Your Form 4A just arrived: the first-week tenant playbook for the Renters' Rights Act

A Form 4A landed on your doormat. It is the new prescribed form for proposing a rent increase on a private residential tenancy in England under the Renters' Rights Act 2025. From 1 May 2026, every Section 13 rent increase notice must use it. Form 4 (the old form) is no longer valid for any service date on or after 1 May.

This is the day-by-day playbook for the first week. We walk through hour 1, day 1, days 2-7, and the next four weeks. Plain English. England only.

If you have not received a Form 4A yet but expect one, save this page — most of the first-week actions are the same regardless of when in May or June or beyond your form arrives.

The headline rule

Under the Renters' Rights Act 2025, your landlord can propose a rent increase only by serving a Form 4A. The form must:

• Give you at least two months' notice before the new rent takes effect
• Come at least 12 months after the last increase (and never in the first year of a new tenancy)
• Be signed and dated correctly
• Show your address and the proposed new rent

If any of those is wrong, the form is defective and the increase cannot legally take effect.

If the form is correct and you accept the proposed rent, you do nothing — the new rent kicks in on the change date. If you disagree, you can apply to the First-tier Tribunal (Property Chamber) for the open-market rent to be decided independently. The tribunal fee is £47, with Help with Fees available if you are on a low income.

Hour 1: stabilise

The first hour matters. Three actions in this order.

1. Check the form is actually Form 4A

Look at the top of the document. It should say "Form 4A" in the title and reference the Housing Act 1988 as amended by the Renters' Rights Act 2025.

If the form says "Form 4" instead — that is the old form. Form 4 is invalid for any service date on or after 1 May 2026. If your form is dated 1 May 2026 or later but uses Form 4, the notice is defective and the increase cannot take effect. (We have a separate post on the Form 4 vs Form 4A transition fortnight if your form was served between mid-April and 1 May 2026.)

2. Date-stamp it

Take a photo of the envelope showing the postmark, or the date you found it through the letterbox. Then write the date you received it on the form itself in pen, with your name. This creates an audit trail.

3. Save the PDF

Scan the form, or photograph each page with your phone, and save the result as a single PDF in a folder labelled with today's date. Email a copy to yourself or upload to cloud storage. The original paper version goes in a safe place — do not bin the envelope.

[!tip] Do not pay the new rent yet Even if the change date is two or three months away, keep paying your existing rent at the existing amount via your existing direct debit or standing order. Paying the proposed new rent before the change date — even by accident — can be argued as agreement by conduct. Keep paying the old amount, on time, every month.

Day 1: the five-question form check

Once you have the form under control, run it through five quick questions. Each takes about a minute.

Question 1: Is the proposed change date at least two months from today?

Find the box on the form headed "Date the new rent is to take effect from". Count the days from the date you received the form to the change date. It must be at least two months. Two months means two calendar months — if you received the form on 5 May, the change date must be 5 July or later.

If it is less than two months, the form is defective.

Question 2: Is it at least 12 months since your last rent increase?

Look at your tenancy paperwork or your bank statement. Find the date of the last rent change. It must be at least 12 months before the change date on the new Form 4A. If the last increase was in October 2025 and the new Form 4A proposes a change date of August 2026, that is fine. If the last increase was in November 2025 and the new change date is October 2026, that is fine. If the last increase was in November 2025 and the new change date is May 2026, that is too soon — the form is defective.

Question 3: Is it after the first year of your tenancy?

If your tenancy started less than 12 months ago, no rent increase is allowed yet under the Renters' Rights Act. The form is defective.

Question 4: Is the form signed and dated?

Look for a signature box or signed line. The form must be signed by the landlord or their authorised agent. An unsigned form is defective.

Question 5: Is the address right?

Check the property address on the form against your tenancy agreement. Typos, missing flat numbers, or the wrong house number can be defective. If the address is materially wrong, the form may not bind you.

If any of these five fail, you have grounds to query the form. We have templates for that further down.

Days 2-3: gather evidence

Even if the form passes the five-question check, you can still challenge the proposed rent at tribunal if you think it is above open-market rate. Days 2 and 3 are for evidence gathering.

Comparable lettings — the strongest evidence

Open Rightmove. Search for properties currently to let in your postcode area, same number of bedrooms, similar size and condition. Aim for three to five comparables. Save each listing as a PDF the day you find it — Rightmove listings disappear within weeks of being let.

