Understanding Swiss Mortgage Affordability
Buying a home in Switzerland requires navigating strict lending regulations. Unlike other countries where mortgages are approved based on current market interest rates, Swiss banks use a notional stress interest rate (usually 5.0%) to calculate whether you can afford the property over the long term.
This regulation is known as Tragbarkeit (affordability).
The 33% Stress-Test Rule
The core rule of Swiss mortgage lending is that the total theoretical running costs of your home must not exceed 33% (one-third) of your gross household income.
These theoretical running costs include:
- Imputed Interest: 5.0% of the total loan amount.
- Amortization: If your loan-to-value (LTV) exceeds 67% (meaning you put down less than 33% equity), you must amortize the second mortgage portion down to 67% within 15 years.
- Maintenance & Utilities: Estimated at 1.0% of the property purchase price annually.
Action Plan: Prepare Your Application
- Secure the 20% Down Payment: At least 10% of the property value must come from cash, shares, or third pillar funds, and cannot come from your second-pillar occupational pension.
- Test Your Income: Use our Swiss Mortgage Affordability Stress-Test Calculator to check if your salary satisfies the bank's strict stress requirements before making a formal purchase offer.
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