Mandatory possession ground

Not every possession ground gives a court room to weigh the tenant's side of the story. If a landlord proves a mandatory ground, the court has no choice — and the Renters' Rights Act 2025 just made the main one harder to reach, and fairer to reach.

What is the difference between a mandatory ground and a discretionary ground?

If a landlord proves a mandatory ground, the First-tier Tribunal or county court must grant possession — there is no further balancing exercise. If the ground relied on is discretionary instead, the court must also be satisfied that it is reasonable to grant possession, weighing the tenant's circumstances alongside the landlord's case. The same set of facts can sometimes support more than one ground, so it matters which one the landlord actually relies on and proves.

Is rent arrears a mandatory ground?

Ground 8 — serious rent arrears — is a mandatory ground, and was amended by the Renters' Rights Act 2025. Under the amended wording, the arrears threshold rises from eight to thirteen weeks' rent for tenancies with weekly or fortnightly rent, and from two to three months' rent for monthly tenancies, both at the date the notice is served and at the date of the hearing. The Act also added a specific rule that arrears caused only by a delay in receiving a Universal Credit housing payment are disregarded from the calculation.

Why would the Universal Credit disregard matter?

Without it, a tenant waiting on a Universal Credit housing-element payment that had simply not yet arrived could be pushed over the mandatory arrears threshold through no fault of their own, and face a possession order the court would have no discretion to refuse. The disregard specifically removes arrears that exist only because of that payment delay from the Ground 8 calculation, so the mandatory threshold reflects genuine non-payment rather than a processing delay.

Did the Renters' Rights Act 2025 change which grounds are mandatory?

Yes, substantially. Schedule 1 to the Act restructured the list of grounds for possession under the Housing Act 1988: it repealed the old Ground 3, renumbered the old Ground 16 as Ground 5C, and inserted a number of new grounds. The changes took effect on 1 May 2026. Exactly which of the newly inserted grounds are mandatory and which are discretionary, beyond the amended Ground 8, needs checking against the current legislation for any specific ground you are relying on or facing.

Does a mandatory ground mean the tenant has no defence at all?

No. A tenant facing a mandatory ground can still dispute whether the ground is actually made out on the facts — for example, disputing the arrears figure itself, or whether the correct notice was given with the correct notice period. What a mandatory ground removes is the court's discretion to refuse possession once the ground is proved; it does not remove the tenant's ability to argue the ground has not been proved at all.

Mandatory versus discretionary

Schedule 2 of the Housing Act 1988 lists the grounds on which a landlord can seek possession of an assured tenancy, and splits them into two kinds. A mandatory ground, once the landlord proves it to the court's satisfaction, leaves the court with no discretion: it must grant possession. A discretionary ground is different — even if the landlord proves the ground, the court must go on to decide separately whether it is reasonable to grant possession in the circumstances, which can involve weighing the tenant's personal situation, the impact of eviction, and the landlord's own reasons for wanting possession.

This distinction matters enormously in practice. A tenant facing a discretionary ground has room to argue that, even if the landlord's case is technically made out, possession should not be granted, or should be suspended or made conditional. A tenant facing a mandatory ground does not have that argument available — their defence has to focus on whether the ground is actually proved on the facts at all, not on whether possession would be fair.

The best-known mandatory ground is Ground 8, for serious rent arrears, and the Renters' Rights Act 2025 amended it directly. Paragraph 24 of Schedule 1 to the Act raised the threshold from eight weeks' rent to thirteen weeks' rent for tenancies with weekly or fortnightly rent, and from two months' rent to three months' rent for tenancies with monthly rent — both figures measured at the date the notice is served and again at the date of the hearing, as Ground 8 has always required. The same amendment added a specific disregard: where a tenant is entitled to a Universal Credit housing payment, any arrears that exist only because that payment has not yet been received are ignored when working out whether the Ground 8 threshold is met. These changes came into force on 1 May 2026, under the Renters' Rights Act 2025 (Commencement No. 2 and Transitional and Saving Provisions) Regulations 2026.

Beyond Ground 8, Schedule 1 made wider changes to the list of grounds: it repealed the old Ground 3, renumbered the former Ground 16 as Ground 5C, and inserted several new grounds into Schedule 2. Anyone relying on, or facing, a ground other than the amended Ground 8 should check the current text of Schedule 2 directly, since the renumbering means older guides that refer to grounds by their pre-2025 numbers may no longer match.

A tenant pays rent monthly. Her Universal Credit housing element is delayed by the DWP for seven weeks due to a processing backlog, during which two months' rent falls into arrears that would otherwise be covered by that payment. Once the backlog clears, the payment is made and the arrears are reduced to six weeks' worth of genuine non-payment.

Total arrears at one point

Caused only by UC payment delay

Disregarded under the 2025 amendment

Genuine arrears once disregard applied

Ground 8 (mandatory) made out?

Because the arrears attributable to the Universal Credit delay are disregarded, the genuine arrears fall short of the three-month mandatory threshold. The landlord could potentially still pursue a discretionary ground on a lower arrears figure, but the court would then have to consider whether possession is reasonable in the circumstances — a very different, and less certain, path for the landlord than Ground 8 would have offered.

Grounds for possession

Renters' Rights Act 2025

Housing Act 1988, Schedule 2

Renters' Rights Act 2025, Schedule 1

The Renters' Rights Act 2025 (Commencement No. 2 and Transitional and Saving Provisions) Regulations 2026

Mandatory Possession Ground — Renters' Rights Glossary

What a mandatory possession ground is, how it differs from a discretionary ground, and how the Renters' Rights Act 2025 changed the rent arrears ground.