Cassava processing in Nigeria can produce three very different businesses from the same crop: garri for mass-market food consumption, high-quality cassava flour for bakeries and food manufacturers, and industrial starch for pharmaceutical, textile, paper and other manufacturing uses.

The central difference is not simply the selling price. It is the combination of cassava variety, conversion rate, equipment, electricity, labour, quality requirements, transport, packaging and access to reliable buyers. A product with a higher price per kilogram can still produce a weaker margin if it requires expensive drying, laboratory testing or specialised machinery.

This guide explains how to compare the economics of garri, cassava flour and starch processing in Nigeria using naira-based examples. The figures are illustrative planning assumptions rather than guaranteed market prices, because cassava and finished-product prices vary substantially by state, season, quality and location.

Nigeria’s cassava opportunity

Nigeria remains one of the world’s largest cassava producers. The Central Bank of Nigeria’s cassava programme page gives an estimated annual production figure of about 53 million metric tonnes and notes that Nigeria still imports substantial quantities of cassava derivatives. It also identifies low yields, post-harvest losses and weak links between farmers and processors as major value-chain challenges.

The 2024 Agricultural Performance Survey by the National Agricultural Extension and Research Liaison Services and the Federal Ministry of Agriculture and Food Security estimated cassava production at approximately 64.36 million metric tonnes. The same report recorded average cassava production cost of ₦499,878 per hectare in 2024 and reported average cassava losses of about 20% in areas affected by pests and diseases.

These figures show why processing location matters. Fresh cassava is bulky and deteriorates quickly after harvest. A processor buying roots far from the farm can lose much of the margin through transport, spoilage and delayed processing.

What changes after processing?

Garri generally has the broadest retail market. Flour offers access to business-to-business buyers, but quality control becomes more important. Industrial starch can command a higher value per tonne, but it usually requires stronger technical capability and an established off-take arrangement.

How cassava processing margins work

A simple processing margin is calculated as:

[ \text{Gross Margin} = \text{Sales Revenue} - \text{Variable Processing Cost} ]

A fuller operating-profit calculation is:

[ \text{Operating Profit} = \text{Sales Revenue}

(\text{Cassava Cost}+\text{Labour}+\text{Energy}+\text{Packaging}+\text{Transport}+\text{Maintenance}+\text{Other Costs}) ]

The conversion ratio is critical. If one tonne of fresh cassava produces 250 kilograms of finished garri, the root cost allocated to each kilogram of garri is:

[ \text{Root Cost per kg} = \frac{\text{Cost of one tonne of cassava}}{250} ]

For example, if one tonne of cassava costs ₦100,000:

[ ₦100,000 \div 250 = ₦400 ]

That ₦400 is only the raw-material component. Labour, frying fuel, packaging, transport, rent, repairs and losses still need to be added.

Garri processing economics

Garri is produced by peeling, washing, grating, fermenting, pressing, sieving, frying and cooling cassava mash. White garri and yellow garri follow broadly similar processes, although yellow garri commonly uses palm oil during frying.

Garri has a strong advantage in Nigeria because consumers recognise the product and it can be sold through multiple channels:

• Farm-gate and village markets.
• Urban wholesalers.
• Open markets.
• Supermarkets and packaged-food outlets.
• Restaurants and food vendors.
• Direct online and community sales.

Its disadvantage is that competition is intense. Price differences can be small, and a processor may compete against products from several nearby communities.

Illustrative garri calculation

Assume a processor buys one tonne of fresh cassava and obtains 250 kilograms of saleable garri.

The operating surplus in this example is:

[ ₦225,000 - ₦178,000 = ₦47,000 ]

The operating margin on sales is:

[ ₦47,000 \div ₦225,000 \times 100 = 20.9% ]

This is not a guaranteed profit. If the selling price falls to ₦750 per kilogram, revenue becomes ₦187,500 and the processor records only ₦9,500 before fixed costs, tax, financing charges and owner compensation.

