A contract cleaning agreement gives you a defined standard for a fixed monthly fee and moves the employment risk off your books; an in-house team gives you direct control but hands you every on-cost and every absence. For most UK workplaces the contract model wins on cost certainty and cover. Bottom line: contract unless you need line-management control.
What a cleaning contract buys you
Contract cleaning is an ongoing agreement to clean your premises to a written specification for a fixed monthly fee. It bundles the cleaner's wage, employer on-costs, cover, supervision, equipment, consumables, insurance and compliance into one predictable number, paid monthly by Direct Debit with a single annual indexed review. You manage an outcome and a specification, not a payroll.
What an in-house team costs to run
Employing cleaners means the wage (£12.71 NLW, or £13.45 Real Living Wage where required) plus employer's NI, pension, 12.07% holiday-pay uplift, and day-one Statutory Sick Pay from April 2026 — before you have bought a single machine or bottle of chemical. Add COSHH management, PPE, training, and the supervisor time spent recruiting and covering absence, and the true hourly cost sits well above the headline wage.
Cover, reliability and single points of failure
An in-house rota with one or two cleaners has a single point of failure: when they are off, the clean does not happen. A contract builds in a named relief, so cover is contractual rather than something you scramble for. That reliability is the reason many buyers move from in-house to contract after one too many missed cleans.
Who carries the compliance and insurance
Under a contract, the provider holds the COSHH assessments, method statements, vetting (DBS/PVG/AccessNI as the role requires), Employers' and Public Liability insurance, and any accreditations (SafeContractor, CHAS, ISO) your own auditors ask for. In-house, all of that is your responsibility — including the legally compulsory Employers' Liability cover of at least £5m.
When to keep it in-house
Keep cleaning in-house when you need absolute control over who is in the building (high-security or sensitive sites), when cleaning is part of your service offer, or when a very large single site justifies a full employed team with its own supervisor. Even then, most operators contract out periodic and specialist work rather than buying the equipment and training for jobs done a few times a year.
Contract cleaning vs in-house team, compared
| Factor | Contract cleaning | In-house team |
|---|---|---|
| Cost | One fixed monthly fee, all on-costs included; VAT added | Wage plus NI, pension, holiday pay, SSP, equipment and management time |
| Control | Managed via specification and audits | Direct line management of your own staff |
| Reliability / cover | Named relief; cover is contractual | You cover every absence yourself |
| Compliance | Provider holds vetting, insurance and accreditations | You own COSHH, vetting, insurance and H&S |
| Best for | Most offices, clinics, retail and industrial sites | High-security sites, cleaning-is-core businesses, very large single sites |