How Much Can a Landlord Increase Rent in England? The 2026 Rules

If you are asking how much can a landlord increase rent in England in 2026, the honest answer is this: there is no fixed percentage cap, but there are strict rules on how often you can raise it, how you must do it, and what happens if the tenant challenges your figure. Since the Renters’ Rights Act 2025 came into force on 1 May 2026, every assured tenancy is periodic, fixed terms have gone, and the only lawful way to increase the rent is a Section 13 notice served on the current prescribed form published on GOV.UK. Get the process wrong and your increase is simply void, you do not get the higher rent, and you have to start again.

This guide explains the limits that actually apply, walks through a worked calculation, shows you how to work out a defensible figure, and explains why a realistic number now beats an ambitious one almost every time.

Is there a legal cap on how much a landlord can increase rent?

There is no statutory percentage cap on how much a landlord can increase rent in England. You are not limited to inflation, to the Consumer Prices Index (CPI), to a multiple of the previous rent, or to any fixed figure. Despite repeated speculation during the passage of the Bill, the Renters’ Rights Act 2025 did not introduce a hard cap on rent rises.

What the law controls instead is the process and the fairness of the increase. There are four pillars:

• Frequency, the rent can be increased only once every 12 months.
• Mechanism, it must be done by a Section 13 notice (Housing Act 1988, s.13) on the current prescribed form on GOV.UK. Informal letters, emails and old rent-review clauses no longer work.
• Notice period, you must give the tenant at least two months’ notice before the new rent takes effect.
• Market fairness, the increase should bring the rent into line with comparable local market rents. If it does not, the tenant can refer the notice to the First-tier Tribunal (Property Chamber).

So while you can propose a large increase, an unrealistic figure simply invites a challenge, and as we explain below, the way the tribunal now works means an over-ambitious figure carries real downside.

Rent-review clauses are now banned. Any clause in a tenancy agreement that purports to set automatic, indexed or pre-agreed rent rises is unenforceable. The Section 13 route is the only mechanism for raising the rent on an assured periodic tenancy.

How often can a landlord increase rent?

Once per 12 months. Full stop.

You cannot stack two increases inside a year, and you cannot use a fixed-term renewal to “reset the clock”, because fixed terms no longer exist. Every assured tenancy is now a rolling periodic tenancy, so the only lever you have is the annual Section 13 notice.

A few practical points flow from the once-a-year rule:

• The 12 months runs from the date the last increase took effect, not from the date you served the previous notice.
• If you have never increased the rent on a tenancy that began before May 2026, your first lawful increase is still made by Section 13, with at least two months’ notice. The amount agreed at the start of the tenancy counts as the baseline rent, not a previous “increase”.
• A tenant agreeing informally to a higher rent does not change the rule for next time: the clock still resets on the date the new rent began.

If you try to serve a second Section 13 notice within the 12-month window, it is invalid. For a deeper look at this and other procedural traps, see our guide to an invalid Section 13 rent increase.

How much can a landlord increase rent, a worked example

There is no magic formula, but a defensible increase is one you can evidence against local comparables. Here is how a sensible calculation works in practice:

In this example the proposed rise is £100, or 10%. There is nothing inherently unlawful about 10%, what matters is whether £1,100 reflects the local market. If three nearby flats of the same size and condition let for £1,080-£1,150, the figure is defensible. A jump to £1,400 with no comparables behind it is exactly the kind of increase a tribunal will cut back.

Why you should keep your evidence

Keep a dated evidence file before you serve: screenshots of comparable listings, any letting-agent valuation, and the dates you collected them. If the tenant refers the notice to the tribunal, this evidence is what you rely on to justify your figure. Verbal “everyone round here charges more” arguments carry no weight; dated comparable listings do.

Percentage versus pounds

Tenants and tribunals think in both pounds and percentages, so it helps to frame your increase in both. A £75 rise on a £750 rent is 10%; the same £75 on a £1,500 rent is only 5%. Two increases that look identical in cash terms can read very differently as percentages, and a percentage that looks aggressive on paper invites a referral even when the cash figure is modest. Always sanity-check both numbers against your comparables.

What happens if the tenant challenges the increase?

The tenant can apply to the First-tier Tribunal (Property Chamber) before the new rent is due to start. This is the single most important change for landlords to understand in 2026, because the rules have shifted firmly in the tenant’s favour.

• The tribunal will decide the open-market rent for the property, what it would reasonably let for if offered on the open market today.
• Crucially, the tribunal cannot set the rent higher than the figure you proposed in your Section 13 notice. Under the Renters’ Rights Act 2025, your proposed rent is a ceiling, not a starting point.
• The tribunal can confirm your figure or set a lower one, but it can never set it higher.
• The new rent generally takes effect from the date set by the tribunal, and the old “backdating” risk for tenants has been removed, so referring no longer leaves a tenant worse off than if they had said nothing.

Why this asymmetry changes your strategy

Because there is no upside for over-asking, padding your figure “to leave room to negotiate” can backfire badly. The old logic, pitch high, let the tribunal split the difference, no longer applies, because the tribunal can only ever land at or below your number.

Consider two landlords on the same £1,000 flat where the true market rent is £1,100:

Landlord B gains nothing for the extra ambition and loses time, goodwill and possibly several months at the old rent while the referral is dealt with. The lesson: pitch realistically and evidence it.

