Is this rent increase valid?

Four dates decide it. Put them in and this tells you which rule each one passes or fails — and, if you are the tenant, the last day you can challenge it.

Rules checked against GOV.UK and legislation.gov.uk on 2 September 2026 · England, assured tenancies · No signup, no email required

When did the tenancy begin?

What date is on the notice?

The date the Form 4A was given, not the date it was posted.

When is the new rent due to start?

Date of the last increase (optional)

The date it took effect. Leave blank if the rent has never been increased.

Rent day of the month (optional)

Only for tenancies where rent is paid monthly.

The one people get wrong. The form is Form 4A, not Form 4. Form 4 was the old section 13 notice. Since 1 May 2026 the correct notice is Form 4A: Landlord's notice proposing a new rent, and a notice on the wrong form is open to challenge.

The four rules this checks

1. Not in the first year

GOV.UK, to tenants, is unambiguous: “Your landlord can only increase your rent once a year. They cannot increase your rent in the first year of your tenancy.”

Source: Assured periodic tenancies: a guide for tenants — Rent increases

2. Once a year

The Renters' Rights Act Information Sheet 2026 puts it plainly: landlords “can only increase the rent once per year”. The clock runs from the date the last increase took effect, not the date the last notice was served.

3. At least two months' notice

The landlord must give the completed form “at least 2 months before you want the rent increase to start”. Two months exactly is enough — the statute says not less than two months, so the boundary is inclusive. One day short is not.

Source: Renting out your property: guidance for landlords and letting agents, and section 13(2)(a) of the Housing Act 1988.

4. It must start at the beginning of a rent period

Section 13(2) requires the new rent to begin at the start of a new period of the tenancy. For a monthly tenancy that means the rent day — not a date part-way through the month that happens to suit. This checker only tests it if you give it the rent day.

What this cannot tell you. Whether the new rent is at or below the open market rent. That is a valuation and it is the tribunal's job, not arithmetic. A notice can pass all four rules above and still be challenged as too high.

Section 13 is now the only route

This is the change that catches landlords who have done it the same way for years. Under the Renters' Rights Act, “rent increases by any other means – such as rent review clauses – will not be permitted”. A rent review clause in the tenancy agreement no longer does the job. The rent goes up by section 13 notice or it does not go up.

Source: Guide to the Renters' Rights Act. In force 1 May 2026.

Challenging it: the deadline nobody reads

A tenant who thinks the proposed rent is above the open market rent can apply to the First-tier Tribunal for an open market rent determination. There is a hard cut-off, and GOV.UK states it in terms that leave no room:

“You must apply before the start date of the new rent given in the notice, even if you're still collecting your supporting evidence.”

Miss it and the increase stands, however high it is. The checker above prints that date for you. Source: Apply for an open market rent determination.

What changed at the tribunal in May 2026

	Before 1 May 2026	Now
Can the tribunal set a rent higher than the landlord asked for?	Yes — a real risk that deterred tenants from applying	No. The Act ended it
When does a tribunal-set rent start?	Could be backdated	From the date of the determination, so tenants are not “unexpectedly thrust into debt”
Hardship	—	The tribunal can defer an increase by up to a further 2 months
Application fee	—	£47. Free for notices dated before 1 May 2026 and for social rented homes

Sources: Guide to the Renters' Rights Act and Apply for an open market rent determination.

Questions people ask

How much notice does a landlord have to give for a rent increase?

At least two months. GOV.UK says the landlord must give the completed form at least 2 months before the rent increase is to start, and section 13(2)(a) of the Housing Act 1988 says not less than two months. Exactly two months is enough; one day short is not.

Can my landlord increase the rent in the first year?

No. GOV.UK states: your landlord can only increase your rent once a year, and they cannot increase your rent in the first year of your tenancy.

Is it Form 4 or Form 4A?

Form 4A. Since 1 May 2026 the correct notice for an assured tenancy is Form 4A, Landlord's notice proposing a new rent. Form 4 was the earlier version and a lot of templates still circulating online use it.

Can my landlord use the rent review clause in my tenancy agreement instead?

No. Under the Renters' Rights Act, rent increases by any other means, such as rent review clauses, are not permitted. The section 13 notice is the only route for an assured tenancy.

What is the deadline to challenge a rent increase?

You must apply to the First-tier Tribunal before the start date of the new rent given in the notice, even if you are still collecting your supporting evidence. Once that date passes the increase stands.

Can the tribunal set my rent higher than the landlord asked for?

No. That risk existed before the Renters' Rights Act and the Act ended it. A tribunal determination can be lower than or the same as the rent in the landlord's notice.

If the tribunal lowers the rent, is it backdated?

No. The new rent applies from the date of the tribunal determination, so tenants are not unexpectedly thrust into debt. Where a tenant would suffer undue hardship the tribunal can defer an increase by up to a further two months.

How much does it cost to challenge a rent increase?

The application costs £47. It is free for notices dated before 1 May 2026 and for social rented properties, and help with the fee is available on low income.

One notice is a calculator. Forty is a job.

ProPixa tracks each tenancy's anniversary and last increase, so the next valid date is already worked out before you go looking for it — alongside the gas certificate, the EICR and the Right to Rent date. Built for UK letting agents and landlords.

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Related guides

Sources

Renters' Rights Act 2025 (c.26), and section 13 of the Housing Act 1988 as amended — legislation.gov.uk
Guide to the Renters' Rights Act — GOV.UK
Renters' Rights Act: an overview for landlords — GOV.UK
The Renters' Rights Act Information Sheet 2026 — GOV.UK
Renting out your property: guidance for landlords and letting agents, Rent increases — GOV.UK
Assured periodic tenancies: a guide for tenants, Rent increases — GOV.UK
Apply for an open market rent determination — GOV.UK

This page is general information for landlords, letting agents and tenants in England, not legal advice. It covers assured tenancies under the Renters' Rights Act 2025 and does not deal with Scotland, Wales, Northern Ireland, social housing rent-setting, or tenancies that are not assured. It cannot tell you whether a rent is at market level. Something here wrong or out of date? Email help@propixa.co.uk and we will fix it.