No. Rising costs may influence a landlord’s decision, but they do not automatically give them the legal right to increase your rent. In Ireland, rent increases are subject to statutory limits, timing rules and notice requirements, which can depend on your tenancy and the property’s applicable rent-control rules. If you believe an increase is unlawful, you can seek information from the RTB and may be able to challenge it through its dispute resolution process; the outcome depends on the facts of your tenancy.