1. The figure
Check what comparable homes support
Start with evidence from genuinely similar properties. Location, bedrooms, condition, furnishings and included services can matter more than a broad area average.
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Section 13 tool guide
How to use the Rent Increase & Challenge Checker before you serve Form 4A
Use the checker when you know you want to increase rent, but you still need to know whether the figure is supportable and which Section 13 pack fits the risk.
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2. The evidence
Keep a record of the comparison
Save the listings, dates and reasons for including or excluding each comparable. A clear evidence trail is more useful than a long list of properties that do not match the let.
3. The route
Choose paperwork that fits the risk
A supportable proposal can follow the standard notice route. Existing objections, weak comparables or a likely tribunal challenge call for a fuller evidence and response file.
Start with the decision in front of you
Before you serve Form 4A, you need to know whether the proposed rent is a sensible figure to stand behind. The checker gives you that first read before you commit to the paperwork.
That matters because a Section 13 file can look tidy on the surface while still being weak underneath. A clean form does not fix a poor figure, stale evidence, or a story that changes once the tenant pushes back.
Read the result like a landlord decision
The useful result answers three questions quickly: where the rent sits against the local market, how strong the evidence looks, and what you should do next.
If the evidence is strong but the proposed figure sits high, the issue is not weak preparation. The issue may be that the figure is too ambitious for the current market calculation.
Move into the right paid route
Use the Supported Rent Increase Pack when the figure looks supportable and you want the notice, rent summary, and service record aligned. Use the Tribunal-Ready route when the rent may still be arguable but the tenant is likely to test it.
That is the point of the free tool: it turns research into a practical next step instead of leaving you with a pile of guidance and no clear route.
Your next decision
Check first, then prepare only what the case needs
Use the free checker to test the proposed rent and the strength of the evidence. If the result supports the increase, continue to the notice route. If the tenant has objected or the evidence is borderline, review the challenge route before serving anything. This keeps the paid step tied to the facts instead of asking you to choose a pack too early.