For each comparable, note:

• Asking rent (per month, in £)
• Number of bedrooms
• Square footage (if shown)
• Garden / parking / pets allowed
• Condition (refurbished, modern, dated)
• Distance from your property (use Google Maps)

If the comparables average is below your landlord's proposed rent, that is your tribunal case in a nutshell.

Local agent letters (optional but strong)

Email two or three local letting agents asking for a free rental valuation of your property — describe the size, condition, and location, ask what they would advertise it at if it were on their books today. Save the replies. These add independent professional weight.

Property defects (if relevant)

If your property has any issues that would reduce the open-market rent — damp, broken boiler, noise, structural cracks, peeling paint, ageing kitchen — photograph each with a phone that records the date in the EXIF data. List them in a one-page document. The tribunal weighs these as reductions to the open-market rent.

[!info] Open-market rent test The tribunal will decide what a willing tenant would pay a willing landlord for your specific property in its current condition, based on comparable lettings in the local area. It is not what your landlord has paid in mortgage interest, not what they need to charge to break even, not what they got from previous tenants. It is the market rate for your property today.

Days 4-5: the application decision

By day 4, you have the form under control, the five-question check done, and three to five comparables saved. Now decide.

Path A: accept the proposed rent

If the form is valid and the proposed rent is in line with comparables (or your circumstances mean a tribunal challenge is not worth the effort), do nothing. The new rent will take effect on the change date, and you start paying the new amount from that date.

You do not need to write to your landlord to confirm acceptance. Silence is acceptance under the Form 4A regime.

Path B: negotiate informally with the landlord

Before going to tribunal, some tenants prefer to email or write to the landlord proposing a counter-figure based on comparables. Sample text:

Dear [landlord/agent],

Thank you for the Form 4A served on [date]. I have looked at comparable lettings on Rightmove and Zoopla in the [area] for [N]-bedroom properties of similar size and condition. The advertised rents range from £[X] to £[Y] per month.

Based on this, I think the open-market rent for [address] is closer to £[Z] per month rather than the £[proposed] you have proposed. Would you be willing to revise the proposal to £[Z]?

If we cannot agree, I will apply to the First-tier Tribunal for the rent to be set at the open-market rate, but I would prefer to resolve this amicably.

Best regards, [Your name]

Keep a copy. If the landlord agrees, both of you sign a brief acknowledgement of the new agreed rent and that becomes the new amount from the change date.

Path C: tribunal challenge

If informal negotiation fails or you want to skip it, apply to the First-tier Tribunal (Property Chamber) for the open-market rent to be decided.

You can apply online at gov.uk via Form Rents1 (the form for assured tenancy rent applications), or in paper form. You will need:

• The Form 4A (a copy)
• Your tenancy agreement
• Your evidence bundle (comparables, agent letters, property defect photos)
• The £47 fee (or Help with Fees form EX160 if eligible — see our Help with Fees walkthrough)

The tribunal will acknowledge your application within a few weeks, set a hearing date, and direct both sides to file evidence by certain deadlines. Most rent tribunal hearings are held in writing or by video — you do not need to attend in person unless the tribunal directs.

Days 6-7: file the application

If you chose Path C, days 6 and 7 are for filing. Aim to have your application in by the end of week 1.

The application has six sections. Walk through each:

1. Tenant details — your name, address, contact email and phone
2. Landlord details — name and address from the Form 4A
3. Property details — address, type, number of bedrooms
4. Tenancy details — start date, current rent, last increase date
5. Form 4A details — date served, change date, proposed new rent
6. Reason for challenge — short statement that the proposed rent is above open-market

Attach: Form 4A, tenancy agreement, evidence bundle.

Pay the £47 fee online or apply for Help with Fees in parallel. Submit.

The next four weeks

After the application:

• Week 2: Tribunal acknowledges receipt, assigns a case number, copies your application to your landlord
• Week 3-4: Both sides file evidence to the tribunal's directions
• Week 4-6: Tribunal makes a decision (often on the papers, sometimes by video hearing)
• Decision day: Tribunal sets a rent for your property; this becomes the new rent from the date of the decision (no backdating under RRA)

Throughout: keep paying your existing rent at the existing amount.

