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How Much Are You Really Paying Per Customer?

By ยท Updated

Most store owners don't know their true customer acquisition cost. This calculator shows you. And what organic traffic could save you.

Your Monthly Ad Spend
$
Total across all platforms. Meta, Google, TikTok, etc.
Monthly Customers From Ads
How many orders come directly from ads each month?
Average Order Value
$
Monthly Organic Visitors (if any)
Check Google Analytics โ†’ Acquisition โ†’ Organic Search. Put 0 if you don't know.
$0
Your cost to acquire one customer
$0
Monthly ad spend
$0
Annual ad spend
$0
Monthly ad revenue
0x
Ad ROAS
What If You Had Organic Traffic?
Current ad cost per customer$0
With 200 organic visitors/month$0
With 500 organic visitors/month$0
With 1,000 organic visitors/month$0
Monthly savings at 500 visitors$0

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What this tool does

The ad spend calculator works out what you really pay to win a customer through ads. You enter monthly ad spend across platforms, the number of customers those ads bring, and your average order value. It returns your cost per customer, annual ad spend, ad revenue and return on ad spend (ROAS). It then shows what that cost would look like with 200, 500 or 1,000 organic visitors a month.

The organic scenarios assume a 2.5 percent conversion rate, which is a built-in figure.

Why it is worth using

Most owners know their spend and not their cost per customer. The figure is simple to calculate and changes decisions: a cost per customer near half your order value is a signal to check repeat purchase before you scale ads.

How to use it

  1. Add up one month of ad spend. Include every platform and any agency fee.
  2. Count customers from ads. Use orders you can attribute to ads, and be honest about the uncertainty.
  3. Enter average order value. Use the real figure.
  4. Read cost per customer and ROAS. ROAS is ad revenue divided by ad spend.
  5. Look at the organic scenarios. Treat them as an illustration of scale, not a promise.

Who it is for

What it cannot tell you

Cost per customer ignores repeat purchases and margin, so a high figure is not always bad. Attribution from ad platforms is imperfect, and the organic scenarios assume one fixed conversion rate. Use the output as one input, not a verdict.

Common questions

How do I calculate customer acquisition cost?

Divide the money spent on acquiring customers by the number of new customers in the same period. The calculator does this for ads.

What is a good ROAS?

It depends on your margins and repeat purchase rate. The calculator highlights a ROAS of 3 or more as healthy and under 1.5 as weak, but your own break-even point matters more.

Does the organic estimate use my data?

It uses the visitor counts you see on screen and an assumed 2.5 percent conversion rate. It is an illustration, not a forecast.

Why does my cost per customer look high?

Common causes are broad targeting, a weak landing page or attributing too few orders to ads. Check each before cutting spend.

Keep reading

About the author

is the founder of RunOctopus. He built All Angles Creatures, a reptile-feeder store in a hard, entrenched niche, using exactly this method. It became the most-cited site in the AI answers we measured, with 5,447 Google clicks in 28 days. It is RunOctopus's proof store for programmatic SEO and AI search citation.