How much does it cost to make a bar of soap?

A basic bar costs about £0.50-1.50 in materials. Premium bars with expensive oils and essential oils can cost £2-4 per bar. The main costs are oils (40-50%), fragrance (20-30%) and packaging (10-15%).

How should I price my soap for sale?

Material cost should be about 20-30% of selling price. If a bar costs £1.50 to make, price it at £5-7.50. This accounts for your time, overheads, wastage and profit margin. Check local market prices too.

How do I reduce costs?

Buy oils in bulk, use fragrance oils instead of essential oils, choose cheaper base oils (like sunflower or olive pomace), and buy packaging in quantity. Each of these can save 20-40% on that ingredient.

What about the cost of my time?

This calculator covers material costs only. For a true cost per bar, add your time at your desired hourly rate. A batch typically takes 1-2 hours including cleanup. Divide your time cost across all bars in the batch.

Soap Cost Calculator — Cost Per Bar

Calculate the total cost per bar including all oils, lye, fragrance and additives.

Oil Cost (per batch)

Enter the cost in pounds

Lye Cost (per batch)

Lye (NaOH or KOH) weight

Fragrance Cost (per batch)

Fragrance oil amount

Additives (per batch)

Colourants, exfoliants, etc.

Mould Cost

Mould dimension

Mould Lifetime Uses

Mould dimension

Packaging Per Bar

Enter the packaging per bar

Sundries Per Bar

Gloves, wipes, etc.

Bars Per Batch

Enter the bars per batch

How We Calculate This

How the Calculation Works

All material costs for one batch are added together. The mould cost is amortised across its expected lifetime uses.

Batch cost = oils + lye + fragrance + additives + (mould / uses) + (packaging x bars) + (sundries x bars)

Cost per bar = batch cost / number of bars

Frequently Asked Questions

Related Calculators

Lye Calculator

Calculate sodium hydroxide (NaOH) or potassium hydroxide (KOH) amounts for cold process soap.

Oil Ratio Calculator

Balance your soap recipe oils for hardness, lather, conditioning and cleansing.

Fragrance Load Calculator

Work out safe fragrance or essential oil amounts for soap batches.

Mould Volume Calculator

Calculate soap mould volume and the total oil weight needed to fill it.

SAP Value Calculator

Look up and calculate saponification values for common soap-making oils.

Last updated: 2025-02-20

All calculations are estimates. Always verify quantities before purchasing materials.