What is a conversion lift worth, and what does a price cut need?
Pick the lever you came to test. For conversion, it puts a dollar figure on the gap between your rate and a healthy Shopify benchmark, per month and per year, on traffic you already paid to acquire. For price, it finds your tipping point: the conversion lift a price move must deliver to break even on gross profit, adjusted for whether customers buy once or come back. Both reads come from the same numbers, and a funnel check shows whether price is the problem at all.
A conversion gap is worth your monthly sessions times the distance to a healthy benchmark times your AOV: orders you are not writing on traffic you already paid for. A price cut pays only if the extra orders replace the margin it gives away, so conversion has to rise by your margin divided by whatever is left of it after the cut. Below that tipping point you are busier and poorer.
- Leak formula: monthly leak = sessions x (benchmark rate - your rate) x AOV, and the annual figure is that x 12. Benchmarks: 2.5% good, 3.2% strong, 3.7% best in class, against a Shopify median around 1.4% to 1.8%.
- Common mistake: reading the annual leak as recoverable revenue. It is a ceiling, and closing half of it is a good year of conversion work.
- Tipping-point formula: break-even conversion multiplier = margin / (margin + price move), where a cut is a negative move. The lift required is that multiplier minus 1.
- First-order-only offers spread the cost, so substitute (lifetime orders x margin) for margin. A customer who buys twice can absorb roughly twice the intro discount.
- Price increases run the same math in reverse: the multiplier falls below 1, and the shortfall is the conversion you can afford to lose and still break even.
- Feasibility limit: if the cut is as deep as the margin pool it is spread over, no multiplier exists. No lift pays for it, because nothing is left per order.
- Referee metric: gross profit per session = conversion rate x AOV x gross margin. Every pricing and CRO test should raise it.
- Healthy band: a break-even lift under 15% is realistic, 15% to 40% is a stretch worth testing properly, over 40% almost never lands.
How the leak and the tipping point are calculated
Your profit per session is conversion rate times AOV times gross margin. A price cut changes two of those at once: AOV falls, and the margin percentage falls faster, because your cost of goods does not move. The break-even lift is your current gross margin divided by the margin left after the cut. If the discount lands on the first order only and customers come back, the lift is divided across lifetime orders, which is why subscription brands can afford conversion plays a one-and-done brand cannot. The tool also reads your add-to-cart rate against your conversion rate to tell you whether shoppers are rejecting the price or abandoning the checkout, which are opposite problems with opposite fixes.
The conversion read runs the other way. Monthly leak is your sessions, times the gap between your conversion rate and a benchmark (2.5% good, 3.2% strong, 3.7% best in class), times your AOV. Twelve months of that is the annual figure, and your gross margin shows how much of it is profit. The traffic and the product stay the same; the leak counts only the visitors who should be converting and are not. The model is linear, so read it as the size of the prize, not a forecast, and if you are already at or above benchmark the play moves to AOV and retention. Closing a gap raises revenue on traffic you already paid to acquire, with no extra ad spend, which is why it usually beats buying more traffic. When a store sits below benchmark, the usual causes, in this order, are traffic quality (broad prospecting traffic converts at a fraction of brand search), site speed (a one-second delay can cut conversion by roughly half), product-page clarity and offer strength. Below a few thousand sessions a month, a handful of orders swings the rate by whole points, so treat the number as directional and re-run it monthly.
Conversion benchmarks vary hard by vertical, so judge yourself against your category, not the global average. The same per-order economics set your acquisition ceiling, so run the CAC ceiling calculator next, and the DTC margin calculator shows what the margin you protect here turns into at the EBITDA line. Your inputs carry from tool to tool across the full set of free DTC calculators.