Form 4A Rent Increase Notice | s.13 Housing Act 1988

A Form 4A is the prescribed statutory notice a landlord uses to propose a new rent on an assured periodic tenancy under section 13 of the Housing Act 1988, as amended by the Renters' Rights Act 2025. It is not a letter, not an email, and not a clause in the original agreement. It is a specific government form with numbered questions, and the rent increase only takes legal effect if that form is completed correctly and served with the right notice period.

People often confuse this with two other things. The first is a rent review clause, the automatic "rent rises 3% each April" wording that used to sit in most assured shorthold tenancy agreements. Since 1 May 2026 those clauses no longer bite on a periodic tenancy, so a landlord cannot rely on them to push rent up. The second is a voluntary variation, where landlord and tenant simply agree a new figure in writing. That remains lawful, but it depends entirely on the tenant saying yes. Form 4A is the route that works whether the tenant agrees or not.

One naming point trips people up. Form 4A is for private rented sector assured tenancies. The old Form 4 still exists, but it now applies to social housing assured tenancies only. Serving the wrong form invalidates the increase, even if every figure on it is correct, so the distinction is not academic. If you are setting up the tenancy itself rather than raising the rent, our assured shorthold tenancy agreement template covers the grant of the tenancy and the clauses that feed into any later rent review.

Rent increases on periodic assured tenancies in England are governed by section 13 of the Housing Act 1988, rewritten by section 6 of the Renters' Rights Act 2025, which inserted a new subsection 13(4A). The headline effect is that the statutory Section 13 procedure became the single permitted method of increasing rent on an assured periodic tenancy. Contractual rent review clauses lost their effect, and a landlord who tries to enforce one is enforcing nothing.

The prescribed form is set by regulations made under the Act. Form 4A replaced the Form 4 that had been prescribed under the Assured Tenancies and Agricultural Occupancies (Forms) (England) Regulations 2015. The replacement was needed because Form 4 said nothing about the new constraints the Renters' Rights Act 2025 introduced, in particular the once-a-year rule and the abolition of the contractual route. The current blank form is published free on GOV.UK, and the wording is updated periodically, so a landlord should download a fresh copy each time rather than reuse an old one. The official guidance and downloadable form sit in the GOV.UK collection of assured tenancy forms for privately rented properties from 1 May 2026.

Three statutory limits shape every valid notice. The minimum notice period doubled to two months, up from the single month required for monthly tenancies under the old rules. A landlord may propose an increase only once in any 12-month period, with the clock running from the date the last increase took effect rather than the date of service. And the new rent must take effect on the first day of a rental period, not on a date that happens to be convenient. Each of these is a hard requirement, not a guideline, and missing any one of them means the notice fails and the rent stays where it is until a fresh, compliant notice runs its course.

The First-tier Tribunal (Property Chamber) sits behind the whole process. A tenant who thinks the proposed figure is above market rent can refer the notice to the Tribunal, which assesses the open market rent for the property in its current condition. The change worth knowing here is structural: under the new rules the Tribunal cannot set a rent higher than the figure the landlord proposed. That removes the old deterrent and makes a defensible, evidence-backed figure more important than it used to be.

The everyday trigger is the annual review, when costs have risen and the rent has fallen behind the market. On a periodic tenancy that means Form 4A, because there is no longer a contractual clause to fall back on. Most landlords reach for it once a year, which fits neatly with the statutory once-in-12-months ceiling. A landlord who tries to squeeze in a second increase inside that window will find the notice rejected on its face.

A second common situation is the expired fixed term that has rolled into a periodic tenancy. Since 1 May 2026 assured tenancies cannot have a fixed end date, so tenancies that used to convert into a statutory periodic tenancy now simply run on as assured periodic tenancies. The first lawful rent increase on that rolling arrangement goes through Section 13 and Form 4A. You cannot use Form 4A during a fixed term that is still running, which catches out landlords mid-way through an older agreement.

The form also comes into play when a rent review clause has gone stale. Plenty of older agreements still contain "rent increases each April" wording, and landlords assume it still works. It does not. To change the rent lawfully, the increase has to be re-routed through the statutory notice. The same applies where a landlord and tenant cannot reach a voluntary agreement: the moment the conversation stops being a friendly negotiation, Form 4A is the only path that does not need the tenant's signature. If your wider concern is documenting what the tenant actually pays, a UK rent receipt and rent statement template keeps the payment record clean alongside the increase.

One edge case worth flagging: certain tenancies sit outside Section 13 altogether. Holiday lets, company lets, resident landlord arrangements and high-value tenancies above the upper rent limit are not assured periodic tenancies, so Form 4A is the wrong tool. Tenancies in Wales follow the Renting Homes (Wales) Act 2016, and Scotland and Northern Ireland have their own devolved regimes.

