How is my leasehold service charge calculated?

Your service charge is usually calculated as a proportionate share of the total building costs. This is often based on your flat's floor area relative to the total building size or a fixed percentage stated in your lease.

What is a reasonable service charge in the UK for 2026?

The UK average annual service charge is approximately £2,300, but this varies wildly based on services like lifts, concierge, and building age. Our calculator helps benchmark your specific costs against these averages.

Can I challenge an unreasonable service charge?

Yes, leaseholders have the right to challenge service charges at a First-tier Tribunal (Property Chamber) if they believe the costs are not 'reasonably incurred' or the works are not of a reasonable standard.

Leasehold Service Charge Calculator UK 2025/26

Tell us about your building

We use this to calculate your proportionate share and benchmark against comparable UK properties.

Total flats in building

All residential units in your block.

Your flat's floor area

sq ft

Check your lease or Land Registry title.

Total building floor area

sq ft

Or enter your apportionment % directly below.

Your apportionment (optional)

Overrides the floor area if entered.

Building age

Older buildings typically carry higher maintenance costs.

What services does your building have?

Tick everything that applies. We use typical UK cost benchmarks for each to estimate your building's total annual spend.

Management feesManaging agent or freeholder admin Buildings insuranceFreeholder-arranged — premiums have risen sharply Communal cleaningHallways, stairwells, communal areas Grounds maintenanceGarden, landscaping, car park Lift maintenanceAnnual service contract and call-outs Communal electricityLighting, door entry, CCTV power Fire safety complianceAlarms, emergency lighting, risk assessments Repairs & reserve fundSinking fund for major future works Concierge / door staffFull or part-time — significant cost

Your current annual service charge (optional)

If entered, we compare your actual charge directly against the benchmark.

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Within normal range

Your charge looks reasonable

Based on your building type, size and services, your charge is within the expected range for comparable UK properties.

Estimated charge

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Your share

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UK average

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Monthly

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Compared to UK typical range

UK avg

£0 £5,000+

Service	Your share

Your rights as a leaseholder

This calculator provides an estimate based on typical UK benchmarks and is for illustrative purposes only. It does not constitute legal or financial advice. If you believe your service charge is unreasonable, you may apply to the First-tier Tribunal (Property Chamber). Contact the Leasehold Advisory Service (LEASE) at lease-advice.org for free independent advice.

Region

Annual avg

London

£3,400

South East

£2,600

South West

£2,100

East of England

£2,000

Midlands

£1,800

North West

£1,650

Yorkshire

£1,550

North East

£1,450

How this Service Charge Calculator works

Service charges are not arbitrary figures; they are legally bound by the terms of your lease and the Landlord and Tenant Act 1985. This tool uses three primary data points to provide your benchmark:

1. The Proportionate Share (Apportionment)

Most modern leases calculate your share based on the Relative Floor Area of your flat compared to the total internal area of the building. If your flat is 750 sq ft and the building is 9,000 sq ft, you are responsible for 8.33% of the total costs. Older leases may use a fixed percentage or "rateable value."

2. Benchmark Costing

We apply 2025/26 UK averages for core services. For example, management fees typically range from £300 to £500 per unit, while buildings insurance has seen a sharp 20-30% increase recently due to updated fire safety assessments.

Common Pitfalls & The "80-Year Cliff"

While this calculator focuses on annual costs, leaseholders must be aware of the "Value Trap."

The 80-Year Rule: If your lease term drops below 80 years, the cost to extend it increases significantly due to "Marriage Value" (though the 2024 Reform Act aims to phase this out, it remains a critical factor in 2026 valuations).

Section 20 Notices: If a single repair cost exceeds £250 per flat, the freeholder must follow a formal consultation process. If they don't, they may be legally capped at recovering only £250 from you.

Sweeping Clauses: Beware of vague language in your lease that allows landlords to charge for "improvements" rather than just "repairs." Improvements are often not recoverable under standard service charge headings.

Next Steps: What to do if your numbers look wrong

If our calculator shows your charge is significantly above the UK average, you have three professional routes to take:

1. Specialized Surveyor

Best for: Technical Disputes. A surveyor can audit the building to see if the "Major Works" proposed are actually necessary or if the costs are inflated.

2. Property Solicitor

Best for: Legal Breaches. If the freeholder isn't following the "Summary of Rights" or the lease terms, a solicitor can prepare a case for the First-tier Tribunal (Property Chamber).

3. Right to Manage (RTM)

Best for: Long-term Control. If the management is consistently poor, you and your neighbors can legally take over the management of the building without buying the freehold.

Is your service charge reasonable?