RV mortgage vs pay cash — loan rates 2026, deduction reality

What makes an RV a 'qualified residence' for tax purposes

Per IRS Publication 936 (2025 edition, applicable for 2026 tax years), a second home qualifies for the mortgage interest deduction only if it has sleeping, cooking, and toilet facilities. An RV that meets these three tests can be treated as a second home, but the loan must be secured by the RV (or the land if the RV is permanently affixed in a way that creates a security interest under state law). Typical chattel RV loans secured only by the vehicle as personal property generally do not qualify as acquisition indebtedness under 26 USC 163(h).

The publication is explicit: you can treat only one second home as a qualified home in any year. If you rent it out part of the year, you must also use it as a home during the year for more than the greater of 14 days or 10% of the days you rent it. Data as of June 2026. The current text of Publication 936 and your specific loan documents control; the rules have been stable but always verify the latest IRS guidance before claiming the deduction.

A 'second home not rented out' can be treated as qualified even if you do not use it during the year, but for RVers who use the rig as their primary residence part of the year or rent it, the use tests become material. The deduction is limited to interest on acquisition debt (debt used to buy, build, or substantially improve the qualified residence) and is subject to the overall home mortgage interest caps in effect for the tax year.

• ›Qualified residence test (Pub 936): sleeping + cooking + toilet facilities required for RV to count as second home
• ›Loan must be secured by the qualified residence (chattel loans often fail this)
• ›Only one second home per year can be treated as qualified
• ›If rented part-year, personal use test applies (greater of 14 days or 10% of rental days)
• ›Acquisition debt only — not cash-out or equity used for other purposes

Real 2026 rate environment and when financing makes sense

Federal Reserve Senior Loan Officer Opinion Survey data and lender surveys for early 2026 show RV loan rates for prime credit (FICO 740+) typically ranging 6.5–9.5% APR, a premium to new auto loans that reflects faster depreciation and the collateral's mobility. Longer 'RV mortgage' products for high-value Class A and fifth-wheels may carry different terms, sometimes 15–20+ years, but availability is limited and underwriting is stricter.

Paying cash avoids the depreciation risk premium in the rate and the complexity of proving the deduction. Financing can make sense when the after-tax cost of the loan (if the interest is deductible) is lower than the opportunity cost of the cash, or when preserving liquidity for other uses is important. The math only works if the RV actually meets the qualified residence test and the debt is properly secured — many buyers discover after the fact that their loan does not qualify.

Points paid on a loan secured by a second home are subject to additional limits and are often amortized over the life of the loan rather than deducted upfront. Always use the worksheets in the current Publication 936 and retain the settlement statement and security instrument.

Practical decision framework and common pitfalls

Before signing a loan, obtain the exact security instrument language and ask the lender in writing whether the loan is structured as acquisition indebtedness secured by a qualified residence under the rules in Publication 936. If the RV does not have the required facilities or the loan is a standard chattel loan without a mortgage-like security filing, the interest is almost certainly personal interest and not deductible.

Refinancing an existing RV loan or using a HELOC on your primary home to 'pay cash' for an RV purchase generally does not produce deductible interest on the new debt unless the proceeds are traced to buying, building, or substantially improving a qualified residence that secures the debt. The tracing rules are strict.

Grandfathered debt rules from pre-2018 may still apply to older loans, but new 2026 purchases are under current law. The publication contains detailed examples and worksheets; relying on lender marketing language instead of the actual code and pub is a common and expensive mistake.