Tuesday''s Ask the Experts question from a cleaning professional on the International Custodial Advisors Network (ICAN) "Ask the Experts" page: I am bidding on a plant with several offices and small rooms. I have this account already. This is a re-bid. Example: One office is 1,840 square feet x $.14 = $25.76. It takes about 60 minutes to walk back and clean it. Next office is 5,620 square feet, at $.14 it is $78.68. It takes about 90 minutes to clean. I pay employees $8.50 an hour. Supervision is not included. Do you notice the difference in price?
Yes, but I also noticed apparent confusion on pricing and some math errors.
Cleaning based on a square foot rate ($.14/square foot) is common.
Once you figure your actual job costs and add in overhead, supervision (yours or others) and your profit, you will have a figure that can be used to calculate a charge per square foot.
However, that charge must further be determined for a set period of time. Usually a monthly figure is used.
For example, if your math was correct in your question, you would be charging ...
— Lynn E. Krafft, ICAN/ATEX Associate Editor, firstname.lastname@example.org