2026 rental reference rate in Switzerland: Shared housing to counter the rise

In 2026, the Swiss property market presents a particularly paradoxical face that raises many questions for both tenants and landlords. On one hand, official announcements aim to be reassuring by maintaining the reference interest rate for rents, but on the other, the wallets of Swiss households continue to face constant pressure. At Roomlala, we see daily the challenges you face in finding decent housing without sacrificing your budget. The housing issue is central in Switzerland, and faced with what many consider a long-term crisis, it is crucial to understand the mechanisms at play. This article aims to decode the 2026 reference interest rate situation for you, explain why rents continue to climb, and, most importantly, show you how subletting a room or shared housing in Switzerland can become your best anti-inflation shield. Whether you are a tenant looking to reduce costs or a landlord wanting to optimise your space, we are here to help you navigate this complex context with confidence.

Understanding the 2026 reference interest rate and its impact

Stability at 1.25%: bittersweet news

The Federal Office for Housing (FOH) has recently confirmed the news: the 2026 reference interest rate for rents remains at 1.25%. This rate, which serves as a barometer for rent adjustments across Switzerland, is calculated based on the average interest rate of mortgage loans. For many tenants, this announcement came as a relief. Indeed, stability in this rate theoretically means that landlords have no legal grounds to impose a general rent increase on existing leases, at least not based on mortgage financing costs. It is a welcome guarantee of predictability in an often uncertain economic climate.

See also: British Columbia rental laws 2026: Why long-term renting is the future, Student housing shortage in Brussels in 2026: Homestays become essential for the start of the academic year and Taxation and room rentals in Switzerland: How to declare your rental income in 2026

However, at Roomlala, we would like to point out that this stability is bittersweet. While the reference interest rate does not move, that does not mean that the overall cost of living or housing-related expenses remain frozen. General inflation, although moderate, continues to impact maintenance fees, strata levies, and energy costs. Furthermore, landlords can still pass on a portion of inflation (up to 40%) or costs related to value-adding renovations to tenants, even with a stable reference rate. It is therefore essential to remain vigilant when receiving your statement of charges or any notification from your property manager.

Let us take a concrete example: Sarah, a tenant in Geneva since 2021, has seen her base rent stagnate thanks to the rate being maintained at 1.25%. However, her monthly charges have increased by 40 CHF due to rising energy prices and building maintenance costs. The stability of the reference interest rate protected her from a major increase, but it did not completely freeze her housing budget. This is where a fine understanding of the Swiss system becomes so important.

The FOH right to a rent reduction: are you affected?

This is an opportunity too often ignored by Swiss tenants: the famous FOH rent reduction. If the 2026 reference interest rate is 1.25%, it is entirely possible that your current rent is still calculated based on a higher previous rate, for example 1.5% or even 1.75%, depending on the date your lease was signed or your rent was last modified. If this is the case, the law allows you to demand a reduction in your rent proportional to this decrease in the reference interest rate.

How do you know if you are affected? At Roomlala, we advise you to check your lease agreement or the last rent-fixing letter sent by your landlord immediately. The reference interest rate on which your current rent is based must be mentioned there. If this figure is higher than 1.25%, you have the right to act. Be careful, however: a reduction is never automatic in Switzerland; it is up to the tenant to actively request it. If you do not come forward, your rent will remain unchanged and you will lose money every month.

To assert your right, the procedure is strict but accessible. Here are the steps to follow:

• Draft a formal letter: Request the rent reduction by citing the decrease in the reference interest rate.
• Respect the deadlines: The request must reach the landlord by registered mail before the start of your lease's notice period (generally 3 months before the termination date).
• Analyse the response: The landlord has 30 days to respond. They may accept, refuse, or partially offset the reduction by citing inflation or rising maintenance costs. In the event of a dispute, your canton's conciliation authority is there to help you.

Why are rents continuing to rise in Switzerland?

Housing shortage and inflation: the losing duo

While the 2026 reference interest rate protects existing leases, it cannot do anything against the raw reality of the property market. Despite this stable rate of 1.25%, rents offered on the market continue to rise significantly. Expert forecasts, particularly those from UBS, suggest rent increases of around +1.5% per year in 2026 and 2027. But how can this phenomenon be explained? The answer lies in two words: shortage and inflation. At Roomlala, we see that the demand for affordable housing has never been stronger, while the supply is stagnating dangerously.

Switzerland is facing a structural housing shortage. The national vacancy rate is hovering dangerously around the critical 1% mark, and it is even well below that in highly sought-after urban centres like Zurich, Geneva, Lausanne, or Zug. New housing construction is struggling to keep up with population growth and changing lifestyles (an increase in single-person households). This scarcity gives landlords a considerable advantage in the open market. When an apartment becomes available, the queue to view it is endless, which naturally pushes prices upwards.

Added to this shortage is inflation in construction costs. Materials cost more, and environmental standards (though necessary) add to the bill for new builds and major renovations. Institutional investors and private landlords logically pass these costs on to market rents. It is this losing duo that makes finding a new home so anxiety-inducing for many Swiss households in 2026, often forcing them to move away from city centres or to lower their requirements.

