Accurate estimates are the difference between landing profitable contracts and leaving money on the table. Most janitorial business owners either underprice to win bids or overestimate and lose clients to competitors. Getting the formula right means understanding your actual costs and building estimates that reflect the real work.
Calculate Your True Labor Costs
Labor is typically 60–75% of your janitorial service costs. Start by determining your fully-loaded hourly rate, which includes wages, payroll taxes (15% federal + state), workers' compensation insurance (usually 15–25% for janitorial), and benefits if you offer them. If you pay a cleaner $18/hour, your actual cost per hour is closer to $22–26 depending on your location and insurance rates.
Map out the square footage you can realistically clean per hour. Most commercial properties average 3,000–5,000 sq ft per labor hour for standard office cleaning (daily or nightly). High-rise buildings, medical facilities, or carpet-heavy spaces drop to 2,000–3,000 sq ft per hour. Use this figure consistently across all estimates.
Factor in Supplies and Equipment
Supplies typically run 8–15% of your contract value. Create a line-item breakdown for each property type:
- Office buildings: Trash liners, toilet paper, paper towels, general-purpose cleaner, floor stripper, glass cleaner, disinfectant (~$0.30–0.50 per 1,000 sq ft monthly)
- Medical/dental facilities: Higher disinfectant volume, HIPAA-compliant waste, medical-grade supplies (~$0.60–0.85 per 1,000 sq ft)
- Retail spaces: Floor care products, spot treatments, more frequent restocking (~$0.40–0.65 per 1,000 sq ft)
- Industrial buildings: Degreaser, heavy-duty detergent, more frequent deep cleans (~$0.50–0.75 per 1,000 sq ft)
Equipment depreciation and maintenance (mop, buckets, vacuums, carpet extractors) adds another 3–5% annually. Track actual consumption for 2–3 months on similar properties to refine these estimates.
Account for Overhead and Margins
Overhead includes vehicle fuel, liability insurance, office staff, scheduling software, uniforms, and licensing. Most janitorial businesses operate on 15–20% overhead as a percentage of revenue. If your estimated labor and supplies total $3,000 for a contract, add 15–20% ($450–600) to cover business operations.
Apply a profit margin of 15–30% depending on contract size and risk. Smaller contracts (under $500/month) typically need 25–30% margin to justify the administrative burden. Larger contracts ($2,000+/month) can work at 15–20% margin due to economies of scale.
Formula: (Labor + Supplies + Overhead) × (1 + Profit Margin) = Final Quote
Adjust for Risk and Contract Terms
Long-term contracts (12+ months) with stable facilities warrant lower quotes; one-off or high-turnover clients justify premiums. If a prospect wants weekly deep cleans plus daily maintenance, break it into separate line items so pricing is transparent and adjustable.
Include a 10% contingency for properties you've never worked in before. You won't know traffic patterns, equipment condition, or layout until you're on-site. Once you've cleaned a space for 30 days, you can adjust the contract if your estimate was materially off.
Use Site Inspections as Leverage
Never quote without a walk-through. You need to see floor types, restroom facilities, number of trash zones, and access points. An office that looks 5,000 sq ft on the floor plan might have narrow hallways, multiple floors with slow elevator access, or carpeted areas requiring different equipment. Inspections also build trust—prospects see you're thorough, not guessing.
Document Your Estimates
Keep every estimate in a spreadsheet with date, property type, sq ft, frequency, final price, and whether you won the bid. After 20–30 estimates, patterns emerge: which property types convert best, which margins hold up under real conditions, and where you're consistently under or overestimating.
Listing your janitorial services on Mercoly makes it easier for property managers and facility directors to find you, compare your offerings, and request tailored estimates—turning visibility into booked contracts.
Frequently Asked Questions
Q: How often should I update my estimate format? Review and adjust your rates quarterly, or whenever fuel costs, insurance premiums, or labor costs shift significantly in your region.
Q: Should I include a site revisit fee if a prospect wants multiple estimates? Yes—charge $50–150 for a second inspection to deter tire-kickers and compensate for your time, but waive it if they sign.
Q: What's the fastest way to spot an unprofitable client during the sales process? If they demand a quote immediately without a walk-through and push for below-market rates, they'll likely micromanage and nickel-and-dime during the contract.
Start documenting your actuals today, and your next estimate will be sharper than your last.