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Free calculator · Business

Discount Cost Calculator

A 10% discount sounds small. It is not 10% off your profit, it is 10% off your price, and the profit is what pays you. See what a discount really costs, and how much extra work you would need to win to get that profit back.

The short version

Your costs do not shrink when you drop the price, so the whole discount comes out of your profit. On a job with a 30% margin, a 10% discount wipes out a third of the profit. To earn the same profit at the lower price you would need to do 50% more jobs like it.

Extra work needed = Discount ÷ (Margin − Discount)  ·  Profit wiped out = Discount ÷ Margin
1. The job

The price and what you keep from it.

$
What you would normally charge
%
Profit as a share of the price, after materials, labour and overheads
2. The discount

What you are thinking of giving away.

%
jobs
Used to show the monthly effect if the discount becomes your habit
Share of your profit the discount wipes out
0%
of the profit on this job
Price after discount$0
Profit before discount$0
Profit after discount$0
Extra work needed to earn the same profit0
Jobs a month needed at the discount price0
Monthly profit, before and after$0 to $0

A guide, not financial advice. Figures are estimates. It assumes your costs stay the same when the price drops, and that extra work comes at the same margin and the same price.

A discount comes straight out of profit

The materials, the labour and the van cost the same whatever you charge. So when the price drops, the whole discount is lost from the profit, not from your costs. The smaller your margin, the bigger the bite.

A $1,000 job at a 30% margin earns $300. Give 10% off and the price is $900, but the job still costs $700 to do. Profit falls to $200. That is a third of your profit gone for a 10% discount.

Winning it back takes more work than you think

To earn $300 again at $200 a job you need 1.5 jobs for every one you did before. That is 50% more work, more quoting, more driving and more hours, to end up exactly where you started. Read the full thinking in What a discount really costs you.

When the discount is as big as your margin

If you discount by your whole margin, the job makes no profit at all. Go beyond it and you pay to do the work. No amount of extra volume fixes that, so the calculator tells you plainly when a discount can never be won back. Not sure of your margin? The Quote & Profit Calculator shows it job by job.

Questions tradespeople ask

Is a 10% discount really 10% off my profit?
No. It is 10% off the price, and your costs stay the same, so the whole amount comes out of profit. With a 30% margin, a 10% discount removes a third of your profit on the job.
How much extra work do I need to win to make up for a discount?
Divide the discount by your margin minus the discount. A 10% discount on a 30% margin is 10 divided by 20, so 50% more work. A 5% discount on the same margin needs about 20% more.
What if my discount is bigger than my margin?
Then each job loses money, and winning more of them only loses more. A discount equal to your margin leaves you with no profit at all. It can never be won back with volume.
What is a profit margin, and where do I find mine?
Margin is the profit you keep as a share of the price, after materials, labour and overheads. Work it out from a recent job, or use the Quote and Profit calculator to see it on a live quote.
Is there anything better than cutting my price?
Often, yes. Reducing the scope, offering payment terms that suit you, or filling quiet off-peak slots all give the customer a reason to say yes without cutting your hourly return. The guide covers each one.

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