SNB policy rate: impact on mortgages and your purchase project

Some decisions made in a meeting room in Bern reach your bank statement a few weeks later. The SNB policy rate is one of them. It feels abstract if you are not buying property; it becomes very concrete when you sign a mortgage. This guide explains how this monetary-policy tool works, why it changes and what it means for your property purchase in Switzerland.

What is the SNB policy rate?

The definition without unnecessary jargon

The Swiss National Bank policy rate (SNB) is the rate at which commercial banks — UBS, Raiffeisen, PostFinance and others — can deposit or borrow very short-term money with the SNB. In short, it is the floor reference for the price of money in the Swiss economy.

When the SNB lowers this rate, it makes credit cheaper for banks, which pass part of that advantage on to their clients. When it raises the rate, borrowing becomes more expensive — and this is reflected in the mortgage offers you receive.

How is it set in practice?

The policy rate is decided during the four quarterly monetary policy assessments held by the SNB each year, in March, June, September and December. At each meeting, the SNB Governing Board reviews indicators including:

• inflation forecasts over 2 to 3 years (the SNB aims for inflation between 0% and 2%);
• Swiss GDP growth and the health of the domestic economy;
• the Swiss franc exchange rate, as excessive appreciation weighs on exports;
• and the decisions of major foreign central banks — especially the US Fed and the European Central Bank.

This is not an exact science. It is a permanent trade-off between price stability, economic competitiveness and the value of the franc — a balancing act the SNB has been performing for more than a century.

How does the policy rate react to the global environment?

The Swiss franc as a safe-haven currency

Switzerland is an open, export-driven economy. Whenever the world becomes unsettled — financial crisis, pandemic, geopolitical conflict — investors rush into the Swiss franc, perceived as a safe haven. That demand strengthens the currency, makes exported products more expensive and weighs on competitiveness.

To limit this appreciation, the SNB can lower its policy rate, or even make it negative — as it did between 2015 and 2022, with a historical floor of -0.75%. The aim is to make the franc less attractive to foreign capital.

Dependence on ECB and Fed decisions

The SNB does not operate in a vacuum. If the European Central Bank (ECB) raises rates aggressively, capital can move towards the euro area, easing pressure on the franc. If the US Fed opts for low rates, global capital flows are redistributed differently.

A clear example: between 2022 and 2023, post-pandemic inflation pushed the SNB to raise its SNB policy rate to 1.75% — a level not seen for more than a decade. From March 2024, as inflation returned to levels compatible with price stability, it made six consecutive cuts and brought the rate back to 0% in June 2025.

An additional factor: US tariffs

In November 2025, Switzerland reached an agreement with Washington reducing additional US tariffs on Swiss products from 39% to 15%. This compromise slightly improved Swiss economic prospects and was one of the arguments for keeping the policy rate at 0% at the December 2025 assessment.

From policy rate to mortgage rate: the path of money

Two mortgage types, two transmission mechanisms

It is tempting to believe that the SNB mortgage rate follows directly and instantly from the policy rate. The reality is more nuanced — and understanding that nuance can save you several thousand francs.

The SARON mortgage (variable-rate mortgage) is indexed to the overnight money market rate. SARON tracks the SNB policy rate very closely. The rate you pay on a SARON mortgage is therefore the compounded SARON over the quarter plus a bank margin, generally between 0.70% and 1.20%. The SNB SARON rate therefore moves almost in real time with monetary-policy decisions.

The fixed-rate mortgage follows a different logic. Its rate is mainly determined by Swiss Confederation bond yields, i.e. long-term Swiss government borrowing. These depend on inflation expectations and global long-term rates. So even if the SNB policy rate remains at 0%, fixed rates may move because of geopolitical tensions, global inflation concerns or shifts in US bond markets.

The bank margin: the often overlooked component

Whether you choose a fixed-rate mortgage or a SARON mortgage, the bank adds its own commercial margin. This margin varies according to your risk profile (income, wealth, debt ratio), the loan-to-value ratio and your negotiating power. A mortgage broker who compares several lenders at the same time can obtain materially lower margins than a single-bank approach — a 0.20% to 0.40% difference on CHF 480’000.– over 10 years means several thousand francs.

