Square POS: how the plumbers get paid in the driveway

Hafner Plumbing gets paid in driveways. Two guys, a van, and for years a paper invoice pad and a promise to mail a check. The checks showed up late and the pad got coffee on it. So I set up Square on Rich's phone in about twenty minutes on a Tuesday, and the first tap payment cleared before his van left the curb.

Here's the thing about Square. The software costs nothing. There is no monthly bill on the free plan, no contract, no sales guy who has to come out and install anything. You pay only when you get paid. In person, tapping a card or phone, the fee is 2.6% plus 15 cents. Online and invoiced payments run higher, around 2.9% plus 30 cents. If you take money from humans on the street, that is the whole deal.

What it cost Rich, line by line

Rich did not buy a register. He bought a contactless and chip reader, about $59, and a cheap stand for the counter when he's in the shop. The app is free on any decent phone. So the start of this story costs about sixty dollars and a Saturday-morning coffee.

Numbered, because this is the part people overthink.

Download the app and answer about ten questions about the business. The bank questions are the slow part, not the software.
They ship the reader. It pairs over Bluetooth in a minute.
Type your top ten jobs into the item library. Water heater swap, drain cleanout, service call. Now a quote is two taps and it prints or emails itself.
Send the first real invoice to a customer you trust, and tell them what you are doing. Rich's customers liked it better than waiting for a check.

Total: $59 up front and 2.6% plus 15 cents on every tap. On a $400 water heater job that is about $11.65. Rich decided that was cheaper than a ride to the bank twice a week, and he is right.

Where flat rate wins and where it does not

The fee never moves. A plain debit card, a platinum rewards card, a birthday gift card from an aunt, all 2.6% plus 15 cents. That is flat-rate processing, and I explain it with something I did for twelve years. On service calls I charged a flat rate for a capacitor swap. Same price whether the part took ten minutes or the unit was jammed against a wall and the job took an hour. Predictable. Sometimes you lose a little on the easy ones and win a little on the hard ones.

The old-school merchant account guys sell the opposite, a tiered rate that looks cheaper on paper and then bills you a monthly statement fee, a gateway fee, and whatever else fits on the page. For a small shop, flat rate usually wins because you can do the math in your head. For a restaurant doing hundreds of big debit tickets a day, the math gets different and the flat rate starts to sting.

The parts that will annoy you

Square holds money sometimes. New accounts, unusual volume, a suspicious-looking weekend, and they can sit on your deposits while they look you over. It is the complaint almost every review buries at the bottom and it is the one that hurts. Rich avoided it by starting small, running a few real transactions the first week, and filling out the account verification before Square asked. Do that.

The other thing is the upsell drumbeat. Square sells payroll, loyalty programs, marketing emails, and paid tiers for restaurants and retail that run up to $149 a month. Those are fine products and you do not need any of them on day one. The free plan already does invoices, item tracking, and reports. Skip the rest until a customer asks for it by name.

Also, support. Free plan gets you email and forums, not a person on the phone. I have needed support once in four years, over a mislabeled deposit, and the answer took a day. Acceptable for what it costs, which is nothing.

What to do Monday

Pull your card processing statement from last month. Add up every fee line, then divide by total card sales. That number, not the rate on the contract, is what you actually pay. If it comes out worse than about three percent, put that statement in front of Square's calculator and compare. If you are still waiting on checks, the twenty minutes of setup is your Monday, and the reader ships free.