How to set a rent increase that survives a tribunal

Putting the rules together, a robust increase has five characteristics:

1. It is at or below open-market rent. Anchor to dated comparables, not aspiration.
2. It is a fair step from the current rent. A single huge jump after years of no increase reads as harsh even where the market supports it; some landlords prefer steadier annual rises.
3. It is on the current prescribed form. Always download the live Section 13 form from GOV.UK on the day you serve, do not reuse an old PDF.
4. It gives at least two months’ notice and starts on a date that is at least 12 months after the last increase.
5. It is backed by evidence you have kept. If you cannot evidence it, assume the tenant might refer it.

For the full end-to-end process, see how to increase rent legally after the Renters’ Rights Act 2025 and the broader Section 13 rent increases explained guide.

Common mistakes that make a rent increase invalid

A surprising number of increases fail on procedure, not on the amount. The most common errors:

• Using an out-of-date or homemade form instead of the current prescribed Section 13 form on GOV.UK.
• Giving less than two months’ notice before the new rent is due to start.
• Trying to increase rent more than once in 12 months.
• Getting the tenant’s name, the property address, the current rent or the effective date wrong, small clerical errors can void the whole notice.
• Relying on a rent-review clause in the old tenancy agreement (now unenforceable).
• Serving by a method the tenancy agreement does not allow, or failing to allow for service time.

Any one of these can void the notice, meaning you have to start again and wait out the two-month notice period a second time, losing at least two months at the old rent. Before you send, run through our rent increase compliance checklist for England landlords.

It is also worth knowing when you even need a formal notice at all. If the tenant agrees to a new rent in writing, you may not need to serve Section 13, but the once-a-year and evidence points still matter. Our guide on a rent increase letter vs a Section 13 notice explains exactly when an informal letter is enough and when only the prescribed form is legally binding.

Free rent increase calculator: working out a defensible figure

A good rent increase calculator does two jobs at once. First, it works out the earliest lawful effective date, 12 months after the last increase, plus the two-month notice period, so you cannot accidentally breach the once-a-year rule. Second, it helps you sanity-check the new rent against the percentage change, so you can compare it to your local comparables before you commit.

To use one well:

1. Enter the current monthly rent and the date the last increase took effect.
2. Enter your proposed new rent, the tool shows the £ and % change.
3. Confirm the earliest date the new rent can lawfully start.
4. Cross-check the percentage against your comparable evidence, and adjust down if it looks aggressive.

You can try our dedicated free rent increase calculator for England landlords, built specifically around the Section 13 process and the post-RRA timing rules.

A quick worked check using the calculator logic

Say the last increase took effect on 1 July 2025 and you want to raise a £900 rent to £960.

• 12-month minimum gap: the new rent cannot start before 1 July 2026.
• Two months’ notice: if you serve on, say, 20 June 2026, the earliest valid effective date is around 21 August 2026, but it must also respect the 12-month rule, so 1 July 2026 or later is fine.
• Percentage change: £60 on £900 is 6.7%, modest, easy to evidence against comparables, and unlikely to trigger a referral.

The calculator turns those moving parts into a single confirmed date and a clear percentage, so you are not doing the arithmetic by hand under pressure.

Frequently asked questions

Is there a maximum percentage a landlord can increase rent in England?

No. There is no statutory percentage cap. The limits are on frequency (once a year), mechanism (a Section 13 notice on the current prescribed form), notice period (at least two months) and market fairness (the tenant can refer an above-market figure to the First-tier Tribunal). A 10% rise can be perfectly lawful if it reflects local market rents; a 5% rise can still be challenged if it does not.

Can a landlord increase rent every 6 months?

No. The rent on an assured periodic tenancy can be increased only once in any 12-month period, measured from the date the last increase took effect. Because fixed terms no longer exist, you cannot use a renewal to reset the clock. Attempting a second increase inside the year produces an invalid notice.

Can the tribunal raise my rent higher than I asked for?

No. This is the key change under the Renters’ Rights Act 2025. The First-tier Tribunal decides the open-market rent but cannot set it above the figure you proposed in your Section 13 notice. It can confirm your figure or set a lower one. That is why pitching an inflated number to “leave room” usually backfires.

Do I still need a Section 13 notice if my tenant agrees to the increase?

If the tenant genuinely agrees to a new rent in writing, you may be able to record it by agreement rather than serving Section 13, but the once-a-year limit and the value of dated evidence still apply, and any ambiguity is best resolved with the formal route. See our rent increase letter vs Section 13 notice guide for when each is appropriate.

What form do I use to increase the rent in 2026?

You must use the current prescribed Section 13 form published on GOV.UK. Always download the live version on the day you serve, do not reuse an old saved PDF, as using a superseded form is one of the most common reasons an increase is held invalid.

How much notice do I have to give for a rent increase?

At least two months before the new rent is due to take effect, and the effective date must also be at least 12 months after the previous increase. If either condition is not met, the notice is invalid and you must serve again.

Coming soon

Tenancy Pilot is launching soon, and our rent toolkit will pair a built-in rent increase calculator with a Section 13 Rent Increase Notice generator, so you can work out a defensible figure, confirm the earliest lawful effective date, and produce a notice on the current prescribed form without solicitor fees. The calculator feeds straight into a ready-to-serve notice, with deadline reminders in the dashboard so you never breach the once-a-year rule.

Join the waitlist to be first to use it when we launch.

This article is general information, not legal advice. Always check the current rules and prescribed forms on GOV.UK and legislation.gov.uk, and consult a solicitor about your specific circumstances.