Is My CAC Too High?

Four inputs. One verdict against your margin and repeat profile. See whether your CAC sits inside the ceiling, at the edge, or above it.

What this tool tells you

Four numbers in, one number out. The headline answer is your CAC payback period: how many months of revenue it takes a new customer to repay what you spent acquiring them. Under your gross margin and 90-day repeat profile, payback inside 10 months is healthy. Past 12 months and the math is upside down.

The deliverable
Your CAC payback period in months. We compute it from year-1 economics: AOV multiplied by gross margin multiplied by total orders in the first 12 months, divided into your CAC. The lower the number, the less weight a single customer carries for you.
The verdict band
Healthy lands at 6 to 10 months. Marginal at 10 to 12 months, right at the edge of your ceiling. Bleeding past 12 months. Bleeding hard past 16. Underspending if payback is under 6 months and you likely have room to spend more on acquisition.
The fastest fix
If your verdict lands past Healthy, we name the single lever (CAC, gross margin, or 90-day repeat rate) that pulls payback back inside the ceiling with the smallest change. One lever, not three.
$

Blended across all paid channels. Total ad spend divided by new customers in the last 30 days.

$

Average order value across all channels. Shopify Analytics, Sales, Average order value.

%

After COGS, shipping, and payment processing. Shopify Reports, Profit margin.

%

Customers with 2+ orders divided by total customers, last 90 days. Shopify Analytics > Customers > Returning customer rate. Don't know? Use the category average (p50).

How we judge CAC

Four inputs, one verdict, one headline number. The decision lives in your year-1 max allowable CAC: AOV multiplied by gross margin multiplied by total orders in the first 12 months. We compare your actual CAC to that ceiling and place you in one of five bands. Payback period is the same math expressed in months.

Underspending

CAC is under 50 percent of your year-1 ceiling. Payback inside 6 months. You likely have room to spend more on acquisition without breaking the math.

Your CAC is well below the ceiling your margin and repeat profile can support. You have room to spend more on acquisition. The next step is figuring out where the headroom belongs, which is what the 20-Minute Health Score is for.

Healthy

CAC sits between 50 and 85 percent of your ceiling. Payback at 6 to 10 months. The math is working, with buffer for a soft week or channel decay.

Your CAC is comfortably inside the ceiling your margin and repeat profile can support. The math is working. Keep an eye on the trend; weekly is when changes show up first.

Marginal

CAC sits between 85 and 100 percent of your ceiling. Payback at 10 to 12 months. No buffer left, but not yet a year-1 loss.

Your CAC is right at the edge of what your margin and repeat profile can support. The math says you are paying for every new customer with the year of revenue they bring. There is no buffer for a soft week.

Bleeding

CAC is 100 to 130 percent of your ceiling. Payback past 12 months. Every new customer is acquired at a year-1 loss against the year of revenue they bring.

Your CAC is above the ceiling your margin and repeat profile can support. Every new customer is acquired at a loss against their year-1 contribution. The leak is real and the fix is one of three levers below.

Bleeding hard

CAC is more than 130 percent of your ceiling. Payback past 16 months. The math is severely upside down. The fix lives in the lever ranked in your result; this is the week to act on it.

Your CAC is far above the ceiling your margin and repeat profile can support. The math is severely upside down. This is the week to act on the lever ranked below, not next quarter.

Three reads Shopify Analytics does not give you

Shopify shows your CAC. It does not compute the ceiling your AOV, gross margin, and 90-day repeat rate can support, so it cannot tell you whether your CAC is healthy or upside down. We compute the three reads that drive the verdict.

Max allowable CAC
Your year-1 customer gross profit ceiling. AOV multiplied by gross margin multiplied by total orders in the first 12 months. The number your CAC must stay below for year-1 economics to work.
CAC payback period
Months of revenue to repay a new customer's CAC. Mathematical identity: payback equals 12 times your CAC ratio. Sharper read than CAC alone because it puts the answer in a time unit you can plan around.
Fastest fix lever
If your CAC sits past Healthy, we identify which single lever (CAC, gross margin, or 90-day repeat rate) returns you to your ceiling with the smallest projected change. One lever, ranked, not three.

