Most owners I meet have a Profit and Loss and do not really read it. They look at the bottom number, feel either relieved or worried, and close it.
The bottom number is the least useful part. Here is how to read the rest, in the order that actually tells you something.
What the P&L is, and what it is not
The Profit and Loss statement, also called the income statement, covers a period of time: a month, a quarter, a year. It answers one question. Did the business make money over that stretch?
It is not a picture of your cash. That is the balance sheet, and confusing the two causes more owner anxiety than any other reporting mistake. Your P&L can show a good month while your bank account is nearly empty, and nothing is wrong with either statement.
The reasons for that gap are worth knowing up front, because they are the things a P&L deliberately does not show:
- Loan principal payments reduce your cash but are not an expense. Only the interest portion is.
- Owner draws take money out without being an expense.
- Equipment purchases may be capitalized and depreciated over years rather than expensed the month you paid.
- Unpaid invoices count as revenue when you bill them, if you are on accrual, even though no money arrived.
None of that is a flaw in the report. It just means the P&L answers “did we make money,” not “do we have money.”
Read it top to bottom, in this order
Revenue
The top line. What you billed or collected, depending on your accounting method.
The first thing to check is not the size of the number but whether it is real. Two things routinely inflate it: transfers between your own accounts recorded as income, and loan proceeds landing as revenue. Both are common in books that have not been reconciled, and both make you look like you earned money you did not.
If revenue looks higher than the work you remember doing, that is where to look first.
Cost of Goods Sold
The costs directly tied to delivering what you sold. Materials, subcontractors on a job, merchant fees on a sale.
The test is whether the cost would exist if you had not made the sale. Your rent happens either way, so it is not COGS. The lumber for a specific job would not, so it is.
Not every business has meaningful COGS. A consultant may have almost none. A contractor’s is most of the P&L.
Gross Profit
Revenue minus COGS, and the number most small business owners should be watching instead of the bottom line.
Gross profit is what is left to cover everything else. As a percentage of revenue, it tells you whether your pricing and your job costs are in a sensible relationship. When that percentage slides month over month, your pricing is drifting out of line with your costs, and it will show up in the bottom line months later.
Catching it here is the whole reason to read the report in order.
Operating Expenses
The costs of being open regardless of sales: rent, software, insurance, advertising, office costs, wages not tied to a specific job.
Scan for two things. Subscriptions you forgot you had, which quietly compound. And any category that is much larger than you expected, which usually turns out to be a miscategorization rather than genuine spending.
Net Profit
Revenue minus everything. The number everyone jumps to first.
It is worth knowing, and it is the least actionable line on the page, because by the time it moves, the cause is several steps upstream. It is a result, not a lever.
The comparison that makes it useful
One month alone tells you almost nothing. Put several side by side and the report starts working.
Most software will show month over month or year over year columns. Turn that on. What you are looking for is not any single figure but direction: gross profit percentage sliding, an expense category creeping, revenue that is flat while costs are not.
A trend over three months is information. A single month is noise.
The numbers that mislead people
A big revenue month that was mostly a transfer. Covered above, and worth repeating because it is the most common error I find.
Profit that ignores your own pay. If you take owner draws rather than a salary, your labor is not in the expenses. A P&L showing $60,000 profit for a year of your full-time work is not $60,000 of profit; it is your wage plus whatever is genuinely left over.
A category that suddenly went quiet. An expense that stops appearing usually means it started being recorded somewhere else, not that it stopped happening.
Profit in a month you did not get paid. On accrual accounting, invoicing creates revenue. A great month on paper can be a month where nothing was collected.
What to actually do each month
Fifteen minutes, once a month, in this order:
- Confirm every account is reconciled for the month. Unreconciled books make everything below this meaningless.
- Check revenue against the work you know you did.
- Calculate gross profit as a percentage and compare it to prior months.
- Scan operating expenses for anything unfamiliar or unexpectedly large.
- Look at net profit last, and read it as a result of the four things above.
That routine catches most problems while they are still small.
If the numbers do not look like your business
The usual cause is not a bad report. It is that the underlying books have drifted, most often because nothing has been reconciled in months.
A P&L is only as good as the data under it. If yours does not match the business you are living in, fix the books first, then read the report. Reading a report built on unreconciled data just gives you confident wrong answers.
If you would like to see what an accurate one looks like for your business, send me three months of statements and I will build you a real Profit and Loss from them, free, and walk you through it line by line.