Can a Landlord Increase Rent During a Fixed Term Tenancy?

Expert legal guidance on rent increases, tenant protections, and when changes are lawful under English housing law.

Understanding Rent Increases During a Fixed Term

Rent increases are one of the most common causes of disputes between landlords and tenants. Many tenants worry that rent can be increased at any time, while many landlords assume they have broad discretion to adjust rent when market conditions change.

In reality, rent increases during a fixed term tenancy are tightly regulated. In most cases, a landlord cannot increase the rent during a fixed term unless specific legal conditions are met.

This article explains:

• When rent increases are lawful during a fixed term
• What tenancy agreements must say for an increase to be valid
• What tenants can do if rent is increased unlawfully
• The risks landlords face when rent increases are imposed incorrectly

What Is a Fixed Term Tenancy?

A fixed term tenancy is a tenancy agreement that runs for a set period of time, most commonly:

• 6 months
• 12 months
• Occasionally longer fixed terms

During the fixed term:

• The rent is usually fixed
• The tenant has a contractual right to remain
• The landlord’s ability to change terms is restricted

Unless the tenancy agreement expressly allows it, the rent cannot be changed mid-term.

The General Rule: No Rent Increase During a Fixed Term

As a starting point:

A landlord cannot increase rent during a fixed term unless the tenancy agreement permits it.

This rule exists to provide certainty and stability. Tenants are entitled to know what they will be paying for the duration of the contract they agreed to.

Any attempt to impose a rent increase without legal authority may be:

• Contractually invalid
• Unenforceable
• Potentially linked to harassment if pressure is applied

When Can a Landlord Increase Rent During a Fixed Term?

There are limited scenarios where a rent increase may be lawful.

1. A Rent Review Clause in the Tenancy Agreement

The most common lawful route is a rent review clause.

For a rent review clause to be enforceable, it must:

• Be clearly written in the tenancy agreement
• Specify when rent can be reviewed
• Explain how the new rent will be calculated
• Avoid vague or unfair wording

A clause that simply says “rent may be increased” is usually insufficient. If the clause is unclear or unfair, it may be challenged.

2. Agreement by the Tenant

A rent increase can take effect if:

• The tenant freely agrees to it
• The agreement is genuine and not made under pressure
• The change is documented, usually by a written variation or new agreement

A tenant cannot be forced to agree. Threats of eviction or pressure tactics may render the agreement invalid and expose the landlord to legal risk.

3. A New Tenancy Agreement Is Signed

If both parties agree to:

• End the existing fixed term early, and
• Enter into a new tenancy agreement

Then the rent may be changed as part of the new contract. This must be voluntary. A landlord cannot unilaterally end a fixed term to impose higher rent.

What About Section 13 Rent Increases?

A Section 13 notice (Housing Act 1988) is often misunderstood.

Important clarification:

• Section 13 cannot be used during a fixed term
• It only applies once the tenancy has become periodic

Any attempt to use Section 13 during a fixed term is invalid.

What Happens When the Fixed Term Ends?

Once the fixed term expires, the tenancy usually becomes:

• A statutory periodic tenancy, or
• A contractual periodic tenancy

At that point, rent increases may be possible via:

• Section 13 notices
• Agreement between the parties
• A new fixed term agreement

Different rules apply, and mistakes at this stage are common.

Unlawful Rent Increases and Tenant Rights

If a landlord attempts to increase rent unlawfully during a fixed term, tenants are not required to comply.

Tenants may:

• Continue paying the original rent
• Challenge the increase in writing
• Seek legal advice
• Defend possession proceedings if eviction is threatened

An unlawful rent increase does not justify eviction or penalties.

Risks for Landlords Who Increase Rent Incorrectly

For landlords, getting this wrong can have serious consequences.

Potential risks include:

• Rent arrears claims failing
• Section 21 notices being challenged if linked to pressure
• Allegations of harassment
• Damage to possession proceedings
• Legal costs and delays

Courts closely examine whether landlords have acted reasonably and lawfully when rent disputes arise.

Common Mistakes We See in Practice

Some of the most frequent issues include:

• Assuming rent can be increased “because the market has changed”
• Relying on vague or poorly drafted rent clauses
• Issuing Section 13 notices during fixed terms
• Applying pressure to force agreement
• Confusing fixed term and periodic tenancy rules

These errors often escalate simple disputes into litigation.

How This Affects Possession and Eviction

Rent disputes frequently intersect with possession claims.

An unlawful rent increase can:

• Undermine arrears calculations
• Provide tenants with defences
• Delay or defeat eviction proceedings
• Increase exposure to counterclaims

Ensuring rent changes are legally sound is essential before taking enforcement action.

Final Thoughts

Rent increases during a fixed term tenancy are not straightforward. The law prioritises contractual certainty and tenant protection, meaning landlords must act strictly within the rules.

Both landlords and tenants benefit from understanding:

• What the tenancy agreement actually allows
• Whether consent is required
• When statutory mechanisms apply
• The consequences of getting it wrong

Early advice often prevents disputes from escalating.

Contact Us

Disputes over rent increases frequently arise alongside possession claims, tenancy renewals, and allegations of unfair treatment.

If you are:

• A landlord unsure whether you can lawfully increase rent, or
• A tenant facing a rent increase you believe is unlawful

our housing law team can assess your position, review your tenancy agreement, and provide clear advice on your rights and risks.

Contact Knights & Shah Solicitors for a confidential assessment of your housing matter.