away from consumers when Dropbox and Google made storage free. The enterprise version sells content management with retention rules, legal holds, and governance controls that regulated industries require, which is the durable difference from consumer sync tools. Growth slowed after the 2015 listing and an activist campaign followed in 2021. Box is headquartered in Redwood City, California.
Sources: box.com · en.wikipedia.org
Equity comp at Box
- 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 Box.
Box (BOX) 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 Box tools → · Use the generic RSU Sell-vs-Hold Calculator for any company. Diversifying multiple RSU lots? See the lot-by-lot sell order →
Box equity questions
- Should I sell or hold my Box RSUs at vest?
- Box 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 Box grant ISOs, NSOs, or RSUs?
- Equity compensation at Box typically takes the form of restricted stock units (RSUs). Restricted stock units are taxed as ordinary income when they vest.
- Do Box RSUs use double-trigger vesting?
- No. Box 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.
One piece of the puzzle.
OptionsAhoy plans your Box equity alongside hedging, vesting, and de-concentration, across bullish, neutral, and bearish market scenarios. Free during beta.