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Swiss rent calculator: Am I entitled to a rent reduction?
The result will appear here as soon as you calculate. It shows the savings per month and per year, as well as all deductions listed individually.
The calculator compares the reference interest rate in your tenancy agreement with the current rate set by the Federal Office for Housing and takes into account inflation and cost increases. The result is a non-binding initial estimate.
How the rent calculator works
Enter the net rent excluding service charges.
Select the month and year of the last rent assessment, i.e. the start of the tenancy or the last rent adjustment.
Select the reference interest rate from the contract or have it calculated automatically.
Check the result and, if you are eligible, use the ‘Rent Reduction’ service.
The current mortgage reference rate is 1.25 per cent (in force since 02.09.2026). For every quarter of a per cent reduction since your last rent review, this results in a calculated entitlement of 2.91 per cent, less 40 per cent for inflation and a flat-rate allowance for increased costs.
From the result to the letter to the administration
With the ‘Rent Reduction’ service, you can create your request for a rent reduction online. We print, envelope and post the letter via ‘A-Post Plus’ or registered post to your landlord.
Frequently Asked Questions
The calculator uses the relative method: for every quarter of a per cent by which the reference interest rate has fallen since the last rent was set, there is a reduction of 2.91 per cent. From this, we deduct 40 per cent of inflation (the national consumer price index) and a flat-rate cost increase of 0.5 per cent per year.
The current reference mortgage interest rate is published quarterly by the Federal Office for Housing (BWO). The calculator always displays the rate valid as of today’s date.
No. If the sentence is not included in the tenancy agreement or the most recent rent notice, the calculator automatically determines it based on the month in which the rent was last set.
No. The result is a non-binding initial estimate. Landlords may claim individual cost increases, value-enhancing investments or local and neighbourhood market rates. The calculator does not replace a case-by-case assessment.
With our Rent Reduction Service, you can create your request for a rent reduction online. AboQuit prints it and sends it via A-Post Plus or registered post to your landlord.
More on the topic of rent
- Swiss reference interest rateCurrent mortgage reference interest rate in Switzerland (BWO), history since 2008 and the rent reduction per quarter percentage point. With free calculator.
- Apply for a rent reductionApplying for a rent reduction in Switzerland: written request, deadlines, termination date and typical grounds for refusal under Art. 270a CO.
- Inflation (LIK) and cost increasesWhy landlords may deduct 40% of inflation (LIK) and a flat-rate allowance for cost increases: clearly explained, with a sample calculation and a free calculator.