For years, the rent increase was a quiet letter. A figure, a date, a signature. The tenant grumbled, paid, and moved on — because challenging it was a gamble they were likely to lose.
That world ended on 1 May 2026.
The Renters' Rights Act 2025 didn't just tidy up the rules around rent increases. It quietly rewired the incentives — and most of that rewiring now runs in the tenant's favour. If your default is still “serve the notice, say as little as possible, hope it sticks,” you're carrying risk you don't need to, on behalf of landlords trusting you to protect their income.
This is a piece about a small change in behaviour that takes the risk off the table: giving tenants the why behind the number, up front, backed by data. Here's the case for it.
What actually changed — and why it matters to you
Strip away the headlines and four things now define how rent increases work:
- One increase per year. Rent on a periodic assured tenancy can be raised only once every 12 months, and only through the statutory Section 13 process (the new Form 4A). Rent review clauses in old agreements are void. You get one shot a year — so it needs to land.
- Two months' notice. The notice period doubled from one month to two. More runway for the tenant to think, research, and — if they choose — challenge.
- The tribunal got cheaper and safer for tenants. A tenant can refer a proposed increase to the First-tier Tribunal for around £47.
- The tenant can no longer lose. Under the old rules, a tenant who challenged risked the tribunal setting the rent higher than the landlord asked. That gamble is gone. The tribunal can now only confirm or reduce the proposed rent — never raise it above what's on the notice.
Read that last point again, because it's the hinge the whole argument turns on.
Before, a challenge was a coin-flip a tenant could lose. Now it's a free lottery ticket with no downside. Worst case, they pay the rent you proposed — exactly what they'd have paid anyway. Best case, the tribunal knocks it down. And even when a challenge fails, it typically pushes back the date the higher rent starts — and the tribunal can delay it further on hardship grounds.
The danger isn't the increase. It's the silence around it.
Picture the two letters that land on a tenant's doormat.
Letter A is the old way. A Form 4A. A new figure. A date. Nothing else. To the tenant it reads as a demand with no reasoning — and in a climate where average UK private rents have been climbing well above 5% a year, an unexplained increase feels less like a market adjustment and more like a chancer trying it on.
What does a reasonable, slightly anxious tenant do with an unexplained demand and a £47 route to challenge it? They Google. And the first thing Google now serves them is an entire industry built around exactly this moment.
Letter B is the new way. The same Form 4A — but alongside it, a clear, branded document showing the tenant precisely why the rent is moving to where it is: comparable local rents, current market evidence, the data any tribunal would look at anyway. No legalese. No spin. Just the reasoning, shown plainly, one professional to another.
Same increase. Two completely different psychological events.
Letter A invites a challenge by leaving a vacuum. Letter B closes the vacuum before it can form — because the tenant looking at Letter B already has the answer to the only question a tribunal asks: is this rent above the open-market rate? And the answer, laid out in front of them, is no.
What “Letter B” looks like in practice
Below is the kind of evidence a tenant receives alongside the Section 13 notice — drawn from a real Propalt rent increase report for a four-bed detached home in Grays. This is the document that does the persuading. Walk through it as a tenant would.
REPORT — FRONT PAGE
Your Rent Review — What You Need to Know
11 Fenton Road, Grays, RM16 6EP
| £1,400 Current rent (pcm) | £2,100 Proposed rent (pcm) | +£700 / +50% The increase |
“This report gives you the same market information a First-tier Tribunal would consider. Our aim is transparency — not pressure.”
REPORT — WHY IS RENT CHANGING?
The report opens by explaining, in plain English, that rent is set by the market, not by the landlord's preference — and that a tribunal would independently assess the open-market rent if challenged. It then shows what's happened locally: four-bed detached homes in Grays have let for £2,200–£2,500 pcm in the six months to June 2026, averaging £2,300. The proposed £2,100 is positioned deliberately below that average, with the reasoning shown.
