You cannot price what you have not costed. Yet most market traders, home bakers, and early-stage producers set their selling price by looking at competitors, adding a bit, and hoping the sums work out. They do not.
A proper cost model has seven categories. Miss one and your margin evaporates. Miss two and you are working for free. This guide walks through all seven, shows you how to calculate each per unit, and demonstrates the full build using a 96-brownie production session.
The Seven Cost Categories
Every food product you sell carries seven cost lines. Some are obvious. Some are silent. All of them eat your margin if you do not track them.
1. Raw Ingredients
This is the only cost most founders calculate. List every ingredient by exact weight in grams. Price it per unit as purchased — not per 100 g, not per serving, per pack. Then calculate cost per gram and multiply by recipe quantity.
Example: you buy a 1 kg bag of caster sugar for £1.30. Cost per gram = £1.30 ÷ 1,000 = £0.0013. Your brownie recipe uses 220 g per batch. Ingredient cost = 220 × £0.0013 = £0.29.
Do this for every ingredient. Do not round. Do not estimate. Small errors across twelve ingredients become large errors per unit.
2. Packaging
Primary packaging touches the product: cling film, greaseproof paper, compostable sleeve, jar, lid. Secondary packaging presents it: band, sticker, swing tag. Compliance packaging carries the label: you must declare allergens under Natasha's Law if you are selling PPDS.
Price every component. A compostable brownie sleeve costs £0.09. A printed allergen sticker costs £0.03. The paper napkin costs £0.02. Total packaging per brownie: £0.14.
Founders routinely underestimate packaging by 40% because they forget the napkin, the band, the thank-you card. All of it costs money.
3. Direct Labour
National Living Wage from April 2025 is £12.21 per hour. Even if you are paying yourself nothing today, cost your time at NLW. You cannot scale a business model that only works when labour is free.
Track total session time: setup, weighing, mixing, baking, cooling, packaging, cleanup. Divide total labour cost by session yield to get cost per unit.
This is where single-batch costing breaks. If you bake one batch of 24 brownies and it takes 90 minutes, labour per brownie = (1.5 × £12.21) ÷ 24 = £0.76. That is unusable. No brownie can carry 76p of labour and still hit a sensible selling price.
But you do not bake one batch. You run a session. Four batches, 96 brownies, oven shared across two rounds, setup and cleanup once. Total time: 3 hours. Labour cost = 3 × £12.21 = £36.63. Per brownie = £36.63 ÷ 96 = £0.38.
That is the real cost. That is the number you price against.
4. Energy
Your oven, hob, and mixer all pull power. A domestic fan oven running at 180°C for 30 minutes costs approximately £0.20–£0.25 depending on your tariff. If you bake two trays per round, that is £0.10–£0.12 per tray, or roughly £0.05 per brownie in a 24-unit batch.
Scale this across your session. Four batches, two oven rounds, total energy ≈ £0.45. Per brownie = £0.45 ÷ 96 = £0.005, effectively negligible at production scale. Energy becomes meaningful at commercial kitchen scale (£0.10–£0.15 per unit), but at home volume it rarely moves the margin.
Include it for completeness. Do not let it distract you from labour, which is ten times larger.
5. Channel Fees
Every sales channel takes a cut. Market stall pitch fees run £20–£50 per day. Etsy charges 6.5% transaction fee plus £0.16 per listing. SumUp card reader: 1.69% per transaction. Wholesale to a café means they buy at roughly half retail, so the fee is baked into your wholesale price structure.
For a market stall: if you sell 60 brownies at £3.50 each, revenue = £210. Pitch fee £35. Fee per unit sold = £35 ÷ 60 = £0.58.
On Etsy: you sell one brownie box of four for £12. Etsy takes 6.5% = £0.78, plus listing fee £0.16. Total fee = £0.94 per box, or £0.24 per brownie.
Channel fees vary wildly. You must cost them separately for each route to market.
6. Wastage
Brownies crack. Jars do not seal. Biscuits burn. Wastage in a home kitchen typically runs 8–12%. Commercial bakeries with controlled equipment hit 3–5%. You are not a commercial bakery.
Wastage is not a separate cost line. It is a multiplier. Take your unit cost before wastage and divide by (1 − wastage rate).
Example: cost per brownie before wastage = £0.85. Wastage rate = 10%. True cost = £0.85 ÷ 0.90 = £0.94.
