Most founders open their profit and loss statement (P&L) once a year for the auditor, then forget it. That is a costly habit. The P&L is the cleanest single view of whether your business model actually works, and read correctly it tells you where to push and where to stop spending. In India your annual P&L follows a statutory shape, the Statement of Profit and Loss prescribed under Schedule III of the Companies Act, 2013 (see Section 129), but you should read the same lines every month, not once a year, to actually run the business.
First, the P&L is not your bank statement
The most expensive mistake a first-time founder makes is treating profit as cash. A P&L is prepared on an accrual basis: revenue is recognised when you earn it by delivering the goods or service, under Ind AS 115 (or AS 9 for smaller companies), not when the money lands in your account. So you can show a profit while your bank balance falls, or burn cash while looking loss-making on paper. Two lines cause most of the confusion:
- GST is not revenue. The GST you charge on an invoice (most services sit in the 18 percent slab after the GST 2.0 rate changes effective 22 September 2025) is output tax you owe the government. It is a liability, not income. Your "Revenue from operations" line is shown net of GST, and the cash in your account includes tax that is not yours to spend.
- Depreciation is not cash. Depreciation and amortisation spreads out money you already spent on assets. It reduces reported profit, but no cash leaves the business that month. Never confuse it with burn.
The lines that should drive your decisions
Read the statement top to bottom and treat these as your operating dials:
- Revenue from operations. Your true top line from the core business, kept separate from "Other income" such as interest on deposits. Growth here is real traction. Growth padded by other income is not.
- Gross margin. Revenue minus the direct cost of delivering it (cost of materials consumed, or cost of services). This is the single most important operator number, because it tells you how much of every rupee of sales is left to cover the rest of the company. A thin gross margin cannot be fixed by simply selling more.
- Employee benefits expense. Usually your largest and most controllable line. Track it as a percentage of revenue and watch whether that ratio falls as you scale.
- Finance costs and other expenses. Interest on borrowings, plus rent, cloud, marketing, and the rest. Read each against revenue, not in isolation.
Revenue minus your operating expenses, down to depreciation, gives you operating profit, roughly the day-to-day engine of the business, with finance costs and tax sitting below that line. That is the number you can actually influence this quarter, so it deserves the most attention.
Read it as a trend, per unit, and against plan
A single month's P&L means little. Three habits turn it into an operating tool:
- Trend: line up the last six to twelve months side by side and watch the direction of each ratio, not the absolute rupees.
- Per unit: divide the key lines by customers, orders, or users, so you can see whether unit economics improve or decay as volume grows.
- Against plan: compare actuals to the budget you set. The gap, and the reason for it, is where your next decision lives.
Close your books every month within a week or two. Look first at revenue net of GST and gross margin, then at people cost as a share of revenue, and finally at the cash the P&L does not show. Do this consistently and the statement stops being a compliance chore and becomes the instrument you steer with.