Buying Property in the Border Zone with a CHF Salary: Banking Rules
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- Debt ratio when buying property on a CHF salary: a cross-border worker buying in France remains subject to the HCSF cap of 35% of net income, mortgage insurance included, over 25 years at most (27 years for off-plan purchases, VEFA).
- Haircut on the Swiss salary: to hedge against currency risk, the French bank deducts 10% to 15% from the net CHF salary, depending on the lender, before converting it, which reduces borrowing capacity.
- CHF loan: the foreign currency loan, permitted by the MCD Directive for borrowers whose income is in the loan currency, removes the currency risk on the monthly payment as long as the salary stays Swiss; if the Swiss job is lost, that risk turns against the borrower.
- Down payment: in practice, banks ask for at least 10% of the property price, ideally 20%; on a CHF 100,000 down payment, a bank exchange margin of around 1.5% costs CHF 1,500.
1. How much can you borrow on a CHF salary?
Working in Switzerland undeniably offers higher purchasing power, making cross-border workers highly sought-after by French banks. However, credit institutions apply rigorous prudential rules dictated by the French High Council for Financial Stability (HCSF).
The 35% HCSF Standard
Since 2022, the maximum debt-to-income ratio is legally capped at 35% of your net income (including mortgage insurance). Furthermore, the maximum duration of a mortgage loan cannot exceed 25 years (or 27 years in the case of off-plan property purchases - VEFA), under the HCSF decision of 29 September 2021. The same decision gives banks some flexibility: up to 20% of their quarterly production of new mortgage loans may deviate from these criteria.
The cross-border specificity: the haircut on the CHF salary
This is where the calculation differs from a standard French employee. Because your income is in CHF and your loan (or daily expenses) will mostly be in EUR, the bank factors in the exchange rate risk.
To calculate your borrowing capacity, the bank does not take your full salary converted at the daily rate. It first applies a margin of safety (haircut) to your net Swiss salary, between 10% and 15% depending on the lender.
If you earn CHF 6,000 net per month, your salary is worth €6,300 at the daily rate (e.g., 1 CHF = 1.05 EUR). With a 10% haircut, the bank only takes CHF 5,400 into account, converted at the same rate: the income used for the 35% calculation is €5,670 instead of €6,300. The maximum monthly payment therefore drops from about €2,205 to about €1,985, which reduces your borrowing capacity accordingly.
2. Choosing the financing: a loan in euros or a foreign currency loan (CHF)?
As a cross-border worker, you have access to a credit structure reserved for a handful of borrowers: the foreign currency loan. It is crucial to understand its advantages, but especially its limitations in the event of life changes.
| Standard loan in euros (EUR) | Foreign currency loan (CHF) |
|---|---|
| The borrowed capital and monthly payments are denominated in euros. | The capital and monthly payments are denominated in Swiss francs, although the property is purchased in euros. |
| The natural risk: You bear the exchange rate risk every month when repatriating your Swiss salary to pay the installment in euros. | The direct advantage: Elimination of the exchange rate risk on the monthly payment, as you repay the bank in the same currency as your salary. |
| Legality: Accessible through all banks. | Legality: Restricted by the MCD directive. Authorized only if the borrower receives income or holds assets in the currency of the loan (French Code de la consommation, art. L313-64). |
| In case of unemployment or returning to France: You will receive income in euros (French salary or unemployment benefits) to repay a loan in euros. The currency risk remains zero, the monthly payment remains fixed in local currency. | The absolute danger: If you lose your Swiss job or decide to work in France, you will earn euros but must repay in CHF. You will then bear the full brunt of the exchange rate risk: if the franc appreciates, the euro cost of your monthly payment will explode, jeopardizing your solvency. |
Expert Note: Historically, the CHF loan was sought after because interest rates in Swiss francs (SARON reference rate) were lower than euro rates (Euribor). In September 2026, the gap between policy rates remains wide: the Swiss National Bank kept its policy rate at 0.00% on 24 September 2026, while the deposit facility rate of the European Central Bank has been 2.50% since 16 September 2026. A CHF loan can stabilise the monthly budget, provided you have high professional stability in Switzerland.
3. How do you convert the down payment and monthly payments without losing capital?
To grant financing, French banks in practice ask for a down payment of at least 10% of the property price (covering notary and guarantee fees), ideally 20%.
If your savings are domiciled in Switzerland (CHF), you will need to transfer a large sum (e.g., CHF 100,000) to the French notary's account in euros. This transfer, and then each monthly transfer to pay your mortgage, weigh on the cost of your real estate project. Before validating the amount, it is worth checking the real CHF/EUR market rate to estimate the sum the notary will receive, before the exchange margin applied to the conversion.
The costly mistake: using your bank for currency exchange
If you let your Swiss or French bank manage the EUR/CHF conversion, you will suffer a hidden exchange margin (the bank “spread”) of around 1.5%. On a down payment of CHF 100,000, you instantly lose CHF 1,500 in real estate purchasing power.
By using a dedicated Swiss financial intermediary like ibani, you reduce the exchange cost of your purchase:
- Down payment conversion: Your funds are converted at the real interbank rate, plus a sliding margin of 0.40% to 0.15% depending on the amount, which increases the amount in euros received by the notary compared with a bank margin of around 1.5%.
- Monthly payments: each month, you convert the part of your salary you need and transfer it to your euro account to pay your mortgage, with no transfer fees charged by ibani and at the margin set out in the published fee schedule (0.40% for an amount under CHF 10,000).
Frequently asked questions (cross-border real estate)
Official sources
- Décision du 29 septembre 2021 relative aux conditions d'octroi de crédits immobiliers (French High Council for Financial Stability: 35% debt ratio, 25-year maturity), in French — Légifrance, accessed 29 September 2026
- Code de la consommation, art. L313-64: loans denominated in a currency other than the euro, in French — Légifrance, accessed 29 September 2026
- Monetary policy assessment of 24 September 2026 (policy rate held at 0%) — Swiss National Bank, accessed 30 September 2026
- Official ECB interest rates (deposit facility rate at 2.50% from 16 September 2026) — European Central Bank, accessed 30 September 2026