Do not price at £0.85 and hope for the best. Price at £0.94 or accept that one in ten units earns nothing.
7. Overheads
Business insurance, council registration (free but time costs), labels, website hosting, food hygiene certificate, equipment depreciation. These do not attach to a single brownie, but they attach to your business.
The simplest method: estimate monthly overhead (£40–£80 for most home producers), estimate monthly unit sales, divide. If you spend £60/month on overheads and sell 400 units, overhead per unit = £0.15.
This is rougher than the other six categories. That is acceptable. Overheads at home scale are low. They become significant when you move to rented premises or employ staff.
Worked Example: 96-Brownie Production Session
Four batches. Each batch yields 24 brownies (20 cm × 20 cm tin, 4 × 6 grid). Total yield: 96 brownies. Session time: 3 hours (45 min setup and cleanup, 4 × 20 min mixing, two shared oven rounds of 25 minutes each).
| Cost category | Calculation | Per session (96 brownies) | Per brownie |
|---|---|---|---|
| Raw ingredients | 4 batches × recipe cost | £28.80 | £0.30 |
| Dark chocolate 400 g × 4 | 1.6 kg @ £5.50/kg | £8.80 | — |
| Butter 200 g × 4 | 800 g @ £6.00/kg | £4.80 | — |
| Caster sugar 220 g × 4 | 880 g @ £1.30/kg | £1.14 | — |
| Eggs 4 × 4 | 16 eggs @ £0.25 each | £4.00 | — |
| Plain flour 140 g × 4 | 560 g @ £1.20/kg | £0.67 | — |
| Cocoa powder 50 g × 4 | 200 g @ £12.00/kg | £2.40 | — |
| Vanilla extract 5 g × 4 | 20 g @ £180/kg (£9/50ml) | £3.60 | — |
| Baking powder 5 g × 4 | 20 g @ £6.00/kg | £0.12 | — |
| Sea salt 3 g × 4 | 12 g @ £4.00/kg | £0.05 | — |
| Baking paper (4 sheets) | 4 × £0.08 | £0.32 | — |
| Packaging | 96 × unit pack cost | £13.44 | £0.14 |
| Compostable sleeve | 96 × £0.09 | £8.64 | — |
| Allergen sticker | 96 × £0.03 | £2.88 | — |
| Napkin | 96 × £0.02 | £1.92 | — |
| Direct labour | 3 hrs @ £12.21/hr | £36.63 | £0.38 |
| Energy | Two oven rounds @ £0.22 each | £0.44 | £0.005 |
| Overheads | £60/month ÷ 400 units/month | £14.40 | £0.15 |
| Subtotal before wastage | — | £93.71 | £0.976 |
| Wastage | 10% (÷ 0.90) | — | +£0.108 |
| Total cost per brownie | — | — | £1.08 |
Cost per brownie at production scale: £1.08. That is your baseline. Every pricing decision starts here.
Gross Margin Formula (and Why It is Not One Number)
Gross margin = (selling price − cost per unit) ÷ selling price.
Not cost × margin. Not selling price ÷ cost. Those give you different numbers and wrong decisions.
Example: cost £1.08, sell £3.00. Margin = (3.00 − 1.08) ÷ 3.00 = 0.64 = 64%.
Most pricing advice tells you to target 65% or 70% margin and stop. That advice is useless because margin is not a single fixed target. It is a channel-tiered band.
- Direct sales (markets, online, events): healthy 55–65%, workable on volume 45–55%, walk away below 45%
- Wholesale (café, deli, retailer): healthy 40–50%, watch closely 35–40%, walk away below 35%
- Premium / specialist: healthy 60–70%+, watch 55–60%
Your brownie at £3.00 sits at 64% margin — top end of the healthy direct band. At £2.50 it drops to 57%, still healthy direct. At £2.00 it falls to 46%, workable if you have volume. Below £2.00 you are in walk-away territory unless you cut cost or change the product.
Wholesale is different. A café expects to buy at roughly half retail. If retail is £3.00, wholesale is £1.50–£1.70. At £1.60 your margin is (1.60 − 1.08) ÷ 1.60 = 32%. That is below the walk-away threshold. You cannot wholesale this brownie at current cost. You would need to produce at larger scale (lower labour per unit), simplify packaging, or decline the wholesale opportunity.
Channel determines margin band. Cost and margin together determine whether the channel is viable.
