Business, Main Street / SMB

How to Underwrite a Commercial Cleaning Business

Underwrite a commercial cleaning business by building an account-level schedule of contracts, then testing gross margin per account after labor and supplies and how often accounts churn. The metrics that matter most are monthly recurring contract revenue, account retention rate, labor cost as a share of revenue, and concentration in the largest customers.

What makes commercial cleaning underwriting different

Janitorial companies sell recurring labor under monthly contracts with offices, medical facilities, schools and industrial sites. Revenue looks recurring, but most contracts allow cancellation on 30 to 60 days notice, so retention depends on service quality and relationships. Labor is the dominant cost, and the workforce has high turnover, often works night shifts and is paid near minimum wage, so wage law changes flow straight into margins. Pricing is set at bid time and can be hard to raise mid-contract. Some operators subcontract or franchise work, which changes the risk profile. Capital needs are light, so cash conversion is good when receivables are collected promptly.

Lenders like the low capex and monthly billing but worry about short cancellation terms and thin margins. They focus on account retention history, receivables quality and whether wage increases can be passed through. Equity buyers see a fragmented industry suited to roll-ups, where density in a metro area lowers supervision cost and where specialty services like medical facility cleaning or floor care carry better margins. Equity often values a long tenure customer base and a sales engine that wins bids, while a lender wants to see that the largest accounts will remain if the owner exits.

Key metrics

Monthly recurring contract revenue

The value of contracted monthly billing is the core earning base, separate from one-time project work like carpet cleaning or construction cleanup.

Account retention rate

Because contracts can be cancelled on short notice, the actual history of keeping accounts is the best evidence of durable revenue.

Labor cost as a percentage of revenue

Labor is the largest cost, so small wage changes or overtime can erase margin.

Gross margin by account

Underpriced accounts can absorb crews without contributing profit, and blended margin hides them.

Customer concentration

Losing a large property manager or campus contract can remove a meaningful share of revenue at once.

Underwriters often flag any single customer above about 10 percent of revenue.

Days sales outstanding

Cleaning companies pay workers weekly or biweekly while some customers pay slowly, so receivables drive liquidity.

How to underwrite it, step by step

Build an account schedule with monthly contract value, start date, cancellation terms, services and assigned crew hours.
Calculate gross margin by account using actual labor hours, wages, payroll taxes and supplies.
Measure account wins and losses over three years and identify why accounts were lost.
Review wage rates against current and scheduled minimum wage changes and model pass-through ability.
Check worker classification, I-9 compliance and wage and hour claims history.
Analyze accounts receivable aging and largest customers' payment behavior.
Confirm insurance and bonding requirements and any client-required certifications.
Size debt on recurring contract EBITDA and structure retention-based seller consideration.

Due diligence checklist

Customer contract schedule with values and cancellation terms
Copies of top customer contracts
Payroll registers and labor hours by account
Account win and loss history for three years
Accounts receivable aging
I-9 records and employment policies
Wage and hour claims and settlements
Janitorial bond and liability insurance policies
Subcontractor or franchise agreements
Monthly P&L for three years

Key risks and mitigants

Customers cancel on short notice after ownership changes.

Visit key customers in diligence, haircut accounts under short contracts and tie part of price to retention.

Minimum wage increases compress margin.

Review contract escalation clauses and test margins at scheduled wage levels.

Wage and hour or worker classification liability.

Audit payroll practices, require seller indemnity and consider an escrow holdback.

Employee theft or damage claims at client sites.

Confirm bonding, background check policies and claims history.

Concentration in one property manager or institution.

Stress cash flow for loss of the top account and review its rebid timing.

Typical financing and deal structure

Smaller cleaning companies are usually financed with SBA 7(a) loans and seller notes, since there are few hard assets to secure conventional loans. Asset-based revolvers or receivables lines help larger operators fund payroll ahead of customer payments. Private equity platforms rolling up regional janitorial companies use senior cash flow or unitranche loans with acquisition facilities. Because revenue retention after closing is the main uncertainty, earnouts and seller notes tied to account retention are common, and escrow holdbacks cover wage and hour exposure. Covenants generally include leverage and fixed charge coverage tests and receivables reporting for revolvers.

Red flags

Large share of revenue from accounts won in the last year at unusually low bid prices.
Workers paid in cash or classified as independent contractors without support.
Top customer contract expires or rebids shortly after closing.
Margins dependent on wage rates below scheduled local minimum wage increases.
Receivables from large customers aged well beyond contract terms.

Frequently asked questions

How do you value a commercial cleaning company?

Smaller janitorial companies are usually valued on a multiple of SDE and larger ones on EBITDA. Buyers look at the stability of monthly contract revenue, customer tenure, margins by account and concentration. Companies with specialized services such as medical facility cleaning or long tenured customers tend to earn higher multiples than those dependent on a few recently won bids.

Are janitorial contracts really recurring revenue?

They recur in practice but not always contractually. Many commercial cleaning contracts allow either side to cancel on 30 to 60 days notice. That is why underwriters look at actual retention history and customer tenure rather than contract length alone. Long relationships with consistent service often prove sticky despite short notice periods.

What labor risks matter when buying a cleaning business?

Key risks include high turnover, wage increases, overtime, worker misclassification and immigration compliance. Underwriters review payroll records, I-9 files, claims history and scheduled minimum wage changes, and test whether contracts allow price increases. Indemnities and escrow holdbacks are common to cover pre-closing wage and hour exposure.

Can you buy a janitorial business with an SBA loan?

Yes. SBA 7(a) loans are commonly used because cleaning companies have little hard collateral. The lender will focus on cash flow coverage from tax returns, account retention, the buyer's management experience and transition support from the seller. A seller note is often part of the structure.

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Educational content, not investment, credit, legal or tax advice. Benchmarks are common practitioner rules of thumb and vary by lender, market and cycle.