SWISS TENANCY LAW · FREE FIRST CHECK

Reduce your rent? Check your lease for free.

Upload your lease. We check free of charge and without obligation whether your rent can be reduced.

  • Free
  • No obligation
  • Swiss tenancy law
  • Deleted after 30 days
Check lease for free
PDF or photo · up to 10 MB per file
Drop files here
or
Lease, photo or letter from your landlord or property manager · multiple files allowed

Key contract details are detected automatically.

Check is free – you decide what happens next.

No lease available?
Enter details manually Privacy-friendly – no upload needed. Approx. 3 minutes.
30-day standard deletion Swiss Post registered mail
01 - How it works

How the rent-reduction check works

No knowledge of tenancy law required. Upload your lease, see whether a reduction is possible, and decide on the next step yourself.

01
Upload
Upload your lease or most recent adjustment letter as a PDF or phone photo.
Mietvertrag.pdf
02
Analyse
We extract the net rent, ancillary costs, contract start date and verify the stored Swiss reference interest rate.
FIELD VALUE Net rent CHF 2'780 Ancillary costs CHF 280 Ref. rate 1.75%
03
Send request
See your potential rent reduction. If you wish, we create the rent-reduction request and send it to your landlord or property manager by registered mail via Swiss Post – including tracking and 12-month rent monitoring.
SAVINGS POTENTIAL CHF 162 / month · CHF 1'944 / year
02 - Result

A concrete figure. Not four pages of legal text.

This is what the analysis looks like after uploading – sample data.

Confidence: High Sample calculation · Müller family, Zürich-Wiedikon

Possible rent reduction

02.05.2026 #MS-2026-04829
CHF 162
per month
CHF 1'944
per year
Detected in the lease
Net rentCHF 2'780
Ancillary costsCHF 280
Contract start01.10.2021
Stored reference rate1.75%
Current reference rate1.25%
Create rent-reduction request Check your own details
Estimate based on uploaded documents. No guarantee. The landlord may raise objections.
03 - Pricing

Create a rent-reduction request – calculate first, pay later

The first check is free. You only pay if you want the finished rent-reduction request.

Free
First check
CHF 0
Understand whether a reduction is worthwhile.
  • Upload your lease
  • Automatic data extraction
  • Estimated rent reduction
  • Checklist of missing documents
  • Plain-language explanation
Check lease for free
Recommended
Rent-reduction request
CHF 39one-time
We create the request, send it to your landlord or property manager by registered mail via Swiss Post and monitor your rent for one year. No trip to the post office needed.
  • Personalised rent-reduction request (PDF)
  • Online signature, also with multiple tenants
  • Sent by registered mail to your landlord or property manager
  • Delivery tracking by email
  • PDF copy by email
  • 12 months rent monitoring
  • No printing, no post office visit
Create request
Optional
Rent monitoring
CHF 0free
Notification when the reference rate becomes relevant again.
  • Reference rate monitor
  • Email when a reduction becomes possible
  • Unsubscribe at any time
  • No credit card needed
Check lease for free
04 - What we check

Six factors. One calculation.

A rent reduction does not depend on gut feeling, but on a few clearly defined variables. We separate net rent from ancillary costs and compare the stored reference rate with the current one.

Current reference rate1.25%
Stored reference rate1.75%
Adjustment potential−2.91%
01
Net rent
The rent excluding ancillary costs – the basis of every rent-reduction request.
02
Ancillary costs
On-account or flat-rate amounts are treated separately.
03
Reference rate
Which rate was stored at the time of the last adjustment?
04
Last adjustment
Date and reason for the most recent rent change.
05
Index and graduated rent
Clauses that exclude or limit a rent reduction.
06
Notice period
Next termination date – determines from when the reduction can be claimed.
05 - Security

Your contract data stays your contract data.

Leases contain addresses, signatures and rent amounts. We store only what is needed for the check, the rent-reduction request and sending, and give you a deletion function.

Upload securely
Upload with consent
Documents are processed only after confirming the privacy notices.
Purpose limitation
Processing for extraction, calculation, rent-reduction request, payment and sending.
Delete at any time
One click deletes case data and uploaded documents.
AI service provider
Documents are transmitted to the configured AI provider for extraction.
No individual legal advice
The result is an initial estimate, not a legal review.
06 - Frequently asked questions

What you need to know.

Yes. The first check estimates your possible rent reduction. You only pay CHF 39 if you actually want us to create and send the rent-reduction request.
We create your personalised rent-reduction request based on your confirmed contract data, collect your digital signature and send it to your landlord or property manager by registered mail via Swiss Post. You receive the PDF copy, delivery tracking by email and 12 months of rent monitoring. No printing, no post office visit.
No. We handle printing, enveloping, addressing and posting as registered mail. You receive the tracking number by email.
Directly online – with a mouse, trackpad or finger on your smartphone. If several tenants are named in the lease (e.g. couples, flat shares), you can add co-signatories via QR code without them needing an account.
We monitor the Swiss mortgage reference rate for you. If it falls further, we notify you automatically and you can submit a new request.
No. You upload your lease, we extract the relevant data and guide you step by step through the check.
Ideally your lease and the most recent adjustment letter. If anything is missing, we tell you exactly what.
No. The result is an estimate based on your documents and Swiss tenancy law logic. The landlord may raise objections or offset other factors.
No. mietzins-senkung.ch is not a law firm and does not replace individual legal advice. For legal questions, contact a tenants' association, a conciliation authority or a specialist lawyer.
Yes. We support Swiss leases in German-speaking Switzerland; French and Italian are coming soon.
Your document is processed for automatic extraction and deleted by default after 30 days. Details are in the privacy policy.

Uploaded in a few minutes. Potentially CHF 1'944 less per year.

The first check is free. For CHF 39 we create your rent-reduction request and send it by registered mail via Swiss Post – including 12 months of rent monitoring. No post office visit needed.

Check lease for free

Free · Result in 2 minutes · CHF 39 only if you proceed

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