Affordability Calculator Switzerland
Understanding mortgage affordability—known in Switzerland as Tragbarkeit—is one of the most important steps when buying a home. Swiss banks apply strict affordability rules designed to ensure long-term financial stability for borrowers. An Affordability Calculator helps you estimate whether you meet these requirements and what purchase price fits your financial situation (affordability Calculator Switzerland).
Tragbarkeit is based on the idea that your housing costs should remain manageable even if interest rates rise. While Switzerland currently benefits from relatively low mortgage rates, banks calculate affordability using a much higher theoretical interest rate (typically around 5%). This protects homeowners from financial shocks and ensures lenders that you can comfortably sustain the mortgage in the long run.
An Affordability Calculator considers three key cost components: interest, amortization, and maintenance. When added together, these costs must not exceed one-third (33%) of your gross annual income. This is known as the 33% rule. The theoretical interest rate is applied to the full mortgage amount, not the amount you actually pay at today’s market rates. In addition, Swiss lenders require that part of the mortgage is amortized regularly until it reaches two-thirds of the property value. This amortization, along with a 1% allowance for maintenance and ancillary costs, is included in the affordability test.
To determine how much you can borrow, the Affordability Calculator first assesses your income sources, such as salary, bonuses, self-employment income, rental income, or pension income. Next, it accounts for your equity contribution, which must be at least 20% of the property value. Of this, a minimum of 10% must be cash (not from your pension funds). Up to 10% may come from Pillar 2 pension funds. A higher equity contribution improves your affordability and may also give you access to better mortgage conditions.
Another factor included in the calculator is the loan-to-value ratio (LTV). Most residential mortgages in Switzerland allow borrowing up to 80% of the property value. If you choose a lower LTV—such as 60%—your affordability improves further because your theoretical interest and amortization obligations decrease.
With this information, the Affordability Calculator estimates the maximum purchase price you can afford. It also helps you understand how lenders view your financial profile. This can prevent surprises during the mortgage approval process and allows you to focus on properties truly within your range.
Using an Affordability Calculator early in the home-buying process helps you clarify your budget, adjust your equity strategy, and compare financing options across lenders. It’s a valuable tool that supports smarter planning and increases your chances of securing the best mortgage offer. Whether you’re buying your first home or upgrading to a larger property, understanding Tragbarkeit is essential—and a reliable calculator makes the process simpler, clearer, and more predictable.
