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The Daily Insight

What is the maximum amount of mortgage interest you can deduct?

Author

Ava Robinson

Published Apr 06, 2026

$750,000
Mortgage Interest Deduction Limit Today, the limit is $750,000. That means this tax year, single filers and married couples filing jointly can deduct the interest on up to $750,000 for a mortgage if single, a joint filer or head of household, while married taxpayers filing separately can deduct up to $375,000 each.

What is excess mortgage interest?

If the amount of home mortgage interest or qualified mortgage insurance premiums you deduct on Schedule A, Itemized Deductions, is limited, enter the part of the excess that qualifies as a direct or indirect expense.

What’s the limit for the mortgage interest deduction?

In past years, owners of a principal or second home could take an itemized deduction for their interest on mortgage debt of up to $1 million ($500,000 for married persons filing separate returns), plus home equity debt of up to $100,000.

What’s the limit for taking out a mortgage after 2017?

For mortgages taken out after 2017, the combined total of mortgage debt plus additional home equity debt (used to improve or renovate a house) is capped at the new $750,000 threshold. Are you thinking of purchasing a second home??

What’s the maximum amount of interest you can claim on a second home?

Today, according to the IRS, the maximum mortgage amount you can claim interest on is $750,000 on first or second homes if the loan was taken after Oct 13, 1987. You can also deduct interest on $100,000 for a second mortgage loan used for anything other the purchase of your first or second home.

When do new rules for mortgage debt come into effect?

With the new rules for mortgage debt and home equity debt fully in place as of December 15, 2017, taxpayers will need to pay close attention to the tax ramifications of refinancing existing home mortgages and of using home equity loans, prior to making their financial decisions.