What is a P&L (profit and loss) in plain English?
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- 1.What is a balance sheet? (explained without the jargon)
- 2.What is a P&L (profit and loss) in plain English?
A P&L shows whether you made money over a period. Here's every line explained in plain English — revenue, cost of sales, gross profit, overheads and net profit.
The report that answers one simple question
Of all the financial documents that get waved at founders, the profit and loss statement is the friendliest. It answers one plain question: over this stretch of time, did I make money or lose it?
That's it. A P&L (short for "profit and loss," and sometimes called an income statement) takes a period — a month, a quarter, a year — and walks you from "money that came in at the top" down to "what was actually left at the bottom." Read top to bottom, it tells the whole story of where your sales went.
The reason it looks intimidating is the row of jargon down the side: revenue, cost of sales, gross profit, overheads, net profit. But each of those is a plain idea wearing a formal coat. Let's take the coats off, one line at a time.
The shape of a P&L: a waterfall from sales to profit
Picture a waterfall. Money pours in at the top, and at each step a bit gets taken out, until what's left at the bottom is your profit. That's exactly how a P&L is laid out — you start with your sales and subtract your way down.
The standard order is:
- Revenue (money in)
- minus Cost of sales → gives you Gross profit
- minus Overheads → gives you Operating profit
- minus tax and a few other bits → gives you Net profit (what's actually yours)
You read it from the top down, and each subtraction tells you something useful about your business. Let's gloss each line.
Line by line, in plain English
Revenue (also called turnover or sales). This is all the money your business earned from doing its actual work over the period — every sale, every invoice, added up. Note: it's what you earned, not necessarily what's landed in the bank yet. If you sent a £5,000 invoice this month, it counts as revenue this month even if the customer pays next month. (Hold that thought — it's why profit and cash differ.)
Cost of sales (also called cost of goods sold, or COGS). These are the direct costs of delivering what you sold — the costs that only exist because you made that sale. For a shop, it's what it paid for the stock it sold. For an agency, it might be freelancers hired for a specific project. If the sale hadn't happened, these costs wouldn't either.
Gross profit. Revenue minus cost of sales. This is the money left after covering the direct cost of what you sold, before any of your running costs. It tells you whether the core thing you do is fundamentally profitable — are you selling things for meaningfully more than they cost you to deliver? A healthy gross profit is the foundation everything else stands on.
Overheads (also called operating expenses). These are the costs of running the business that don't rise and fall with each individual sale — rent, software subscriptions, your own salary, marketing, insurance, the accountant. You'd pay most of these whether you made one sale this month or fifty.
Operating profit. Gross profit minus overheads. This is what the business made from its normal operations, before tax and financing. It's a good honest measure of how the business is actually performing.
Net profit (the bottom line). Take operating profit and subtract the last bits — interest on any loans, and tax. What's left is net profit: the genuine, after-everything figure. This is the number people mean when they say "the bottom line," because it literally sits at the bottom. It's what the business actually made for its owners over the period.
So the journey is: everything you earned, minus what it cost to deliver, minus what it costs to keep the lights on, minus tax — equals what's truly yours. Five plain ideas, dressed up in five formal words.
A tiny example
Say you run a small online shop. Here's a simple month.
- Revenue: £20,000 (everything you sold)
- Cost of sales: £8,000 (what you paid for that stock)
- Gross profit: £12,000 (20,000 − 8,000)
- Overheads: £7,000 (rent, software, your salary, ads)
- Operating profit: £5,000 (12,000 − 7,000)
- Tax and interest: £1,000
- Net profit: £4,000 (5,000 − 1,000)
Read top to bottom, the story is clear: you sold £20,000 of goods, and after every cost, £4,000 was genuinely yours. Each line tells you something different — that your products sell for a healthy margin (gross profit), that your running costs are under control (overheads), and that the month was profitable overall (net profit).
Why the different "profit" lines matter
A common question: why three profit lines? Why not just show "profit" and be done?
Because each one diagnoses a different part of your business. If your gross profit is thin, the problem is your pricing or your costs of delivery — you're not charging enough for what it costs you to make. If gross profit is healthy but net profit is poor, the problem is your overheads — the core business works, but the running costs are eating it. Seeing the steps means you can tell where money is leaking, not just that it is. One number couldn't do that.
The P&L vs the balance sheet: film vs photo
This is the comparison that finally makes both documents click, so here it is plainly.
A P&L is a film. It covers a stretch of time — a month, a year — and shows what happened over that period: sales came in, costs went out, profit was left. Play it and you see the action unfold.
A balance sheet is a photo. It captures one single day and shows what you own and what you owe at that exact moment. Freeze the frame and you see your position.
The film shows you how you got here. The photo shows you where you're standing. You need both, and they answer different questions — "did I make money over the year?" versus "what do I own and owe right now?" (See: What is a balance sheet? →.)
The trap: a great P&L doesn't mean money in the bank
Here's the warning every founder needs stapled to their P&L. A healthy net profit does not mean a healthy bank balance.
Remember that revenue counts when you earn it, not when you get paid. So your P&L can proudly show £4,000 profit while customers still haven't paid the invoices behind it — meaning that £4,000 is sitting in their accounts, not yours. Add in tax you've collected but not yet handed over, and big purchases that the P&L spreads out over time, and you get the classic shock: profitable on paper, short of cash in reality.
The P&L tells you whether the business model works. It does not tell you whether you can make payroll on Friday. For that, you watch cash. This gap catches almost every non-finance founder out at least once, and it's worth understanding properly. (See: Profit vs cash — why you can be profitable and still broke →.)
The short version
A P&L (profit and loss statement) shows whether you made money over a period. Read it top to bottom like a waterfall: revenue (money in), minus cost of sales (the direct cost of what you sold) gives gross profit; minus overheads (your running costs) gives operating profit; minus tax and interest gives net profit — the bottom line that's genuinely yours. It's a film of a period, not a photo of a day, so it pairs with the balance sheet. And a strong P&L doesn't guarantee cash in the bank — so respect it, but watch your cash too.
Your P&L should be something you can glance at any time, not a once-a-year mystery. In Ledgers, it's built automatically from your bank feed and invoices and updated as you go — so you can see your revenue, margins and profit at a glance, without touching a spreadsheet. See your numbers without learning accounting → start free.
The piece every founder should read next: Profit vs cash — why you can be profitable and still broke →
And its companion, the photo to this film: What is a balance sheet? →
Frequently asked questions
What is a profit and loss statement?
A P&L (also called an income statement) is a report showing whether your business made or lost money over a period — a month, quarter or year. It starts with your revenue and subtracts your costs step by step down to your net profit, the figure that's genuinely yours.
What's the difference between gross profit and net profit?
Gross profit is revenue minus the direct cost of what you sold — it shows whether your core product or service is profitable. Net profit is what's left after also subtracting overheads, tax and interest — the true bottom line.
What's the difference between a P&L and a balance sheet?
A P&L is a film of a period, showing sales, costs and profit over time. A balance sheet is a photo of one day, showing what you own and owe at that moment. You need both; they answer different questions.
Does a profit on the P&L mean I have that money in the bank?
Not necessarily. Revenue is counted when you earn it, not when you're paid, so you can show a profit while customers still owe you. Tax you've collected and big up-front purchases widen the gap further. Profit is the promise; cash is what's actually in the bank.
See your numbers without learning accounting
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