{"schema_version":"1.0","generated_by":"COLE — Citation Operations & Legal Engine","product_id":"iso-amt-sniper","title":"ISO AMT Exercise Sniper","site":"https://taxchecknow.com/us/check/iso-amt-sniper","authority":"IRS","authority_url":"https://www.irs.gov","jurisdiction":"United States","language":"en-US","currency":"USD","last_verified":"April 2026","legislation":"IRC Section 56(b)(3) — Alternative Minimum Tax on ISO Exercise Spread","legal_anchor":"IRC Section 56(b)(3)","deadline":{"iso_date":"2026-12-31T23:59:59.000-05:00","display":"December 31, 2026","description":"Year-end deadline for ISO exercise decisions — AMT calculated on calendar year basis","urgency_label":"YEAR-END DEADLINE"},"key_facts":{"amt_trigger":"ISO exercise spread (FMV − strike) — IRC §56(b)(3)","amt_exemption_2025_single":"$88,100 — 2026 subject to IRS inflation adjustment, verify at IRS.gov/Form6251","amt_exemption_2025_mfj":"$137,000 — 2026 subject to IRS inflation adjustment, verify at IRS.gov/Form6251","amt_rate":"26% / 28% — threshold inflation-adjusted, see Form 6251 instructions","credit_recovery":"IRC §53 · Form 8801 — Minimum Tax Credit","employer_reporting":"IRS Form 3921 (at exercise)","legal_anchor":"IRC §56(b)(3) · IRS Form 6251 instructions"},"formula":"AMT Income = Regular Income + (FMV − Strike Price) × Shares Exercised. Tentative Minimum Tax = AMT Income × 26% up to the annual AMT rate threshold (see IRS Form 6251 instructions, inflation-adjusted), 28% above. AMT Due = Max(0, Tentative Minimum Tax − Regular Tax).","thresholds":[{"label":"Under 1,000 shares with small spread (under $10)","value":1,"status":"clear"},{"label":"1,000–5,000 shares with moderate spread ($10–$50)","value":2,"status":"approaching"},{"label":"5,000–20,000 shares with significant spread ($50–$100)","value":3,"status":"trap"},{"label":"Over 20,000 shares or spread above $100","value":4,"status":"deep_trap"},{"label":"Not sure of my spread or 409A valuation","value":5,"status":"risk"}],"common_ai_errors":[{"error_id":1,"ai_says":"ChatGPT says: ISOs are completely tax-free until you sell the shares","correct":"Reality: ISO exercise creates AMT preference income immediately at the spread (FMV minus strike). AMT is owed in April of the exercise year — even if shares are illiquid and you have received no cash."},{"error_id":2,"ai_says":"ChatGPT says: AMT is rare and unlikely to affect you","correct":"Reality: Any employee with significant ISO grants at a growing company with increasing 409A valuations is at real risk. The AMT exemption phases out rapidly above $1.24M income (MFJ), and high earners lose the exemption entirely."},{"error_id":3,"ai_says":"ChatGPT says: You can avoid AMT by waiting to sell","correct":"Reality: AMT is triggered at exercise, not sale. Waiting to sell does not avoid AMT. The tax is calculated on the exercise date spread regardless of subsequent sale timing."},{"error_id":4,"ai_says":"ChatGPT says: AMT is a permanent tax — you cannot get it back","correct":"Reality: AMT paid on ISO exercise creates a Minimum Tax Credit (Form 8801). This credit offsets future regular tax liability in years when your regular tax exceeds your tentative minimum tax."},{"error_id":5,"ai_says":"ChatGPT says: The 409A valuation does not affect your tax at exercise","correct":"Reality: The 409A fair market value is the key number. AMT income = (409A − strike price) × shares exercised. A rising 409A valuation directly increases your AMT exposure."}],"faq":[{"id":1,"question":"What triggers AMT on ISO exercise?","answer":"The bargain element — the spread between the 409A fair market value and your strike price at the time of exercise — is treated as AMT preference income. This is added to your regular income to compute tentative minimum tax. If tentative minimum tax exceeds regular tax, you owe AMT."},{"id":2,"question":"What is the safe exercise range?","answer":"The safe exercise range is the number of shares you can exercise before your tentative minimum tax exceeds your regular tax. It depends on your salary, other income, AMT exemption, and the spread on your options. Every employee has a different safe range."},{"id":3,"question":"What is the AMT exemption for ISO exercise?","answer":"The 2025 AMT exemption confirmed by the IRS is $88,100 (single filer) and $137,000 (married filing jointly). 