Most non-resident buyers who take out a French mortgage choose a standard capital-repayment structure: fixed rate, fixed monthly payment, principal paid down over 15 to 25 years. For most profiles, that is the correct choice. But there is a second structure in the French market — used predominantly by investors — that rarely comes up in initial broker conversations, and even less frequently in English-language guidance on French property finance.
It is called the prêt in fine. Loosely translated: an interest-only mortgage. In the right circumstances, it can materially reduce the net cost of borrowing on a ski property purchase — not because the headline rate is cheaper, but because of how French rental income tax interacts with the loan structure.
What the Prêt In Fine Actually Is
The mechanics are straightforward. With a prêt in fine, you pay only the interest each month. The full capital borrowed — every euro — is repaid as a single lump sum at the end of the agreed term. There is no progressive amortisation. A €300,000 in fine loan held for 15 years carries a €300,000 balance on day one and a €300,000 balance on the final day before repayment.
This distinguishes it sharply from a standard prêt amortissable, where each payment contains a growing slice of capital and a shrinking slice of interest. In a repayment mortgage, your interest exposure — and therefore your potential interest deduction if you are renting the property — declines every year. In a prêt in fine, interest stays constant throughout the full term. That distinction is precisely what makes the structure interesting for investors operating under French rental income tax rules, and what makes it inappropriate for the majority of buyers whose primary intention is personal enjoyment of the property.
The Nantissement: The Capital Goes to Work, Not Nowhere
The obvious question: if you are not paying down capital each month, how does the bank expect to be repaid at maturity? The answer is the nantissement — a pledge of collateral, almost always an assurance-vie policy or a securities portfolio held with the lending institution.
At origination, the bank typically requires an initial nantissement equivalent to at least 30% of the loan amount, placed into the pledged account. The borrower then makes regular contributions to that account over the loan term, with the accumulated balance — growing through returns on the underlying investments — expected to cover the lump-sum capital repayment at maturity.
If the pledged assurance-vie generates net returns above the effective after-tax cost of the mortgage interest, the structure can become largely self-funding. The spread between what the nantissement earns and what the interest costs — after the tax deduction — determines whether the in fine arrangement produces a net economic gain over a standard repayment mortgage.
This is why the product suits buyers who already hold investable assets that can be pledged: the capital is not idle during the loan term, it is working. Pledging assets as nantissement does not require liquidating them; they remain invested and compounding, while simultaneously serving as the bank's security.
The Tax Case — Why Higher Interest Is Not the Problem
Prêt in fine rates run higher than standard amortising mortgage rates. According to Empruntis, the in fine rate premium is typically 20 to 30% above the equivalent amortising rate — translating to roughly 0.5 to 1.0 percentage points in absolute terms at current market rates. For a buyer financing a property purely for personal occupation, paying more in interest with no capital reduction makes no sense.
For a rental investor operating under the French régime réel, the logic inverts. Under the régime réel, all interest on a loan used to finance a rental property is fully deductible from French rental income, with no cap on the deductible amount — as set out by the French tax authority at impots.gouv.fr. Because in fine interest payments remain constant throughout the loan term rather than declining progressively, the deductible amount stays at its maximum for the entire life of the loan.
The higher the borrower's marginal tax rate on French income, the greater the effective interest reduction. At a 30% marginal rate, a €1,000 monthly interest payment costs €700 net after the deduction. At 41%, it costs €590. For investors already generating taxable French rental income, the after-tax cost of borrowing on an in fine basis can fall below what a lower-rate repayment mortgage costs on a pre-tax basis — before even accounting for returns on the nantissement.
The régime réel election is non-negotiable for this strategy to work. Non-residents earning rental income from French ski property who opt for the micro-BIC or micro-foncier forfait cannot deduct interest and receive no in fine benefit whatsoever. The régime réel is generally the correct election for any property generating meaningful rental income, but confirm this with a French tax adviser for your specific situation.
