What are the deadlines for submitting a rent reduction?

The 3-point orientation

In Switzerland, a rent reduction must always be required as soon as possible. The request for a reduction must be received by the landlord before the start of the contractual or statutory notice period. If the landlord refuses or does not answer within 30 days, the tenant may submit a request for conciliation to the competent rental arbitration authority within a further 30 days.

The principle: The reduction does not apply immediately, but to the termination date

In Switzerland, a rent reduction does not simply take effect from the day on which the reference interest rate falls or the letter is sent to the landlord. The central point in time is the next ordinary termination date. This means that the tenants can demand a reduction in the net rent during the current tenancy, but in principle only on the date on which it could also be properly terminated.

This rule comes as a surprise to many tenant. Anyone who learns in March that the reference interest rate has fallen will not automatically receive the lower rent from April. The decisive factor is which termination dates are in the rental agreement and which period of notice applies. The deadline for apartments is often three months, but depending on the contract, canton or local appointment, the specific date may be different.

In practice, this means that the request for a reduction must reach the landlord in good time, before the start of the notice period. If it arrives too late, the rent reduction usually only takes effect on the following termination date. That is exactly why the calendar is almost as important as the calculation itself when it comes to subsidence requests.

The most important deadline: Submit before the start of the notice period

The central deadline is: The request for a reduction must be received by the landlord before the start of the relevant notice period. It is not the date of dispatch that is decisive, but access. If you send the letter the last day before the start of the deadline, you risk that it will arrive too late.

An example: You have an apartment with a three-month notice period and a next notice date of September 30. In that case, the request must always be received by the landlord before the start of this three-month period. If it only arrives after the start of the deadline, the reduction will no longer apply to September 30, but only to the next possible date.

A written request for a reduction, ideally by registered letter, is therefore particularly important. In this way, it is possible to prove later when the letter was received. The Canton of Lucerne expressly states that the request for a reduction must be received by the landlord before the start of the notice period; otherwise, the reduction only applies to the next possible termination date.

What are the cancellation dates?

The relevant termination dates are primarily based on the rental agreement. It may say, for example, that cancellations can be made at the end of any month, except at the end of December. Other contracts provide for fixed dates, such as the end of March, the end of June and the end of September. If there is no regulation, the statutory or local deadlines apply.

The rental agreement is therefore the first test point for the rent reduction due to the reference interest rate. Anyone who does not read the contract carefully can easily calculate the deadline incorrectly. Special dates may apply, particularly for older rental contracts, cooperative apartments, business premises or cantonal tenancies.

The Zurich courts clearly summarize the principle: During the term of the tenancy in accordance with Art. 270a OR, the tenant may demand that the rent be reduced to the next termination date if she has reason to believe that the rent has become abusive.

30-day response period: What happens after the application

After submitting the request for reduction, the tenant must wait for the landlord's response. In practice, the 30-day period is decisive. If the landlord rejects, only accepts a partial rent reduction or does not respond at all within 30 days, the tenant can take the next step.

This next step is to apply for conciliation to the competent conciliation authority. There is also a deadline here: Anyone who disagrees with the answer or does not receive an answer should act within 30 days. The Federal Housing Office points out that tenants can contact the competent conciliation authority within 30 days in the event of rejection, settlement or lack of response.

This second 30-day period is important because a reduction claim could otherwise be delayed. Anyone who waits for months after a rejection may have to make a new request and lose valuable time. tenant should therefore immediately note when the response period expires after the request has been sent.

What applies if there is no answer from the landlord?

If the landlord does not respond, this does not automatically mean approval. Silence does not replace a clear recognition of the rent reduction. Anyone who does not receive an answer after 30 days should therefore not simply pay less rent, but call the rent conciliation authority in due time.

This is particularly important because cutting rent on your own initiative can be dangerous. As long as the reduction is not agreed or decided, the previous rent remains owed in principle. Anyone who simply transfers less risks a late payment. Under certain circumstances, this can even trigger termination.

The right approach is therefore: submit requests in writing, document receipt, wait for a response deadline and, if silent, submit a request for conciliation in good time. In this way, the procedure remains clean, verifiable and secured under tenancy law.

Does a rent reduction apply retroactively?

A common question is whether the rent reduction can be demanded retroactively. In principle, the reduction does not automatically have a retroactive effect on the point in time at which the reference interest rate fell. It will normally only take effect on the next possible termination date if the request has been submitted in good time.

Anyone who misses the deadline usually cannot simply demand the reduction retroactively for the missed months. Instead, the start of the reduction is postponed until the next cancellation date. This can be financially noticeable, particularly if the reduction amounts to several percent of the net rent.

