What Is IRS Form 8396: Mortgage Interest Credit?

IRS Form 8396 is the federal tax form you file to claim the Mortgage Interest Credit, a dollar-for-dollar reduction in your tax bill available to homeowners who hold a Mortgage Credit Certificate (MCC) issued by a state or local housing finance agency.¹ You file it every year you want to claim the credit, for as long as the mortgage lasts and the home is still your principal residence.

Who Files Form 8396

Only homeowners with a valid Mortgage Credit Certificate can file this form. The IRS does not issue MCCs. State or local housing finance agencies do, usually through a participating lender, and you apply before closing on the home.²

To qualify for an MCC in the first place, you generally must be a first-time homebuyer (no principal residence in the prior three years), meet income and purchase price limits set by the issuing agency, and use the home as your principal residence.³ Homes in federally designated targeted areas may be exempt from the first-time buyer rule.⁴ Once issued, the certificate stays valid for the life of the mortgage. You don’t get a new one each year; you just file Form 8396 annually.

How to Calculate the Credit

The calculation is simple. Take the mortgage interest you paid during the year and multiply it by the certificate credit rate printed on your MCC. That rate is set between 10% and 50%, depending on the program.⁵

One cap changes the answer for higher-rate certificates. If your rate is above 20%, the maximum credit you can claim in any single year is $2,000, regardless of how much interest you paid.⁴ At 20% or below, there’s no dollar cap, and you claim the full calculated amount. So a homeowner who paid $12,000 in interest at a 25% rate gets $2,000, not $3,000. At a 15% rate on the same interest, the credit would be $1,800 with no cap.

How to File the Form

You’ll need two documents. Your MCC gives you the certificate number, the issuing agency’s name, and the credit rate. Your lender’s Form 1098 shows how much mortgage interest you paid for the year.⁶ If your MCC covers only part of the loan, allocate the interest so you’re calculating the credit on just the certified portion.

The credit is non-refundable. It can bring your federal income tax down to zero, but it won’t produce a refund by itself. Form 8396 has a credit limit worksheet that compares your calculated credit to your remaining tax after certain other credits; you claim the smaller of the two. The final credit lands on Schedule 3 (Form 1040), line 6g, and you attach the completed Form 8396 to your return.⁵

What It Does to Your Mortgage Interest Deduction

If you itemize on Schedule A, you have to reduce your mortgage interest deduction by the amount of the credit. That prevents you from getting both a full deduction and a full credit for the same interest.⁵ The credit is still usually the better deal, because it cuts your tax directly instead of just lowering taxable income.

If you take the standard deduction, this adjustment doesn’t apply. You can still claim the Mortgage Interest Credit either way. For many MCC holders, the standard deduction beats the reduced itemized amount anyway, so the standard deduction plus the credit is often the strongest combination.

Carrying Forward Unused Credit

If your credit is larger than your tax for the year, the unused portion carries forward for up to three tax years.⁴ The current year’s credit is used first, then carryforwards starting with the oldest.

Watch one trap. Amounts lost to the $2,000 annual cap don’t carry forward. Only amounts limited by your actual tax liability do.⁵ If your calculated credit was $3,000 and the cap knocked it to $2,000, the extra $1,000 is gone permanently. But if your $2,000 credit exceeded a $1,500 tax bill, the $500 difference carries forward.

Refinancing With an MCC

Refinancing doesn’t automatically end the credit, but the original issuing agency has to reissue your MCC, and the reissued certificate has to meet several conditions:⁵

It must cover the same property and be issued to the same holder.
It must fully replace the original; you can’t keep a piece of the old one.
The certified loan amount can’t exceed the outstanding balance on the original certificate.
The credit rate can’t go up.
The reissued certificate can’t produce a larger line 3 amount than the original would have in any tax year.

In the refinance year, if the two certificates carry different rates, attach a statement to your return with separate calculations for each portion of the year. Even at a lower interest rate on the new loan, the credit is measured against what the original MCC would have allowed, so refinancing won’t increase it. Housing agencies usually charge a reissuance fee. Contact your agency early so the reissued MCC is in place before closing.

If You Sell Before Nine Years Are Up

Selling within nine years of closing can trigger a separate recapture tax that claws back part of the federal subsidy. It is calculated on Form 8828, not Form 8396, and reported on Schedule 2.⁷ Recapture depends on how long you held the home, your gain on the sale, and whether your income at the time of sale exceeds an adjusted qualifying threshold; if your income hasn’t risen above that threshold, no recapture is owed.⁸ Any recapture is also capped at 50% of the gain. After nine full years, it no longer applies, and a sale caused by death is exempt.

1
Internal Revenue Service. About Form 8396, Mortgage Interest Credit
2
FDIC. Affordable Mortgage Lending Guide – Mortgage Tax Credit
3
NCSHA. Mortgage Credit Certificate Program Q and A
4
Office of the Law Revision Counsel. 26 USC 25 – Interest on Certain Home Mortgages
5
Internal Revenue Service. Form 8396 – Mortgage Interest Credit
6
Internal Revenue Service. Instructions for Form 1098
7
Internal Revenue Service. Instructions for Form 8828 – Recapture of Federal Mortgage Subsidy
8
Office of the Law Revision Counsel. 26 USC 143 – Mortgage Revenue Bonds