10 Proven Ways to Lower Your Customer Acquisition Cost on Shopify

Every dollar you spend to get a new customer counts. If you're running a Shopify store, you've probably asked yourself: "Why does it cost so much to make a sale?" That number — how much you spend to bring in one customer — is called your Customer Acquisition Cost (CAC). The lower it is, the more money stays in your pocket.

The good news? You don't need a huge budget or a marketing degree to bring that number down. You just need the right moves. Here are 10 tips that actually work.

Tip #1: Know Your Numbers First

Before you can fix anything, you need to know where you stand.

Your CAC = Total marketing spend ÷ Number of new customers

For example, if you spent $500 last month and got 25 new customers, your CAC is $20.

Track this every month. Once you know your number, you'll spot what's working and what's wasting money fast.

Try our free Facebook ads ROI calculator here

Tip #2: Make Better Ads — Fast — With Stirling

Bad ads burn money. Great ads bring customers in at a fraction of the cost.

The problem? Most store owners don't have time to design a whole ad campaign. That's where Stirling comes in.

Stirling is a 60-second ad studio built for Shopify sellers. You can create scroll-stopping ad creatives in under a minute — no design skills needed. Better ads mean lower cost per click, more conversions, and a lower CAC almost overnight.

🎁 Right now, you can get 3 FREE ad creatives just by signing up at TryStirling.com. Try it and see how much faster (and cheaper) your ads can perform.

Tip #3: Retarget People Who Already Visited Your Store

Most people don't buy on their first visit. That's normal. But if you're only running ads to cold audiences, you're paying top dollar for the hardest people to convert.

Retargeting lets you show ads to people who already visited your site or added something to their cart. These people already know you. They're much cheaper to convert — which brings your CAC way down.

Set up a retargeting campaign on Meta (Facebook/Instagram) or Google and watch your cost per sale drop.

Tip #4: Focus on One or Two Channels First

It's tempting to be everywhere — TikTok, Instagram, Google, Pinterest, email, SMS. But spreading yourself thin usually means doing everything poorly.

Pick one or two channels where your customers actually spend time. Go deep on those. Once you're profitable there, then expand. This keeps your ad spend focused and efficient.

Tip #5: Turn Customers Into Your Best Marketers

Referral programs are one of the most underused tools in Shopify. When a happy customer tells a friend about your store, that new customer costs you almost nothing.

Apps like ReferralCandy or Smile.io make it easy to set up a "give $10, get $10" style program. You pay only when a sale happens — which makes your CAC very predictable and low.

Tip #6: Build an Email List and Use It

Paid ads disappear the moment you stop paying. Email is yours forever.

Start collecting emails from day one — pop-ups, exit offers, post-purchase flows. Then send useful emails that bring people back to buy again. The more repeat purchases you get from existing customers, the less you need to spend finding new ones.

Email is one of the highest-return channels for Shopify stores, with an average return of $36 for every $1 spent.

Tip #7: Improve Your Landing Pages

You might be getting clicks, but if people land on a slow or confusing page, they leave without buying. That wasted click still cost you money.

A few quick wins:

• Make sure your page loads in under 3 seconds

• Show clear product photos and a strong "Add to Cart" button

• Add social proof — reviews, star ratings, and real photos from customers

A better landing page means more sales from the same ad spend. That directly lowers your CAC.

Try our free product page landing page auditor here

Tip #8: Use User-Generated Content (UGC) in Your Ads

Ads that look like real people talking about your product almost always outperform polished studio ads. They feel honest. They build trust fast.

Ask your customers to send photos or short videos of them using your product. Offer a small discount or gift card in return. Then use that content in your ads.

Pair UGC with Stirling to create high-quality ad creatives quickly — and you've got a winning combo. Don't forget, you can grab 3 free ad creatives at TryStirling.com to get started.

Tip #9: Test Small, Then Scale What Works

Never put your full budget behind an untested ad. Instead, run small tests with $5–$20 per day. Try different images, headlines, and offers. After a week, look at the data.

Which ad had the lowest cost per purchase? Put more money behind that one. Kill the rest.

This process — test, measure, scale — is how smart Shopify owners keep their CAC low month after month.

Tip #10: Increase Your Average Order Value (AOV)

Here's a trick that most people miss: if each customer spends more per order, your CAC effectively goes down — even if you don't change a single ad.

Try these tactics to boost AOV:

• Bundle products — "Buy 2, save 15%"

• Upsell at checkout — "Customers also bought..."

• Free shipping thresholds — "Spend $50 for free shipping"

When customers spend more, your revenue per acquisition goes up and your CAC becomes much easier to manage.

Final Thoughts

Lowering your customer acquisition cost isn't about one magic trick. It's about making small, smart improvements across your ads, your website, and your customer experience.

Start with what you can control today. Create better ads faster with Stirling — claim your 3 free ad creatives at TryStirling.com and see the difference quality creatives make. Then layer in the other tips over time.

Lower CAC means higher profit. And higher profit means a Shopify store that actually works for you.

Found this helpful? Bookmark it and come back whenever you're ready to tackle the next tip.