REPORT — WHAT SIMILAR HOMES ARE LETTING FOR
Then the proof: the actual comparable lets a tribunal would weigh. Real addresses, real rents, real days-to-let. The subject property is shown in context — the largest in the set, yet proposed at a rent below several smaller homes.
| Address | Beds | Sq Ft | Rent (pcm) | EPC | Let Agreed | Days |
| 30 Antelope Avenue, Grays, RM16 6QT | 4 | 1,389 | £2,250 | D | Mar 2026 | 10 |
| 8 San Marcos Drive, Grays, RM16 6LT | 4 | 1,668 | £2,500 | C | Feb 2026 | 21 |
| 29 John William Close, Grays, RM16 6ED | 4 | 1,259 | £2,300 | C | Jan 2026 | 6 |
| 21 Victory Close, Grays, RM16 6RT | 4 | 1,163 | £2,300 | C | Dec 2025 | 18 |
| 17 Hodges Close, Grays, RM16 6EN | 4 | 1,884 | £2,250 | C | Feb 2026 | 71 |
| 1 Sandown Close, Orsett, RM16 3AQ | 4 | 1,184 | £2,200 | C | Mar 2026 | 17 |
| 11 Fenton Road (your home) | 4 | 2,293 | £2,100* | D | — | — |
- Proposed rent. At 2,293 sq ft, 11 Fenton Road is the largest property in this set — yet even at £2,100 its price per square foot is lower than several smaller homes above.
REPORT — YOUR RIGHTS, IN PLAIN ENGLISH
Crucially, the report doesn't hide the tenant's rights — it states them clearly: the right to two months' notice, the right to challenge at the tribunal, what the tribunal looks at, and the right to simply pick up the phone and talk. Transparency about their rights is part of what makes the evidence persuasive. A tenant who feels respected, and who can see the rent is fair, has little reason to fight it.
The claims firms are already circling
Where there's a low-cost, no-downside route to claw money back, an advice industry follows. It always does — think PPI, deposit claims, energy mis-billing. The rent tribunal is next.
A tenant who receives an unexplained increase is the perfect lead for a “challenge your rent increase, no win no fee” outfit, or a free online template promising to “fight back” for the price of a £47 form. These services don't need your increase to be wrong. They only need it to be unexplained — because an unexplained number is easy to frame as an unfair one.
You take that fuel away the moment you show your working. A tenant holding clear evidence that their proposed rent sits at or below market is a terrible candidate for a speculative challenge. There's nothing for the claims firm to grab. You've answered the case before it's made.
What clarity actually does — three ways it pays out
Giving the tenant the evidence up front isn't soft. It's strategic:
For the tenant
It removes the sense of being done to. People accept difficult news far more readily when they understand the reasoning and feel respected by it. An evidenced increase is a fair one — and most tenants, shown a fair one, pay it and stay.
For the landlord
It protects what they actually care about: continuity of income at market rate, without a two-month tribunal delay and without a vacancy. A challenged increase is not neutral — it can defer the uplift, dent the relationship, and prompt a good tenant to leave over what felt like a cold demand. Re-letting costs far more than the increase was ever worth.
For you
It's the difference between sending one clear letter and managing a dispute. Tribunal challenges eat hours — evidence-gathering, correspondence, the landlord asking why this is happening. Every challenge you pre-empt is time and goodwill you keep. And the agent who handles increases this professionally is the agent landlords don't leave.
Make this your standard process — not your exception
Here's the practical shift. Stop treating the rent increase as an administrative task and start treating it as a justification task. Every Section 13 notice should leave your office paired with a clear, tenant-friendly explanation of the market evidence behind it.
The objection is obvious: who has time to build a bespoke market-evidence document for every tenancy? Fair. Doing this by hand — pulling comparables, formatting it, keeping it plain enough for a tenant to actually read — is exactly the work that never quite happens when you're managing a full portfolio.
That's the problem Propalt's tenant rent increase report is built to solve.
It generates the document you just walked through — tenant-facing, plain English, no jargon — justifying a proposed increase using live comparable rents and local market data. The same data a tribunal would weigh, presented as a reason rather than a demand. You produce it in the time it takes to pull up the address, send it alongside the Form 4A, and turn a letter that invites a £47 challenge into one that quietly closes the door on it.
It's available now. If you manage tenancies, it should be part of how every rent increase goes out — not a tool you reach for once a challenge has already landed.
The agents who'll come through the next few years with their portfolios and landlord relationships intact aren't the ones who increase rents the hardest. They're the ones who increase them the most clearly.
Say nothing, and you're betting against a tenant who now has nothing to lose. Show your working, and there's no bet to make.
Propalt's tenant rent increase report turns a rent review into an evidenced, tenant-ready justification in minutes — using the live comparable and market data agents already trust.
This article reflects the rent increase provisions of the Renters' Rights Act 2025 as they apply in England from 1 May 2026, and is general information for letting professionals — not legal advice. Tribunal fees and procedural details can change; confirm the current position before relying on it.
