Money
Break-even
FreeHow many customers one day needs before you have earned anything. And how many it needs to reach the profit you want.
Open itHow to use it
- Type your figures in Settings once: monthly fixed costs, daily labor, average sale, materials per sale, and days open. This screen reads them.
- Type the monthly profit you want, if any. The target line moves with it.
- Press Print this page. Tape the sheet by the back door, so every shift can read it.
- Press See which days cost you money at the end of the screen to open Lost revenue. Under it is what the paid plan adds: it emails your regulars when a slow day is coming.
What it does
- Each customer only covers what is left after materials: the average sale minus the materials per sale. Dividing costs by the full sale gives a number that is too low.
- Fixed costs are spread over the days you open. Then the day’s labor is added. Closing one day a week raises the daily target.
- The answer is rounded up. Customer 46.5 has not covered you. Customer 47 has.
- If the unit cost is equal to or above the sale, the screen shows a message instead of a wrong number.
- From 26 October 2026, opening this from Today puts the one or two figures it is waiting for at the top of the panel, in a box you can type into there. It saves to Settings like any other field and disappears once it is answered, so you are not sent to another screen for one number.
- The figures you type here are kept with the shop, not with this visit. Come back next week, or open KANJIN on another device, and they are as you left them.
Related screens
Settings
FreeYour numbers live here and nowhere else. Every other screen reads from this page, so you type each figure once.
Profit by item
FreeEvery item or service on one chart: how much it earns against how often it sells. You can see what to push, fix or cut.
Lost revenue
FreeWhat your slow weekdays and rainy days cost you in a year, counted from your own stamp card and the number of rainy days you tell us you get. Then the one thing that wins some of it back: the slow-day email on the paid plan.
Break-even calculator
FreeHow many customers you need each day before your shop starts making money.