What Rates Look Like in June 2026
Standard French fixed mortgage rates in June 2026 sit at the following levels, according to the Capifrance/Cafpi monthly rate barometer:
- Lowest rates (strongest borrower profiles): 2.82% over 10 years — 3.05% over 20 years — 3.20% over 25 years
- Average rates: 3.02% over 10 years — 3.32% over 20 years — 3.43% over 25 years
- Standard market rates: 3.48% over 10 years — 3.84% over 20 years — 3.98% over 25 years
Non-residents typically pay a margin of 0.10 to 0.40 percentage points above these benchmarks. Applying the in fine rate premium of 0.5 to 1.0 points on top of that places a realistic prêt in fine rate for a non-resident ski property investor somewhere between 3.8% and 4.8% on a 15 to 20-year term in the current market. The best-positioned borrowers — those with substantial pledgeable assets, established banking relationships in France, and a clean credit history — sit toward the lower end of that range.
These headline rates matter less in isolation than in relation to the borrower's marginal tax rate and the return available on the pledged nantissement. Both variables are highly specific to the individual and must be modelled across the full loan term, not just year one.
Who This Structure Suits — and Who It Does Not
The prêt in fine is not a universal improvement on the standard French mortgage. It becomes compelling only when several conditions are simultaneously present.
You have pledgeable assets. The nantissement requirement — minimum 30% of the loan amount, maintained throughout the term — is non-negotiable. Buyers who have deployed most of their liquidity as a deposit cannot typically satisfy this. Buyers holding existing investment portfolios, assurance-vie policies, or securities accounts have a viable route.
You intend to rent the property and generate taxable French income. Without a genuine rental income position to shelter, the tax advantage does not exist and the higher rate is simply a cost. Buyers using the property predominantly for personal occupation should use a standard repayment mortgage — the Domosno mortgage calculator can model those scenarios quickly.
Your marginal French income tax rate is meaningful. The benefit scales directly with the rate. At an 11% marginal rate, the interest deduction barely offsets the rate premium. At 30% and above, the economics begin to shift. At 41% or 45%, the in fine structure can materially outperform an amortising loan on a net cost basis over the full term.
You have a credible plan for the terminal lump sum. Whether through accumulated nantissement returns, a future asset sale, a planned refinance, or some combination, the capital repayment at maturity must be accounted for from the outset. Banks model this at origination; so should you.
Non-Resident Specific Considerations
Non-residents can access prêt in fine financing in France, but the pool of lenders is narrower than for standard amortising products. Retail branches of major French banks are unlikely to process in fine applications for non-residents efficiently. Private banking divisions and specialist lenders — reached via experienced mortgage brokers with a direct track record in this product — are the practical route.
French banks apply the HCSF 35% debt service cap to in fine structures as they do to all mortgages. The monthly interest payment must sit within this ratio against verified income. And as covered in our guide on how banks assess rental income in a French mortgage application, projected rents from the ski property may be factored in — but at a conservative discount applied by the lender, not at face value.
Loan-to-value on in fine structures for non-residents is generally capped at 60 to 70% — tighter than the 70 to 80% typically available on well-qualified amortising applications. A larger upfront equity contribution is therefore required, which again points toward the borrower profile this product is designed for.
The assurance emprunteur requirement applies to in fine loans just as it does to repayment mortgages. Because the full capital remains at risk throughout the entire term — no amortisation reduces the bank's exposure over time — some insurers price the cover at a slight premium on in fine structures. Include this in any total cost comparison.
When Not to Use It
The prêt in fine produces favourable comparisons primarily on paper and primarily for a defined investor profile. It is not a universal tax arbitrage and it carries genuine risk. The pledged assurance-vie must perform to meet the terminal repayment; if returns disappoint over a 15 to 20-year horizon, the borrower bears the shortfall. The rate premium is a real, ongoing cost. And the structure is easier to unwind through a property sale before maturity than to service if the nantissement underperforms against expectations.
If your primary objective is capital-efficient ownership of a French Alps new-build ski property, a standard fixed-rate repayment mortgage at today's levels remains the most straightforward and lowest-risk structure for the majority of buyers. The prêt in fine is a specialist instrument, not a default alternative.
Getting the Analysis Right
The decision between an amortising mortgage and a prêt in fine is not one to make on headline rates. It depends on your exact tax position in your country of residence, your effective French income tax rate on rental profits, the quality and liquidity of assets available for nantissement, the returns achievable on the pledged vehicle, and the total fee structure of the lender offering the product.
Model both structures on an after-tax, after-fee basis across the full loan term — not the first year's payments. A specialist mortgage broker with genuine in fine experience for non-resident investors in France is not optional here; this is not a product for retail bank branches or general financial advisers without direct French market expertise. Contact us if you want to explore whether your situation makes a prêt in fine worth modelling properly.