Impact of a higher SNB policy rate on your mortgage

Transmission mechanism: what rises and what follows

When the Swiss National Bank raises its policy rate, the effect differs depending on the product:

• For the SARON mortgage, the increase is reflected in the following quarter when the rate is recalculated. If the policy rate rises from 0% to 0.75%, your SARON mortgage becomes more expensive accordingly.
• For an already concluded fixed-rate mortgage, your rate remains unchanged until maturity. At renewal, however, you will face the market conditions in force at that time.
• For future buyers, a higher SNB reference rate means less attractive mortgage offers and reduced borrowing capacity.

Impact on the property market

A higher SNB policy rate for real estate generally has a moderating effect on prices. Higher rates reduce buyers’ borrowing capacity, compress demand and can slow price growth — or even push prices down in overvalued segments. This is what was observed in 2022–2023 in some Swiss regional markets.

Use our mortgage calculator to simulate your mortgage loan.

Impact of a lower SNB policy rate on your mortgage

Lower monthly costs, but not automatically

Conversely, a lower SNB rate eases credit conditions. The SARON mortgage benefits immediately from a low-rate environment. A fixed-rate mortgage benefits through more competitive new offers when it is concluded or renewed.

In the property market, a low-rate environment stimulates buyer demand: monthly costs fall, borrowing capacity rises and properties that seemed out of reach become possible again. This phenomenon supports — and sometimes overheats — prices, as Switzerland experienced between 2015 and 2021 when the policy rate was negative.

Two quantified scenarios for a CHF 800’000.– property

To make these mechanisms concrete, here are two scenarios based on a property in Switzerland worth CHF 800’000.–, financed 60% by a mortgage (CHF 480’000.–) over 10 years, with no amortisation, acquisition costs estimated at 3% and annual maintenance costs of 1% of the property value.

Scenario A — higher SNB policy rate (mortgage rate at 3%)

Item	Value
Property price	CHF 800’000.–
Own funds (40%)	CHF 320’000.–
Mortgage amount (60%)	CHF 480’000.–
Acquisition costs (notary, transfer tax, etc.) — approx. 3%	CHF 24’000.–
Annual interest at 3%	CHF 14’400.–
Monthly interest	CHF 1’200.–
Annual maintenance costs (1% of market value)	CHF 8’000.–
Total annual cost (excluding amortisation)	CHF 22’400.–

In this higher SNB policy rate scenario, monthly interest costs reach CHF 1’200.–. This amount must be viewed against Swiss affordability requirements: to carry this mortgage comfortably, a gross annual income of CHF 130’000.– to CHF 150’000.– is generally required.

Scenario B — lower SNB policy rate (mortgage rate at 1.5%)

Item	Value
Property price	CHF 800’000.–
Own funds (40%)	CHF 320’000.–
Mortgage amount (60%)	CHF 480’000.–
Acquisition costs (notary, transfer tax, etc.) — approx. 3%	CHF 24’000.–
Annual interest at 1.5%	CHF 7’200.–
Monthly interest	CHF 600.–
Annual maintenance costs (1% of market value)	CHF 8’000.–
Total annual cost (excluding amortisation)	CHF 15’200.–

In this low-rate scenario, monthly interest falls to CHF 600.–, i.e. CHF 600.– less per month than in scenario A — or CHF 7’200.– in annual savings. Over a 10-year loan, that means CHF 72’000.– less in interest costs. The difference is substantial.

What to take away from these two scenarios

A 1.5 percentage-point difference on the interest rate of a CHF 480’000.– mortgage represents CHF 7’200.– per year. That is reason enough to compare offers, put lenders into competition and consult a mortgage broker whose role is precisely to optimise this parameter.

Fixed rate or SARON: what should you choose according to the market?

The logic behind each product

Choosing between a SARON mortgage and a fixed-rate mortgage is not a minor decision. It reflects your risk tolerance and your expectations for the SNB policy rate.

The SARON mortgage — successor to LIBOR, which was discontinued at the end of 2021 — offers a variable rate updated every quarter. In a low-rate environment or during rate cuts, it is generally cheaper than a fixed rate. Its drawback is uncertainty: if rates rise, your cost increases with little warning.

The fixed-rate mortgage provides predictability. You know your monthly cost for the next 5, 10 or 15 years. In exchange, you pay a security premium: the fixed rate is structurally higher than the short-term variable rate. But that premium has real value: it protects you from rising rates and makes your budget easier to plan.

