How to Calculate Business Profit

Revenue is the number that gets celebrated and the one that tells you least. A business can double its sales and still lose money, and it can grow more slowly than a competitor while keeping far more of what it earns. Profit is what remains after the costs of earning that revenue are taken out, and there is more than one profit figure worth knowing.

This guide covers the two that matter most, how to calculate each, and how to read them without flattering yourself.

Revenue is not profit

Revenue, sometimes called turnover or sales, is the total invoiced for goods and services before anything is deducted. It measures activity.

Profit is what is left after costs. It measures whether the activity was worth doing.

The confusion between them is not trivial. A business with 500,000 of revenue and 2 per cent net profit keeps 10,000; a business with 200,000 of revenue and 12 per cent net profit keeps 24,000. The smaller business has more money, more resilience, and usually far less risk.

Gross profit and net profit

Two deductions produce two profit figures, and they answer different questions.

Gross profit is revenue minus the cost of goods sold — the direct costs of delivering what you sold. For a product business that means stock, materials, packaging and inbound freight. For a service business it usually means the cost of the people delivering the work.

Gross profit = revenue - cost of goods sold.

Gross profit tells you whether the core offer is viable before the cost of running the organisation is added. A business with a thin gross profit has nothing left to pay for rent, software, marketing or its own salary.

Net profit: after everything

Net profit is what remains after all operating costs are deducted: overheads, salaries, marketing, insurance, professional fees, depreciation and interest. Tax usually sits below that line in management accounts, and the rules on how it is treated vary by jurisdiction.

Net profit = gross profit - operating costs.

This is the figure that either stays in the business or leaves it. It is also the figure a lender or a buyer will ask about, and the one to use when you ask whether the year was actually good.

Worked example: a month with 12,000 in sales

Take a small business that invoices 12,000 in a month.

The direct costs of the work — materials, subcontractor time and delivery — come to 7,000. Gross profit is 12,000 - 7,000 = 5,000, a gross margin of 41.7 per cent.

Overheads for the month are 3,500: rent, software, insurance, a part-time administrator and marketing.

Net profit is 5,000 - 3,500 = 1,500. As a share of revenue, that is 12.5 per cent.

The same 12,000 of sales supports a very different business depending on the two deductions. If overheads had been 4,500 instead of 3,500, net profit would have been 500 — still afloat, but barely. If direct costs had risen by 10 per cent to 7,700, gross profit would have fallen to 4,300 and net profit to 800, a 47 per cent drop from a 10 per cent cost increase.

Reading the two figures together

Gross margin shows how much room the offer leaves. Net margin shows how much of that room the organisation consumes.

A high gross margin with a low net margin points at overheads: the work is profitable but the business around it is expensive. A low gross margin with a normal net margin points at the offer: there is little room for error, and a single large discount or cost increase will erase the profit.

Track both monthly rather than annually. Twelve months of data hides the month where a large job went wrong, and that month usually explains the year.

Common mistakes

• Counting revenue as earnings. An invoice is not money in the bank, and a sale on 60-day terms does not pay this month's costs.
• Leaving owner's drawings out of overheads. If the business must pay you, that cost belongs in the calculation; if it does not, the profit figure is flattering rather than accurate.
• Mixing capital purchases with running costs. A laptop or a van is not a monthly expense in the way that rent is; treating it as one distorts both months.
• Forgetting payment fees and commissions. Card fees, platform commissions and referral fees are real costs of the sale.
• Ignoring tax. Net profit is calculated before tax in most management accounts. What you can spend is what remains after it, and the rules vary by jurisdiction, so confirm the treatment locally.

Checking your own numbers

Put your last three months of revenue and direct costs into a profit calculator and compare the result with your bank balance. If the two do not reconcile, the gap is usually a cost you have not counted — a subscription, a fee, or your own time.

Then run the same figures through a profit margin calculator to see the percentages. Absolute profit tells you whether you made money; the margin tells you how much room you have to absorb a bad month.