How much can a landlord increase rent by in 2026?

How much can a landlord increase rent by in England? There is no percentage cap. The real limit is the market: if your tenant challenges a Section 13 notice, the tribunal sets the rent at what the property would fetch on the open market on the same terms, and it can never set it higher than the rent you proposed.

Is there a cap on rent increases in England?

The rules we check against set no fixed percentage or cash limit on a rent increase for a private assured tenancy. The rent increase limits are about how and when you increase the rent, not how much:

Limit	What it means
The form	You must use Form 4A, the Section 13 notice. Rent review clauses have no effect since 1 May 2026
Notice	The new rent starts at least two months after you serve the notice
Frequency	Once a year: 52 weeks after the tenancy began or the last increase took effect, sometimes 53
Start date	The new rent must start on the first day of a rent period
The tenant's challenge	The tenant can ask the tribunal to set the rent at the open-market level

These rules apply in England only. Wales (Renting Homes (Wales) Act 2016), Scotland and Northern Ireland have different law.

What is a reasonable rent increase?

A reasonable rent increase is one that takes the rent to, or below, the current market rent for your property. That's the test the tribunal uses if the tenant challenges: the rent you "could reasonably expect if the property were let on the open market on the same terms". The tribunal may also consider the property's condition.

In practice that means three things shape a reasonable figure:

• Comparable lets. What similar homes nearby are letting for now.
• Condition. A property needing repairs won't command the same rent as a well-kept one.
• Terms. The same terms as your tenancy, for example whether it's furnished and whether any bills are included in the rent.

Your own costs, such as a higher mortgage payment or insurance premium, aren't part of the test. They may be why you want an increase, but they don't decide what the tribunal will allow. Our guide to market rent evidence shows how to build the comparison.

The maximum rent increase the tribunal will allow

If the tenant applies to the First-tier Tribunal, the outcome is the lower of two figures: your proposed rent and the open-market rent. The tribunal can never exceed your proposal (Housing Act 1988 s.14ZB(5)).

Current rent	You propose	Tribunal finds market rent of	New rent
£1,000	£1,150	£1,100	£1,100
£1,000	£1,150	£1,200	£1,150
£1,000	£1,050	£1,100	£1,050

So the maximum rent increase you can achieve is the one you propose, and only if the market supports it. Proposing less than the market rent can't be corrected upwards by the tribunal.

Why asking for too much costs you

Over-pricing an increase has costs that a well-evidenced figure avoids.

• A challenge is more likely. A figure well above comparable lets gives the tenant a reason to apply on form MR1.
• You wait for the money. The tenant does "not have to pay the new rent amount until the tribunal has made its decision".
• No backdating. The increase never starts before the date in your notice. If the tribunal decides after that date, the new rent starts at the beginning of the first rent period on or after its decision.
• Hardship deferral. If the usual start would cause the tenant undue hardship, the tribunal can move it to a later date, within two months beginning with the date of its decision.
• The result is capped anyway. Even after a hearing, the most you get is the market rent.

A figure backed by evidence gives the tenant less reason to challenge. Read how a tenant challenges a rent increase for the full process.

Rent limits at the start of a new tenancy

The Section 13 rules cover increases during a tenancy. When you let to a new tenant, different rules shape the starting rent:

• Rental bidding is banned. Every written advert or offer must state one specific rent, and you can't ask for or accept offers above it. See the rental bidding ban.
• Rent in advance is limited for tenancies entered into from 1 May 2026. Before the tenancy is agreed you can't ask for or accept any rent, although a holding deposit of up to one week's rent is still allowed. See rent in advance rules.
• The tenant can challenge the starting rent. Within 6 months of the tenancy starting, the tenant can ask the tribunal to review the current rent. The tribunal can only reduce it, to the market rent.

How much can a landlord increase rent without inviting a challenge?

Use this checklist before you fill in Form 4A:

1. Find at least a handful of comparable lets: same area, similar size and type, similar condition.
2. Adjust for differences: furnishing, parking, outside space, bills included.
3. Be honest about condition. If there's outstanding disrepair, fix it first or price it in.
4. Write down your reasoning and keep copies of the adverts or valuations you relied on.
5. Check the date rules with the Section 13 date calculator.
6. Make sure you're allowed to increase now: read how often rent can be increased.

What to do next

• Prepare Form 4A with the start date worked out for you, free with a ValidNotice account, from the Section 13 notice page.
• Send a short rent increase letter with the form to explain your figure.