Key takeaways
- Your cost per block = materials + labour + power + pallets/moulds wear + overheads, divided by good blocks produced.
- Cement is usually 50–70% of variable cost — mix design drives profit.
- Payback depends more on sales volume than on machine price.
- Use local prices: the method matters more than any published figure.
Published “profit per block” figures rarely survive contact with local prices. Instead of quoting numbers that may not apply in your country, this article gives you a method you can fill in with your own prices — the same one we use when preparing feasibility studies for clients.
1. Capital cost checklist
- Block machine with moulds
- Mixer, batching and conveyor
- Pallets (see pallet guide)
- Generator or grid connection
- Workshop roof, curing yard and foundations
- Loader or forklift, barrows
- Freight, customs and installation travel
- Working capital for 2–3 months of materials and wages
2. Variable cost per block
Work out the materials per batch, then divide by the number of good blocks per batch.
| Item | How to calculate |
|---|---|
| Cement | Bags per batch × price per bag ÷ blocks per batch |
| Sand & stone | m³ per batch × price per m³ ÷ blocks per batch |
| Labour | Daily wages ÷ blocks per day |
| Power / fuel | kWh per day × tariff ÷ blocks per day |
| Wear parts | (Mould + pallet cost ÷ life in cycles) ÷ blocks per cycle |
3. Worked example (illustrative)
Suppose a QT4-23A produces 4 blocks every 24 seconds, runs 8 hours at 75% efficiency: 4 × (3600 ÷ 24) × 8 × 0.75 = 3,600 blocks/day. If your total cost per block is C and your selling price is P, daily gross margin is 3,600 × (P − C). Multiply by working days and subtract fixed overheads to get monthly profit; divide total investment by monthly profit for payback in months.
Our capacity calculator estimates daily and monthly output for every model so you can drop the figures into this formula.
4. The profit levers
- Sales volume: idle machines destroy payback.
- Cement efficiency: correct grading and vibration can cut cement by 10–20%.
- Breakage: good curing reduces rejects.
- Product mix: pavers and curbs usually earn a higher margin than hollow blocks.
Want a feasibility sheet for your location? Send us your local prices and we will build it with you.
Frequently asked questions
How much does it cost to start a block making business?
It depends on the machine level and local building costs. A mobile or semi-automatic start-up is the lowest investment; fully automatic plants require more for the line, pallets and buildings. Contact us with your target output for a budget.
How fast can a block plant pay back?
Payback is driven by sales volume and margin per block. Use the method in this article with your own prices to calculate it.