Most factories know what their materials cost. Fewer know what their downtime costs, or what a tonne of imported input really costs once it has cleared the port.

Those gaps are where margin goes. Individually each looks small enough to ignore. Together they can take a fifth of revenue out of a plant that appears, on its own figures, to be profitable.

Here is where to look.

Cost	Typical share of revenue	What drives it
Energy, grid and generator	30 to 60%	Outages, generator efficiency, diesel price
Logistics, inbound and outbound	10 to 40%	Port charges, haulage rates, distance to market
Labour including overheads	10 to 20%	Allowances and benefits on top of wages, low early productivity
Maintenance and downtime	5 to 20%	Spare parts lead times, unstable voltage, deferred servicing
Material overhead and waste	5 to 20%	Duty, freight, clearing, scrap and spoilage
Finance and foreign exchange	5 to 15%	Local lending rates, rate movement between order and payment
Regulatory and compliance	1 to 5%	Certification, renewals, audits

Energy, and an assumption worth testing

Energy is the largest hidden cost in most Nigerian plants, and the one most often mis-estimated in the same direction.

Do the arithmetic yourself. Diesel has been around 907 naira a litre. A generator in reasonable condition yields roughly three to three and a half kilowatt-hours per litre at sensible load, which puts self-generated power near 260 to 300 naira per kilowatt-hour. Band A grid power is 209.50 naira across most distribution companies and 160 on EEDC.

The grid is cheaper than your generator. That surprises people, because the working assumption in Nigerian industry is that diesel is simply what running a factory costs. On a line running continuously, the difference between 209 and 290 naira a unit is a substantial sum over a year, and it is invisible unless somebody works it out.

What actually reduces this cost is unglamorous. A correctly sized generator rather than an oversized one loafing at low load. Servicing on schedule. Knowing your tariff band. And where the capital exists, solar to displace daytime diesel, which typically pays back over a few years rather than months but removes a cost that only ever rises.

Downtime is output you already paid to produce

When a machine stops, you continue paying for everything except the output.

Manufacturers commonly lose between 5 and 20% of potential output to unplanned downtime. A line producing 1,000 units an hour at 500 naira each loses half a million naira for every idle hour, and the repair bill is the smaller half of that number.

Two causes dominate here. Spare parts that must be imported, which turns a two-hour fault into a six-week stoppage. And unstable voltage, which destroys drives and control boards over time. A stabiliser and proper protection cost a fraction of the equipment they protect, and a modest shelf of critical spares bought with the machine is the cheapest insurance in the plant.

A written maintenance schedule, even a simple one, prevents more loss than any single piece of equipment you can buy.

What imported material actually costs

The invoice price is not the cost. Duty on CIF value, VAT at 7.5%, the ECOWAS levy at 0.5%, CISS at 1%, clearing and agency fees, port charges and inland haulage all sit on top, and demurrage sits on top of that whenever documents are late.

Build your costing from the landed figure, never the supplier’s quotation, and hold it in dollars per kilogram so a naira movement does not silently invalidate the whole model.

Scrap belongs in this section too. Trimmings, start-up waste and rejected batches are material you have already paid for at full landed cost. A crusher and pelletiser recover most of it, which is why that equipment usually repays itself faster than anything else in the plant.

Labour costs more than the payroll line

Allowances, transport, pension and benefits commonly add 40 to 60% on top of base wages. An operator on 50,000 naira costs meaningfully more than 50,000 naira.

The larger hidden cost is productivity. A new operator produces less and wastes more for months, and if he leaves you pay that cost again from the beginning. Training is cheaper than turnover, and retaining the few people who genuinely understand your machine is a commercial decision rather than an administrative one.

Finance and the exchange rate

Local lending rates and rate movement between ordering and paying together erode 5 to 15% of revenue in many plants.

The practical defence is timing and visibility. Know what your input costs in dollars, know what moves your naira exposure, and where you can, agree prices and settle when the rate is in your favour rather than when the invoice happens to arrive.

Compliance, which is small until it is not

Certification, renewals and audits typically run 1 to 5% of revenue. The number is modest. The risk is not, because an expired certificate can stop production entirely, and the cost of that is measured in the downtime section above rather than this one.

What to do first

Measure before you fix. Most of these losses are invisible because they sit inside larger accounting lines, and a plant that cannot separate energy cost per unit from total overhead cannot tell whether anything it does is working.

Then take the two largest. In almost every Nigerian factory those are energy and downtime, and both respond to attention rather than to capital. Right-size the generator, service it, protect the electrics, hold the spares, and write down the maintenance schedule.

The rest follows from buying correctly in the first place, which is where we work with clients: what the equipment has to do, whether the supplier can support it years from now, and what the whole thing costs delivered and running rather than on the invoice. Details at venocipal.com.