• The prescribed Form 4A wording is reproduced in full, with the numbered questions in the exact order the regulations require. A rent increase served on any other document, however accurate, is not valid, so the form has to track the official version rather than paraphrase it.
• The property and party details capture the full address of the let property and the names of every tenant under the tenancy. Where there are joint tenants, all of them are named, because a notice that omits a joint tenant is open to challenge on service grounds.
• The proposed new rent and effective date fields are built around the rule that the increase must start on the first day of a rental period and at least two months after service. The template prompts you for the rent period so the effective date lands correctly rather than on an arbitrary calendar day.
• The last increase date field records when the rent was previously raised, whether by an old Form 4, a now-defunct review clause, or an addendum. This is what evidences compliance with the once-in-12-months rule, and it is left blank where the rent has never been increased since the tenancy began.
• The rent breakdown separates the rent itself from anything the tenant pays separately. Council tax, utilities and services billed apart from rent are deliberately excluded, because folding them in distorts the figure the First-tier Tribunal would later assess.
• The service and evidence section records how and when the notice was given to the tenant. Keeping proof of service, a certificate of posting or a witnessed handover, matters because the burden of showing valid service falls on the landlord if the increase is disputed.

England is the only nation where Form 4A applies. The Renters' Rights Act 2025 and the amended section 13 of the Housing Act 1988 govern assured periodic tenancies here, and the once-a-year limit, two-month notice period and Tribunal referral route all flow from that framework. A landlord letting in England should treat the GOV.UK form as the single source of truth and download it fresh each time, since the prescribed wording is revised from time to time.

Wales does not use Form 4A or the assured tenancy regime at all. Residential lettings in Wales fall under the Renting Homes (Wales) Act 2016, which replaced assured shorthold tenancies with occupation contracts and has its own distinct rent variation procedure and notice forms. A landlord with property on both sides of the border cannot reuse an English Form 4A in Cardiff or Swansea; the Welsh process is a separate exercise with separate paperwork.

Scotland operates an entirely devolved system built around the private residential tenancy under the Private Housing (Tenancies) (Scotland) Act 2016. Rent increases there run through a rent-increase notice to the tenant with referral rights to a Rent Officer and the First-tier Tribunal for Scotland, and rent pressure zone rules can apply in designated areas. None of the English Section 13 mechanics carry across.

Northern Ireland has its own private tenancies legislation and does not recognise the assured periodic tenancy or Form 4A. Landlords letting in Belfast or elsewhere in the province follow the Northern Irish statutory scheme, which sets different notice requirements. The practical takeaway for any cross-border landlord is simple: the document is England-only, and the other three nations each need their own approach. Landlords who also employ staff to manage their portfolio may separately need a UK employment contract template for any property manager they take on directly.

You start by confirming the tenancy is an assured periodic tenancy in England, because the form is the wrong tool for fixed terms, Welsh occupation contracts or excluded lettings. From there the template walks you through the property address and the names of every tenant, prompting you to include all joint tenants rather than just the lead name. You then enter the current rent and the proposed new rent, keeping the figure to the rent alone and leaving out anything the tenant pays separately.

The pivotal step is the effective date. You tell the form how often rent falls due, and it steers the new rent onto the first day of a rental period at least two months ahead, so the date in the equivalent of question 4.6 lands lawfully rather than on a convenient guess. You record the date of the last increase to evidence the once-a-year rule, leaving it blank if the rent has never risen. Finally you complete the service details and keep a copy with proof of how and when it was served. A landlord managing several lets often pairs this with the broader catalogue of UK legal document templates to keep notices, receipts and tenancy paperwork consistent across a portfolio.

The most damaging error is reaching for the old form. Form 4 is now a social-housing document, and a private landlord who downloads it by habit serves an invalid notice. The same fate meets a landlord who drafts a polite letter or sends an email setting out the new rent: the increase has no statutory effect because it is not on the prescribed Form 4A. Almost as common is getting the effective date wrong, either by giving less than two months' notice or by picking a date that is not the first day of a rental period. Both faults sink the notice entirely, and because a fresh notice restarts the two-month clock, the mistake costs months of lost increase rather than a quick correction.

Timing errors of a different kind catch experienced landlords too. Serving a second Form 4A inside the same 12-month window breaches the once-a-year rule, and relying on a tenancy agreement's rent review clause ignores that those clauses are now void on periodic tenancies. Then there is the figure itself. A landlord who proposes a rent well above the local market invites a First-tier Tribunal referral, and while the Tribunal can no longer push the rent above the proposed figure, it can certainly cut it down to the market rate. Proposing a defensible, evidence-backed rent is now the safest strategy, because an inflated figure simply hands the tenant a reason to challenge with nothing to lose. Building a small evidence file of local comparables before serving is the kind of groundwork that separates a clean increase from a contested one. Landlords running a lettings company should also keep their corporate paperwork in order, and a UK articles of association template sits alongside the tenancy documents for that purpose.