Last Updated on April 7, 2026 by Jason Andrew
Discounting is one of the easiest tactics to use when sales slow or when you need a quick revenue boost. A lower price can drive short-term interest, making discounting seem like a simple and effective strategy. However, many eCommerce founders overlook the long-term effects of discounts on profitability. In a market where customer acquisition costs are rising and competition is increasing, discounting can quietly damage the financial health of your business. Before you run another promotion, it’s important to understand the impact that discounting has on your margins and your overall performance.
In this article
- Why discounting kills your profits
- What happens when you discount
- How many extra units you need to make up a discount
- Discounting calculator
Why discounting kills your profits
Many businesses use discounting as a default approach because it appears quick and straightforward. It can create an immediate lift in orders, and it often feels like the right move when you want fast results. However, discounting reduces the revenue you earn per sale while your cost of goods, operating expenses and marketing costs stay the same. This has a direct, immediate impact on your profit.
There are several ways to improve profitability, such as raising prices, increasing volume or reducing expenses. Among these options, raising prices is the most effective because every additional dollar becomes profit. Discounting moves in the opposite direction, reducing the amount you keep on each order, which makes it harder to achieve sustainable growth.
What happens when you discount
To understand the effect of discounting, imagine a business that earns $1M in annual revenue with a 10% net profit margin. At full price, the business generates $400,000 in gross profit and $100,000 in net profit, which creates a stable financial position.
If the business introduces a 10% discount, its margin disappears completely. A 20% discount would put the business in the red, even if nothing else changes. The operations, costs and products remain the same. The only change is the price, yet this single adjustment is enough to eliminate profitability. This example highlights how sensitive margins can be and why discounting is more dangerous than it appears.
Your CAC doesn’t drop when your price does
A common assumption is that customer acquisition cost will decrease when prices go down. Unfortunately, paid advertising platforms do not work that way. Meta and Google charge based on auction competition, not the price of your product. This means your CAC typically remains the same, even if you offer significant discounts.
As a result, you earn less from each sale while paying the same amount to attract each customer. This combination can significantly reduce your profitability and make it more difficult to scale your business through paid channels.
How many extra units do you need to make up a discount
Another belief is that higher sales volume will offset lower margins. However, this rarely works in practice.
Consider a brand that sells 1,000 units a month with a 40% gross margin. If it applies a 15% discount, it must increase its sales volume by 60% just to match its previous gross profit. That means selling 1,600 units, which is an additional 600 units each month.
Many discount campaigns do not deliver this level of growth. The result is increased activity but lower total profit. This demonstrates that discounting can create the illusion of success without improving the financial performance of the business.
Discount fatigue is real
Consumers today see discounts everywhere, which changes how they behave. When customers become used to frequent promotions, they often wait for a discount before making a purchase. This reduces your full-price sales and makes it harder to increase prices later. Over time, this behaviour can weaken your brand and make it harder to maintain healthy margins.
Discount fatigue also affects how your products are perceived. When customers expect discounts, they may assume your products are worth less, even if the quality remains high. This shift in perception can take a long time to repair.
Discounting calculator
Before running any discounting campaign, it’s important to understand how much extra volume you need to sell in order to maintain your gross profit. This calculator helps you model different scenarios so you can see exactly how a discount will affect your margins.
Make sure to make a copy of the file before adding your own numbers.
Use the Discounting Calculator here.
Final thought
If you discount below your gross margin, you are not creating a promotion — you are creating a loss. Selling more units does not fix a weak margin, and the financial reality will always catch up. Understanding the impact of discounting can help you make clearer decisions and protect the long-term health of your business.
Ready to improve your margins without relying on discounts?
If you want to see how your business compares to other high-performing eCommerce brands, 👉 Book a call with SBO. We’ll review your margins, your unit economics and the best steps to increase your profitability.