Average CAC by Shopify vertical

Median customer acquisition cost for each of the 7 verticals we cover. Vertical median is a directional read; your ceiling against your own AOV, gross margin, and 90-day repeat rate is the verdict.

Apparel

Median CAC $35

Apparel CAC is set by AOV and dragged by category-typical return rates. Lifecycle email does the work of stretching payback past the first order.

Supplements

Median CAC $45

Supplements run the strongest 90-day repeat profile in DTC, which lifts the CAC ceiling materially. Subscription absorbs more aggressive acquisition spend than other categories.

Beauty

Median CAC $42

Beauty bridges apparel and supplements. Strong gross margins absorb expensive paid traffic; sample-and-restock cadence drives the repeat rate that funds payback.

Food & Beverage

Median CAC $32

Food and beverage runs thinner margins than most categories. Replenishment and subscription do most of the work; paid CAC has to clear a low bar to stay inside the ceiling.

Home

Median CAC $55

Home goods carry higher AOVs and slower repeat cycles. First-purchase economics dominate the CAC math because year-1 orders concentrate around the initial order.

Pet

Median CAC $38

Pet trends toward subscription and replenishment. Repeat rate runs high; CAC benchmarks cluster tight around the median because the category leans on the same lifecycle motion.

Fashion

Median CAC $38

Fashion (benchmarked separately from apparel) skews toward higher-AOV considered purchases. Margin tiers vary; seasonal demand shifts CAC quarter to quarter.

Common questions

What is a good CAC for a Shopify store?

There is no single number. A good CAC is one that sits inside the ceiling your AOV, gross margin, and 90-day repeat rate can support. At 60 percent gross margin, an 80 dollar AOV, and a 25 percent 90-day repeat rate, your year-1 max allowable CAC is about 96 dollars. A 90 dollar CAC in that profile is healthy. A 140 dollar CAC is bleeding.

What is CAC payback period and how is it calculated?

Months of revenue it takes a new customer to repay what you spent acquiring them. We compute it as 12 multiplied by the ratio of your CAC to your year-1 max allowable CAC. Under 10 months is healthy. Past 12 months and the math is upside down on year-1 economics.

What is a healthy CAC payback for an ecommerce brand?

On year-1 economics, payback inside 10 months is healthy. 10 to 12 months is marginal. Past 12 months means every new customer is acquired at a year-1 loss against the year of revenue they bring. SaaS benchmarks (12 to 18 months) are not the right comparison for DTC because most ecommerce LTV concentrates in the first year.

How do I lower my CAC if it is too high?

Three levers move the math. CAC down, by reallocating spend to your strongest channels and pausing the weakest. Gross margin up, by raising AOV, lowering COGS, or trimming free shipping. 90-day repeat rate up, by warming new customers with email and SMS flows in their first 30 days. The tool ranks which lever returns you to your ceiling with the smallest projected change.

Is my CAC too high if it is above the industry average?

Industry-average CAC is directional, not a verdict. The verdict depends on your own margin and repeat profile. A 90 dollar CAC is bleeding for a brand with a 40 dollar AOV and 30 percent margin, and healthy for a brand with a 150 dollar AOV and 60 percent margin. Vertical median sits in the result for context; the math against your ceiling is the final answer.

Why does 90-day repeat rate matter for CAC?

Repeat customers extend the revenue window that funds your CAC. A 10 percent 90-day repeat rate gives you 1.4 expected orders in year one. A 30 percent rate gives you 2.2. At the same AOV and margin, the higher-repeat brand can spend roughly 57 percent more on CAC and still hit the same payback. Repeat rate is leverage on the ceiling.

What CAC ratio is considered bleeding?

A CAC ratio (CAC divided by year-1 max allowable CAC) of 1.0 to 1.3 is bleeding. 1.3 and above is bleeding hard. Below 1.0 is at or inside your ceiling, with progressively more headroom the lower the ratio.

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