Business
Discount Calculator
Works a discount and what it costs, where the margin effect is the real figure.
Result
Discounts come out of profit, not revenue. On a 30% margin job, a 10% discount removes a third of the profit, which is why blanket discounting is so damaging.
Get a Free Business AuditHow the calculation works
The discounted price and the amount off, with the effect on margin and the additional volume needed to produce the same gross profit. A discount comes entirely off margin, which means the volume required to break even on it is far more than the discount percentage suggests.
What moves the number
- Starting margin, which determines the severity.
- Discount percentage.
- Whether volume actually responds.
- Whether the discount becomes the expected price.
Where this one goes wrong
On a thin margin a modest discount requires a large volume increase just to stand still, and that volume increase has to be real rather than hoped for, which is why discounting is so much more dangerous in low-margin businesses. Calculate the break-even volume before offering anything. The lasting cost is that a discount repeated becomes the price customers expect, which means the margin is gone permanently rather than for a promotion.
Before you quote
- Calculate the break-even volume increase first.
- Check the starting margin before deciding a discount is affordable.
- Avoid repeating a discount until it becomes the expected price.
Questions
About this calculator
How much extra volume does a discount need?
Far more than the discount percentage, because the discount comes entirely off margin. On a thin margin a modest discount can require a large volume increase just to produce the same gross profit, and that increase has to be real.
Why is discounting worse in low-margin businesses?
Because the discount is a larger share of the margin. The same percentage off a thin margin removes much more of it, which means the volume response needed is correspondingly larger and frequently unachievable.
What is the lasting cost of discounting?
The discount becoming the expected price. A promotion repeated often enough resets what customers believe the thing costs, which means the margin is gone permanently rather than for the period of the offer.
The formula
final price = price × (1 − discount)
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How to use this calculator
- Original price ($). Enter your own figure; the page starts at $1,800.
- Discount (%). Enter your own figure; the page starts at 15%.
- Your cost ($). Used to show the margin impact.
The result updates as you type, so you can try a figure, see what it does to price after discount, and change it back. Nothing you enter is sent anywhere or saved.
A worked example
These are the figures the calculator opens with. Every number in the results column below is produced by the same calculation the page runs, so you can follow it through before putting your own figures in.
What goes in
| Input | Value |
|---|---|
| Original price | $1,800 |
| Discount | 15% |
| Your cost | $1,150 |
What comes out
| Result | Value |
|---|---|
| Price after discount main result | $1,530.00 |
| Customer saves | $270.00 |
| Your margin after the discount | 24.84% |
| Margin points given away | 11.27% |
A 15% discount drops the price to $1,530.00, but your profit falls from $650.00 to $380.00, giving up 11.27% of margin.
How sensitive the answer is
Holding everything else steady and changing only original price, this is what happens to price after discount. It is worth knowing which of your inputs the answer actually hinges on, and which barely move it.
| Original price ($) | Price after discount |
|---|---|
| $900 | $765.00 |
| $1,350 | $1,147.50 |
| $1,800 example above | $1,530.00 |
| $2,700 | $2,295.00 |
| $3,600 | $3,060.00 |
Every other input is held at the example value while this one changes, which is not how a real job behaves. Treat it as a guide to which number matters most, not as five separate quotes.
What each figure means
- Original price ($)
- A money amount, starting at $1,800.
- Discount (%)
- A percentage, between 0 and 100, starting at 15%.
- Your cost ($)
- Used to show the margin impact.
What the results tell you
| Result | What it is |
|---|---|
| Price after discount | The headline result. A money figure. |
| Customer saves | A money figure. |
| Your margin after the discount | A percentage. |
| Margin points given away | A percentage. |
Where these figures usually mislead
Business calculations assume the inputs are steady. Seasonality, a few large customers, and slow payment all break that assumption. A figure that looks healthy annually can still leave you short in a given month.
Keep going
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