Markup vs Margin for Trades: The Difference That Costs You Money

A builder tells his accountant he runs a 30% margin. The accountant looks at the year’s accounts and finds 23%. Nobody has stolen anything. The builder has been adding 30% to his costs, which is a markup, and calling it a margin, which it is not. The seven points between the two numbers are the difference between a business that is building a buffer and one that is treading water, and it has been happening on every job for years.

The two words mean two different things

Markup is the amount you add to cost, expressed as a percentage of cost. A job that costs $1,000 and sells for $1,300 has a 30% markup.

Margin is the profit expressed as a percentage of the price. That same job has a profit of $300 on a price of $1,300, which is a 23.1% margin.

Same job, same dollars, two different percentages. The margin is always the smaller number, and the gap between them grows as the percentages rise.

The conversion

To turn a markup into a margin: margin = markup / (1 + markup). A 35% markup is 0.35 / 1.35, which is 25.9%.

To turn a margin into a markup: markup = margin / (1 – margin). A 30% margin is 0.30 / 0.70, which is 42.9%.

A few that are worth memorising:

• 20% markup is a 16.7% margin
• 25% markup is a 20.0% margin
• 35% markup is a 25.9% margin
• 50% markup is a 33.3% margin
• 100% markup is a 50.0% margin

If you want a 30% margin, you need a 42.9% markup. If you want 40% margin, you need 66.7%. Most tradies who say they “put 30% on” are earning a 23% margin and have never checked.

Why the gap matters in a trade business

Margin is the number that pays for everything that is not the job. Overheads that were not recovered on the job, a quiet fortnight, a vehicle repair, the tax bill, and eventually a wage that looks like the wage you would earn working for someone else. If you think you have 30% of every job to work with and you actually have 23%, every plan you make is about a quarter too optimistic.

It also matters when you compare yourself to other businesses. Suppliers talk in markup. Accountants talk in margin. A supplier who tells you “most of our customers put 25% on materials” is describing a 20% margin. If you then set a 25% margin target on materials to match, you have just raised your materials prices above the market without meaning to.

Where the customer sees it

Customers never see your markup or your margin. What they see is a price, and what they rate is whether it felt fair for the work. Across 20,286 publicly posted reviews of NZ electricians, plumbers and painters, value is the lowest-scoring of the four rated dimensions for every trade: 95.5 out of 100 for plumbers, 97.1 for electricians and 97.8 for painters, with quality higher in every case. The scores are high, but value is consistently the soft spot.

The lesson is not to cut the margin. It is that a business running on a 23% margin while believing it has 30% tends to make up the shortfall in the worst possible way: a bigger-than-expected invoice on the next job, or a quote that creeps once the work has started. Those are exactly the behaviours that pull the value score down. A business that knows its real margin can price cleanly up front and leave the number alone.

How to fix it

Decide the margin you want on the job and convert it to a markup once. Write the markup on your costing sheet and use it for every line, or set different markups for labour, materials and subcontractors if you want to stay sharper on big-ticket supply. At the end of the job, work out the actual margin: profit divided by price. Compare it to the target. That comparison, done on every job for a few months, will tell you more about your business than any report.

The job costing and markup sheet in our resource library has a markup-to-margin converter built into the workbook, with the markup applied per line and the actual margin checked at the bottom, so the arithmetic is never done by memory. The hourly rate calculator converts either way on the page.

The two words will keep getting used interchangeably by people around you. Make sure you know which one you mean.