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The short answer
Bar soap is made by reacting oils such as palm kernel, coconut or palm oil with a measured amount of caustic soda (sodium hydroxide) dissolved in water, pouring it into moulds, cutting it and letting it cure. In our labelled example, a 10kg-oil batch makes 100 bars for about ₦37,000, or ₦370 a bar, and sells to shops at ₦600, leaving about ₦23,000 a batch before labour. Before selling to supermarkets, ask NAFDAC whether and how your soap must be registered.
How bar soap is made
Soap is the product of saponification: fats and oils react with an alkali and turn into soap and glycerine. For hard bars the alkali is caustic soda, sold as sodium hydroxide flakes or pellets. Small producers in Nigeria usually choose between three methods.
- Cold process
- Oils and caustic solution are mixed at moderate temperature, poured into moulds, cut after setting and left to cure. Cheap to run and flexible, but bars need time on a rack before sale.
- Hot process
- The mixture is cooked until saponification finishes, then packed into moulds. Bars can be used sooner, but the texture is rougher and harder to make attractive.
- Melt and pour
- You buy a ready soap base, melt it, add colour and fragrance, and pour. No caustic soda handling, but the base costs more and your margin is thinner.
Most people starting a bar soap business for shops and markets use cold process, because it gives the lowest cost per bar and full control of the recipe.
Ingredients and how to get the quantities right
- Oils: palm kernel and coconut oil give a hard bar with strong lather; palm oil adds firmness; shea butter or a little castor oil adds conditioning. Buy from a supplier who can sell the same grade every time.
- Caustic soda: buy from a chemical dealer, check the bag is sealed and dry, and store it away from damp and children.
- Water: clean, soft water; borehole water high in minerals can affect the bar.
- Fragrance and colour: use fragrance oils and colourants made for soap.
- Optional additives: oatmeal, black soap ash, clay or honey, if you can describe them truthfully on the wrapper.
Every oil needs a different amount of caustic soda, so never guess the quantity. Put your exact oil weights into a reputable soap lye calculator, weigh everything on a digital scale, and keep the recipe in writing. Too much caustic soda leaves a harsh bar that can burn skin; too little leaves a soft, greasy one. Test a small batch, let it cure, and use it yourself before selling.
Safety is part of the cost
Caustic soda is corrosive. Wear chemical-resistant gloves, goggles and long sleeves, work in a ventilated space, always add caustic soda to water and never water to caustic soda, and keep vinegar and plenty of water nearby for spills on surfaces. Keep fresh bars away from customers until they have cured.
Moulds, cutting and curing
| Mould type | Good for | Watch out for |
|---|---|---|
| Wooden loaf or block mould, lined | Large batches cut into uniform bars | Needs a cutter or wire frame for even sizes |
| Silicone loaf moulds | Small batches, easy release | Small capacity per pour |
| Individual cavity moulds | Shaped or branded bars | Slower to fill and unmould |
| PVC pipe moulds | Round bars at low cost | Can be hard to push out |
Cut bars to a fixed weight so every bar you sell is the same size, and stack them on open racks with air around each bar. Curing times are commonly several weeks for cold-process soap; follow what your own tests show and do not wrap bars that still feel soft.
Worked example: one batch (example figures)
Example only. The quantities and prices below are illustrative, not market prices or a recipe. Your lye calculator decides the real caustic soda weight for your oils.
| Item | Example cost |
|---|---|
| 10kg oil blend at ₦2,500/kg | ₦25,000 |
| Caustic soda, 1.5kg at ₦2,000/kg | ₦3,000 |
| Fragrance and colour | ₦4,000 |
| Wrappers and labels, 100 at ₦50 | ₦5,000 |
| Total for 100 bars | ₦37,000 |
| Cost per bar | ₦370 |
If shops pay ₦600 a bar, the batch brings in ₦60,000 and leaves ₦23,000 before your labour, rent and power. Selling direct at ₦900 a bar raises the batch margin to ₦53,000, but you then spend time and money on selling. Price your bar against what is already on the shelf where you plan to sell, and decide whether you are competing on price or on a premium recipe.
NAFDAC and registering the business
NAFDAC handles product registration applications through its NAPAMS online portal, as published guides to food registration describe. We could not confirm from an official page which registration category or fee applies to bar soap, so ask NAFDAC directly whether your soap needs registering, under which directorate, and what it will cost, before you print wrappers. Supermarkets and distributors commonly ask suppliers for a NAFDAC number, so settle this before approaching them.
Registering a business name with the Corporate Affairs Commission is a separate step; the CAC fee schedule published in May 2025 put business name registration at ₦20,000. If you plan liquid products too, see liquid soap production and detergent powder production. Income from soap sales may be taxable; our guide to tax on side hustle income explains the basics.
Where Pryme fits
Shops buying cartons of soap will want an invoice and a receipt for each delivery. A Pryme Business Account includes invoicing and bank-transfer checkout free of charge, so each carton sold is matched to a payment.
Questions people ask
What are the ingredients for making bar soap?
Oils or fats (often palm kernel, coconut and palm oil), caustic soda (sodium hydroxide), water, and optional fragrance, colour and additives. Use a lye calculator to set the caustic soda weight for your oil blend.
How much does it cost to start bar soap making?
A small cold-process start needs a digital scale, safety gear, buckets, moulds and racks, plus your first batch of oils and caustic soda. In our example, the materials for 100 bars cost ₦37,000; equipment depends on what you already own.
Do I need NAFDAC to sell soap in Nigeria?
Ask NAFDAC directly; we could not confirm the current category or fee for bar soap from an official page. Supermarkets and distributors commonly ask for a NAFDAC number, so settle registration before you approach them.
How long should bar soap cure before selling?
Cold-process soap is commonly left to cure for several weeks. Follow your own tests: bars should be firm and mild before you wrap and sell them.
Sources
- Mondaq / Firmus Advisory: Registration of packaged edible oil with NAFDAC in Nigeria, 29 May 2025 · accessed Oct 2026
- Corporate Affairs Commission: New Schedule of Fees, 29 May 2025 · accessed Oct 2026
This article is general information, not financial, legal or tax advice. Products described are provided under the terms on this site and are subject to regulation and eligibility.