Your P&L isn't your business. Here's what is.

The profit and loss statement is the document owners are handed most often and the one that answers the fewest of their questions. That isn't a criticism of accounting. The P&L was designed to report a period to an outside reader — a tax authority, a lender, a shareholder. It was never designed to help someone decide what to do next.

Ask an owner what's actually on their mind and you get a different list: can I afford this hire, is this client worth keeping, should I raise prices, will I make payroll in March. Not one of those is answerable from an income statement.

What the P&L structurally cannot tell you

• Timing. It reports a period as a block. Your obligations arrive on specific days.
• Cash. Revenue recognised isn't money collected.
• Which parts earn. Aggregated into single lines, a profitable service subsidising a loss-making one looks like one moderately profitable business.
• Capacity. Nothing about whether the team is at 60% or 95% utilised — the thing that determines whether more revenue is even possible.
• What happens next. It's a record, not a model.

The six numbers that do

1. Cash at the lowest point in the next 13 weeks

Not the balance today and not the monthly average — the trough. Every commitment you make is really a bet against that number.

2. Contribution margin by segment

Revenue minus the costs that would disappear if you stopped doing that work, cut by service line, client type, or channel. Almost every business has one segment quietly funding another, and almost no owner can name which until someone cuts the data.

3. Committed cost

The portion of your cost base you cannot change inside ninety days — payroll, leases, debt service, contracts. This is your real fixed base and it sets how much of a revenue drop you can absorb.

4. Capacity utilisation

How much of what you can deliver you are actually delivering. It tells you whether the constraint on growth is demand or headcount, which are opposite problems with opposite solutions.

5. Cash conversion

How long from doing the work to holding the money. DSO is most of it. It determines how much cash growth will consume — and therefore whether growth is safe.

6. Customer concentration

What share of revenue sits with your largest one, three and five customers. Not a performance measure, a risk one. At 40% in a single client, most other decisions should be made more conservatively than the P&L suggests.

Why standard reporting doesn't produce these

Because standard reporting is built for an audience, and the audience is external. A chart of accounts organised for the tax return groups costs by their tax treatment, not by which part of the business consumed them. Revenue lands in one or two lines because that's all the return needs.

Most financial reporting is built for an audience. It should be built for a decision.

None of the six numbers above require exotic accounting. They require a chart of accounts organised around how the business actually operates — revenue cut by segment or contract, costs mapped to the department that incurred them — and a forecast sitting alongside the history. Both are structural choices, made once.

Where to start

Pick two. For most owners the pair that changes the most decisions is the thirteen-week cash trough and contribution margin by segment — one tells you what you can safely commit to, the other tells you what's worth committing to.

Keep the P&L. File it, give it to your lender, use it for tax. Just stop expecting it to answer questions it was never built to answer.