SAR Exercise Tax Calculator (2026)

Stock appreciation rights (SARs) pay out the spread between your grant price and the current stock price — as shares (stock-settled) or cash (cash-settled). Either way, that spread is ordinary income, taxed like a paycheck: federal income tax at your real marginal rate, FICA, and state tax. This calculator estimates your full 2026 tax bill and shows how many net shares you receive after employer withholding, or your true cash payout after all taxes.

How SARs are taxed at exercise

Whether your SAR settles in stock or cash, the tax rule is the same: the spread — (FMV at exercise − grant price) × SARs exercised — is ordinary wage income under IRC § 83.¹ Your employer reports it on your W-2 and withholds at the 22% supplemental withholding rate (37% if the exercise value exceeds $1 million in a calendar year).

That 22% rate is systematically low for high earners. If your salary already puts you in the 32%, 35%, or 37% federal bracket, the SAR spread stacks on top and is taxed at your real marginal rate — which can exceed 50% in California (37% federal + 13.3% state). The gap between 22% withheld and your actual liability creates an April shortfall you must fund separately.

Stock-settled SARs: shares received after withholding

When a stock-settled SAR is exercised, no cash changes hands initially. The company converts your spread into gross shares (spread ÷ FMV at exercise), withholds a portion of those shares to cover mandatory payroll withholding, and delivers the remainder to your brokerage. Your cost basis in the delivered shares equals the FMV at exercise — the amount already reported as W-2 income. Any appreciation above that basis is a capital gain if you sell later.

Because employer withholding is capped at 22% of the spread, the shares withheld typically don't cover the full tax liability for senior-level employees. The calculator shows how large the April gap is so you can plan accordingly.

Cash-settled SARs: no shares, no LTCG path

Cash-settled SARs pay the spread as bonus compensation. Same ordinary income tax treatment at exercise — but your income ends there. No shares, no cost basis, no ability to hold for long-term capital gains on future appreciation. In exchange, you avoid single-stock concentration risk and receive liquidity without any selling decision. If you want LTCG potential on future price growth, you'd need to separately invest the after-tax cash in the same company's stock, restarting a new holding period.

SARs vs. NSOs: identical tax, different mechanics

Stock-settled SARs and NSOs produce the same federal tax result: W-2 ordinary income on the spread, at the same marginal rates, with the same FICA treatment. The difference is mechanical. NSOs require you to pay the exercise price in cash to receive shares; stock-settled SARs net the math internally — no cash outlay, fewer shares delivered — but the IRS sees the same income event under IRC § 83 either way.² Employees often choose SARs over NSOs precisely because no upfront cash is needed to exercise, making them accessible even at high stock prices.

Planning considerations

• Time your exercise around the SS wage base: Social Security tax (6.2%) applies to wages up to $184,500 in 2026.³ If your salary already exceeds that by year-end, exercising SARs late in the year — after the wage base is saturated — saves 6.2% on the full spread. On a $500,000 SAR exercise, that's $31,000 in avoided FICA.
• Spread across multiple tax years: If you have discretion over when to exercise and the spread is large, partial exercises over two or three years can keep annual income below the 35% or 37% federal bracket thresholds. Weigh bracket savings against the risk that the stock price rises further (increasing the spread you'll eventually pay tax on).
• State workday allocation: If you've relocated since the grant date, your former state may claim tax on a workday-allocated portion of the spread. California (FTB Pub. 1100) and New York (TSB-M-07(7)I) both have sourcing rules for compensation earned during multi-state employment. The calculator uses your current state only — consult a specialist if you've moved since the SAR was granted.
• For stock-settled SARs — sell or hold? Once shares are delivered, you face the same hold-vs-sell decision as any equity holder. Your cost basis is set at FMV on exercise day; holding adds concentration risk in exchange for potential LTCG treatment on further appreciation. Evaluate that tradeoff independently from the grant mechanics.