Is the margin this calculator shows the same as markup?▾
No — they are different numbers computed from different bases, and mixing them up is a common, costly tendering mistake. Margin = Profit ÷ Selling Price (what this calculator computes — direct cost, overhead and contingency are entered as a % of the tender/contract value, and margin is what remains of that 100%). Markup = Profit ÷ Cost (profit added on top of cost as a base). For example, a cost of ₹80 marked up by 25% gives a ₹100 selling price — but the margin on that ₹100 sale is only 20% (₹20 profit ÷ ₹100 price), not 25%. If you ask for a 20% margin but your pricing sheet actually applies a 20% markup, you will under-price the tender by exactly this gap. This calculator always works in margin terms (% of contract value), never markup, so entering direct cost/overhead/contingency as percentages of the tender value gives a mathematically correct margin figure.
What is the minimum viable tender margin for a construction project?▾
This calculator uses 8% net margin as the minimum viable threshold — Rebota methodology, disclosed as such. It is not an externally cited benchmark. The appropriate minimum varies significantly by project type, complexity, client, and contractor overhead structure. The key principle is that "minimum viable" should be after deducting LD risk, material escalation, and working capital cost — not a gross margin figure.
How is working capital cost calculated as a % of contract?▾
Working capital cost = Monthly outflow × (Payment cycle days ÷ 30) × OD rate × (Project months ÷ 12), expressed as a % of contract value. For a ₹1 crore contract at ₹5.6L/month, 60-day cycle, 13% p.a., 18 months: ₹5.6L × 2 × 0.13 × 1.5 = ₹2.18L, which is 2.18% of contract. This cost is real — it is incurred via OD or personal capital — but almost never appears as a tender line item.
What is an escalation clause and how does it protect margin?▾
An escalation or Variation of Price (VoP) clause contractually passes material price increases through to the client, typically using a published price index (WPI for steel/cement, government notified rates for fuel). With an escalation clause, if steel prices increase 12% during the project, the contractor's bill increases proportionally — protecting margin. Without it, the full increase comes from the contractor's margin. Escalation clauses are standard in CPWD and most state PWD contracts but are often absent in private contracts.
How do I reduce LD exposure before signing?▾
Three levers at contract stage: (1) Negotiate an LD cap — typically 5–10% of contract value maximum, beyond which no further LD accrues. (2) Build programme float — include buffer in the submitted construction programme so the earliest contractual completion date is achievable even with 2–4 weeks of unexpected delay. (3) Clearly define client obligations (design issue dates, access dates, approvals) — delays caused by the client's failure to meet these dates give grounds for an Extension of Time (EoT) claim that removes LD for those weeks.
What is an Extension of Time (EoT) claim?▾
An EoT claim requests an extension of the contractual completion date due to delays caused by events outside the contractor's control — client-caused delays (late drawing issue, access denial, scope changes), force majeure events, or other specified relief events. A granted EoT extends the completion date, preventing LD from accruing for the extended period. EoT claims must be raised contemporaneously — most contracts require written notice within 14–28 days of the delay event. Late notice is the most common reason valid EoT claims are rejected.
Should I front-load material procurement to hedge escalation risk?▾
Partially, where practicable. Steel and cement can be purchased and stored at the start of the project to lock in current prices — but only for quantities that can be properly stored without deterioration risk. The hedge must be weighed against storage cost, inventory financing cost, and spoilage risk (particularly for cement). For steel on large projects, buying the majority of structural steel early is a widely used escalation hedge.
How do I know if a tender is competitively priced without sacrificing margin?▾
The right framework: (1) Price all costs correctly at current rates; (2) Add identified risk costs (LD × probability + escalation + WC cost) as explicit line items; (3) Add the minimum viable margin; (4) Compare the total against the estimated competitive price range. If your floor (minimum viable net margin price) is above the market, either the project is unprofitable for any bidder at market rates, or your cost base needs improvement. Cutting margin below the net minimum to win is not competitive — it is pricing in a loss.
What contingency is appropriate for different project risk levels?▾
Low risk (well-defined scope, proven site, similar to past projects): 2–3%. Medium risk (some site uncertainty, first-time client, moderate programme pressure): 3–5%. High risk (new site type, significant programme uncertainty, first-time contract type): 5–8%+. Contingency should cover the probability-weighted expected value of identified risks plus a buffer for unidentified ones — not be a fixed percentage applied regardless of project characteristics.
