If you exercised incentive stock options (ISOs) and triggered alternative minimum tax (AMT), you may have built up an AMT credit (often called an “AMT carryforward credit”). A common question is: What happens to that credit if you die before you’ve used it?
Below is a high-level overview of how this usually works. (Tax rules can be nuanced, so it’s important to confirm your specific situation with a qualified tax professional.)
Quick refresher: what the ISO AMT credit is
When you exercise ISOs and hold the shares, the “bargain element” can be included in AMT income—even though you may not have sold the stock yet. If that increases your AMT, you may be eligible to claim a credit in future years when your regular tax exceeds your tentative minimum tax.
In plain English: it’s often a way to “recover” AMT paid due to ISO timing differences, but recovery can take years.
In many cases, unused AMT credit does not survive the taxpayer
As a general rule, tax credits and carryforwards are personal tax attributes. When a taxpayer dies, any unused AMT credit is typically limited to use on the taxpayer’s final income tax return (and, if applicable, on returns included in the final filing period rules). If the credit can’t be used because there isn’t enough regular tax liability to absorb it, the remaining credit is often lost.
What about married couples?
If you file Married Filing Jointly in the year of death, the final return is generally a joint return for you and your spouse. In that case, any AMT credit reflected on that joint return may be usable to the extent the return’s tax calculations allow it.
However, if the AMT credit is effectively tied to the deceased taxpayer and can’t be used on the final return, it typically can’t be “transferred” to heirs like an inherited asset.
Can the estate use the AMT credit?
Usually, the AMT credit is an individual income tax credit, not an asset that becomes part of the probate estate the way bank accounts or brokerage holdings do. The estate has its own tax filing regime, and individual AMT credits generally don’t carry over for the estate to use in the same manner.
Planning implications (without alarm bells)
This topic often comes up alongside broader estate and equity-compensation planning:
- Exercise and holding decisions: The timing and size of ISO exercises can influence how much AMT is generated and how quickly a credit might be used.
- Charitable and gifting strategies: These can change taxable income patterns, which may affect whether AMT credits are usable in a given year.
- Recordkeeping: Maintaining clear documentation of ISO exercises, AMT calculations, and carryforward amounts can make final return preparation smoother.
Next steps
If you believe you have a sizable ISO AMT credit, consider asking your CPA to estimate:
- How much AMT credit is currently available, and
- How likely it is to be used over time based on projected income, deductions, and filing status.
If you’d like, we can coordinate with your tax professional to ensure your equity compensation, tax planning, and estate planning are aligned.