Do I have any rights if my tenancy is not registered?

Yes, all of them. Rent control, notice periods, deposit rules and the right to bring a dispute apply whether or not the landlord registered. Registration is the landlord's obligation, not a condition of your protection.

How do I check if my tenancy is registered?

Ask the landlord or agent for the registration number in writing. A registered landlord produces it without difficulty. If none comes, the Residential Tenancies Board can confirm whether a tenancy at an address is registered.

What happens to a landlord who does not register?

There are sanctions, and in practice the more immediate consequence is that they cannot bring a dispute to the Board against you until they do. A tenant can bring one either way.

Do I need the RTB number to claim the Rent Tax Credit?

The claim asks for it where there is one, but the credit does not depend on the landlord having registered. Records of payment and the tenancy agreement are what establish the claim.

Whether your tenancy is registered, and why it matters

Registration is the landlord's duty, not yours, and an unregistered tenancy still has every protection. What it changes in practice.

A landlord must register a tenancy with the Residential Tenancies Board and renew that registration each year. It is their obligation and there are sanctions for not doing it. It is not something a tenant can be penalised for.

What it changes in practice

A landlord who has not registered cannot bring a dispute to the Board against you until they do. A tenant can bring one either way.
Registration is what Revenue looks for when a landlord claims expenses against rental income, so an unregistered tenancy often signals income that is not being declared.
The Rent Tax Credit is claimed by the tenant and does not require the landlord to have registered, although the claim asks for the registration number where there is one.

How to check

Ask the landlord or agent for the registration number, in writing. A registered landlord has it to hand and produces it without difficulty. If none is forthcoming, the Board can confirm whether a tenancy at an address is registered, and that request is the point at which a good many registrations get filed late.

What to keep regardless

The tenancy agreement, and the advertisement if you still have it.
Every rent payment, through a bank rather than in cash. A record of payment is a record of tenancy.
Any written communication about rent, repairs or notice.

Those three between them establish that a tenancy existed, when it started and what the rent was, which is everything the Board needs. Registration is the landlord's paperwork. Yours is proof of the arrangement, and it is worth more.

Questions people ask

Do I have any rights if my tenancy is not registered?: Yes, all of them. Rent control, notice periods, deposit rules and the right to bring a dispute apply whether or not the landlord registered. Registration is the landlord's obligation, not a condition of your protection.
How do I check if my tenancy is registered?: Ask the landlord or agent for the registration number in writing. A registered landlord produces it without difficulty. If none comes, the Residential Tenancies Board can confirm whether a tenancy at an address is registered.
What happens to a landlord who does not register?: There are sanctions, and in practice the more immediate consequence is that they cannot bring a dispute to the Board against you until they do. A tenant can bring one either way.
Do I need the RTB number to claim the Rent Tax Credit?: The claim asks for it where there is one, but the credit does not depend on the landlord having registered. Records of payment and the tenancy agreement are what establish the claim.

Figures checked 8 August 2026.