Garri sensitivity table

The table demonstrates why a processor needs to record actual daily buying and selling prices rather than relying on a single estimated margin.

Cassava flour margins

High-quality cassava flour, often called HQCF, is made by washing and peeling roots, grating or chipping them, pressing, drying, milling and sieving. The flour must generally meet buyer specifications for moisture, colour, cleanliness, particle size and absence of contaminants.

The World Bank’s Nigeria cassava value-chain analysis reported that approximately 83% of processed cassava was converted into garri, while only about 3% was converted into high-quality cassava flour. It also identified labour as a major Nigerian cassava production cost component.

Cassava flour processing can serve:

• Bakeries and confectioneries.
• Food manufacturers.
• Composite-flour producers.
• Snack manufacturers.
• Animal-feed businesses, depending on product specification.
• Institutional and industrial buyers.

The business model differs from garri because a processor may sell fewer tonnes but operate under a supply contract. That can improve planning, although rejection risk is higher when the product does not meet specifications.

Illustrative flour calculation

Assume one tonne of fresh cassava produces 220 kilograms of saleable dried flour.

The corresponding operating margin is:

[ ₦56,000 \div ₦264,000 \times 100 = 21.2% ]

The example produces a slightly higher naira surplus than garri, but it also assumes a higher selling price and increased drying and quality-control costs.

Why flour margins can change quickly

Flour output depends on:

• Dry-matter content of the cassava variety.
• Age at harvest.
• Quantity of peel and foreign matter.
• Water removal during pressing.
• Drying efficiency.
• Moisture level at final packaging.
• Rejection or discount by the buyer.

A processor who buys low-starch roots at an inflated price may produce less flour per tonne and lose the apparent price advantage.

Industrial starch margins

Industrial starch is technically different from ordinary cassava flour. It is produced by extracting, separating, washing and drying starch from cassava pulp. Depending on the intended use, the buyer may require controlled viscosity, whiteness, moisture, ash content, microbiological quality and other laboratory parameters.

Potential markets include:

• Pharmaceutical excipients.
• Paper and cardboard.
• Textile finishing.
• Adhesives.
• Processed foods.
• Seasoning and confectionery production.
• Industrial chemicals.

The Nigerian Natural Medicine Development Agency has highlighted local pharmaceutical-grade starch production as a way to reduce dependence on imported starch and reported pharmaceutical starch import costs of approximately US$23 million.

Illustrative starch calculation

Assume one tonne of fresh cassava produces 180 kilograms of saleable industrial starch.

The operating margin in this example is:

[ ₦74,000 \div ₦324,000 \times 100 = 22.8% ]

Although starch produces the highest surplus in this illustration, it also carries the highest technical and commercial risk. A processor may have a marketable product but no buyer able to absorb consistent industrial volumes.

Margin comparison

These figures are planning examples, not a national price survey. The ranking can reverse when cassava prices, conversion ratios, energy costs or selling prices change.

Which costs affect the result most?

Cassava purchase price

Raw cassava is frequently the largest expense. A ₦20,000 increase in the cost of one tonne directly reduces the processing surplus by ₦20,000 unless the selling price or output also rises.

The CBN has identified the need to link smallholder farmers with local processors and reduce post-harvest losses through processing facilities located close to production areas.

Energy

Garri frying commonly uses firewood, gas or other heat sources. Flour and starch processing may require mechanical drying, milling, pumping and extraction. In areas with unstable electricity, diesel costs can substantially change the result.

Energy cost should be recorded per batch rather than estimated as a general monthly figure. The useful calculation is:

[ \text{Energy cost per kg}

\frac{\text{Total energy cost for batch}}{\text{Saleable output in kg}} ]

Labour

Labour may include peeling, washing, grating, pressing, frying, sorting, drying, milling, loading and cleaning. A plant that appears profitable before labour may become loss-making when all processing hours are properly recorded.

