AI agents for business finance: what they can and can't do
What AI agents can do in bookkeeping, close, collections and compliance today, where a person must stay in charge, and how to judge a product.
The short answer
A small block moulding yard needs a vibrating machine, power, a borehole and a curing area; our labelled example came to ₦6,020,000 before land. Cement is the main cost per block, at ₦12,000-₦15,000 a 50kg bag in July 2026 according to CemNet; in our example a nine-inch block cost ₦710 and sold for ₦850.
Machine options
Your machine decides output, block quality and how many workers you need.
| Type | How it works | Suits |
|---|---|---|
| Manual mould | Mix is rammed into a steel mould by hand | Very small output, own building project |
| Mobile (egg-laying) machine | Moves along a concrete floor, laying blocks in rows | Medium output with a large flat yard |
| Stationary vibrating machine | Vibrates and compacts blocks onto pallets | Steady commercial production |
| Hydraulic or automatic plant | Press and conveyor system, high output | Large industries supplying estates |
Vibration and compaction make stronger, more even blocks than hand ramming. Ask sellers for a demonstration, the number of blocks per hour, power needs and how easy spare parts are to find, and compare at least two quotes.
Start-up cost
These are example figures with assumed prices for a small yard with a stationary vibrating machine; land or rent is not included.
| Item | Assumption (example) | Amount |
|---|---|---|
| Stationary vibrating block machine with motor | ₦1,800,000 | |
| Generator or power connection | ₦900,000 | |
| Borehole, pump and tank | ₦1,500,000 | |
| Pallets or curing floor | ₦300,000 | |
| Wheelbarrows, shovels, mixing tools | ₦120,000 | |
| Shed and cement store | ₦700,000 | |
| First cement and sand | ₦700,000 | |
| Example start-up budget | ₦6,020,000 |
The example totals ₦6,020,000. The borehole and power often cost as much as the machine. Before building, read our guide to block industry site, water and permits.
Cement price: the cost that moves most
Cement is usually the largest cost in each block. CemNet reported in July 2026 that a 50kg bag sold for ₦12,000 to ₦15,000 depending on producer and location: Dangote Cement ₦13,000-₦15,000, BUA ₦12,000-₦14,500 and HBM Nigeria (formerly Lafarge Africa) ₦12,000-₦13,500, with some unbranded or resold bags above ₦15,000 in parts of Lagos, Abuja, Port Harcourt and the south-east.
Profit per block: a worked example
This example uses a cement price of ₦13,500, inside the July 2026 range, and assumes 30 nine-inch blocks per bag. Your yield depends on your mix; stretching cement over more blocks lowers cost but weakens them, and builders who see cracked blocks do not come back.
| Cost per 9-inch block | Assumption (example) | Amount |
|---|---|---|
| Cement | ₦13,500 a bag ÷ 30 blocks | ₦450 |
| Sharp sand | ₦90,000 a tipper ÷ 600 blocks | ₦150 |
| Water | borehole pumping | ₦10 |
| Labour | moulding and curing | ₦50 |
| Machine fuel and wear | ₦30 | |
| Loading | ₦20 | |
| Cost per block | ₦710 |
Each block costs ₦710. At an example selling price of ₦850 at the yard, that leaves ₦140 a block. Selling 800 blocks a day for 24 days gives 19,200 blocks and ₦2,688,000 a month before rent, machine repairs, a guard and your own pay.
Now move cement to ₦15,000, the top of the range. Cost per block rises to ₦760 and the margin falls to ₦90, a cut of about 36%. That is why many block makers set prices for short periods, ask for deposits on big orders, and buy cement in bulk when they have the cash and dry storage.
Sand, labour and curing
- Sand: sharp sand that is free of clay and organic matter gives strong blocks; muddy sand saves money and costs reputation.
- Labour: crews are often paid per block moulded; agree rates in writing and count daily.
- Curing: keep blocks in the shade and wet for several days before stacking or sale; blocks sold too early crumble.
- Delivery: price transport separately by distance; breakages in transit come out of your margin.
Common mistakes
- Quoting a builder for weeks at a fixed price while cement keeps moving.
- Selling blocks before they have cured, to meet a deadline.
- Buying a machine without checking spare parts and a local technician.
- Letting cement absorb moisture in a leaky store, which wastes bags.
- Giving credit to contractors without a written agreement on payment dates.
Who buys
Builders, contractors, estate developers, landlords and individuals building their own homes. Contractors bring big orders but may ask for credit; individuals pay upfront but buy in smaller loads. Many yards add paving stones, kerbs or lintels; see interlocking paving stone business costs. To keep deposits and balances in order, our guide on getting paid on time helps.
Where Pryme fits
Builders pay deposits and balances by transfer. A Pryme Business Account with invoicing records each order, and payroll can pay your crew, with each run approved before it moves.
Questions people ask
How much is a bag of cement now in Nigeria?
CemNet reported ₦12,000-₦15,000 per 50kg bag in July 2026, depending on producer and location. Ask local dealers for today's price.
How many blocks can one bag of cement make?
It depends on block size and mix. Stretching a bag over too many blocks weakens them; agree a mix that gives sound blocks and keep to it. Our example assumed 30 nine-inch blocks.
What is the profit on one block?
In our example a nine-inch block cost ₦710 and sold at ₦850, leaving ₦140 before overheads. Cement price changes move this quickly.
How much does a block moulding machine cost?
Prices vary widely by type, from manual moulds to hydraulic plants. Get demonstrations and written quotes from at least two sellers.
Sources
- CemNet: Nigerian cement prices continue to rise despite Huaxin takeover (22 Jul 2026) · accessed Oct 2026
- Corporate Affairs Commission: New Schedule of Fees (Gazette No. 92 Vol. 112, 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.