Existing leases vs. new leases: watch out for confusion

To navigate this context well, it is vital not to confuse the evolution of rents for existing leases with that of new leases on the market. This is a fundamental distinction in Swiss tenancy law that we take the time to explain to our Roomlala community. On one hand, the market for existing leases is a regulated and protected market. As long as you remain in your home, your rent is linked to the FOH 2026 reference interest rate and inflation. Your landlord cannot increase your rent simply because the neighbour pays more.

On the other hand, the market for new leases feels the full force of the law of supply and demand. When a tenant moves out, the landlord has the opportunity to adjust the rent to current market conditions for the next tenant. Although Swiss law prohibits abusive returns, the lack of transparency and the pressure of the shortage mean that rents often take a spectacular leap when a tenant changes. This is why moving in 2026 is expensive—very expensive.

Let us take the use case of Thomas, who has lived in a 3-room flat in Lausanne for 10 years for 1,600 CHF per month. If he decides to move to an equivalent apartment in the same area, he will discover that new leases for this type of property are now being negotiated at around 2,200 CHF. This massive difference creates a blockage: tenants no longer dare to move, which further exacerbates the shortage of available housing. Faced with this impasse, finding alternatives to lighten the financial burden without losing one's current home becomes an absolute necessity.

Subletting a room in Switzerland: an anti-inflation shield

Sharing costs to preserve purchasing power

Faced with this rise in Swiss rents on the open market and the increase in the cost of living, shared housing and subletting a room are emerging as sensible solutions. At Roomlala, we firmly believe that home-sharing is the best anti-inflation shield available in 2026. If you have an unoccupied room (following a child moving out, a separation, or simply because your apartment is large), subletting a room in Switzerland allows you to drastically split your expenses.

The financial benefit is immediate and tangible. By subletting a room, you do not just share the base rent, but also the additional costs: electricity, internet subscription, Serafe fees, and sometimes even groceries or cleaning products. For a main tenant struggling to make ends meet, receiving, for example, 600 or 800 CHF per month for a room is equivalent to a significant increase in their net purchasing power, without having to ask for a salary raise or take on two jobs.

Beyond the financial aspect, shared housing provides an invaluable human dimension. In a society where many people face isolation, sharing your daily life with a student, a young professional, or a cross-border worker creates social ties, mutual aid, and conviviality. It is a win-win approach: the subtenant gains access to affordable, furnished housing in a tight market, and the main tenant secures their budget while keeping their apartment protected by the reference interest rate.

New rules for subletting since 2024

While subletting a room remains perfectly legal in Switzerland according to Article 262 of the Code of Obligations, it is imperative to highlight that the legal framework has tightened. Following the federal vote in November 2024 on tenancy law, new rules have come into force, and they apply fully in 2026. At Roomlala, safety and legality are our priorities, which is why we detail these crucial changes to help you avoid any disputes with your property manager or landlord.

The major change concerns the formal procedure. Previously, an oral or tacit agreement could sometimes suffice, although it was discouraged. Today, the law requires that the tenant's request to sublet a room must be formulated in writing. Likewise, the landlord's agreement must mandatorily be given in writing. Without this precious document, you expose yourself to the early termination of your lease. You must communicate to your landlord the name of the subtenant, the terms of the subletting (rent amount), and the use of the room.

Another important limitation introduced by the 2024 vote concerns the duration. Henceforth, the landlord has the right to refuse subletting if the intended duration exceeds two years. This measure was designed to prevent tenants from becoming quasi-permanent landlords. Furthermore, the golden rule remains unchanged: the strict prohibition on making an abusive profit. You cannot charge the subtenant a disproportionate amount. The rent requested must correspond to the occupied surface area, plus a reasonable supplement (generally 10 to 20%) for wear and tear of furniture if the room is furnished, and a fair share of common charges.

Shared housing and homestays: best practices with Roomlala

Now that you have mastered the legal framework and financial stakes of the 2026 reference interest rate, how can you proceed with peace of mind? At Roomlala, we have designed our platform to facilitate every step of homestays and shared housing in Switzerland. The first step is to create a transparent and attractive listing. Detail precisely what is included in the rent (Wi-Fi, access to the washing machine, shared spaces) and set a fair price, calculated scrupulously according to the non-profit rules mentioned earlier.

Choosing a flatmate or subtenant is a delicate step. We advise you to prioritise communication and to clearly define your expectations regarding lifestyle (cleaning, noise, visitors) before any signing. Our secure messaging system allows you to exchange with candidates in detail, verify their profiles, and plan a meeting or a video call. Do not hesitate to ask for standard guarantees (proof of income, extract from the Debt Collection Office) to ensure your future flatmate's solvency, just as a property management agency would.

Finally, formalising the agreement is essential. Even if you are hosting someone via Roomlala, we strongly recommend signing a written sublease agreement in due form. This document will protect both parties by setting out in black and white the duration, the amount of rent, the notice period (usually one month for a furnished room), and the rules of shared living. By following these best practices, informing your landlord in writing, and using a trusted platform like ours, you will turn the housing crisis into an enriching financial and human opportunity.