# Form 6251

URL: https://pdf.net/pdf-forms/tax-forms/form-6251
Category: Tax Forms
Attributes: Trusted by accountants, Official IRS form, Filed annually

IRS Form 6251 is a document used to calculate the Alternative Minimum Tax (AMT) for individual taxpayers.

With our fillable Form 6251, you can skip the confusing IRS instructions; just enter your figures and download it as a PDF in no time.

## Versions

- 2025 — [download PDF](https://cdn.sanity.io/files/i16te7yp/production/b152cce6ce2951aec1f4f27305134e80e24df37b.pdf)

## How to Fill Out Form 6251

1. Open the editable Form 6251
2. Enter income adjustments from Form 1040
3. Add back preference items like ISOs and SALT
4. Calculate your tentative minimum tax
5. Compare it to your regular tax
6. Download and attach to your return

## Facts

### What Is Form 6251 Used For?

Form 6251 is used to calculate whether an individual owes the Alternative Minimum Tax (AMT), a separate tax system that limits certain deductions, exclusions, and other tax benefits. It accounts for specific AMT adjustments and preference items, such as income from exercising certain incentive stock options, that may receive different treatment under the regular tax system.

### Who Should Use Form 6251?

Taxpayers should file Form 6251 when their income and AMT adjustments or preference items cause their tentative minimum tax to exceed their regular tax, or when certain tax credits require the calculation. Common factors that can affect AMT include exercising incentive stock options and claiming deductions for state and local taxes.

### When Is Form 6251 Due?

The Form 6251 due date is the same as that for the individual income tax return and is generally due by April 15. If you receive an automatic filing extension, the return and Form 6251 can generally be filed by October 15, although any tax owed is still due by the original April deadline.

### What Happens If Form 6251 Is Not Submitted?

If Form 6251 is not submitted, the IRS may recalculate your liability, bill you for the unpaid alternative minimum tax, and add penalties plus interest for late payment. Correcting the omission generally means filing an amended return with the missing form attached.

### How and Where Do I File Form 6251?

You file Form 6251 as an attachment to your individual income tax return, and it can generally be submitted electronically or with a paper return. If filing by mail, you should send it with your return to the IRS address listed in the instructions for that underlying return.