Financing a property purchase in Switzerland: the full picture

The question usually arises after a viewing, sometimes after the second one. The property appeals, the neighbourhood feels right, and you begin doing mental arithmetic. Then comes the inevitable: "But can we actually finance this?" Property financing in Switzerland rests on precise rules, well known to banks and brokers, yet rarely explained clearly to someone buying for the first or second time. This chronicle sets out the overall framework — what the bank examines, what it requires, and what you can prepare before you even begin viewing.

The two pillars of financing

In Switzerland, every mortgage rests on two simultaneous equilibria: the ratio between the loan and the value of the property, and the ratio between the cost of the loan and your income. These two criteria are independent of each other. You may satisfy one and fall short on the other. A bank requires both.

The first equilibrium concerns equity. The general rule is that you contribute at least 20% of the purchase price from your own funds. This threshold is not arbitrary: it protects the lender in the event of a fall in the property's value, and it protects you from indebtedness that would exceed the net value of your assets. On a flat priced at CHF 850,000, that means CHF 170,000 to assemble before signing.

The second equilibrium concerns affordability. The bank does not use the current market rate to assess whether you can repay. It applies a theoretical rate, generally around 5%, to which it adds an estimate of maintenance costs and the mandatory annual amortisation. All these charges must not, as a general rule, exceed one third of your gross income. This is what professionals call the affordability calculation, and it is often where surprises arise.

Where the 20% comes from

The equity accepted by banks is not limited to savings held in an account. It may come from several sources, though not all carry equal weight in the eyes of lenders.

• Private savings: a bank account, savings account, or liquid assets. The simplest source to document.
• Pillar 3a: a tied life insurance policy or pillar 3a pension account may be pledged or withdrawn for the purchase of a primary residence, subject to certain conditions.
• The second pillar (occupational pension): you may withdraw or pledge part of your pension fund assets. One rule is firm, however: at least 10% of the equity must come from sources other than the second pillar. This limit is imposed to preserve a minimum level of retirement coverage.
• A gift or anticipated inheritance: accepted by most banks, provided it is documented and irrevocable.
• The value of an existing property: if you already own property, its net value may serve as additional security.

The chronicle Equity: 20%, and where it can come from details each source with its own rules — well worth reading if you are in the process of assembling your initial contribution.

What the bank actually calculates

Consider a typical case. A couple has combined gross income of CHF 180,000 per year. They wish to buy a house at CHF 1,100,000. They contribute CHF 220,000 in equity, which is exactly 20%. The bank will therefore finance CHF 880,000.

At a theoretical rate of 5%, the annual interest amounts to CHF 44,000. The second-rank mortgage — the tranche above 65% of the property's value — must be amortised within fifteen years at most, which adds an indicative annual charge. Maintenance costs are estimated at a flat rate, often 1% of the property's value. Adding these three items together, the total theoretical affordability cost can exceed CHF 60,000 per year. One third of CHF 180,000 is CHF 60,000. The couple is right at the limit, and the bank may decline if one of the incomes is variable, if employment is recent, or if other debts exist.

This calculation illustrates why buying capacity cannot be read directly from a property's asking price. You can estimate your buying capacity to get an initial sense of the amount that banking rules allow you to borrow given your situation.

First and second rank: the structure of the loan

A Swiss mortgage is often structured in two tranches. The first rank covers up to 65% of the property's value: this is the portion the bank considers most secure, and it does not require amortisation. The second rank covers the tranche between 65% and 80%: this is the portion you must repay, as a general rule, within fifteen years at most.

This distinction has practical consequences. The faster you repay the second rank, the more you reduce your charges and regain financial flexibility. Some buyers choose to amortise directly; others use pillar 3a as indirect amortisation — annual contributions build up the pension fund, which is then pledged. Each approach has its own tax advantages, and the right answer depends on your personal situation, your canton of residence, and the expected trajectory of your income.

Preparing your financing before viewing

The French-speaking Swiss market is competitive. When a property matches what several buyers are looking for, the time between a viewing and the seller's decision can be short. Arriving without confirmed financing means arriving without any real power to act.

This is why the Buyer Passport exists: before the first viewing, Alexandre verifies on the basis of your documents that your financing capacity is genuine, consistent with the market segment you are targeting, and properly documented. It is not an online simulation — it is a file-based verification that allows you to act with clarity when the right property appears.

Property financing in Switzerland is not opaque, but it does require assembling several pieces in the right order. The bank, the broker, and the notary each play a distinct role. Understanding the general framework — the 20% equity requirement, the affordability calculation at the theoretical rate, the two-rank structure — allows you to approach those conversations with the right people without being caught off guard.

Financing does not begin when you find the property: it begins when you decide to search in earnest.

Your situation is rarely identical to the typical case. The composition of your equity, the stability of your income, the nature of your employment contract, self-employed activity — each of these factors influences what a bank will accept and on what terms. If you would like to understand precisely where you stand before you start viewing, or if you are uncertain about how to assemble your initial contribution, this is exactly the moment to discuss it with Alexandre.