Pricing by the square foot without losing money

A single rate per square foot is the most common way a small contractor prices, and it is wrong at both ends of the range.

The small job problem

Mobilizing costs what it costs. Getting the truck, the grinder and two people to a site is the same effort for a 300 square foot garage as for a 3,000 square foot warehouse bay, but at one rate the garage carries a tenth of the overhead. That is why the small jobs feel busy and the year feels thin.

Two fixes, and you want both:

• a minimum charge per item, so a tiny area still pays for setting up
• a trip charge, quoted as its own line so nobody thinks you hid it

The big job problem

At the other end, a single rate leaves money on the table in reverse: you win large work at a price that assumed small-job overhead, then discover the margin is thinner than the number suggested because the material was bought in packs and you rounded up five times.

Price material by what you buy — kits, pails, boxes — not by the square foot you sell. Six hundred square feet at 250 per kit is three kits, not 2.4, and the spare kit is real money.

Tax is not one rate either

In most US states, labor on an improvement to real property is exempt while materials are taxable. If you apply one tax rate to the whole subtotal you are either over-charging your customer or under-collecting for the state, and both get noticed eventually. Split the quote by what is taxable and allocate proportionally.

Know your own number

The useful figure is not the industry average. It is the margin you normally land on the work you actually win. Once you know that, a quote that comes out fifteen points under it is a question worth asking before you send it, rather than a surprise on the invoice.