The maths of a price rise: why 5% on price beats 5% more sales
When a business wants to make more money, the instinct is almost always the same: sell more. Chase more leads, run a promotion, take on more jobs. Growing the top line feels like the obvious lever.
But there is a quieter lever that most owners rarely touch, and it does far more for your profit with far less effort. It is your price.
A modest price rise and a modest jump in sales can look identical on the revenue line. Underneath, they behave completely differently. Once you see the maths, it is hard to unsee.
The two options, side by side
Let us take a business with round numbers so the pattern is easy to follow.
Say you turn over $400,000 a year. Your direct costs, the materials, subcontractors and anything that rises when you do more work, run at 60% of revenue, so $240,000. That leaves a gross profit of $160,000, a 40% gross margin. Your fixed overheads, the rent, software, insurance and wages that stay put whether you are busy or quiet, come to $120,000. So your net profit is $40,000, or 10% of revenue.
Now compare two ways to add 5% to your revenue.
Option A: lift your prices by 5%, same amount of work. Revenue climbs to $420,000. Your direct costs do not move, because you are doing exactly the same volume of work, so they stay at $240,000. Gross profit rises to $180,000. Take off the same $120,000 of overheads and your net profit is now $60,000.
Option B: win 5% more sales, same prices. Revenue also climbs to $420,000. But this time your direct costs rise with the extra work, up 5% to $252,000. Gross profit is $168,000. Take off the $120,000 of overheads and your net profit is $48,000.
Same revenue, two very different results. The price rise added $20,000 of profit. The extra sales added $8,000.
Why the gap is so wide
The reason is simple once you spot it. When you raise your price, there are no extra costs attached to that increase. You are not buying more materials or putting in more hours, so almost every dollar of the rise drops straight to the bottom line.
When you grow by selling more, every extra sale drags its costs along with it. You earn the margin on the new work, not the whole value of it. In this example the price rise did two and a half times as much for profit as the same lift in sales, and it did it without a single extra job to deliver.
That last point matters more than the numbers. More sales means more to make, more to deliver, more to invoice and chase, more wear on you and your team. A price rise asks nothing extra of anyone. It is the same business, quietly earning more.
You can lose a bit of volume and still come out ahead
The worry with any price rise is losing customers. It is a fair concern, but the maths is more forgiving than it feels.
With a 40% gross margin, a 5% price rise means you could lose around 11% of your sales volume and still make the same gross profit as before. In other words, if one customer in nine walked away, you would be no worse off, and you would be doing less work to earn it. In practice, a fair, well handled increase rarely costs you anywhere near that many.
Where to start
You don't need to raise every price by 5% tomorrow. The point is to see price as a lever worth pulling, not one to leave untouched for years while your costs creep up underneath you.
Start by knowing your real gross margin, so you can see what each option actually does to your profit. Look at where your prices have sat still the longest. And when you do move, move with confidence, because the numbers are on your side.
If you want a hand working out what a price rise would do to your own figures, that is exactly the kind of thing we help business owners with. You can read more in our guide to protecting your margin, or get in touch and we will run the maths with you.