A Primary Research Primer on Commercial Cleaning and Facilities Services for Investment Professionals

Commercial cleaning and facilities services is the business of running other people's buildings. It is the largest outsourced services sector most generalists never look at. Recurring revenue. Contractual stickiness. Customer retention rates above 80% at the well-run operators. Roughly half of every dollar paid out in labour. A market that is enormous, fragmented at the bottom, and slowly concentrating at the top.

The listed universe is small but operationally rich. ISS, Compass, Sodexo, Aramark, Rentokil, Mitie, ABM, and a handful of mid-caps. The PE-relevant universe sits beneath those names in a long tail of regional janitorial and IFM operators where private M&A transacts at roughly 8x EBITDA against listed comparables that trade closer to 11x.

This primer covers how the sector actually works for investors who need to underwrite it. The contract structures. The unit economics. The labour exposure. The fault lines between hard services and soft services, between integrated FM and single-service, between self-perform and subcontract. The players that matter. The KPIs that move the numbers. The questions a good primary research call asks of a current or former operator before any capital gets deployed.

What Is Commercial Cleaning and Facilities Services?

The boundary problem first. "Commercial cleaning" and "facilities services" are used interchangeably in casual conversation and they should not be. The businesses behind them have different cost structures, different margin profiles, and different sources of competitive advantage.

Commercial cleaning, narrowly defined, is the contracted provision of janitorial work to non-residential buildings. Offices, hospitals, schools, retail, industrial, airports. Labour-intensive, scheduled in shifts, priced per square foot per month, and treated as operating expense by the client. The US commercial cleaning industry alone is roughly $110 billion, and UK general building cleaning is projected to reach £9.8 billion in revenue in 2025-26 with revenue having climbed at a compound annual rate of 5.6% over the prior five years.

Facilities services is the larger frame. It contains cleaning but also security, catering, landscaping, pest control, waste, mechanical and electrical engineering, building fabric maintenance, and the workplace technology layer sitting on top. Industry convention splits the work into two buckets. Soft services covers the labour-driven, occupant-facing functions like cleaning, security, reception, catering and grounds. Hard services covers the engineering-driven, asset-facing functions like HVAC, plumbing, electrical, fire safety, and statutory life-safety work. Hard services is expected to capture the largest market share by 2035 as building stock gets more technical and statutory compliance burdens grow.

The two buckets behave differently. Soft services is high-volume, low-margin transactional labour. The barriers to entry are low because the work is. Hard services is qualified engineers, capital equipment, statutory compliance, and skilled labour. The barriers are real because the work demands them, and the margin profile reflects that.

Sitting above both is integrated facilities management, IFM. The IFM model typically consolidates five to twelve service lines under a single service provider, reducing operational overhead by up to 15 to 25%. The pitch to the client is one contract, one point of accountability, one consolidated invoice, one data layer. An IFM partner might handle both HVAC and janitorial under one service-level agreement, using a shared help desk, data platform and performance metrics. The pitch to the investor is bigger contracts, longer durations, higher switching costs, and the cross-sell margin that comes with bundling.

That last point is the central debate in the sector. Bundling works in theory. In practice, large IFM contracts have shown a stubborn tendency to disappoint on margin. The client retains procurement leverage that scale was supposed to neutralise. The prime contractor subcontracts most of the work anyway. And the unbundling cycle eventually reverses every consolidation cycle. Roughly one in four outsourced services returns in-house within two years. Any underwriting of the IFM thesis has to account for where in the cycle the contract sits.

Why It Matters to Investors

Five reasons the sector deserves serious attention.

Non-discretionary demand. Buildings need cleaning, security, and statutory maintenance through every cycle. A tenant cutting headcount still needs the bathrooms cleaned and the fire alarms tested. The work has the closest profile to a true subscription that exists outside of software, with the added advantage that you cannot self-host the cleaning of an office.

The outsourcing trend. Over 65% of large enterprises outsource facility services, and more than 40% of global office space now relies on third-party facility operators. The direction of travel has been consistent for two decades. Corporates do not want to run buildings, and the in-house FM team is one of the easier line items to convert from fixed to variable cost. Outsourced models held 72% share of contract cleaning in 2025, up materially from a decade ago.

Fragmentation. The top of the market is consolidated. ABM Industries holds the largest share among the top players with roughly 6% of the global market. The bottom is a long tail of regional operators with no scale, no technology, and a founder approaching retirement. Private equity groups and PE-backed platforms are actively buying great local and regional operators because it is a big, recurring-revenue market with thousands of small, fragmented providers, and scale and systems create a real competitive edge. The roll-up thesis is structurally real and has been running for a decade with no sign of running out.

The labour story. Wage inflation is the single biggest threat to margins and the single biggest source of margin differentiation. The UK National Living Wage rose to £12.21 in April 2025, pushing up hourly pay rates across the industry. Median US janitorial wages rose to roughly $32,000 in 2023 and climbed another 6% in 2024, squeezing providers bound by fixed-price contracts. The operators that indexed contracts well and built operating leverage absorbed it. The ones that did not watched margin erode.

The technology layer. Tennant has now sold over 10,000 autonomous mobile robots, reinforcing the company's leadership in robotic cleaning. Autonomous floor scrubbers, IoT cleaning verification, data-driven scheduling, and predictive maintenance platforms are turning a labour business into a labour-plus-software business. The operators that get the transition right will look very different in five years from the ones that do not.

The reason generalists skip the sector is that headline financials look unattractive. Single-digit operating margins. Capital-light but cash-flow-light. A perpetual narrative of contract repricing pain. None of which is wrong, but all of which misses the point. The differences between operators are almost entirely operational. Two cleaning companies with identical contract books can produce wildly different returns depending on how they schedule labour, price inflation pass-throughs, retain managers, and cross-sell. The sector rewards investors who do the operational work and punishes those who underwrite from the income statement alone.