Average rent increases in Ireland vary by location, property type and whether the tenancy is new or ongoing, so a national figure may not reflect your situation. The RTB’s quarterly Rent Index is the main official source for comparing rents over time, while the CSO and government housing statistics may provide wider market context. For an existing tenancy, the rent increase rules applying to your property and tenancy date are also important, including any Rent Pressure Zone or national rent-control restrictions. Check the latest RTB and government guidance, or speak to a qualified adviser if you are unsure whether a proposed increase is lawful.