Day-by-day map for tenants whose Form 4A arrives in the first week of RRA

If your Form 4A arrives between 1-8 May 2026:

Date received	Hour 1	Day 1	Days 2-3	Days 4-5	Days 6-7
1 May (Friday)	Form check, photo, save PDF	Five-question check	Comparables on Rightmove	Decide accept / negotiate / tribunal	File tribunal application
2 May (Saturday)	Same	Same	Same	Same	Same
3 May (Sunday)	Same	Same	Same	Same	Same
4 May (Bank Holiday Mon)	Same — public-holiday post can take longer	Same	Same	Same	File on Tuesday
5 May (Tuesday)	Same	Same	Same	Same	Same
6 May	Same	Same	Same	Same	Same
7 May	Same	Same	Same	Same	Same
8 May	Same	Same	Same	Same	Same

The dates shift but the playbook is identical. The only public holiday in this window is the early May bank holiday on Monday 4 May 2026 — Royal Mail does not deliver, the tribunal is shut, and any deadline that falls on the bank holiday rolls to the next working day.

Three response templates

Template 1: query the form (any of the five-question checks fail)

Dear [landlord/agent],

I received the Form 4A you served on [date received]. After reviewing it, I think there may be issues with the form's validity:

[List the specific issue — e.g. "The change date is less than two months from the date of service" or "The form was signed but not dated" or "The address shown is incorrect"]

Could you confirm the form is valid as served, or revise and reissue if not? I will hold any tribunal application pending your reply.

Best regards, [Your name]

Template 2: counter-propose

Dear [landlord/agent],

Thank you for the Form 4A served on [date]. Based on comparable lettings in [area] currently advertised at £[X-Y] for [N]-bedroom properties of similar size and condition, I believe the open-market rent for [address] is closer to £[Z] per month rather than the £[proposed] in your notice.

Would you be willing to revise the proposal to £[Z]? If we can agree, I will not apply to tribunal.

Best regards, [Your name]

Template 3: notify of tribunal application

Dear [landlord/agent],

I have today applied to the First-tier Tribunal (Property Chamber) for the open-market rent for [address] to be determined under the Renters' Rights Act 2025. The tribunal will acknowledge my application and contact you in due course.

Until the tribunal decides, I will continue paying the existing rent of £[current] per month on the usual date.

Best regards, [Your name]

Five common Form 4A defects to look for

1. Wrong form — Form 4 served for an effective date on or after 1 May 2026 is invalid
2. Less than two months notice — change date earlier than two months after service
3. Within 12 months of last increase — too soon under RRA
4. Within first year of tenancy — no increase allowed yet
5. Unsigned or undated — invalid on its face

If any of these apply, the notice is defective and you do not have to accept the increase. You can either ignore it (and continue paying the existing rent — risky if the landlord disputes), or write to the landlord using Template 1 to flag the defect.

What does NOT change on 1 May

• Fixed-term tenancies are not affected by the Renters' Rights Act in the same way — RRA primarily applies to assured periodic tenancies. If you are inside a fixed term, your rent cannot usually be increased mid-term unless your tenancy agreement specifies a clause (and most rent review clauses are now void under RRA — see our decision tree)
• Commercial tenancies are unaffected
• Devolved nations (Scotland, Wales, Northern Ireland) have their own rules — RRA is England only

What if the landlord retaliates after I challenge?

Section 21 no-fault evictions are abolished under RRA from 1 May 2026. Your landlord can no longer evict you simply because you challenged the rent. If you receive a Section 8 notice claiming a fault-based reason after challenging, that is potentially retaliatory eviction territory and you should seek advice immediately.

We have a separate post on landlord harassment after a tenant challenge covering the full retaliation playbook — visits, communication frequency, repair refusal, and the new Private Landlord Ombudsman.

When to get help

This guide gets most tenants through the first week without professional support. Get help if:

• The form has a defect and the landlord disputes it
• The proposed rent is more than 30% above market and you suspect bad faith
• The landlord begins retaliatory behaviour
• You are on Universal Credit or low income and need help with the £47 fee

Free, regulated advice is available from:

• Citizens Advice — generalist, free
• Shelter England — specialist housing advice, free
• Local council Tenancy Relations Officer — free for harassment / retaliation
• Law Centres — free legal advice if you qualify financially

The bigger picture

The Renters' Rights Act 2025 is the single biggest tenant-friendly reform in a generation. The Form 4A regime is one of the most consequential parts — it removes Section 21 backdating risk and caps tribunal outcomes at the landlord's proposed figure. Both are tenant advantages that did not exist before 1 May 2026.

The hardest part of the new system is the first week. Once you have the form under control, the comparables saved, and the application filed, the tribunal does the rest. You stay on your existing rent the whole way through. You cannot lose money on the challenge under RRA — only the £47 fee is at risk, and Help with Fees covers that for many tenants.

Take it one step at a time. The playbook above is in the right order. Hour 1, day 1, days 2-3, days 4-5, days 6-7. By the end of week 1 you have either accepted, negotiated, or applied. That is the entire job.