Interrogating the Landlord's Numbers: A Tenant's Guide to Commercial Service Charge Audits

Service charge disputes rarely turn on the size of the demand. They turn on evidence, deadlines and the quality of the paper trail. A tenant that has the lease clause, the reconciliation and a dated written challenge in the right sequence will usually do better than one that simply objects to the total.

This guide sets out how the mechanism works, what an occupier can reasonably ask to see, where the recurring errors sit, and how to run a challenge as a governed decision rather than an indignant email.

The mechanism, briefly

Most commercial leases operate a two-stage structure. The tenant pays an interim charge on account, usually quarterly, based on the landlord's budget for the service charge year. At the end of that year the landlord certifies the actual expenditure, applies the tenant's apportionment, and issues a reconciliation showing either a balancing charge or a credit. That certified sum is the final charge for the year, subject to whatever challenge rights the lease provides.

The lease is the source of truth. It defines what is recoverable, how the tenant's share is calculated, whether there is a cap, and what the landlord must produce and when. The RICS professional statement on service charges in commercial property sets out expected standards of transparency and consultation, and is persuasive even where the lease is thin — but it does not override the lease.

Begin with the lease, not the invoice

Before querying a figure, pull the relevant clauses and answer four questions. What categories of cost are recoverable? Is there a cap, a fixed charge or an indexation mechanism? What is the apportionment method — floor area, rateable value, or a fixed percentage — and has it changed? And what exactly is the landlord obliged to provide, and within how many months of the year end?

Answer those first and most disputes become considerably narrower. Many queries that feel like overcharging turn out to be a recoverable item the lease permits, applied to an apportionment percentage nobody has reviewed since the last rent review.

What you can reasonably ask to see

Strictly, the right to inspect the landlord's accounts is whatever the lease grants. In practice, managing agents expect to provide a reconciliation summary, a breakdown by cost heading, and evidence for material items. A reasonable request covers:

• The certified reconciliation and the budget it is measured against
• Invoices or redacted supplier contracts for the largest cost lines
• The apportionment calculation and floor areas used
• The management fee calculation and its contractual basis
• Insurance premium documentation where insurance is recovered separately
• Any reserve or sinking fund account statement, and how it is treated in the year's charge

Ask for these once, in writing, with a stated response date. Repeated ad hoc requests weaken your position and slow the process.

Five errors that recur

Management fees applied to the wrong base. Percentage fees are sometimes calculated on total expenditure including items the lease excludes, or charged twice across budget and reconciliation.

Capital work dressed as repair. A full roof replacement is not a patch repair. The usual test is whether the work restores or improves; leases differ on whether improvements are recoverable, and many require recovery to be spread over the useful life of the asset.

Void unit costs. Where the landlord's own vacant units generate service costs, some leases exclude the landlord's share of those costs entirely; others do not. Read the clause rather than the invoice.

Apportionment drift. Percentages drift after a fit-out changes the floor area, after a sub-letting, or where a new unit is added to the estate without the schedule being updated.

Late or absent reconciliation. A balancing charge issued well after the contractual deadline is open to challenge on timing alone, and a year that is never reconciled should be pursued rather than forgotten.

Who owns the challenge internally

Assign one owner — typically the finance director with the property or facilities lead supporting. Agree in advance the spend authority for professional advice, the settlement threshold that requires board or partner approval, and the position on paying while disputing. In most cases the undisputed portion should be paid on time; withholding the whole charge invites interest, and in the worst case forfeiture action, for the sake of a modest adjustment.

Every challenge should be recorded: date received, date queried, evidence requested, response received, decision taken, and who approved it. That record is what turns a one-off complaint into a position that holds at escalation.

The challenge letter that does the work

Keep it to a page and a half. Identify the property and the service charge year. State which costs are disputed and on what basis — lease clause, absent evidence, arithmetic error or apportionment. Set out what you have requested and when. State what you propose: credit, re-issue of the reconciliation, or referral to the lease's dispute mechanism. Reserve your rights expressly, and date it. Vague correspondence is easy to park; specific correspondence is not.

Deadlines and deemed acceptance

Many leases contain a provision that the certified reconciliation is conclusive unless challenged within a fixed period — commonly three months from service of the certificate, sometimes shorter. Miss it and the argument is usually over, regardless of merit. Diarise the date as soon as the certificate arrives, and note that a query raised inside the window preserves the position even if the substantive negotiation runs on for months.

Escalation, and when it is worth it

Progress in sequence: managing agent, landlord's property manager, then the dispute mechanism in the lease — expert determination, arbitration or court. Expert determination is generally faster and cheaper for a quantified disagreement about recoverable costs; arbitration and litigation are for questions of construction. An independent surveyor's report is often the cheapest way to establish whether a challenge has substance, and it can be shared before any formal step is taken.

Set a cost ceiling before you start. If the disputed sum is a few thousand pounds and the professional fees are similar, a firm written challenge and a negotiated credit is the rational endpoint. Reserve escalation for recurring errors, large capital items or a landlord who will not produce evidence at all.

Reducing next year's exposure

Scrutinise the budget at the interim stage, when the landlord is still consulting and change is cheap. Accrue for the balancing charge through the year rather than meeting it in one hit. Review apportionment at each rent review and lease renewal, and negotiate a cap, an audit right and a defined timetable for reconciliation while you still have leverage. The Leasehold and Freehold Reform Act 2024 addresses residential service charges; commercial occupiers will find no relief there, which makes the lease terms and the paper trail the only real protections.

The pattern across most disputes is the same: the tenant who reads the lease, requests evidence once, records the decision and diarises the deadline rarely needs to escalate at all.