Every business with a building eventually asks the same question: do we employ someone to clean it, or do we contract a cleaning company to do it? Both are valid answers and the right one depends on the size of the site, how predictable the workload is, and how much management time you want to spend on cleaning rather than on the business itself.
This guide compares the two approaches directly, without pretending one is always better. It covers cost structure, cover for sickness and holidays, who owns and maintains the equipment, how much of your own time it takes to manage, and where compliance responsibility sits in each case.
The short version
- In-house cleaning means direct employment costs, cover gaps and equipment ownership
- Contract cleaning shifts staffing risk and equipment cost to the cleaning company
- Sickness and holiday cover is the single biggest practical difference between the two
- Contract cleaning usually comes with insurance and compliance built in
- In-house can work well for very large or highly specific single sites
What in-house cleaning actually means
In-house cleaning means you employ the cleaner or cleaning team directly. You are their employer, so you carry the usual employment responsibilities: contracts, pay, holiday entitlement, sick pay, pension, and management.
It gives you direct control over who is in the building and when, and over time a good in-house cleaner learns a site intimately, which suits businesses with unusual layouts, sensitive materials or specific security requirements.
What contract cleaning actually means
Contract cleaning means a cleaning company employs the staff and you buy a service, defined by a specification and a schedule. The company is responsible for recruiting, training, managing, insuring and covering its own workforce.
You are still buying an outcome, a clean building, but the employment relationship and the operational risk of running that workforce sits with the contractor rather than with you.
Cost structure: what you are really comparing
In-house cleaning cost is a direct employment cost: wages, employer's national insurance, pension contributions, holiday pay, sick pay, training, and any equipment and consumables you buy and maintain yourself. It is fixed regardless of whether the cleaner is on site that day.
Contract cleaning cost is a service fee, usually built from the floor area, specification and frequency covered in a separate guide on office cleaning costs. The contractor absorbs the wage on-costs, insurance and equipment into that fee, and manages cover internally.
Neither structure is automatically cheaper. A single large site with a full-time cleaner can be efficient in-house, while a smaller or multi-site business often finds a contractor's shared overheads work out more cost-effective.
Sickness and holiday cover
This is where the two approaches diverge most sharply in practice. If your in-house cleaner is off sick or on holiday, someone has to arrange cover, and that is usually a manager's problem to solve at short notice, or the cleaning simply does not happen that day.
A contract cleaner has a workforce to draw on, so cover for sickness and holiday is built into the service rather than being your problem to fix. The visit still happens, even if the individual person changes.
- In-house: cover has to be arranged internally, often at short notice
- In-house: a single-person team means no cleaning at all if they are off
- Contract: cover is the contractor's responsibility, not yours
- Contract: the specification, not the individual, defines the standard
Equipment, training and consumables
In-house cleaning means you buy, maintain and replace equipment: vacuum cleaners, floor machines, chemicals and consumables. You are also responsible for training on safe use of chemicals and equipment, and for keeping that training current.
Contract cleaning includes equipment and consumables as part of the service. The contractor maintains its own machinery, buys in bulk, and trains its staff on its own procedures, which removes that ongoing cost and administrative load from you.
Management time, the cost nobody puts in a spreadsheet
Employing anyone, including a cleaner, comes with management overhead: recruitment, appraisals, HR processes, disciplinary procedures if standards slip, and simply being the person who deals with it when something goes wrong.
With a contractor, quality issues are raised against a specification and resolved by the contractor's own management structure. You are managing a supplier relationship, which is a different and generally lighter task than managing an employee directly.
Compliance and insurance
Health and safety compliance, COSHH assessments for chemicals, and public liability insurance are your responsibility if you run cleaning in-house. That is manageable, but it is another area of the business you have to stay on top of.
A reputable contract cleaner carries its own insurance and manages COSHH and health and safety for its own staff and processes, and should be able to provide evidence of both on request. That is one of the practical questions worth asking before signing any contract, covered in more detail in our guide to what commercial cleaning includes.
When in-house genuinely makes sense
In-house cleaning tends to work best on a single large site with a predictable, full-time workload, where the role justifies employing someone directly and where site-specific knowledge or security clearance is a real requirement.
It can also suit organisations that already have HR and facilities infrastructure in place, so the extra employment overhead of one more role is marginal rather than a new administrative burden.
When contract cleaning tends to win
Contract cleaning tends to make more sense for smaller sites, multi-site businesses, buildings with variable footfall, and anyone who does not want to carry staffing risk, equipment cost and compliance administration themselves.
It also suits businesses that want the flexibility to change frequency or scope without going through a redundancy or recruitment process, since the arrangement is contractual rather than a direct employment relationship.
The honest way to decide
There is no universally correct answer, only the right answer for your building and your business. The clearest way to decide is to cost both properly: total employment cost including cover, equipment and management time against a written contract cleaning quote covering the same specification.
Once both numbers are on the same page, in pounds and in the same units, the decision usually becomes obvious.
Questions we get asked about this
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