Inputs
Federal Alternative Minimum Tax (AMT) Exposure Estimator
Federal AMT exposure estimate
Enter assumptions and click Calculate to estimate possible federal AMT exposure under a simplified screening model.
Results
Federal AMT Exposure Estimate
Estimated AMT exposure
$0Click Calculate to view the estimate.
| Estimated federal AMT | $0 |
|---|---|
| Estimated regular federal tax before AMT | $0 |
| Estimated adjusted AMT income | $0 |
| AMT exemption used | $0 |
| Estimated AMT base | $0 |
| Estimated additional federal tax exposure | $0 |
| Interpretation | Low estimated AMT exposure |
Chart
Regular federal tax, estimated AMT, and exposure
Estimate details
Federal AMT exposure summary
Income and adjustments
AMT estimate
Assumptions
Tax year: 2026. This is a simplified screening model; AMT source values remain source review pending.
Alternative Minimum Tax, or AMT, is a second federal tax calculation. It is meant to limit situations where certain deductions, exemptions, or preferential tax items reduce regular tax too far.
This calculator is a screening estimate. It compares a simplified regular federal tax estimate with a simplified federal AMT estimate. If the AMT estimate is higher, the difference is shown as possible AMT exposure.
For capital gains, enter the full gain separately from the taxable capital gain already included in taxable income. This helps the calculator avoid counting the regular taxable portion twice.
Regular federal tax before AMT is estimated using simplified federal brackets from OpenBook tax data before detailed personal credits, deductions, and filing-specific adjustments. If shared tax data cannot be loaded, the page uses local assumptions.
Important limitations
This calculator does not reproduce CRA Form T691 and should not be treated as a filing result. The 2026 AMT source values used by OpenBook are screening assumptions marked source review pending. The calculator does not calculate provincial AMT, trust or corporate AMT, detailed AMT carryforward balances, exact credit calculations, or all adjustment items. LCGE-related results are simplified and depend on eligibility and actual filing details.
Common AMT triggers
Common triggers can include large capital gains, lifetime capital gains exemption claims, employee stock option deductions, donations of appreciated publicly listed securities, and large deductions or credits.
Interpretation guidance
Estimated AMT exposure does not always mean permanent extra tax. In some cases, AMT may create a future minimum-tax carryforward that can reduce tax in a later year, depending on future taxable income and tax circumstances.
Professional disclaimer
AMT situations often need professional tax review. Educational information only. This tool is not financial, tax, legal, accounting, investment, retirement, estate, filing, or cross-border planning advice.