The P&L, top to bottom. Fifteen minutes and you will never be lost in an accountant's email again.
12 min read · Level 2
Founders read the bottom line and miss the story in the middle. A bigger loss alongside a rising gross margin is usually a company that fixed its economics and is now deliberately investing — the opposite of what the bottom line alone suggests. One month in isolation is nearly uninterpretable; the trend across six is where the information is.
The income statement — also called the P&L — shows performance over a period. It reads top to bottom, each line subtracting from the one above:
Revenue − COGS = Gross profit − Operating expenses = Operating profit − Interest and tax = Net income
That is the whole document. Everything else is subcategories.
Because your accountant will send you one, investors will ask for one, and a founder who cannot read their own P&L is relying entirely on someone else's interpretation of their business.
It is also where you spot problems: a gross margin that has quietly fallen, an OpEx line that has doubled, a month that looks fine in the bank but is losing money underneath.
Revenue $120,000 Subscriptions $98,000 Services $22,000 COGS $(24,000) Hosting $(11,000) Payment fees $(3,500) Support $(9,500) Gross profit $96,000 (80% margin) Operating expenses $(150,000) Salaries $(112,000) Marketing $(21,000) Software & tools $(9,000) Rent & admin $(8,000) Operating profit $(54,000)
Read it in three moves. Top: revenue $120k, and note the split — most is recurring, which is good. Middle: 80% gross margin, healthy for software. Bottom: losing $54k a month, driven almost entirely by salaries.
That is a normal, fundable picture — a company deliberately spending ahead of revenue. The next question is only ever: how much runway is behind it?
First-time founders often read only the bottom line and miss the story in the middle. A shrinking gross margin is far more serious than a bigger loss, because the loss is a choice and the margin is structural.
The other mistake is comparing a single month to nothing. One month tells you almost nothing — the trend across six is where the information is.
How much revenue is recurring versus one-off? A month propped up by a single project is not the same as a month of subscriptions.
This is the single most informative line. A falling margin means something structural changed — usually more manual delivery.
You are looking for changes, not levels. A line that doubled deserves an explanation.
A $54k monthly loss is fine with 18 months of cash and an emergency with four.
Trends are the point. One month is noise, especially in a small company where one invoice moves everything.
Monthly, and definitely before any board meeting, investor update or fundraise.
Do not use the P&L to answer questions about cash — it is the wrong document. It shows what you earned, not what is in the bank. Use the cash flow statement for that.
A recurring misreading: operating loss grew, so the founder concludes it was a bad month. Gross margin had risen from sixty-two to seventy-nine percent and the extra spend was a deliberate go-to-market hire. Structurally it was the best month the company had had.
Read margin before profit. One is a fact about the business, the other is a decision about pace.
A single month's P&L cannot be judged — forty-eight thousand of revenue is excellent or alarming entirely depending on what last month was. Founders produce single-period statements because that is the software default, and then find them uninformative.
Never produce a P&L without the prior period beside it. A number with no comparison is not information.
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