In Ireland, landlords are generally not legally required to pay tenants interest on a rental deposit. Interest may be payable if the tenancy agreement provides for it or if another specific arrangement applies, so check your written terms carefully. The deposit itself should be returned when the tenancy ends, less any lawful deductions, and disagreements can be taken through the RTB dispute resolution process. The outcome depends on the tenancy’s facts and evidence, so consider getting advice from a solicitor if a significant sum is involved.