What is Gross Profit?
Gross profit is your revenue minus the direct costs of producing your goods or services (cost of sales). It's calculated before operating expenses.
Example
You sell products for £100k, the products cost you £40k to buy/make. Gross profit = £60k.
Key Dates
Calculated in your P&L statement
How Gross Profit Works in Practice
Gross profit is the first profit figure in your Profit and Loss statement. It represents your total revenue minus the direct costs of delivering your goods or services, known as cost of sales or cost of goods sold (COGS). It tells you how much money you make from your core business activity before paying for overheads like rent, utilities, admin staff, and marketing.
For a product-based business, cost of sales includes the purchase price of goods, raw materials, manufacturing costs, and direct labour involved in production. For a service business, it typically includes the direct labour costs of delivering the service, subcontractor costs, and any materials used. It does not include overhead expenses like office rent, insurance, accounting fees, or director's salary -- those come later in the P&L.
The gross profit margin (gross profit divided by revenue, expressed as a percentage) is one of the most watched financial metrics. It tells you how efficiently your business converts revenue into profit at the product or service level. A declining gross margin suggests your costs are rising faster than your prices, or you are discounting too heavily. Industry benchmarks vary widely -- a consulting firm might have 60-80% gross margins, while a retailer might operate at 20-40%.
Gross profit is also the starting point for understanding whether your business model is viable. If your gross profit is not large enough to cover your overhead expenses, no amount of cost-cutting on overheads will make the business profitable. You would need to either increase prices, reduce direct costs, or change your business model entirely.
Step by Step
To calculate gross profit, take your total revenue for the period and subtract all direct costs of sales. The formula is: Gross Profit = Revenue - Cost of Sales. This figure appears near the top of your P&L statement, after revenue and cost of sales but before operating expenses.
For accurate gross profit calculation, you need to correctly classify costs as either direct (cost of sales) or indirect (overheads). Direct costs are those that would not exist if you did not make the sale -- the product you bought to resell, the subcontractor you hired for the project, the raw materials you used. Indirect costs exist regardless of any individual sale -- your office lease, your accountant's fee, your company insurance.
Gross profit margin is calculated as (Gross Profit / Revenue) x 100. Track this monthly to spot trends. If your margin is dropping, investigate whether it is due to price pressure, supplier cost increases, or a change in your product/service mix towards lower-margin offerings.
Practical Tips
- Track your gross profit margin monthly, not just at year end -- catching a declining margin early gives you time to act
- Review your cost of sales classification with your accountant to ensure expenses are in the right category
- If your gross margin is below your industry benchmark, investigate whether you can renegotiate supplier terms or increase prices
- For service businesses, track gross margin per project or client to identify which work is most and least profitable
Common Mistakes to Avoid
- Including overhead expenses like rent and insurance in cost of sales, which understates your gross profit
- Not including all direct costs (like subcontractor fees or delivery costs) in cost of sales, which overstates gross profit
- Ignoring gross profit margin trends and only looking at the absolute gross profit figure
- Confusing gross profit with net profit -- gross profit does not account for overheads, interest, or tax
Frequently Asked Questions
What is the difference between gross profit and net profit?
Gross profit is revenue minus direct costs of sales only. Net profit is what remains after deducting all expenses including overheads, interest, and tax. Gross profit tells you about the profitability of your products or services; net profit tells you about the profitability of the entire business.
What should my gross profit margin be?
It varies significantly by industry. Service businesses typically have 50-80% gross margins. Retail businesses might see 20-50%. Manufacturing often operates at 25-45%. The key is to track your own margin over time and compare against industry benchmarks for your SIC code.
Do I pay tax on gross profit or net profit?
Corporation Tax is calculated on taxable profit, which is closer to net profit (after all allowable deductions). You do not pay Corporation Tax on gross profit. However, your gross profit must be large enough to cover overheads and still produce a net profit.
What counts as cost of sales for a service business?
For service businesses, cost of sales typically includes direct labour costs for delivering the service, subcontractor fees, software or tools used specifically for client delivery, and travel costs directly related to client projects. General overheads like office rent are not cost of sales.
Can gross profit be negative?
Yes. If your cost of sales exceeds your revenue, you have a negative gross profit (gross loss). This is a serious problem because it means your business loses money on every sale before even paying overheads. You need to urgently review pricing, supplier costs, or your business model.
Source: HMRC Business Income Manual - trading profits: https://www.gov.uk/hmrc-internal-manuals/business-income-manual/bim30000
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