Swiss Mortgage Affordability Stress-Test Calculator
Calculate your Swiss property borrowing capacity using standard bank stress-testing formulas.
Swiss Mortgage Affordability Calculator
Calculate Swiss mortgage Tragbarkeit (affordability ratio) using the regulatory 5% stress-test interest rate, required down payment, and annual carrying costs rule.
🏡 Property & Income Details
FINMA minimum: 5%
Annual Housing Cost Breakdown (Stress Test)
Swiss Mortgage Tragbarkeit Rules Explained (2026)
Swiss banks are among the most conservative mortgage lenders in the world. FINMA regulations require all Swiss mortgage applicants to pass a stress-test affordability check, ensuring they can still afford their home if interest rates rise to 5%.
Swiss Mortgage Eligibility Requirements (2026)
| Requirement | Rule | 2026 Standard |
|---|---|---|
| Minimum Down Payment | Own funds (Eigenkapital) | ≥ 20% of property value |
| Tragbarkeit (Affordability) | Annual housing costs / Gross income | ≤ 33% (1/3 rule) |
| Stress-Test Rate | Minimum interest rate for calculations | 5.0% (FINMA minimum) |
| Maximum LTV | Loan-to-Value ratio | ≤ 80% of purchase price |
What is the Swiss Tragbarkeit rule?
Tragbarkeit (literally 'bearability') is Switzerland's mortgage affordability metric. Banks require that the combined annual mortgage costs — including interest calculated at the 5% stress rate, amortization, and 1% maintenance — do not exceed 33% (one-third) of the borrower's gross annual income.
How much down payment is required for a Swiss mortgage?
Swiss FINMA regulations require a minimum 20% down payment (Eigenkapital). However, at least 10% must come from liquid own funds (cash savings, Pillar 3a, inheritance) — NOT from Pillar 2 BVG pension capital. The remaining 10% can come from BVG capital, a Pillar 3a pledge, or parental guarantees.
How does the Swiss amortization requirement work?
Swiss mortgage regulations require that mortgages above 65% LTV (Loan-to-Value) be amortized down to 65% within 15 years or by retirement age, whichever comes first. This mandatory amortization is included in the Tragbarkeit calculation.
Educational Purpose Disclaimer
This calculator is provided for informational and educational estimation purposes only. All calculations and projections are based on standard mathematical formulas and assumed inputs. The output values should not be considered professional financial, legal, tax, or medical advice. ProCalc is not a registered financial advisor or licensed practitioner. Always consult a qualified professional (such as a Chartered Accountant, certified planner, or physician) before making major decisions.
What is the Swiss Mortgage Affordability Stress-Test Calculator?
The Swiss Mortgage Affordability Stress-Test Calculator is a comprehensive tool designed to help homebuyers and expats evaluate their borrowing capacity for Swiss real estate according to strict local bank lending guidelines.
Buying a home in Switzerland involves a rigorous financial check known as Tragbarkeit (affordability). Unlike in other countries where banks lend based on current market interest rates, Swiss banks use a theoretical stress interest rate of 5.0% to stress-test your financial position. This safety buffer ensures that you can still afford your mortgage even if interest rates rise significantly.
To qualify for a Swiss mortgage, the total annual stress-tested costs of owning the property must not exceed 33% (one-third) of your gross annual household income. These stress costs include:
• Imputed Interest: Calculated at a theoretical 5% of the total loan amount.
• Mandatory Amortization: If your loan-to-value (LTV) ratio is above 67% (known as the second mortgage), you are legally required to amortize the excess debt down to 67% within 15 years or by retirement age, whichever comes first.
• Maintenance & Utilities: Standardized by banks at 1% of the property purchase price annually.
Additionally, you must provide a minimum down payment of 20% of the property purchase price. Under Swiss regulations, at least 10% of the property value must come from "hard equity" (such as cash savings, pillar 3a accounts, or life insurance policies), while the remaining 10% can be sourced from your occupational pension fund (Pillar 2) withdrawals or pledges.
This stress-test simulator models your LTV, calculates the exact minimum gross income required by Swiss banks, and projects your real-world monthly costs under current market interest rates.
How Does the Swiss Mortgage Affordability Stress-Test Calculator Work?
1. Input Property Price and Down Payment. 2. Input Gross Annual Household Income. 3. Configure Stress and Real Interest Rates. 4. View eligibility, LTV, required income, and real monthly costs.
Formula & Calculation Method
Total annual stress costs (5% imputed interest + amortization of loan part above 67% over 15 years + 1% maintenance) must not exceed 33% of gross income. Downpayment must be at least 20%.
Example Calculation
Property CHF 1M, Downpayment CHF 200k, Gross income CHF 150k. Loan = CHF 800k (LTV 80%). Imputed costs = 800k * 5% + (800k - 670k)/15 + 1M * 1% = 40k + 8.6k + 10k = CHF 58,667. Ratio = 39.1% (fails stress test). Required income = CHF 177,778.
Frequently Asked Questions
Total annual stress costs (5% imputed interest + amortization of loan part above 67% over 15 years + 1% maintenance) must not exceed 33% of gross income. Downpayment must be at least 20%.
Disclaimer: This tool is provided for informational and calculation purposes. Output values are estimates based on standard user inputs.