29/04/2025
Do you actually know what your Gross Profit Margin is?
If you don’t, don’t worry. Most trade business owners don’t get taught this stuff… but once you know how to work it out, it can be a massive help to keeping your business profitable.
Let’s break it down:
1. First, what is Gross Profit?
It’s your sales minus your direct costs (materials, subcontractors, wages for the lads on the tools, etc).
Direct costs are any costs associated with doing the actual job/project
2. Then, Gross Profit Margin =
Gross Profit ÷ Sales
To get it as a percentage, you multiply that number by 100.
Let’s do an example:
• Sales for the month: £50,000
• Direct costs: £32,000 (materials, subs, labour)
• Gross Profit = £50,000 - £32,000 = £18,000
• Gross Profit Margin = £18,000 ÷ £50,000 = 0.36
• As a %, that’s 36%
That means for every £1 you bring in, 36p is left after paying for the job, before overheads like vans, phones, insurance etc.
Why it matters:
If your margin’s too low, you’re grafting hard for not a lot left over.
Knowing your margin helps you price properly, plan for profit, and grow without chaos.
Keep an eye on it, it’s one of the most important numbers in your business.