Are Facebook ads worth it for your Shopify store? Do the math first

The math most stores skip

Add up what the ads cost in a month, including anyone you pay to run them. Set it next to the sales the ads actually brought in, taken from Shopify's Total sales by referrer report rather than Ads Manager. Then subtract what those products cost you. What is left is what the ads earned. If you have never done this, you do not yet know whether your ads are working.

One store's numbers

A direct to consumer beef brand was spending $1,200 a month on Facebook ads and paying an ad vendor $500 to run them. In its slowest 30 days before the work, March 20 to April 18, 2026, the whole store sold $5,110, and Shopify's Total sales by referrer report put $1,152 of that under Facebook, unpaid posts included. $1,700 a month in ad costs against a store selling $5,110 in 30 days is a store the ads are carrying.

When Facebook ads are not working

Owners describe the same pattern again and again: the ads drive clicks, the sessions climb, and nobody buys. That usually means the ads are reaching people who were never going to buy, or the store is losing them after the click. Ads Manager can still report purchases, because it counts orders its own way. Shopify's sales by referrer report is the tiebreaker. On that beef brand, 23 days of cold Facebook campaigns in August 2026 produced 5,379 visits from Facebook and Instagram and 3 completed checkouts.

Signs the ads are carrying the store

Sales drop when you turn the budget down. Free Google listings, search and email bring in a small share of sales. Nobody can tell you which channel actually paid last month. On the beef brand, Google and email were 24% of sales in the slowest 30 days before the work.

What changed, and what did not

The ads were not switched off. On August 26, 2026 they moved to warm audiences, people who had already visited the store or engaged with the brand. A website visit went from 45¢ to 13¢ in Facebook Ads Manager, 71% less, and in Shopify 1 in 179 Facebook and Instagram visits completed checkout, against 1 in 1,793 on the cold campaigns. What changed around them: the best products were published to Google's free listings, the email flows were rebuilt so they send, and every order was read by channel. Google and email went from 24% of sales in the slowest 30 days before the work to 59% in the best 30 days after.

So, are they worth it

They are worth it when the math says so, and only you can run it on your store. The better question is whether they are carrying more of the store than they should. When the free channels are working, the ads become a choice instead of the whole plan.

The proof, from one store

Straight from the case study, with the source and what it does not prove. See all five results.

If this sounds like your store

This is what Shopify store audit fixes. See it on one store, with the before and after, in the case study.