Most facility managers hire their first commercial cleaning company the same way they hire the second and third one — by price, a referral, or a quick Google search. Then six months in, something goes wrong. Insurance doesn't cover the damaged desk. The crew turns over every six weeks. Someone bids a new SOW that makes it clear the original vendor was skipping half the scope. This guide gives you the eight vetting questions that prevent that spiral — the ones that separate real commercial cleaning operators from companies who've figured out how to price a job but not how to run one.
1. What Insurance Do You Carry — and Can You Name Us as Additional Insured?
This is the non-negotiable first filter. A legitimate commercial cleaning operator carries:
- General liability — at minimum $1M per occurrence / $2M aggregate for a small office; higher for larger accounts
- Workers' compensation — legally required in nearly every state; protects you if their employee is injured on your property
- Janitorial bond — covers theft by cleaning staff
- Commercial auto — for any crew driving vehicles on your property
Ask for a Certificate of Insurance that names your organization as additional insured. This isn't paperwork — it's real protection. If a cleaner damages a $4,000 desk or floods a server room, the COI is what determines whether your vendor's insurance pays or yours does.
Red flag: vendors who claim they have insurance but can't produce a COI in 24 hours, or who charge a fee to add you as additional insured. Legitimate operators do this as standard.
2. Are Your Employees W-2 or 1099?
A large share of the commercial cleaning industry runs on 1099 independent contractors. This keeps vendor costs low, but creates three problems for you:
- Workers' comp often doesn't cover 1099 workers — meaning if they get hurt on your property, your insurance is exposed.
- Training and accountability are weaker. 1099 workers aren't supervised the same way W-2 employees are.
- Background checks and I-9 verification are often skipped because the vendor doesn't have an employment relationship.
W-2 employment doesn't guarantee quality, but 1099 staffing almost guarantees inconsistency. Ask directly.
3. What's Your Background Check and Onboarding Process?
Your cleaning crew will have keys, alarm codes, or after-hours access to your facility. Every single employee should be:
- Background-checked (criminal record, at minimum 7-year county and national database)
- I-9 verified for work eligibility
- Trained on your specific site before the first solo shift
- Identifiable in uniform and/or with a photo ID badge
If a vendor can't describe their onboarding in detail, they don't have one.
4. How Do You Handle OSHA Training and Chemical Safety?
OSHA's Hazard Communication Standard (29 CFR 1910.1200) requires employers to train staff on the chemicals they use, maintain Safety Data Sheets (SDS) for every product, and provide appropriate PPE. For cleaning crews, this isn't optional — it's federal law.
Ask your vendor:
- Do you maintain an SDS binder for every site?
- What's your documented training program for new hires?
- How often do you conduct refresher training?
- What PPE do you provide, and who pays for it?
This matters even more for specialized environments. A crew working in a warehouse, data center, or healthcare facility needs environment-specific OSHA training beyond the basics.
5. What's Your Supervision and Quality Control Model?
Here's how the industry's weaker operators run: they hire cleaners, assign sites, drop supplies off, and collect customer complaints. That's it. No site visits, no inspections, no measurable quality.
Legitimate commercial operators run structured QC that includes:
- A named account manager for your site (not a sales rep who disappears after signing)
- Regular on-site inspections by a supervisor, not just the crew
- Written inspection reports shared with you
- A clear escalation path when issues arise
- A formal monthly or quarterly review meeting
Ask to see a sample inspection report. Good vendors keep them. Bad vendors will be improvising one after the call.
6. What's Your Team Turnover Rate?
The commercial cleaning industry averages roughly 200% annual turnover. That's the industry average, not the worst case. Every time your crew changes, you lose institutional knowledge — where the alarm panel is, which offices are sensitive, how the trash routing works, which conference rooms need early-morning reset.
Ask:
- What's your annual turnover rate?
- How long has the crew lead been with the company?
- What's your plan for crew continuity if someone quits?
Vendors with sub-60% turnover (the top quartile) typically pay better, offer benefits, and supervise their crews more actively. That investment shows up in your facility.
7. Can You Provide Client References in My Industry and Building Size?
References are table stakes, but the quality of the reference matters. A vendor who only has small-office references can't prove they operate at Class A scale. A vendor whose references are all property management companies may not know how to work with owner-occupants.
Ask for three references that specifically match your profile: similar industry, similar square footage, similar hours of operation. Then call them — don't just glance at the names. Two questions to ask every reference:
- What's the most frustrating thing about working with this vendor?
- Would you sign with them again today?
The first question gets you past the pitch. The second gets you the honest answer.
8. How Are You Handling Green Cleaning and Sustainability?
Green cleaning has moved from "nice to have" to expected in most modern corporate facilities. LEED-certified buildings have specific cleaning requirements. Many Fortune 500 tenants now audit their cleaning vendors' chemical inventories as part of corporate sustainability reporting.
Ask your vendor:
- Do you use Green Seal, EcoLogo, or EPA Safer Choice certified products?
- Do you use concentrated chemicals with dilution control systems (less plastic waste, better worker safety)?
- Do you use HEPA filtration on vacuums?
- Do you use microfiber for cleaning rather than disposable wipes?
- What's your approach to recycling and waste diversion?
This isn't just PR — greener chemicals and better tools generally correlate with better-run vendors. The operational discipline required to train a team on proper dilution control is the same discipline required to execute a good cleaning program.
Key Takeaways
- Demand a Certificate of Insurance naming your organization as additional insured before signing.
- W-2 employment, background checks, and real OSHA training separate legitimate operators from price-cutters.
- Structured quality control — site supervision, written reports, named account managers — is non-negotiable.
- Turnover rate is the leading indicator of service quality. Ask for it.
- References should match your industry, building size, and hours. Call them.
Bel Cleaning can answer all 8 of these — in writing.
We're a W-2, OSHA-trained, fully insured commercial janitorial company with 15+ years of Class A office experience. Request a quote and we'll send our complete vendor documentation package with your proposal.