Quick Answer
Yes, you can deduct mortgage interest on a second home if it's a qualified residence. The 2026 limit is $750,000 total mortgage debt for both homes combined (or $1 million for pre-2017 mortgages). Interest on up to $100,000 in home equity debt is also deductible if used for home improvements.
Best Answer
Michelle Woodard, JD
Best for owners of second homes used primarily for personal vacation purposes
Second home mortgage interest rules
Yes, you can absolutely deduct mortgage interest on a second home, but the rules are more complex than primary residence interest. According to IRS Publication 936, you can deduct qualified residence interest on up to two homes: your main home and one second home.
Current mortgage interest limits (2026)
The Tax Cuts and Jobs Act limits apply:
These limits apply to the combined mortgage debt on both your primary and second home.
Example: Two-home mortgage interest calculation
David owns:
Result: David can deduct the full $40,000 in mortgage interest ($26,000 + $14,000) on Schedule A.
What if you exceed the debt limits?
If your total mortgage debt exceeds $750,000, you must allocate the deduction:
Example: Sarah has $900,000 total mortgage debt
Allowable deduction: $54,000 × ($750,000 ÷ $900,000) = $45,000
What qualifies as a second home?
The IRS requires the second home to be a "qualified residence":
Home equity loans and lines of credit
Starting in 2018, home equity interest is only deductible if the loan proceeds are used to "buy, build, or substantially improve" the home that secures the loan.
Deductible: $50,000 HELOC used to add a deck to your vacation home
Not deductible: $50,000 HELOC used to buy a car or pay off credit cards
Key factors affecting second home deductions
Special considerations for 2026
The One Big Beautiful Bill Act maintained the $750,000 limit but expanded some related deductions. Consult current IRS guidance for the latest updates.
What you should do
1. Add up your total mortgage debt on both homes to ensure you're under the limit
2. Keep detailed records of which home each mortgage payment applies to
3. Track home equity loan usage to ensure deductibility
4. Use our refund estimator to see how much the second home interest deduction could save you
5. Consider timing of major purchases if close to the debt limit
Key takeaway: Second home mortgage interest is fully deductible up to $750,000 total debt limit, potentially saving $3,000-$8,000 annually in taxes for typical vacation home owners. Keep detailed records and ensure the property qualifies as a residence.
*Sources: [IRS Publication 936](https://www.irs.gov/pub/irs-pdf/p936.pdf), [IRS Topic 505](https://www.irs.gov/taxtopics/tc505)*
Key Takeaway: Second home mortgage interest is fully deductible within the $750,000 combined debt limit, potentially saving vacation home owners $3,000-$8,000 annually in federal taxes.
Second home mortgage interest deduction scenarios
| Total Mortgage Debt | Annual Interest Paid | Deductible Amount | Tax Savings (24% bracket) |
|---|---|---|---|
| $600,000 | $36,000 | $36,000 (100%) | $8,640 |
| $900,000 | $54,000 | $45,000 (83.3%) | $10,800 |
| $1,200,000 | $72,000 | $45,000 (62.5%) | $10,800 |
More Perspectives
Robert Kim, CPA
Best for homeowners considering selling a second home or managing multiple properties
Second home sales and mortgage interest timing
When selling a second home, mortgage interest deductibility continues until the sale closes. However, the year of sale creates unique planning opportunities and complications.
Interest deduction through sale date
You can deduct mortgage interest paid up to the closing date. If you sell on July 15, you can deduct 6.5 months of interest payments.
Example: Jennifer sells her beach condo on August 1, 2026
Capital gains considerations
Unlike primary residences, second homes don't qualify for the $250,000/$500,000 capital gains exclusion. However, years of claimed mortgage interest don't affect the capital gains calculation directly.
Timing strategies for year of sale
Refinancing before sale
If you refinanced your second home, ensure the new mortgage still qualifies:
Key takeaway: Second home mortgage interest remains deductible through the sale date, but strategic timing of payments and understanding capital gains implications can optimize your overall tax situation.
Key Takeaway: Mortgage interest on second homes remains deductible until sale, and strategic payment timing can maximize deductions in the year of sale.
Michelle Woodard, JD
Best for owners who treat their second home primarily as rental income property
Rental property vs. second home treatment
If your "second home" is primarily rented out, the mortgage interest treatment changes significantly. You must choose between treating it as a second home (Schedule A) or rental property (Schedule E).
The personal use test
If you use the property personally more than the greater of:
It's considered a second home, not pure rental property.
Tax treatment comparison
Second Home (Schedule A):
Rental Property (Schedule E):
Example: Beach house decision
Carlos owns a $300,000 beach house with $250,000 mortgage (7% = $17,500 annual interest). He rents it 200 days and uses it personally 10 days.
Personal use: 10 days < 20 days (10% of 200 rental days)
Result: Treated as rental property
Strategic considerations
Sometimes limiting personal use to stay under the threshold provides better tax benefits, especially for high-income taxpayers who can't itemize effectively.
Key takeaway: Properties used primarily for rental income often benefit more from rental property treatment than second home mortgage interest deductions, especially when mortgage debt exceeds $750,000 limits.
Key Takeaway: Investment properties often benefit more from rental treatment than second home deductions, allowing unlimited mortgage interest deduction and depreciation benefits.
Sources
- IRS Publication 936 — Home Mortgage Interest Deduction
- IRS Publication 527 — Residential Rental Property
Reviewed by Michelle Woodard, JD on February 28, 2026
This content is for educational purposes only and is not a substitute for professional tax advice. Consult a qualified tax professional for advice specific to your situation.