Packaging

Bulk sales in woven polypropylene sacks have a different cost structure from branded retail packs. Retail packaging may increase the selling price but adds sachets, labels, sealing, design, compliance and distribution expenses.

Transport

Transport has two separate components:

1. Moving fresh cassava from farms to the processing site.
2. Moving finished products to the buyer or market.

A processor located close to farms may reduce the first cost but face higher distribution expenses. A processor in an urban area may have better customer access but pay more for fresh roots.

Break-even calculation

Break-even volume is calculated as:

[ \text{Break-even output}

\frac{\text{Fixed costs}}{\text{Selling price per kg} - \text{Variable cost per kg}} ]

Assume a garri processor has:

• Fixed monthly costs of ₦400,000.
• Selling price of ₦900 per kilogram.
• Variable cost of ₦712 per kilogram.

The contribution per kilogram is:

[ ₦900 - ₦712 = ₦188 ]

The break-even output is:

[ ₦400,000 \div ₦188 \approx 2,128 \text{ kg} ]

The processor needs to sell approximately 2,128 kilograms monthly before recovering the stated fixed costs. This calculation does not represent a recommendation; it is a method for testing whether a proposed plant capacity matches expected sales.

You can use ToolBase’s profit margin calculator to test different cassava costs, conversion rates and selling prices. A business expense template can also separate raw-material, energy, labour, packaging and transport costs.

Tax and registration considerations

A cassava-processing venture operating as a company falls within Nigeria’s corporate tax framework. The Federal Inland Revenue Service states that Companies Income Tax is governed by the Companies Income Tax Act, Cap C21, LFN 2004, as amended, and is imposed on company profits. Its published general rate is 30% of total profit.

The Finance Act 2020 amended the treatment of company sizes. FIRS guidance states that a small company with gross turnover of ₦25 million or less may qualify for exemption from companies income tax, subject to statutory conditions such as registration, tax identification and timely filing. Companies above that threshold may fall into medium or large-company categories under the applicable law and amendments.

The tax calculation is not based on sales revenue alone. A processor needs proper records of:

• Fresh cassava purchases.
• Wages and contract labour.
• Fuel, electricity and water.
• Repairs and maintenance.
• Packaging.
• Transport.
• Rent and equipment depreciation.
• Sales invoices and customer receipts.
• Bank charges and financing costs.

The applicable treatment can depend on the legal structure, turnover, accounting period, allowable deductions and subsequent amendments to tax legislation. The business registration and tax position should therefore be reviewed using current official guidance.

Food safety and quality control

Garri, flour and starch are food or food-related products, so production controls affect both compliance and commercial value. Relevant controls include:

• Clean water supply.
• Safe handling surfaces.
• Removal of foreign materials.
• Adequate drying or frying.
• Moisture control.
• Pest protection.
• Proper storage.
• Traceable packaging and batch records.
• Testing where required by the buyer or regulator.

The product with the highest theoretical price is not automatically the most profitable. If a processor cannot maintain consistent quality, rejected batches, discounts and customer returns can erase the expected margin.

Practical comparison for processors

This table describes commercial characteristics rather than personal business advice. The correct comparison depends on the processor’s location, equipment, supply arrangements and buyer requirements.

Conclusion

Garri generally offers the widest customer base and a simpler route to market. High-quality cassava flour can support business-to-business sales but depends more heavily on moisture, cleanliness and specification control. Industrial starch may deliver the highest value per tonne in an efficient operation, but it requires stronger technical systems, quality testing, reliable energy and dependable industrial buyers.

The most useful margin calculation is based on actual local data: cassava cost per tonne, saleable output, labour hours, energy consumption, packaging, transport and confirmed selling price. A processor can then compare garri, flour and starch using the same naira-per-tonne model instead of judging profitability from selling price alone.

This article is for educational purposes only and does not constitute professional advice. Consult a qualified professional for your specific situation.