A bid calculator for commercial work is a chain of four conversions and each one is a place to be wrong. Gross area becomes cleanable area. Cleanable area becomes hours through a production rate. Hours become cost through a loaded wage. Cost becomes price through a margin. Most free bid calculators do the last step and ask you to supply the first three, which is the equivalent of a till: useful, but not the thing that decides whether you should have taken the account.
Cleanable area is not floor area
The gross square footage on a lease includes walls, columns, lift shafts, plant rooms and areas nobody cleans. Cleanable area is what your crew actually covers, and on a typical office it is meaningfully less than the headline figure. Bidding on gross area quietly pads your hours, which sounds safe until a competitor bids on cleanable area and wins on a number you could have matched.
Production rates, by space type
Open office, private offices, restrooms, kitchens, corridors, stairwells, clinical and warehouse space all clean at different rates, and restrooms are usually the slowest per square foot by a wide margin. A bid built on one blended rate will be wrong on any building whose mix differs from the one the rate came from. Measure your own on the jobs you already hold; it is the most valuable number a commercial cleaner owns.
Loaded labour and the margin step
Convert hours to cost with the wage plus employer payroll tax and insurance, not the wage alone: federal employer FICA is 7.65% before any state unemployment or workers' compensation. Then divide by one minus the margin rather than adding a markup, or the margin you asked for is not the margin you get. A calculator that adds a percentage and calls it margin is understating your price by around nine points at a 35% target.
Questions people ask about commercial cleaning bid calculator
Is there a free janitorial bidding calculator?
Several exist. Check which of the four conversions each one actually does; most start at hours and leave the area conversion to you.
What is a reasonable cost per square foot?
It depends entirely on space mix, frequency and your wage market, which is why a published figure is a poor guide. Derive yours from a building you already clean.
Should I bid lower to win the first account?
If you do, know the number you are giving up and put an escalation in the term. A loss-leader with no path back to profitability is just a loss.