ISO Incentive Stock Option Bargain Element & Alternative Minimum Tax (AMT) Calculator

Compute ISO exercise cost, AMT preference item spread, and estimated 28% AMT tax bill.

Estimated ISO AMT Tax Liability (28%)
23,100 USD
Form 6251 AMT Bargain Element Spread 117,500 USD
Cash Needed to Exercise Strike 22,500 USD
AMT-Free Exercise Share Limit 1,489 shares
Inputs
⚡ Scenarios:
Amounts are treated in the selected currency; no foreign-exchange conversion is applied.
options
Number of Incentive Stock Options (ISOs) to exercise and hold.
currency
Grant exercise (strike) price per share.
currency
Current 409A or market FMV per share at exercise.
currency
Estimated spread cushion before triggering AMT crossover.
Results & Graph
Estimated ISO AMT Tax Liability (28%)
23,100 USD
Form 6251 AMT Bargain Element Spread
117,500 USD
Cash Needed to Exercise Strike
22,500 USD
AMT-Free Exercise Share Limit
1,489 shares

Estimated ISO AMT Tax Liability (28%)

Graph 1 • ISO Bargain Element & AMT • Domain Architecture & Live Telemetry Maps Iso Shares To Exercise, Option Strike Price, Current Fair Market Value through ISO Bargain Element & AMT Formula.
ISO Incentive Stock Option Bargain Element & Alternative Minimum Tax (AMT) Calculator • Custom Domain Schematic (Equity Compensation & Tax) Strike / Threshold (USD) • ISO Bargain Element & Iso Shares To Exercise: 5.0k options • Option Strike Price: 4.50 USD ESTIMATED ISO AMT TAX LIAB 23,100 USD • Form 6251 AMT Bargain : 117,500 USD • Cash Needed to Exercis: 22,500 USD Eq: BargainElement = (FMV_at_Exercis
Graph 2 • Estimated ISO AMT Tax Liability (28%) Across Iso Shares To Exercise Sweep (40% → 160%) Evaluates BargainElement = (FMV_at_Exercise − StrikePrice) × ExercisedShares; Es across 7 operating points (current input highlighted).
0 USD 23.6k USD 47.1k USD 3.4k 2.0k 9.9k 3.0k 16.5k 4.0k 23.1k 5.0k 29.7k 6.0k 36.3k 7.0k 42.8k 8.0k
Graph 3 • Joint Sensitivity: Iso Shares To Exercise × Option Strike Price Compares Estimated ISO AMT Tax Liability (28%) when Option Strike Price is shifted +25% (solid) vs. −25% (dashed).
0 USD 19.3k USD 38.5k USD --- Option Strike Price @ 75% 12.1k -30% 16.8k -15% 21.5k +0% 26.2k +15% 30.9k +30%
Summary: Exercising 5,000 ISOs at USD 4.50 (FMV USD 28.00) costs USD 22,500.00 cash and creates a USD 117,500.00 AMT bargain element, triggering ~USD 23,100.00 in AMT (up to 1,489 shares are AMT-free).
Summary: Exercising 5,000 ISOs at USD 4.50 (FMV USD 28.00) costs USD 22,500.00 cash and creates a USD 117,500.00 AMT bargain element, triggering ~USD 23,100.00 in AMT (up to 1,489 shares are AMT-free).
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Formula & Mathematical Methodology: ISO Bargain Element & AMT Formula

BargainElement = (FMVatExercise − StrikePrice) × ExercisedShares
EstAMT = max(0, BargainElement −RemainingAmtCushion) × 28%
BargainElement = (FMV_at_Exercise − StrikePrice) × ExercisedShares; EstAMT = max(0, BargainElement −RemainingAmtCushion) × 28%
  • isoSharesToExercise: Iso Shares To Exercise (options)
  • optionStrikePrice: Option Strike Price (currency)
  • currentFairMarketValue: Current Fair Market Value (currency)
  • amtExemptionHeadroom: Amt Exemption Headroom (currency)

Rounding: Currency outputs round to 2 decimal places; effective rates and multiples display to 2 decimal places.

Worked Example: Benchmark Scenario: ISO Bargain Element & AMT

Compute ISO exercise cost, AMT preference item spread, and estimated 28% AMT tax bill.

  1. Enter your financial, equity compensation, or tax parameters.
  2. Evaluate the governing equation: BargainElement = (FMV_at_Exercise − StrikePrice) × ExercisedShares; EstAMT = max(0, BargainElement −RemainingAmtCushion) × 28%.
  3. Review the primary result, supporting metrics, and 3 interactive SVG charts.
Result: Computes ISO Bargain Element & AMT via BargainElement = (FMV_at_Exercise − StrikePrice) × ExercisedShares; EstAMT = max(0, BargainElement −RemainingAmtCushion) × 28%.

Frequently Asked Questions

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

It evaluates BargainElement = (FMV_at_Exercise − StrikePrice) × ExercisedShares; EstAMT = max(0, BargainElement −RemainingAmtCushion) × 28% directly in your browser and updates three custom SVG visualizations in real time.

Can I use Goal Seek to solve backwards for a target amount?

Yes. Click "🎯 Goal Seek" in the results toolbar to solve backwards for any numeric input parameter.

Are my financial and compensation numbers kept private?

Yes. All calculations execute 100% locally in your browser with zero server transmission.

Finance & Investing · Equity Compensation & Tax

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

Compute ISO exercise cost, AMT preference item spread, and estimated 28% AMT tax bill.

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.
  • Iso Shares To Exercise: Number of Incentive Stock Options (ISOs) to exercise and hold.
  • Option Strike Price: Grant exercise (strike) price per share.
  • Current Fair Market Value: Current 409A or market FMV per share at exercise.

What the calculation includes

With the default values shown, Estimated ISO AMT Tax Liability (28%) is 23,100 USD. The calculation follows ISO Bargain Element & AMT Formula; the formula and variable definitions above show how the inputs combine.

One-input check: With the other defaults held constant, changing Iso Shares To Exercise from 5,000 options to 5,500 options changes Estimated ISO AMT Tax Liability (28%) from 23,100 USD to 26,390 USD. This is a comparison inside the calculator's stated model, not a prediction.

Where to use caution

  • Uses published statutory rules, standard compounding conventions, and marginal tax rates entered by the user.
  • For educational and financial planning analysis; consult a CPA or qualified advisor for personalized tax filings.

Scope: Global / US / India / UK / Canada / Australia Statutory Standards Check the assumptions and limitations against your situation before relying on the estimate.

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