IRS Rules on Cash-Out Refinance Interest Deductions (2026 Guide)

Last updated 10/08/2025 by

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Summary:

Mortgage interest from a cash-out refinance is generally tax-deductible only if the funds are used to buy, build, or substantially improve the home that secures the loan. Interest tied to personal spending, debt consolidation, or investing typically is not deductible. Deductibility is also subject to mortgage debt limits and itemizing rules. This guide explains the IRS definitions, limits, and examples so you can avoid common mistakes.

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What the IRS Allows (and Disallows)

Deductible: Interest on the portion of your loan used to buy, build, or substantially improve the same home securing the mortgage.
Not deductible: Interest on amounts used for personal expenses (e.g., credit card payoff), travel, tuition, or investing.
Same-home rule: The improvements must be for the home that serves as collateral for the mortgage.

Plain-English definition of “substantially improve”: Work that adds value, prolongs useful life, or adapts your home to a new use (e.g., additions, new roof, major kitchen/bath, structural or systems upgrades). Routine repairs alone (e.g., paint, minor fixes) usually don’t qualify.

Debt Limits & Itemizing Recap

Mortgage debt limits: Interest is generally deductible on up to a combined $750,000 of home acquisition/improvement debt ($375,000 if married filing separately). Older “grandfathered” mortgages may have different limits.
Itemizing required: You must itemize deductions instead of taking the standard deduction to claim mortgage interest.
Second homes: Similar rules apply if the loan is secured by the second home and the funds improve that same property.

Cash-Out Refi Uses: Deductible or Not?

Scenario	Use of Funds	Deductible?	Notes
Kitchen & bath remodel (primary home)	Substantial improvements	Yes (subject to limits)	Keep contracts, invoices, and before/after scope docs.
Debt consolidation	Pay off credit cards	No	Interest on this portion is not deductible.
Roof + siding + windows	Energy/structural upgrades	Yes	Save itemized receipts by project.
Down payment for investment property	Investment use	No (for home interest)	Different (complex) rules can apply for investment interest; consult a tax pro.
Second home remodel	Substantial improvements	Yes	Loan must be secured by that same second home.

Mixed-Use Funds: How to Allocate Interest

If you use cash-out proceeds for both improvements and personal spending, you must allocate interest between deductible and non-deductible portions.

Example Mix	Amount	Tax Treatment
Kitchen remodel	$40,000	Deductible interest (subject to debt limits)
Credit card payoff	$10,000	Not deductible
Total cash out	$50,000	Allocate interest 80% deductible / 20% non-deductible

Refi Nuances You Should Know

Roll-in costs: If you roll closing costs into the new balance, that portion generally does not create a deductible use.
Tracing rules: The IRS expects a paper trail to connect loan proceeds to qualifying expenses.
Timing: Improvements paid soon after closing are easier to document than projects started long before the refinance.

Recordkeeping Checklist

Settlement statement and loan documents
Contracts, change orders, invoices, receipts
Photos/plans/specs showing substantial improvement
Spreadsheet tracking how every dollar was used

Pros and Cons

WEIGH THE RISKS AND BENEFITS

Here is a list of the benefits and drawbacks to consider.

Alternatives to Consider

Home Equity Loan vs. Cash-Out Refinance – Keep your current first-mortgage rate and add a fixed-rate second lien.
Cash-Out Refinance vs. HELOC – HELOCs offer flexible draws for phased projects; interest may be deductible when used for improvements.
Home Equity Agreement for Renovations or Repairs – Access equity with no monthly payments; repayment at sale or buyback.
Cash-Out Refinance Guide – Requirements, timelines, costs, and lender comparisons.

Is Your Cash-Out Interest Deductible?

If your cash-out funds will substantially improve the same home securing the loan—and you itemize—some or all of the interest may be deductible, subject to debt limits. If the funds are for personal spending or debt payoff, that portion’s interest won’t qualify. When in doubt, document everything and consult a tax professional.

Key Takeaways

Deductibility hinges on use of funds—improvements qualify; personal uses don’t.
Debt limits and itemizing rules cap how much interest you can deduct.
Mixed-use loans require allocating interest between deductible and non-deductible portions.
Detailed records are essential to substantiate your deduction.

What’s Next

Compare offers from vetted cash-out refinance lenders and confirm how much equity you can access for qualifying improvements.

Pro tip: Get multiple quotes and ask lenders to show scenarios for “improvements-only” funding. Pair your quote with a simple spreadsheet to track uses so your tax preparer can allocate interest correctly.

Explore More in This Cash-Out Refinance Series

Cash-Out Refinance Requirements – What lenders look for and how to qualify.
Cash-Out Refinance for Debt Consolidation – Total-cost math, risks, and safer strategies.
Cash-Out Refinance for Home Improvements – Equity math, ROI by project, and tax considerations.
Pros and Cons of a Cash-Out Refinance – Break-even analysis and when it’s worth it.

FAQs

Can I deduct interest if I used cash-out funds for both renovations and credit card payoff?

Partially. You’d generally allocate interest based on the percentage used for qualifying improvements vs. non-qualifying personal uses.

Are routine repairs deductible?

Usually no. Routine maintenance and minor repairs don’t typically count as “substantial improvements.”

What about second homes?

Similar rules apply if the loan is secured by—and the funds are used to improve—that second home. Debt limits still apply, and you must itemize.

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