Cement and steel are the two biggest material costs in any grey structure — and the two most commonly overcharged. The good news: both are commodities with published, checkable rates. If you understand how they're priced, you can spot padding in minutes.
How cement is priced
Cement is sold by the 50 kg bag, and the rate varies by brand and by region (north vs south zone). Major brands move within a fairly narrow band of each other; large mills publish ex-factory prices and the retail rate sits a bit above that.
The rate changes weekly, driven by fuel and coal prices, demand, the construction season, and taxes. Over a six-month build you'll cross several price changes — which is normal, and also a cover for padding if nobody's tracking the actual bags used.
Verify it like this: agree the brand in writing, check the current retail rate for that brand the week you buy, and count the bags delivered against the BOQ. Demand delivery challans and receipts.
How steel (rebar) is priced
Reinforcement steel is sold by weight — per ton or per kg — and the rate depends on two things people often gloss over:
- Grade. Grade 60 (60,000 psi yield strength) is the modern standard for residential RCC; older Grade 40 is weaker. They are not interchangeable, and Grade 60 costs more. A classic scam is billing Grade 60 while delivering Grade 40.
- Brand / mill. Branded, mill-certified bars (with consistent diameter and rib pattern) cost more than unbranded re-rolled steel — which can be underweight and inconsistent.
Because steel is priced by weight, the most common trick is simple: short weight. Bars that are slightly under the nominal diameter weigh less per foot, so you pay for tonnage you never received.
The four overcharging tricks to watch for
| Trick | What happens | How to catch it |
|---|---|---|
| Rate padding | Billed above the week's market rate. | Check published cement/steel rates the day of purchase. |
| Wrong grade | Grade 40 delivered, Grade 60 billed. | Insist on mill-certified, grade-marked bars; keep certificates. |
| Short weight | Under-diameter bars; you pay for missing kg. | Weigh a bundle; measure bar diameter with calipers. |
| Quantity inflation | More bags/tonnage billed than used. | Reconcile deliveries against the BOQ at every stage. |
Roughly how much you need
A reconciliation only works if you know the ballpark. For a normal residential grey structure, very rough, design-dependent figures are:
- Steel: ~3.5–5 kg per sq ft of covered area (heavier for more storeys, long spans or an over-designed structure).
- Cement: ~0.35–0.45 bags per sq ft of covered area for the grey structure.
Where to check current rates
Don't rely on a single contractor's word. Cross-check the week's rates from multiple sources — large cement manufacturers' announced prices, established hardware markets, and any reputable rate tracker — and use the brand and grade you actually agreed to, not a generic "cement" or "sariya" number.
Key takeaways
- Cement is priced per 50 kg bag by brand; steel is priced by weight, by grade and mill.
- Pin down brand and grade in writing — "cement" and "sariya" are not specifications.
- The big scams are wrong grade and short weight — weigh and measure, don't assume.
- Reconcile every delivery against the BOQ. Untracked quantity is where money quietly leaks.