2026 Swiss reference rate: What impact on the rent for your shared housing?

Are you renting a room or sharing an apartment in Switzerland and wondering if you are paying a fair price? With inflation and the cost of living, every franc counts. On September 1, 2026, the Federal Housing Office (FHO) published its latest data regarding the 2026 Swiss reference interest rate. At Roomlala, we know that real estate jargon, between mortgage rates and termination deadlines, can seem complex. That is why we are decoding the impact of this announcement on your housing budget for you. Whether you are a primary tenant or a subtenant, discover how to exercise your rights to perhaps obtain a rent reduction by the end of the year.

Understanding the 2026 Swiss reference interest rate and its implications

The FHO announcement for autumn 2026: holding steady at 1.25%

On September 1, 2026, the Federal Housing Office (FHO) delivered its highly anticipated verdict for the autumn. The 2026 Swiss reference interest rate is officially maintained at 1.25%. This figure, which is essential in the Swiss real estate landscape, determines the legal basis on which landlords calculate rents. Concretely, this rate has remained unchanged since its last decrease a year earlier, on September 2, 2025.

Read also: Rising rental costs in Switzerland (Winter 2026): Renting a room to balance your budget, Student housing shortage in Belgium in 2026: Homestays as a supportive alternative and Youth Rent Subsidy fall 2026: How to finance your shared housing in Spain

Why this stagnation? Financial experts, including those at UBS, point out that the average mortgage rate is currently stagnating around 1.31%. However, the reference rate is only adjusted when this average rate crosses certain strict thresholds, calculated at the quarter-point. Thus, for this autumn 2026, the FHO did not have sufficient mathematical grounds to change the 1.25% rate.

While this announcement means there is no new entitlement to a reduction compared to the previous quarter, it does not freeze the situation for all tenants. On the contrary, it acts as a crucial wake-up call. At Roomlala, we often find that many people are still unaware of the current market state and continue to pay rents based on obsolete rates.

It is therefore essential to check your lease agreement. If the signing date was several years ago (before 2025), there is a strong chance that your rent is still calculated based on a higher rate. In this case, maintaining the current rate at a historically low level is an excellent opportunity to act and rebalance your monthly budget.

Why many tenants are still entitled to a reduction

Although the rate did not decrease this autumn, this absolutely does not mean that your rent cannot decrease. In fact, regarding ASLOCA rent reduction requests (the Swiss Tenants' Association), legal experts regularly remind us that thousands of tenants have not yet exercised their rights since the rate was lowered to 1.25% in 2025.

If your current lease is still based on an old mortgage rate of 1.5%, 1.75%, or more, you are entitled to demand a rent reduction. The gap between the rate stipulated in your initial contract (or at the time of the last rent adjustment) and the current 1.25% rate legally justifies an adjustment downward for your monthly payments.

Let’s take a concrete example. Imagine you are renting an apartment in Geneva for 2,000 CHF per month, with a lease based on a 1.5% rate. According to the rules in force, a quarter-point drop (from 1.5% to 1.25%) entitles you to a rent reduction of approximately 2.91%. This represents a saving of nearly 60 CHF per month, or more than 700 CHF per year. A significant amount for your purchasing power!

We strongly advise you to take your rental agreement out of your files and check the clause regarding the reference rate. If you find a rate higher than 1.25%, it is high time to take action. Do not wait for your landlord or property management company to do it for you, as this process is almost never proactive on their part.

What is the impact on shared housing in Switzerland or long-term room rentals in Switzerland?

Swiss tenant rights also apply to subtenants

It is common to think that only those who have signed a primary lease directly with a property management company or a landlord have rights. This is a misconception! Swiss tenant rights are designed to protect all stakeholders, including in the context of shared housing in Switzerland or subletting.

At Roomlala, we support people who rent a homestay daily. If you are renting a long-term room in Switzerland as a subtenant, you have the right to request a rent reduction from your primary tenant, in exactly the same way the latter can do so with their landlord.

Of course, this implies that the primary tenant has themselves benefited from a rent reduction (or is entitled to one based on their own lease). The Swiss Code of Obligations prohibits the primary tenant from making an abusive profit at the expense of their subtenants. If their costs decrease thanks to the 1.25% rate, they are required to pass this reduction on proportionally to the portion of the rent you pay for your room.

For example, if you share a 4-room apartment in Lausanne, you rent one of the rooms, and the overall rent for the apartment drops by 100 CHF following a rate review, your portion of the rent should drop proportionally (for example, by 25 CHF or 33 CHF depending on the initial split). Transparent communication between roommates is key to ensuring that everyone gets a fair deal and that the shared housing remains healthy.

