Rule 21 says when rent receivable but not paid counts as rent the owner cannot realise for section 21(4): the tenancy must be bona fide, the tenant gone or being made to go, and the assessee must have taken reasonable steps to recover it.
21
Rules 2026 · Rule 21
Unrealised rent (s. 21(4))
Rules 15-21
The rule. For section 21(4), the rent the owner cannot realise equals the rent receivable by the assessee but not paid by a tenant, and so proved to be lost and irrecoverable, where all four conditions hold:
In practice. Keep the tenancy agreement, evidence of the notice or steps taken to get the tenant out, and either the record of legal steps or a written explanation of why they would be futile, since limb (d) turns on what the assessee can show.