A Discount You Regret Offering

The arithmetic nobody does first

A discount reduces the price and does not reduce the cost, so the whole reduction comes out of the margin.

Sell something for a hundred that cost sixty, and the margin is forty.

Take twenty per cent off and the price is eighty, the cost is still sixty, and the margin is twenty.

So a twenty per cent discount has halved the profit on every unit, and you need to sell twice as many to stand still.

The table to keep

• 30% margin, 10% off: 1.5 times the volume.
• 30% margin, 20% off: 3 times.
• 40% margin, 10% off: 1.33 times.
• 40% margin, 20% off: 2 times.
• 50% margin, 20% off: 1.67 times.
• 50% margin, 30% off: 2.5 times.

At a thirty per cent margin, a thirty per cent discount removes the entire margin and every additional sale loses money on handling and shipping. That combination is more common than it should be.

Work out your actual margin first

Which most small shops have never done per product.

The cost is not just what you paid the supplier.

Add the shipping in, the packaging, the payment processing percentage, and any per-order handling.

For a small shop that frequently takes a nominal fifty per cent margin down to something closer to thirty-five.

Doing that calculation on your three best-selling products takes twenty minutes and changes what discount you are willing to offer.

Most people discover the margin is lower than they assumed and the discount they were planning was worse than they thought.

A worked example

A shop planned twenty-five per cent off across the range for a weekend.

Their headline margin was forty-five per cent, which fell to about thirty-four once processing, packaging, and inbound shipping were included.

At thirty-four per cent, a twenty-five per cent discount leaves nine per cent, which needs nearly four times the volume to match a normal weekend.

They had never come close to four times.

They ran ten per cent off with free shipping over a threshold instead, which needed about 1.4 times the volume and achieved 1.8.

The twenty-five per cent version would have been their busiest and least profitable weekend of the year.

The volume rarely arrives

Which is the second half of the problem.

Doubling volume on a weekend is not a matter of the discount being attractive; it requires the audience to exist and to be reachable.

A small shop with a list of eight hundred people and modest traffic cannot double sales by changing a price, whatever the price is.

So the discount is deciding to make less money on the sales you were going to make anyway.

Look at what your best previous promotion actually achieved in volume terms, and use that number rather than an optimistic one.

Most shops find their realistic ceiling is somewhere around 1.5 times.

Alternatives that cost less margin

Which achieve a similar effect at a fraction of the cost.

Free shipping above a threshold, which raises the average order and costs you only the shipping on qualifying orders.

A bundle at a modest saving, which moves more units without reducing the price of anything sold individually.

A gift with purchase, which costs you the item's cost rather than a percentage of every sale.

Discounting a specific slow line rather than the range, which clears stock without touching the products selling anyway.

Each of those is worth modelling against a flat discount before committing.

Never discount the thing already selling

Which is the most expensive mistake available.

Your best seller in December will sell at full price, so every discounted unit is margin given away for nothing.

A range-wide percentage discount does exactly this, silently, on your highest-volume products.

Excluding your top three sellers from a promotion changes the arithmetic substantially and costs you almost no additional volume.

Customers do not audit which products are excluded, provided the exclusions are stated.

That single exclusion is frequently the difference between a promotion working and not.

Set the number before you start

Which turns this from a feeling into a measurement.

Write down the volume you need before the promotion begins, based on your real margin.

Then check afterwards whether you reached it, and record the answer.

Three years of those records tells you what your shop can actually achieve and ends the annual debate.

A promotion assessed on how busy it felt will be repeated regardless of whether it made money.

Check what the discount code allows

Which is the operational half and produces losses nobody planned for.

A code that stacks with free shipping, applies to already-reduced items, or has no expiry can cost considerably more than the promotion you costed.

Set the end date, the exclusions, the minimum order, and a usage limit when you create it, rather than assuming the defaults match your intention.

Codes also circulate: one posted to a deal site is used by people who were never your customers and would never have paid full price, which is volume that produces no additional profit.

Test the code yourself against an excluded product and against a second code before the promotion goes live, since finding out on the Saturday is expensive.

The counter-case

Some discounts are not about margin.

Clearing stock that will otherwise be worthless in January is worth a loss, since the alternative is a total one.

Acquiring a customer who returns three times has a value beyond the first order, provided they actually return, which is worth checking rather than assuming.

And a business whose direct competitors all discount heavily may lose more by abstaining entirely than by participating modestly.

Even there, the arithmetic decides how modestly rather than whether.

Calculate your true margin, work out the volume required, exclude your best sellers, and consider free shipping or a bundle instead.

What to do

1. Calculate the real margin.
2. Include processing and packaging.
3. Work out the volume needed.
4. Compare it to your best ever.
5. Exclude the best sellers.
6. Model free shipping instead.
7. Record the result.

Step four is the reality check that stops most bad promotions, since a discount requiring three times the volume is not worth running in a shop that has never exceeded 1.5.

The behavioural cost is covered in the discount that trained your customers to wait.

Frequently asked questions

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