Most Shopify founders obsess over revenue. But revenue is a lagging indicator - by the time it drops, you've already lost.

Here are the 3 leading metrics I look at when evaluating whether a store is built to scale:

1. Returning Customer Rate

If less than 20% of your customers come back, you're on a treadmill. Every dollar you spend on ads is basically rented revenue. The stores that break £50K/mo consistently have 25-35% return rates. Fix this before you scale ad spend.

2. Revenue Per Session

Not conversion rate - revenue per session. A store converting at 3% with a £25 AOV is worse than one converting at 1.5% with a £80 AOV. This single metric tells you if your traffic is actually monetised properly.

3. Add-to-Cart to Purchase Ratio

If people are adding to cart but not buying, your checkout is leaking money. Anything below 50% ATC-to-purchase means there's friction you haven't found yet - shipping surprise, trust issues, or a broken mobile experience.

Most founders I talk to don't even track these. They're flying blind, pumping money into ads, wondering why growth stalls.

Inside 10% Club, we break down exactly how to fix each of these for your specific store. If you're doing £1K-£100K/mo and want to join the 10% that actually make it - the link's on the page.