Markup vs Margin: Know the Difference
Markup and margin are not the same. Confuse them and you will underprice every product.
Markup = (selling price − cost) ÷ cost
Margin = (selling price − cost) ÷ selling price
Example: cost £2.00, sell £4.00.
Markup = (4 − 2) ÷ 2 = 1.00 = 100%.
Margin = (4 − 2) ÷ 4 = 0.50 = 50%.
A 100% markup sounds huge. A 50% margin is moderate. Same numbers, different frame. When someone says 'double your cost', they mean 100% markup, which gives you 50% margin. If you need 60% margin, you must sell at £5.00, which is a 150% markup.
Always calculate margin, not markup. Margin tells you what percentage of revenue is left after cost. Markup does not.
Channel-Specific Pricing: Three Scenarios
Same brownie, three channels, three price points. Cost remains £1.08.
| Channel | Selling price | Channel fee | Net revenue | Gross profit per unit | Margin | Verdict |
|---|---|---|---|---|---|---|
| Market stall | £3.00 | £0.58 (£35 pitch ÷ 60 sold) | £2.42 | £1.34 | 55% | Healthy direct |
| Etsy | £3.50 | £0.25 (6.5% + £0.04 listing) | £3.25 | £2.17 | 67% | Healthy direct |
| Wholesale to café | £1.65 | £0 | £1.65 | £0.57 | 35% | Watch closely |
Market stall: after pitch fee, margin drops from 64% to 55%. Still healthy. Sell 60 units, gross profit = 60 × £1.34 = £80.40 per market day.
Etsy: higher selling price absorbs the platform fee. Margin 67%, excellent. But Etsy requires photography, SEO, shipping cost (not shown here), and much lower volume. Gross profit per unit is higher; total monthly profit depends on volume.
Wholesale: margin 35%, bottom of the watch band. You would need to sell high volume (200+ units per café per month) to make this work, or you would need to reduce cost by producing at larger scale in a commercial kitchen. At home-kitchen scale and current cost, wholesale is borderline unviable.
Do not price once and sell everywhere. Price per channel, and walk away from channels that do not support your cost structure.
Labour: The Silent Cost Most Founders Omit Entirely
If you do not cost your labour, your margin is fiction.
Most home bakers calculate ingredient cost, add 50%, and call that the price. A £0.30 brownie becomes £0.45. They sell it for £2.50 and believe they are making £2.05 profit per unit. They are not. They have ignored £0.38 of labour, £0.14 of packaging, and £0.15 of overheads. Real profit: £2.50 − £1.08 = £1.42, not £2.05. The difference is 44%.
Even if you pay yourself nothing today, cost labour at National Living Wage. If your business model only works when you earn £0 per hour, you do not have a business. You have an expensive hobby.
Scale helps. A single 24-brownie batch costs £0.76 per unit in labour. A 96-brownie session costs £0.38 per unit. Four times the output, less than double the labour. Setup, cleanup, and oven time do not scale linearly. That is why production sessions matter.
But even at £0.38 per unit, labour is the second-largest cost line after ingredients. Miss it and you will underprice every product by 30–40%.
Quarterly Repricing Rule
Your cost model is not static. Ingredient prices change. Butter in January 2025 costs 8% more than butter in January 2024. Cocoa is up 12%. Energy prices fluctuate every quarter. National Living Wage rises every April.
Your printed labels do not change. Your Etsy listing does not auto-update. Your regular market customers expect the same price week to week.
That is the trap. Cost creeps up silently. Margin erodes. You do not notice until six months later when you check your bank account and wonder why there is nothing left.
Set a calendar reminder: first Monday of every quarter, rebuild your cost model. Same spreadsheet, updated prices. Recalculate cost per unit. Check your margin against current selling price. If margin has dropped below your channel band, you have three choices: raise price, reduce cost, or accept lower margin and increase volume.
Do not let cost drift. It will eat your business before you notice.
What to Do Next
Open a spreadsheet. List the seven cost categories. Fill in your numbers for one product, at production-session scale, not single-batch scale. Calculate cost per unit. Check your current selling price against that cost. Calculate margin. Compare margin to your channel band.
If margin is healthy, you are fine. If margin is in the watch band, you need volume or cost reduction. If margin is below walk-away, change the product, change the channel, or stop selling it.
Do this for every product. Do it again every quarter.
Cost is not the exciting part of a food business. It is the part that decides whether your food business survives.