A commercial cleaning contract should set out scope inclusions and exclusions in writing, an audit and corrective-action process, named response times, and a pricing model you can compare against other quotes on a like-for-like basis. If any of those four are missing, or only exist as a verbal assurance from a sales call, you are not comparing contracts, you are comparing prices. This guide sets out what a proper cleaning specification covers, how to structure the service levels around it, how the common pricing models actually differ, and what to check before you shortlist a provider.

A commercial cleaning contract should set out scope inclusions and exclusions in writing, an audit and corrective-action process, named response times, and a pricing model you can compare against other quotes on a like-for-like basis. If any of those four are missing, or only exist as a verbal assurance from a sales call, you are not comparing contracts, you are comparing prices. This guide sets out what a proper cleaning specification covers, how to structure the service levels around it, how the common pricing models actually differ, and what to check before you shortlist a provider.

What your cleaning specification should include

The specification, not the quote, is the actual contract. It is the document you audit against for the life of the agreement, so vague language here becomes a dispute later. A specification written properly states site, frequency, task and standard for every area, not a general description of "office cleaning" or "daily service."

Scope inclusions, written down

A workable specification lists, by area:

• Daily routines by zone: desks, washrooms, kitchens, breakout areas, reception, and the frequency each is cleaned (once daily, twice daily, on a rota).
• Washroom servicing and consumables, including who restocks and on what cycle, so the building is never caught out mid-week.
• External and communal areas where relevant: entrance mats, external glazing at ground level, bin stores, stairwells and lift lobbies for multi-occupancy or housing sites.
• Periodic and deep cleans scheduled into the year: carpet and hard floor care, high-level cleaning, washroom deep cleans. These should sit in the annual plan as a budgeted item, not appear as a surprise invoice partway through the contract.
• Out-of-hours or specialist provision if the site needs it: post-event cleans, biohazard response, or work requiring IPAF or PASMA-trained access for ceilings, light fittings and ductwork.
• A site-specific COSHH (Control of Substances Hazardous to Health) assessment for any chemical-based deep clean, since cleaning products fall within the same hazardous-substances framework the Health and Safety Executive applies to any workplace chemical, and the assessment should be named in the specification rather than assumed to exist somewhere in the background.[4]

Scope exclusions, written down just as explicitly

Most disputes on cleaning contracts come from what was assumed rather than what was agreed. The specification should state, in the same document, what is not included: window cleaning above ground floor unless separately quoted, specialist floor restoration, event or one-off cleans, and any consumables the client supplies rather than the contractor. A routine daily contract and a one-off post-construction or post-refurbishment clean are different services with different methods and pricing, and a specification that blurs the two makes both hard to cost accurately. If you are weighing up a routine contract against a one-off builders clean or a pre-handover sparkle clean, Builders Clean vs Sparkle Clean sets out how those scopes differ and when each applies, which is useful reading before you write the exclusions list.

Structuring SLAs and KPIs that actually work

A service level agreement (SLA) is only useful if it is measurable and the measurement is written into the contract, not left to be agreed later. Three elements matter most for a cleaning contract specifically.

Audit frequency

State how often the site is audited against the specification, by whom, and on what basis. A weekly, spec-based audit against the written standard is a reasonable baseline for a commercial contract; healthcare and other risk-graded environments need audit frequencies matched to that risk rating rather than a single generic figure. Ask whether the audit is carried out by the same team delivering the clean (self-audit) or by a separate account manager, since the second gives you an independent check rather than marking your own homework.

Corrective-action tracking

An audit that identifies a gap is only half the job. The contract should specify what happens next: a corrective action is raised, assigned an owner, and tracked to closure, with the closure evidenced rather than just logged as complete. Ask to see a sample corrective-action report before you sign, not just a description of the process.

