Infrastructure companies like L&T live and die by their order book. Unlike a consumer products company where revenue visibility is one quarter, an EPC (engineering, procurement, construction) company's future revenue is largely determined today — by the projects it has won and is executing.
Order Book Composition: Not All Orders Are Equal
L&T's ₹5 lakh crore+ order book is spread across: Infrastructure (~40% — roads, metro, airport, water), Hydrocarbons (~22% — oil & gas EPC, primarily international), Buildings & Factories (~15%), Heavy Civil (~12%), and Others including Defence and Power (~11%).
Book-to-Bill Ratio and Revenue Visibility
The book-to-bill ratio (order book ÷ trailing twelve-month revenue) tells you how many years of work are in the backlog. At ₹5 lakh crore order book and ~₹2.2 lakh crore trailing revenue, L&T's book-to-bill is approximately 2.3x — meaning roughly 2.3 years of revenue visibility. For an EPC company, a book-to-bill above 2.0x is generally considered healthy.
- Order book FY25: ₹5 lakh crore+ (largest ever)
- Book-to-bill ratio: ~2.3x (healthy)
- Order inflow growth FY25: ~18%
- EBIT margin band: 8.5-10% (target: 10%+ by FY27)
- International order book: ~35% (hydrocarbons, MENA heavy)
🔍 BBS Insight
For L&T, the order book is the business — read it every quarter before reading the P&L. Specifically: is new order inflow growing faster than revenue (book-to-bill expanding)? Is the mix shifting toward higher-margin segments? Is working capital intensity improving (cash flow converging with profit)? If all three are trending positively, the stock's 15-18x P/E is reasonable for the growth and quality on offer.