Incentive Stock Option (ISO) Exercise Bargain Element & AMT Calculator

Estimate ISO bargain element spread and 26%–28% AMT exposure before exercising.

Total Cash Needed (Exercise + Estimated AMT)
USD 55,400.00
Option Strike Exercise Cost USD 22,500.00
AMT Bargain Element Spread USD 117,500.00
Estimated AMT Tax Liability USD 32,900.00
Inputs
Amounts are treated in the selected currency; no foreign-exchange conversion is applied.
options
Number of ISO options being exercised and held.
USD
Option grant strike / exercise price per share.
USD
Current 409A or market fair value per share.
%
Applicable marginal AMT tax rate (26% or 28%).
Results & Graph
Total Cash Needed (Exercise + Estimated AMT)
USD 55,400.00
Option Strike Exercise Cost
USD 22,500.00
AMT Bargain Element Spread
USD 117,500.00
Estimated AMT Tax Liability
USD 32,900.00

Total Cash Needed (Exercise + Estimated AMT)

Graph 1 • Options To Exercise Sensitivity Recalculates the domain equation across 50% to 150% of the primary input while holding other parameters constant.
0 USD 44.9k USD 89.7k USD 50%: 27,700 USD 27.7k 50% 75%: 41,550 USD 41.5k 75% 100%: 55,400 USD 55.4k 100% 125%: 69,250 USD 69.3k 125% 150%: 83,100 USD 83.1k 150%
Graph 2 • Primary & Supporting Metric Comparison Compares the primary output alongside supporting domain benchmarks.
Total Cash Needed (Exercise + Estimated AMT) USD 55,400.00 Option Strike Exercise Cost USD 22,500.00 AMT Bargain Element Spread USD 117,500.00 Estimated AMT Tax Liability USD 32,900.00
Graph 3 • Exact Output Table & Units Displays each calculated output in its exact domain unit.
Total Cash Needed (Exercise + Estimated AMT)USD 55,400.00Option Strike Exercise CostUSD 22,500.00AMT Bargain Element SpreadUSD 117,500.00Estimated AMT Tax LiabilityUSD 32,900.00
Summary: Exercising 5,000 ISOs requires USD 22,500.00 strike cash and creates a USD 117,500.00 AMT bargain element (~USD 32,900.00 estimated AMT).
Summary: Exercising 5,000 ISOs requires USD 22,500.00 strike cash and creates a USD 117,500.00 AMT bargain element (~USD 32,900.00 estimated AMT).
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Formula & Mathematical Methodology: ISO Exercise & AMT Mathematical Formula

ExerciseCost = Shares × Strike
BargainElement = Shares × max(0, FMV − Strike)
EstimatedAMT ≈ BargainElement × 0.28
ExerciseCost = Shares × Strike; BargainElement = Shares × max(0, FMV − Strike); EstimatedAMT ≈ BargainElement × 0.28
  • optionsToExercise: Options To Exercise (options)
  • strikeExercisePrice: Strike Exercise Price (USD)
  • currentFairMarketValue: Current Fair Market Value (USD)
  • effectiveAmtRatePct: Effective Amt Rate Pct (%)

Rounding: Intermediate calculations retain full IEEE-754 floating-point precision; displayed currency and ratios round to 2 decimal places.

Worked Example: Benchmark Scenario: ISO Exercise & AMT

Estimate ISO bargain element spread and 26%–28% AMT exposure before exercising.

  1. Enter the portfolio, option, lease, or corporate balance-sheet inputs.
  2. Evaluate the core equation: ExerciseCost = Shares × Strike; BargainElement = Shares × max(0, FMV − Strike); EstimatedAMT ≈ BargainElement × 0.28.
  3. Inspect the primary valuation output, risk metrics, and 3 visual SVG graphs.
Result: Computes ISO Exercise & AMT using ExerciseCost = Shares × Strike; BargainElement = Shares × max(0, FMV − Strike); EstimatedAMT ≈ BargainElement × 0.28.

Frequently Asked Questions

How does the Incentive Stock Option (ISO) Exercise Bargain Element & AMT Calculator calculate results?

It evaluates ExerciseCost = Shares × Strike; BargainElement = Shares × max(0, FMV − Strike); EstimatedAMT ≈ BargainElement × 0.28 directly in your browser and updates the three domain SVG visualizations immediately as you adjust any input.

Can I compare multiple investment or financing scenarios side by side?

Yes. Click "Compare (0/3)" in the results toolbar to pin up to three scenarios side by side.

Are my financial numbers kept private?

Yes. All calculations run 100% locally in your browser with zero server uploads.

Finance & Investing · Compensation & Equity Tax

Incentive Stock Option (ISO) Exercise Bargain Element & AMT Calculator: inputs, method, and how to read the result

Estimate ISO bargain element spread and 26%–28% AMT exposure before exercising.

Choose inputs for the case you are checking

The defaults are illustrative. Replace them with values for your case and keep the units shown beside each field.

  • Display Currency: Amounts are treated in the selected currency; no foreign-exchange conversion is applied.
  • Options To Exercise: Number of ISO options being exercised and held.
  • Strike Exercise Price: Option grant strike / exercise price per share.
  • Current Fair Market Value: Current 409A or market fair value per share.

What the calculation includes

With the default values shown, Total Cash Needed (Exercise + Estimated AMT) is USD 55,400.00. The calculation follows ISO Exercise & AMT Mathematical Formula; the formula and variable definitions above show how the inputs combine.

One-input check: With the other defaults held constant, changing Options To Exercise from 5,000 options to 5,500 options changes Total Cash Needed (Exercise + Estimated AMT) from USD 55,400.00 to USD 60,940.00. This is a comparison inside the calculator's stated model, not a prediction.

Where to use caution

  • Uses standard quantitative finance, GAAP/IFRS operating ratios, and continuous/periodic compounding conventions.
  • For educational and analytical modeling only; consult a licensed CPA, CFA, or fiduciary advisor before executing tax or derivative transactions.

Scope: Global Financial & Corporate Valuation Standard Check the assumptions and limitations against your situation before relying on the estimate.

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