The New Rent Rules: Why Landlords Need a Smarter Income Strategy

Most landlords in England do not increase rent arbitrarily. They raise it when their mortgage costs go up, when a big repair bill lands, or when a tenancy comes to the end of a fixed term and the market has moved. Under the old system, that flexibility — informal, often undocumented, sometimes reactive — was perfectly legal. The new system is not designed for that way of working.

This is Article 2 in our three-part series on the Renters' Rights Act 2025, which came into force in England on 1 May 2026. This article focuses specifically on rent: how increases are now regulated, what the risks are of getting it wrong, and what a smarter approach to rental income looks like in the new environment. If you have not read Article 1 on possession rights and Section 8 grounds, it is worth doing so — but this article is designed to stand alone.

The core shift: Rent increases are now a formal, documented, annual process — not an informal conversation or a clause in a tenancy agreement. And tenants have a straightforward mechanism to challenge increases they believe are above the market rate.

What Has Changed: The Section 13 Notice

Under the Renters' Rights Act, landlords in England can only increase the rent of an assured periodic tenancy once per year, using a formal Section 13 notice. This is not merely best practice — it is the only legally valid route. Any rent review clauses written into tenancy agreements before 1 May 2026 are now void. You cannot agree a rent increase informally over the phone or by email and simply start charging more.

The notice requires two months' written warning before the new rent takes effect. It must be served on the prescribed form. And any proposed increase must not exceed the market rent for the property — the rate that a newly advertised equivalent property would achieve.

If a tenant believes the proposed increase exceeds the market rate, they can challenge it at the First-tier Tribunal (Property Chamber) for a fee of just £47. The Tribunal will assess what the market rent actually is — and can only confirm the proposed amount or set it lower, not higher. Even if your increase is entirely reasonable, a challenge will delay when the new rent takes effect until the Tribunal issues its determination.

The Bidding War Ban

For landlords letting properties at the top of the market, or in high-demand areas, there is a further change worth understanding. The Act bans rental bidding wars. Landlords and agents cannot accept offers above the advertised asking rent, and cannot encourage or invite tenants to bid against each other for a property. Tenants can only be asked to pay the advertised rent. Councils have the power to fine landlords and agents who break this rule.

In practice, this affects landlords who have been accustomed to setting a slightly lower asking rent and relying on competitive demand to push the final agreed figure higher. Going forward, the price you advertise needs to reflect what you actually intend to charge.

Why Predictable Income Now Matters More Than Peak Rent

The single most important financial shift for landlords in the new environment is the move from chasing maximum rent to managing for reliable net income. These are not the same thing, and the difference matters.

A property generating £1,800 per month but with two months of void periods per year, one months' arrears, and two Tribunal delays on rent increases delivers substantially less to a landlord than a property generating £1,650 per month with zero voids, consistent payment and predictable annual increases. The headline rent is not the bottom line.

The levers that most directly affect net income for a landlord in England in 2026 are:

1. 1Void periods. An empty property earns nothing, costs in council tax (now a landlord's liability in many cases for vacant lets), and delays any income recovery. Reducing voids through good tenant retention is now more valuable than ever.
2. 2Rent arrears. Under the new Section 8 regime, recovering possession from a non-paying tenant is a court process that takes months and is not guaranteed. Prevention — through thorough referencing and early intervention — is significantly cheaper than cure.
3. 3Maintenance costs. The Act places new obligations on landlords around repair timescales (and will extend Awaab's Law — strict deadlines for addressing damp and mould — to the private sector in a later phase). Reactive maintenance is more expensive than planned maintenance, and failure to respond promptly to repair requests now carries both financial and legal risk.
4. 4Tribunal delays. If you push rent increases aggressively, expect challenges. Price each increase carefully, document your market evidence, and factor in the possibility of a delay before the new rent takes effect.
5. 5Management time. Time spent chasing tenants, attending to maintenance, keeping records and responding to Section 8 paperwork is not free, even if landlords do not price it. As compliance complexity increases, the real cost of self-management rises.

Comparing Approaches: What "Net Income" Really Means

Where Guaranteed Rent Fits — Honestly

One solution some landlords are exploring more seriously following the Act is the guaranteed rent or company let model, where a professional property management company leases the property directly from the landlord and pays a fixed monthly amount regardless of whether the underlying rooms or units are occupied or whether individual tenants are paying on time.

It is worth being honest about what this model does and does not offer.

It does not typically deliver the highest possible headline rent. A professional operator will price the agreement to cover their own costs and margin, and the guaranteed amount will usually sit at or slightly below open-market levels. The commercial proposition is not "more money" — it is predictable money. No voids, no arrears, no Tribunal delays on your income. The operator absorbs those risks in exchange for the margin they build into the arrangement.

For landlords whose primary concern is cash flow predictability — particularly those with mortgaged properties where the monthly payment is fixed — that trade-off can make considerable commercial sense. A guaranteed £1,600 per month every month is a materially different financial position from a theoretical £1,800 per month with unpredictable gaps.

As with all such arrangements, the details matter enormously. The lease terms, the operator's track record, the mortgage and insurance conditions, the local authority rules for the type of occupancy intended — all need careful scrutiny before committing. But as a concept, it addresses precisely the income predictability problem that the new rent regime creates for landlords who have relied on informal management and reactive increases.

The bottom line: The Act does not cap rents. But it changes the mechanics of increasing them in a way that rewards landlords who plan carefully and penalises those who manage reactively. The question is not just "how much can I charge?" but "how reliably can I collect it, and what does it cost me to do so?"