Tenant-right is a term in the common law system expressing the right to compensation which a tenant has, either by custom or by law, against his landlord for increment at the termination of his tenancy.^[1]

In England, it was governed for most part by the Agricultural Holdings Acts and the Allotments and Small Holdings Acts. The preceding were reformed by the Agricultural Tenancies Act 1995. In Ireland, tenant-right was a custom, prevailing particularly in Ulster, known as the Custom of Ulster, by which the tenant acquired a right not to have his rent raised arbitrarily at the expiration of his term. This resulted in Ulster in considerable fixity of tenure and, in case of a desire on the part of the tenant to sell his farm, made the tenant-right of considerable capital value, amounting often to many years rent.^[1]

The Evesham Custom is one example of a tenant-right custom still in 21st century operation, having been given a specific exemption from the Agricultural Tenancies Act 1995.^{[citation needed]}