Why this matters
Your profit & loss statement — your "P&L," also called an income statement — shows the money you earned and spent over a period of time. It's the single best answer to the question: is this business actually working?
Not whether you're busy. Not whether sales are up. Whether, after everything, you keep anything.
Most owners avoid it because it looks intimidating. But underneath the formatting, every P&L tells the same simple story, top to bottom. Once you can read it, you stop seeing a wall of numbers and start seeing exactly where money is being made or lost.
How to think about it: the three-step story
Read your P&L as a story that gets smaller as it goes down the page. Each step takes something away, and what survives to the bottom is what you actually keep.
Step 1 — Start with your income. Everything you earned in the period. The top line.
Step 2 — Subtract the cost of delivering it, and you get GROSS PROFIT. This is the first section of the report: your income accounts, minus your cost of goods sold (COGS) — the direct costs of producing your product or delivering your service. Materials, stock, the contractor who did the job.
Gross profit = Income − COGS
Gross profit answers: does the core thing I sell actually make money?
Step 3 — Subtract your running costs, and you get NET PROFIT. This is the second section: your operating expenses — the costs that aren't tied directly to producing what you sell. Payroll and wages, advertising, insurance, rent, software. The everyday cost of being open.
Net profit = Gross profit − Operating expenses
Net profit is your business's overall profitability. If it's negative, that's a net loss.
That's the whole structure. Income, minus what it cost to deliver, minus what it costs to keep the doors open. Two subtractions, two answers.
The two numbers that tell you the most
Raw amounts are hard to compare month to month, especially if your sales move around. Turn them into margins — the percentage of income you keep — and they become far more useful:
Gross profit margin — what percentage of your income survives COGS.
Gross profit ÷ Income × 100
This tells you whether your pricing and delivery costs work. A weak gross margin means you're either charging too little or paying too much for what you sell — and no amount of cost-cutting elsewhere will fully rescue it.
Net profit margin — what percentage of your income you ultimately keep.
Net profit ÷ Income × 100
This tells you whether the whole business works, overheads included.
A worked example
Omar runs a small retail shop. Here's one month, read as the three-step story:
| Amount | What it tells Omar |
Income | 20,000 JOD | He sold 20,000 this month |
− Cost of goods sold | 12,000 JOD | The stock cost him 12,000 |
= Gross profit | 8,000 JOD | 40% gross margin — he keeps 40 fils of every dinar after paying for stock |
− Operating expenses | 6,000 JOD | Rent, wages, advertising, insurance |
= Net profit | 2,000 JOD | 10% net margin — what the business actually earned |
Now Omar can read it, not just look at it. His 40% gross margin is workable for retail but not generous — his buying prices leave limited room. And look at the squeeze in the middle: of the 8,000 gross profit he worked so hard for, 6,000 is eaten by running costs. His overheads, not his stock, are the biggest pressure on what he takes home.
That single observation tells him where to act. He has two levers, and now he knows which one matters more: lift the gross margin (raise prices, negotiate better with suppliers), or get the 6,000 of operating expenses down. Without reading the P&L, he'd just know "I made 2,000." With it, he knows why.
How to read the movement
One month in isolation tells you little. The real power is comparing periods — and when a margin moves, it points you straight at the cause:
Gross margin drops → look at pricing or supplier costs. You're charging too little, or your COGS crept up.
Gross margin holds but net margin drops → look at overheads. Something in payroll, advertising, rent, or insurance grew faster than sales.
Both margins hold but net profit falls → your sales volume dropped, not your economics. The business model is fine; you just sold less.
Watch the direction of these two margins over time and you'll see problems forming while they're still small enough to fix.
One thing to know: your P&L is not your bank balance
Here's the trap that catches owners out. NuMetric records your income when you issue an invoice, not when the customer pays — and records costs when you incur them, not when the money leaves. This is called accrual accounting, and it's the correct, standard method: it shows what your business genuinely earned in a period, rather than just what happened to move through the bank.
But it means a profitable month on your P&L can still be a month where your bank balance went down. Your profit is real — some of it is just sitting in unpaid invoices, waiting to be collected.
So read your P&L to answer "is the business working?" — and check your cash separately to answer "can I pay what's due?" They're different questions.
Do this in NuMetric
Your profit & loss statement is built for you automatically — you never have to assemble it by hand. Open Get the big picture to see it laid out: the overview of income, expenses and net profit for your date range at the top, then income and COGS building to gross profit, then operating expenses down to net profit.
Compare two periods to watch your margins move. When a line looks wrong and you want to know why, drill into the underlying transactions with Dig deeper.