2026 figures are subject to IRS inflation adjustment — verify current amounts at IRS.gov/Form6251 before filing. The exemption phases out at $0.25 for every dollar above the top threshold (also inflation-adjusted annually)."},{"id":4,"question":"Do I still owe AMT if my shares are illiquid?","answer":"Yes. AMT is triggered at exercise regardless of whether you can sell your shares. If you exercise options in a private company and cannot sell, you still owe AMT in April of the following year. This is the liquidity trap that catches most employees."},{"id":5,"question":"What is Form 8801 and how does it help?","answer":"Form 8801 is used to claim the Minimum Tax Credit — a credit for AMT paid in prior years. In future years when your regular tax exceeds your tentative minimum tax, the credit offsets your regular tax liability, effectively recovering the AMT you previously paid."},{"id":6,"question":"What is a disqualifying disposition?","answer":"A disqualifying disposition occurs when you sell ISO shares within 1 year of exercise or 2 years of grant date. This converts the gain from capital gains to ordinary income — but it also reverses the AMT preference, potentially reducing or eliminating the AMT."},{"id":7,"question":"Should I exercise early in the tax year?","answer":"Exercising early in the year gives you the option to do a disqualifying disposition before year-end if AMT would be too large. It also gives you more time to plan your tax position. Never exercise in December without calculating the AMT first."},{"id":8,"question":"What is the 83(b) election for early exercised ISOs?","answer":"For early-exercise ISOs (before vesting), you can file an 83(b) election within 30 days of exercise. This locks in the AMT spread at a low 409A valuation. If the 409A rises significantly later, the AMT preference is based on the lower value at exercise — potentially saving significant AMT."},{"id":9,"question":"What is the AMT rate?","answer":"AMT is calculated at 26% up to the annual AMT rate threshold (inflation-adjusted — see IRS Form 6251 instructions), and 28% on amounts above that. This compares to regular income tax rates which can be higher — but regular tax allows deductions that AMT does not."},{"id":10,"question":"Can I spread ISO exercises across multiple tax years?","answer":"Yes. Exercising ISOs in multiple tax years allows you to use your safe exercise range each year, gradually exercising your grant without triggering AMT in any single year. This is a common strategy for large grants."},{"id":11,"question":"What happens to my AMT credit if I never recover it?","answer":"The AMT credit can be carried forward indefinitely. It does not expire. If you have years with high income where your regular tax significantly exceeds your tentative minimum tax, you may be able to recover the credit quickly. The credit is a real asset."},{"id":12,"question":"What is the 409A valuation and why does it matter?","answer":"A 409A valuation is an independent appraisal of the fair market value of a private company's common stock, required by IRC Section 409A. The most recent 409A valuation is the number used to calculate the AMT spread at exercise. A higher 409A means more AMT exposure."}],"sources":[{"title":"IRS — Incentive Stock Options (Topic 427)","url":"https://www.irs.gov/taxtopics/tc427"},{"title":"IRS — Alternative Minimum Tax (Topic 556)","url":"https://www.irs.gov/taxtopics/tc556"},{"title":"IRS — Form 6251 Instructions (AMT)","url":"https://www.irs.gov/forms-pubs/about-form-6251"},{"title":"IRS — Form 8801 (AMT Credit — IRC §53)","url":"https://www.irs.gov/forms-pubs/about-form-8801"},{"title":"IRS — Form 3921 (Employer ISO Reporting)","url":"https://www.irs.gov/forms-pubs/about-form-3921"},{"title":"Machine-readable JSON rules","url":"/api/rules/iso-amt-sniper"}],"products":{"tier1":{"name":"Your Zero-AMT Exercise Map","price":67,"currency":"USD","description":"How many shares can you safely exercise without triggering AMT?","url":"https://taxchecknow.com/us/check/iso-amt-sniper/success/assess"},"tier2":{"name":"Your AMT Recovery System","price":147,"currency":"USD","description":"Turn your AMT tax loss into a recoverable asset with Form 8801","url":"https://taxchecknow.com/us/check/iso-amt-sniper/success/plan"}},"monitor_urls":["https://www.irs.gov/taxtopics/tc427","https://www.irs.gov/taxtopics/tc556"],"canonical":"https://taxchecknow.com/us/check/iso-amt-sniper","api_endpoint":"/api/rules/iso-amt-sniper","generated_at":"2026-04-23T04:26:44.663Z"}