Response times

Reactive requests (a spill, a washroom running low, an urgent one-off) need a stated target response time, not "as soon as possible." Ask for the specific figure in hours, what counts as the clock starting, and whether it differs for urgent versus routine requests. The UK government's own approach to major supplier contracts is instructive here: departments are required to publish a small number of the KPIs they consider most material to contract performance, rather than a long list nobody actually monitors, and to rate supplier performance against them on a defined scale.1] A cleaning contract does not need to replicate a central government reporting regime, but the same principle applies at any scale: agree a handful of KPIs that matter, define them precisely, and report against them consistently rather than producing a headline "satisfaction score" with nothing underneath it. Buyer expectations on this kind of reporting have moved on in the last two years, and [UK Cleaning and Facilities Management Trends 2026 sets out where that shift is heading if you are benchmarking your own tender against current practice.

Comparing pricing models on a like-for-like basis

Cleaning quotes rarely fail on price alone. They fail because two providers have priced different things under the same headline figure. There are three common models.

Fixed price

A single price for a defined scope, usually monthly or annually. This gives budget certainty and is the most common model for routine daily contracts with a stable scope. The risk sits with the provider if the job takes longer than planned, which means the fixed price only holds if the scope it was based on is accurate and complete, which is exactly why the written specification matters more here than anywhere else.

Schedule of rates

A price per unit of work (per hour, per square metre, per visit) rather than one lump sum. This suits sites with variable or unpredictable workload, or where the buyer wants visibility of what each task actually costs, but it puts the burden on the buyer to estimate volume accurately and to audit invoiced hours or units against what was actually delivered.

Cost-plus (open book)

The contractor recovers actual cost (labour, consumables, overhead) plus an agreed management fee or margin. This model gives the most transparency into where the money goes and suits complex or evolving contracts, but only works if the client has the resource to review open-book accounts regularly, and the agreed margin needs to be clear from the outset rather than negotiated after costs have already been incurred.

Making the comparison fair

To compare quotes on a like-for-like basis, normalise them against the same specification, the same frequency, the same consumables assumption, and the same periodic-clean schedule before comparing the headline figure. A lower price against a thinner specification is not a better deal, it is a different contract. Crown Commercial Service's own guidance for writing procurement specifications makes the same point from the buyer's side: a specification should be built from what the requirement actually is, not copied from a previous contract or reverse-engineered from a target price, precisely so that competing quotes can be assessed against the same defined scope.[2]

Evaluating and shortlisting providers

Once quotes are back and normalised against a common scope, the shortlisting decision comes down to four checks.

Accreditations. Look for alignment with British Institute of Cleaning Science (BICSc) training standards, which set the industry benchmark for cleaning competency through its Licence to Practice and skills framework, and for a certified quality management system such as ISO 9001.[3] The British Cleaning Council, the umbrella body for the UK's cleaning, hygiene and waste sector, is a useful reference point for the standards and training routes a credible provider should be able to point to.[5] Accreditation alone does not guarantee delivery, but its absence on a commercial cleaning tender is worth asking about directly.

Vetting. For any site with under-18s, vulnerable adults, or restricted access, confirm the provider runs DBS checks on cleaning teams and can evidence it, not just assert it. Right-to-work checks should be standard practice regardless of sector.

Insurance. Confirm public liability and, where teams work on your premises, employer's liability cover at a level appropriate to the site, and ask for the certificate rather than a verbal confirmation.

References and evidence of delivery. Ask for a reference from a comparable contract, ideally one running over multiple years rather than a single project, and ask specifically about audit consistency and how corrective actions were handled, not just general satisfaction. AOG's cleaning contract for 60 Costa Coffee stores ran to the same written specification on every site over three years, audited weekly, with zero reportable accidents across the programme, which is the kind of multi-year, multi-site evidence worth asking any shortlisted provider to match.

Red flags in cleaning tenders

A handful of patterns are worth treating as warning signs rather than minor gaps:

• A quote with no written specification attached, only a price and a start date.
• No stated audit frequency, or an audit process the provider cannot describe in specific terms when asked.
• Periodic and deep cleans absent from the quote entirely, which usually means they arrive later as unbudgeted add-on costs.
• No named response time for reactive requests, or a response time that is not written into the contract.
• Reluctance to provide a reference contactable directly, or references limited to short-term or single-site work only.
• Accreditation claimed but not evidenced when asked for certificate numbers or renewal dates.

A cleaning contract that gets the specification, the SLA structure and the pricing model right at the outset is far easier to manage for its whole term than one where those gaps get discovered six months in.

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