At a market stall you make the product before you know how much you will sell. Whatever is left at the end of the day is waste, and the pitch fee is the same whether you sell 20 units or 80. So the cost that matters is not the cost of each unit you make. It is the cost of each unit you sell. Price from the recipe alone and your margin disappears between what goes home unsold and what you pay to be there.
Where a stall loses margin
- What you do not sell. Brownies, bread or juice from today that you cannot offer next week. You paid for them anyway.
- The pitch fee. A fixed cost per day. A slow day makes it weigh twice as much.
- Tasters. Samples sell, but every sample is product nobody pays for.
- Getting there. Fuel, parking, and the time it takes to set up and pack down.
- Your hours on the stall. Six hours standing behind a table is work, even if you are not cooking.
Worked example: brownies at a Saturday market
You take 48 brownies to a farmers market. Your cost per unit, with ingredients, packaging, your kitchen time and the oven, is $1.10. You sell them at $3.50. The pitch fee is $40 for the day. At close you have sold 40 and have 8 left.
What you thought: you make 3.50 − 1.10 = $2.40 per brownie. With 40 sold, 40 × 2.40 = $96.
What happened:
| Item | Amount |
|---|---|
| Sales: 40 × $3.50 | $140.00 |
| Production: 48 × $1.10 | −$52.80 |
| Pitch fee | −$40.00 |
| You keep | $47.20 |
Your real cost per brownie sold was:
- Production spread over what sold: 52.80 ÷ 40 = $1.32
- Pitch fee spread over what sold: 40 ÷ 40 = $1.00
- Total: 1.32 + 1.00 = $2.32
Your real margin is (3.50 − 2.32) ÷ 3.50 = 33.7%, not the 68.6% the recipe suggested. One more number worth knowing: with 48 brownies made and the fee paid, you spent 52.80 + 40 = $92.80. To break even you need to sell 92.80 ÷ 3.50 = 26.5, so 27 brownies. Anything below that is a loss.
The numbers that matter most
Sold versus taken. The most useful number on a stall. Take 48 and sell 40, and you sold 83%. Record it every market day, per product. After four or five weeks you know how much to bring and which days to bring less. The guide on production planning shows how to turn that record into how much to make.
Cost per unit sold. Production plus fee, divided by what you sold. This is the cost your price really has to cover.
Daily break-even. How many units you must sell to cover production and the fee. The guide on the break-even point goes deeper, and the one on fixed vs variable costs helps you separate what you pay regardless from what moves with volume.
Waste per product. Not everything is lost the same way. A cake can sell tomorrow at a lower price; fresh juice cannot. The guides on measuring food waste and on shelf life and unsold stock help you decide what to bring more of.
Samples and travel. Write down how many samples you give and what the trip costs each day. If tasters use up a brownie and a half every hour, that is a cost just like the fee. Read what samples and tastings cost before deciding how many to hand out.
How to keep track
A notebook or sheet with one row per market day: product, units taken, sold, left over, price, fee, travel, and takings split by cash and card. At the end of the month, add up and divide. If a product always sells less than 70% of what you take, make less or swap it for something else. If you take card payments, include the fees too: the guide on payment fees in your price shows how. The guide on selling at markets and fairs has more on fees and pricing.
Do it with the calculator
The food cost calculator costs one product at a time and saves nothing, so note each result or copy the link. If you take one batch per market day, put the pitch fee in other costs per batch and the share you do not sell as waste: the cost per unit it returns is already your cost per unit sold.