Mortgage interest tax relief (Section 24) can change UK rental income tax outcomes. This guide explains key caveats and how to use this MVP estimator as a simplified baseline, then verify using official guidance.
Mortgage interest treatment can materially affect a landlord's final tax outcome. People searching "mortgage interest" often want to know how much the interest reduces taxable income or tax due.
This MVP rental estimator does not model mortgage interest relief (Section 24). It estimates incremental Income Tax from net rental profit using selected tax-year bands.
Use the result as a baseline planning estimate, then verify your mortgage interest treatment using official guidance or an accountant if Section 24 applies to you.
Last updated: 2026-04-20
No. This MVP does not model mortgage interest relief (Section 24).
Use official guidance to determine what is allowable in your case. This tool expects net profit, but does not guarantee that a given item is allowable.
Yes for a simplified baseline (marginal-rate intuition), but you must verify final liability if mortgage interest relief applies.