For tenant, this means that as soon as the mortgage reference interest rate falls or there is another reason for reduction, the review should be carried out quickly. The Federal Housing Office states that a reduction of 0.25 percentage points in the reference interest rate can in principle have the effect of a reduction claim of 2.91 percent.

All tenant must sign

If there are several tenants, another point is important: The request for a reduction should be signed by all contracting parties who are listed as tenant in the rental agreement. This applies, for example, to married couples, residential communities or jointly signed rental agreements.

If a signature is missing, the landlord may regard the request as incomplete or ask questions. As a result, valuable time can be lost. Especially when the deadline is tight, the letter should be completed, signed by hand and sent on time. Comparis also points out that the notice period should be taken into account when sending the request for a reduction and that all tenant listed in the rental agreement must sign.

Even with management companies, it is important to send to the correct address. The landlord or administration specified in the rental agreement or in the last official communication is decisive. If you are unsure, you can also send a copy to both addresses.

What must be included in the request for a reduction?

The request for a reduction must clearly show that the tenants are demanding a reduction in rent. It should state the current rental agreement, the apartment, the previous rent, the desired date and the reason for the reduction. The most common reason is a lower reference interest rate, but other changes may also be relevant.

A factual wording makes sense: The tenants demand a reduction in the net rent to the next possible termination date and asks for written confirmation within 30 days. Depending on the situation, a specific calculation can also be included.

It is important that the gross rent is not simply reduced. The calculation usually concerns the net rent. service charges, payments on payments and lump sums must be considered separately. Anyone who formulates imprecisely here risks misunderstandings.

What happens if the deadline is missed?

A missed deadline usually does not mean that the rent reduction is lost forever. However, it means that the reduction will only take effect later. That is precisely where the financial risk lies. If you miss the right appointment, you may pay too much rent for several months longer.

Example: The reduction would have been possible if submitted in good time by the end of September. If the application is too late, it will only take effect on the next termination date. Depending on the contract, this may be the end of October, the end of December, the end of March or even later. With high rents, this loss of time can amount to several hundred or a thousand francs.

A simple rule is therefore worthwhile: After any change in the reference interest rate, immediately check the rental agreement, calculate the notice period, prepare requests and deliver them on time. Anyone who is close should submit the letter in person against confirmation of receipt or choose a shipping method that proves receipt.

Special cases: index rent, tiered rent and business rent

Not every rental agreement works the same way. Special rules may apply to indexed rental agreements, tiered rents, subsidized apartments or business rents. A rent reduction due to the reference interest rate is not always immediately possible there or must be checked differently.

In the case of indexed tenancies, the rent is often linked to the national index of consumer prices. In the case of tiered rents, the future rent is contractually agreed in advance. For business premises, longer periods, other termination dates or special contract clauses may apply.

This does not mean that tenant can never demand a reduction. However, it means that the contract must be examined particularly carefully. Anyone who is uncertain should consult an advice center, the tenants' association or a specialist before deadlines expire.

Practical recommendation: Calculate deadlines backwards

The simplest method is to calculate backwards. First, you look for the next possible termination date in the rental agreement. The notice period is then deducted. The request for a reduction must be received by the landlord before this date.

For example, if the rental agreement provides for a three-month notice period at the end of March, the end of June and the end of September, the request for the end of September must be received before the start of the three-month period. If you are unsure, you should submit earlier. In practice, a request submitted too early is usually less problematic than a request submitted too late.

In addition, tenant should keep proof of shipping. Registered letter, confirmation of receipt, copy of the letter, date of delivery and response from the landlord belong in a clean rental file. These documents are important if conciliation proceedings become necessary later on.

Conclusion: The deadline determines the date of the reduction

The answer to the question What are the deadlines for submitting a rent reduction? states: The request must be submitted to the next termination date and reach the landlord before the start of the relevant notice period. Anyone who misses this deadline usually does not lose their claim for good, but postpone the start of the reduction.

There are further deadlines after dispatch. If the landlord refuses, accepts only partially or does not answer within 30 days, should the tenant call the competent conciliation authority within 30 days. Meanwhile, the previous rent should continue to be paid until an agreement or decision is reached.

For tenant, there is therefore one thing in particular that counts: check quickly, write correctly, deliver on time and document deadlines. Anyone who follows the formal steps properly significantly improves their chances of a successful rent reduction.

Glossary on deadlines for rent reduction

Request for reduction: Written request from tenants to reduce the rent to the next possible termination date.

Termination date: Date on which the tenancy could be properly terminated and by which the rent reduction is also required.

Notice period: period that must be met before the termination date. The request for a reduction must be received before the start of this period.

Reference interest rate: Official mortgage interest rate, which forms an important basis for rent adjustments.

Request for conciliation: Formal application to the rental arbitration authority if the landlord refuses, only partially agrees or does not answer.