Here is the trap with sidewalks: the footage is tiny, so the honest square-footage math produces a number that cannot pay for the day. A 3 foot wide, 30 foot long walkway is 90 square feet. At the example broom rate of $9 per square foot, that is $810, and $810 does not cover a crew, a truck, forms, and a concrete delivery with margin left over.
Small footage is where minimums live
Sidewalks and walkways are the poster job for a minimum charge. You still mobilize, still form, still finish, and the plant may hit you with a short-load fee for a partial truck. So quote the greater of the square-footage math or your minimum, and say it plainly. Customers accept “we have a minimum for small pours” far better than a mystery rate. If you have not set that floor yet, start with how to set a minimum job charge.
The per-square-foot rate itself still matters for longer runs, where the math does start to carry the job. Build it from your costs the same way as any flatwork rate, per what to charge per square foot for flatwork.
City spec walks are a different job
A backyard walkway is between you and the homeowner: 4 inches thick, joints where they should be, done. A public sidewalk, or anything in a right-of-way, comes with a spec book. Required thickness, joint spacing, cross slope for accessibility, sometimes a permit, sometimes an inspector who wants to see forms before you pour.
None of that is hard, but all of it is time, and time is money that has to be in the quote. Price city work as its own category, and read the local spec before you commit to a number, not after.
Curves cost forming time
Straight walks form fast with dimensional lumber. Curves need flexible forming, more stakes, more layout, and more cuts, and the finishing takes longer too because your screed runs are short and awkward. A curved walkway is prettier and slower. Quote the extra hours or watch them come out of your margin.
Check your numbers on the sidewalk concrete calculator. And since walkway customers almost always ask by text, PriceDesk is built for exactly that: your rates and your minimum on your phone, an itemized quote in about ten seconds. Try it free for 14 days.