Strategy in a zero-rate environment

For example, with a 0% policy rate and SARON at -0.05%, SARON mortgages are around 0.80%–1.20%, compared with 1.50%–2.05% for 10-year fixed rates. The gap is attractive for SARON. However, if institutions such as UBS, BCBE or Raiffeisen expect a slight increase in long rates, securing part of the financing at a fixed rate while combining both products can be sensible.

A mortgage broker can model these scenarios according to your personal situation and help you define the best split between SARON and fixed rate.

What the policy rate does not do on its own

Other factors affecting your mortgage rate

The SNB mortgage rate is not the only parameter behind the rate you will be offered. Several individual factors also matter:

• The loan-to-value ratio: the higher your own funds, the lower the bank’s risk and the better the terms. Below 65% external financing, you generally qualify for the best margins.
• Calculated affordability: Swiss banks apply a notional interest rate of 5% to check that your theoretical mortgage cost does not exceed one third of your gross income. This prudential rule applies regardless of actual market rates.
• Your overall solvency: income, fixed costs, existing debts and professional status (employee, self-employed, shareholder of an Ltd/SA) are analysed in detail.
• The property location: some cantons are perceived differently by banks in terms of real estate risk — Geneva, Zurich and Zug offer a different context from a peripheral region.

Why the advertised rate is never the final rate

Rates published on bank websites are indicative. The rate you actually obtain depends on negotiation. Some borrowers obtain terms 0.20% to 0.40% below the displayed scales simply because they create competition or appoint a specialist broker. On CHF 480’000.– over 10 years, that represents CHF 9’600.– to CHF 19’200.– in savings. Comparing costs nothing. Not comparing can cost a lot.

Practical advice and mistakes to avoid

The most common mistakes made by buyers in Switzerland

• Settling for a single bank offer. The first bank you contact has no objective reason to offer you its best terms immediately. At that stage, it is not competing with anyone.
• Confusing the policy rate with the mortgage rate. The policy rate is a monetary-policy signal. The rate you obtain also depends on the bank margin, long-term market conditions and your profile.
• Automatically choosing the variable rate because it is cheaper today. SARON is attractive in a low-rate period, but it exposes you to volatility. A 1.5-point increase can turn a good deal into a difficult burden.
• Forgetting ancillary costs. Transfer taxes, notary fees, land-registry fees and possible renovation works are added to the purchase price. Allow 3% to 5% of the price depending on the canton.
• Not anticipating the renewal. A fixed-rate mortgage maturing in a high-rate environment can create a significant budget shock. Planning the renewal 12 to 18 months in advance is a basic precaution.

Best practices

• Prepare your file (salary statements, tax documents, debt-enforcement extract) before starting any request.
• Request several offers at the same time through an independent mortgage broker, who has access to the whole market — banks, insurers and pension funds — and can negotiate on your behalf.
• Consider a tranche structure, for example one SARON tranche and one 10-year fixed tranche, to balance cost and security.
• Keep a safety buffer: a mortgage optimised on paper can become fragile if your professional situation changes.

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The role of the mortgage broker in this context

A mortgage broker does not merely forward files. In practice, the broker orchestrates structured competition among around thirty potential lenders: cantonal banks, major banks, foreign banks, life insurers, investment foundations and pension funds. Most private buyers would never think of — or have time to — contact these players individually.

In an environment where the SNB policy rate is 0% but market conditions change quickly, having an adviser who follows monetary news in real time and understands SNB signals is a tangible advantage. They can advise you on the best time to conclude or renew your mortgage, anticipate higher long-term rates and structure your financing to reduce upward revision risk.

Working with a professional mortgage broker is generally free for the borrower: the broker’s remuneration is paid by the selected lender. In other words, you receive expert support at no additional cost to your budget.

Would you like to assess your borrowing capacity or obtain compared mortgage offers? Our mortgage brokers in Switzerland analyse your file free of charge and propose the best market conditions according to your profile.

FAQ — SNB policy rate and mortgages in Switzerland

Disclaimer: The information in this article is provided for informational and educational purposes only. It does not constitute personalised financial, legal or tax advice. The rates and data mentioned are indicative and subject to change. Any real-estate financing decision should be reviewed individually by a qualified professional. The mortgage rates cited reflect observed market conditions and are not a promise or a rate guarantee.