Exceptions to the rule: when a reduction is not possible

Although the legislation is very favorable to tenants, there are notable exceptions. Not all rental contracts are linked to the mortgage reference rate. It is therefore essential to correctly qualify the nature of your contract before starting any process with your landlord.

Here are the main exceptions for which the reduction linked to the reference rate does not apply:

• Index-linked leases: If your contract stipulates that your rent evolves exclusively based on the Swiss Consumer Price Index (CPI), mortgage rate variations do not apply to you.
• Step-up leases: In this type of contract, rent increases are fixed in advance for specific periods. During the term of the step-up, you cannot request a rent reduction.
• Subsidized housing: Rents for housing supported by the state or cantons follow specific calculation rules based on actual costs.

If you are not in any of these exceptional situations, the way is clear to assert your rights to a reduction. If you are in doubt about the nature of your lease, do not hesitate to seek advice from a local ASLOCA branch or to verify the exact terms written on your sublease contract.

How to formulate your ASLOCA rent reduction request and assert your rights?

Practical steps and deadlines to respect

As we have highlighted in our points of caution, rent adjustment is never automatic. It is up to you, as a tenant or subtenant, to take the initiative. To formulate an ASLOCA rent reduction request in due form, it is recommended to proceed formally, by way of a registered letter sent to your landlord or primary tenant.

Timing is absolutely crucial. For your request to be valid, it must reach the landlord before the beginning of the next termination period of your lease. In Switzerland, termination periods are generally three months before the end of a quarter, or by deadlines established by local customs (often the end of March, June, and September).

For example, if your lease provides for a possible termination on December 31 with three months' notice, your registered letter must reach your landlord by September 30 at the latest. If you miss this deadline by even one day, the rent reduction will only be effective at the next deadline, i.e., three months later. You would thus lose several months of potential savings.

In your letter, you must clearly mention the current reference rate on which your lease is based, the new 2026 Swiss reference rate (1.25%), and formally request the corresponding reduction. The FHO and ASLOCA provide free letter templates on their respective websites to ensure you do not miss any mandatory legal mentions.

Practical case: calculating and requesting your rent reduction

To help you see things more clearly, let’s do a calculation together. We know that for a 0.25-point drop in the reference rate (going, for example, from 1.5% to 1.25%), the tenant is entitled to a 2.91% rent reduction. If the rate drops from 1.75% to 1.25% (a 0.5-point drop), the theoretical reduction climbs to 5.71%.

However, be careful: the landlord has the right to compensate for this reduction by claiming inflation (up to 40% of the increase in the Consumer Price Index) or a justified increase in maintenance costs since the last rent fixation. It is therefore very common that the reduction finally granted is slightly lower than the theoretical percentage.

Let’s take the case of Sophie, who rents a long-term room in Switzerland in Fribourg. Her sublease indicates a rent of 800 CHF, based on an old rate of 1.75%. She writes to her primary tenant at the beginning of September 2026 to request a reduction. The theoretical reduction is 5.71%, or about 45 CHF. The primary tenant accepts the reduction but justifies retaining 10 CHF to compensate for general inflation. Sophie still gets a net reduction of 35 CHF per month, or 420 CHF in annual savings.

If the landlord or primary tenant refuses your request, or does not respond within 30 days, you have the possibility of seizing the conciliation authority for leases and rents in your canton. This process is free in Switzerland and very often allows finding an amicable agreement without having to go through a heavy procedure.

Shared housing and subletting in Switzerland: advice from Roomlala

At Roomlala, our mission is to facilitate the connection between hosts and tenants in a secure, human, and transparent framework. The question of the fair price is central to ensuring harmonious cohabitation over the long term. The regular announcements linked to the 2026 Swiss reference interest rate are an excellent opportunity to reset the finances of your shared housing and ensure that everyone is paying the right price.

We always encourage primary tenants who sublet a room on our platform to be proactive and honest. If you obtain a rent reduction from your property management company, spontaneously inform your subtenants and adjust their rent. This good-faith approach reinforces trust, retains your roommates, and guarantees a serene atmosphere within your home.

For tenants and subtenants, we remind you of the crucial importance of keeping all your contractual documents. A clear and precise written lease is your best asset to assert your rights. When signing a contract for a long-term room in Switzerland, always ensure that the mortgage reference rate in force on the date of signing is explicitly indicated.

Finally, do not forget that real estate legislation evolves. Stay informed by regularly consulting FHO communications and advice from tenant advocacy associations. At Roomlala, we ensure that our community has the best information to rent and host with complete peace of mind. Do not hesitate to browse our other articles to learn everything about your rights, your duties, and our tips for successful shared living!