Do you need to adjust something in your rental agreement? Depending on whether the agreement is already signed or not, the process looks a little different. Here we explain how to proceed, and when you as a landlord can update an ongoing rental agreement yourself.
Before the rental agreement is signed
When you are in the conversation with the tenant and creating the draft of the rental agreement, you can edit almost all content yourself.
Make changes yourself: The landlord can adjust the rental period, rent amount, and special conditions directly in the tool before sending it for signing.
Step-by-step: Go to the conversation with the tenant –> the rental agreement –> edit.
Incorrect address? If the address of the home is incorrect, you cannot change this yourself. Contact our customer service via chat or create a ticket and we will help you correct it within a few minutes.
Here you can read about how a correct termination is made as a landlord, and as a tenant.
After the rental agreement is signed
Once both parties have signed the agreement, it is a legally binding document. Some changes you can make yourself, while others require assistance from us.
What you can do yourself
Change the end date or terminate the agreement:
Go to qasa.com —> Menu —> My leases —> Details —> Terminate agreement.
Note: If you only want to adjust the end date, you still perform a termination to the new date. Both parties must sign the termination/change digitally for it to be valid.
Update an ongoing rental agreement yourself (landlord)
If you have signed a rental agreement through Qasa from 19 August 2026 onward, you are covered by a self-service where you, as a landlord, can make some changes to an ongoing rental agreement yourself, without contacting us.
Did you sign the rental agreement before 19 August 2026? Contact our support and we will help you with the change.
You find the self-service at qasa.com —> Menu —> My leases —> Details. There you will see the card Lease agreement updates with the button Update lease. If you do not see the card even though you signed the agreement from this date onward, contact our support and we will help you.
You can update:
- Rent and other costs: For example electricity, water, parking and media costs. You enter from when the change should apply and for how long. It can apply until further notice or at most until the end of the rental agreement. You can change these costs on an ongoing basis.
- Move-in date (start date of the rental): This can only be changed before a payment has been processed.
- Details about the home: You can add an apartment number if it is missing from the rental agreement. The address and an existing apartment number cannot be changed. You then need to sign a new rental agreement.
One update can contain several changes at once, for example both a new rent and a new media cost.
How to do it:
- Start the update: Press Update lease under Lease agreement updates.
- Choose the change: Choose what you want to change and enter the new information.
- Preview: You see a summary of the changes and confirm them before you sign.
- Sign: You sign the update digitally with ID verification.
- The tenant signs: The tenant receives an email when you have started the update. The tenant reviews and signs it when logging in to My leases. [OPEN QUESTION: is there a time limit for the tenant's signing?] Once both have signed, the update is attached to the rental agreement.
Good to know:
- Only the landlord can start an update.
- The change only applies once both parties have signed.
- You can only have one update in progress at a time. If not everyone has signed the update, you can cancel it.
- Under Lease history you see the history of all changes, cancellations and terminations.
- If you cannot select an earlier date, it is because the period has already been processed. The change can then apply only from the next period that has not been processed.
- If the rent you enter deviates a lot from Qasa's recommendation, our support needs to approve the change. Contact our customer support in that case.
- Only some details in the rental agreement can be updated yourself. For everything else, our customer support will help you, see below.
What you need help with
The following changes must be administered by Qasa's customer support. If you signed your rental agreement from 19 August 2026 onward, you can make some of them yourself as a landlord, see above:
Adjustment or increase of the rent.
Change of start date.
Editing of paragraphs (e.g., what is included in the rent, furnishing, etc.).
- Changes to rental agreements signed before 19 August 2026.
- Rent that deviates a lot from Qasa's recommendation.
How a change works via our support (step-by-step)
For us at Qasa to be able to implement changes in a signed agreement, a written agreement between the landlord and tenant is required.
Communicate: Talk to your counterparty in the chat on Qasa and agree on the change.
Contact support: Create a ticket for our support. Attach a screenshot of your agreement and clearly describe what should be changed.
Signing: Qasa prepares an addendum/amendment. Both parties then sign this digitally.
Update: When the signing is complete, we update the system and ensure that future invoices are correct.
Important: No changes to the system or invoices are made until both parties have signed the change. However, we can terminate an agreement if one party has submitted documentation proving a correctly served termination according to the notice period.