LESSON 6 OF 13
How a 10% price increase changes your break-even revenue
Why a small move in price produces a disproportionate move in profit.
There are five levers that move net profit meaningfully, and product pricing is at the top of the list — particularly if you have a high variable margin. It is not ad creative or conversion rate optimisation. Those matter, but pricing should be one of the first things you look at.
The reason is that price moves your variable margin — the percentage of every dollar you spend in order to earn that dollar. A small move down in variable margin creates a disproportionately large move in your capacity to earn contribution profit, and therefore net profit.
The worked example
Take a business with $200,000 per month in fixed expenses, operating at a 90% variable margin including advertising. Ninety cents of every dollar earned goes to sales-related expenses, so only ten cents reaches contribution profit.
| Before | After +10% | |
|---|---|---|
| Variable margin | 90% | 82% |
| Contribution margin | 10% | 18% |
| Revenue needed to break even | $2 million | $1.38 million |
| Net profit at $2 million revenue | $0 | $250,000 |
Contribution margin going from 10% to 18% is an 80% increase in how much of every dollar earned flows through to contribution profit. The same company now breaks even at $1.38 million instead of $2 million — or, if it holds revenue at $2 million, generates $250,000 in net profit instead of zero.
The objection, and what actually happened
The reaction to this is usually visceral: raising prices will hurt conversion rate, customers will be angry, you will sell far less. Maybe. Maybe not.
BottleKeeper started at a $20 price point, which felt expensive at the time. Over two years the product gained a 10-cent tether, a lid that doubled as a bottle opener, and powder coating — all inexpensive additions. Across those two years the product was tested up to a $40 price point. Conversion rate did not tank. Customers did not get angry.
Why that worked
BottleKeeper had a 15% returning customer rate, which means 85% of buyers had never seen the old price. Unless your customers return at a very high rate — a subscription business is a different world — most of your market is meeting your price for the first time.
How to test it
The only real way to know what your market will accept is to test it. Test prices up incrementally — 5%, 10%, 20% — and watch conversion rate. Do not double overnight; BottleKeeper's move took two years.
If conversion rate holds, excellent. But even if it drops, that can still be the right outcome. Take a product from $20 to $25: there is no marginal cost on the extra $5, so it is pure contribution profit. In that case a 25% fall in conversion rate is probably still net positive for the business.
You end up selling less product, but more efficiently, generating more contribution profit. You have more inventory left and you worked less. That is a good outcome even though performance came down. The key is knowing where the guardrail sits before you start.