Blended CAC Calculator
Calculate your true blended CAC across every channel combined, then check first-order profitability, CAC payback, and LTV:CAC — the reality each ad platform's reported CAC hides.
Enter your numbers
Acquisition totals
Add up Meta, Google, TikTok, agency fees, and any other acquisition cost. Use net-new customers, not total orders.
Optional — unlock profitability, payback, and LTV:CAC
AOV and margin unlock first-order profit and payback. Add orders per customer per year for a simple LTV:CAC ratio.
Your result
Blended CAC
$71.43
Total acquisition spend ÷ new customers acquired
First-order profit (after CAC)
$27.57
CAC payback (orders)
0.7 orders
LTV:CAC
3.33:1
Contribution per order
$99.00
You recover blended CAC on the very first order, with $27.57 of contribution left over. That's the strongest position — you can scale acquisition without waiting on repeat orders.
Quick check
If blended CAC rises 10% (channel CAC often hides this), payback moves from 0.7 to 0.8 orders per customer.
Why channel CAC looks better than this
Meta, Google, and TikTok each count a customer as theirs whenever their ad was in the path. Sum those per-channel customer counts and you get more "acquisitions" than your store actually gained — so each channel's reported CAC comes out lower than the blended CAC above, which divides real spend by real net-new customers.
Want blended CAC tracked against payback automatically?
Daymark connects Shopify and every ad platform to keep blended CAC, first-order profit, and LTV:CAC current — one truth, not each platform's version.
See how Daymark tracks this live →What Is Blended CAC?
Blended customer acquisition cost (CAC) is your total acquisition spend across every channel divided by all the new customers you actually gained.
Blended CAC = Total Acquisition Spend / New Customers Acquired
It's called "blended" because it mixes every channel — Meta, Google, TikTok, agency retainers, affiliate payouts — into one number and divides by real net-new customers from your store. Unlike channel-reported CAC, it can't be gamed by attribution, because there's a single spend total and a single customer count. For the full definition and how it relates to plain customer acquisition cost, see the blended CAC glossary page.
How This Blended CAC Calculator Works
Enter total acquisition spend and the number of new customers and you get blended CAC immediately.
Add average order value and contribution margin % and the calculator shows whether that CAC is actually profitable:
- Contribution per order = AOV × contribution margin %
- First-order profit = contribution per order − blended CAC
- CAC payback (orders) = blended CAC ÷ contribution per order
Add average orders per customer per year and you get a simple LTV:CAC ratio, where LTV = contribution per order × orders per year.
The verdict is grounded in the math, not arbitrary bands: if the first order covers CAC you're "first order profitable"; if payback lands within two orders you're "pays back fast"; if contribution per order can't cover variable costs you're "underwater."
Blended CAC vs Channel-Reported CAC
Here's the trap. Meta says it acquired a customer for $22. Google says it acquired the same customer for $19. Both are counting the customer as theirs. Add up every platform's claimed acquisitions and you'll get more "new customers" than your store actually gained — so every channel's reported CAC comes out lower than reality.
| Blended CAC | Channel-reported CAC | |
|---|---|---|
| Customer count | Real net-new customers from your store | Each platform's self-attributed conversions |
| Double-counting | None | Platforms claim the same customer |
| Typical bias | The true number | Always looks cheaper than reality |
| Best for | Budgeting and profitability | Relative optimization inside a channel |
If your blended CAC is $71 but Meta and Google each report CAC in the $40s, the platforms aren't lying — they're each taking credit for shared customers. Blended CAC is the one you budget against.
Worked Example
A brand spends $30,000 across all channels in a month and gains 420 net-new customers.
| Input | Value |
|---|---|
| Total acquisition spend | $30,000 |
| New customers | 420 |
| Blended CAC | $71.43 |
| Average order value | $180 |
| Contribution margin | 55% |
| Contribution per order | $99 |
| First-order profit | +$27.57 |
| Orders per customer / year | 2.4 |
| LTV (simple) | $237.60 |
| LTV:CAC | 3.33:1 |
The first order alone covers the $71.43 blended CAC and leaves $27.57 — so acquisition is profitable before any repeat purchase, and the 3.33:1 LTV:CAC gives room to scale. Note the channel view would have looked even rosier and hidden how thin the first-order margin actually is if AOV or contribution slipped.
When Blended CAC Misleads
- It averages good and bad channels together. A cheap, near-saturated channel can mask an expensive one. Blended CAC tells you the aggregate is fine while a specific channel is bleaking money.
- New-customer counting is the hard part. If you count total orders instead of net-new customers, CAC looks far too low. Use first-time buyers only.
- Organic and word-of-mouth customers. If you divide paid spend by all new customers including organic ones, blended CAC looks artificially cheap. Decide whether "acquisition spend" and "new customers" are both paid-only, and keep it consistent.
- Payback assumes a repeat rate you might not have. A 2.4-orders-per-year LTV only holds if customers actually reorder. Check your real cohort repeat rate before trusting LTV:CAC.
Use blended CAC to budget and to sanity-check what the platforms report. Use channel-level CAC to decide where to shift spend.
Frequently asked questions
What is blended CAC?
Blended CAC is total acquisition spend across every channel divided by all new customers acquired. It mixes Meta, Google, TikTok, agency fees, and any other acquisition cost into one number and divides by real net-new customers from your store, so it can't be inflated by attribution the way channel-reported CAC can.
How do you calculate blended CAC?
Blended CAC = Total Acquisition Spend ÷ New Customers Acquired. Add up all acquisition spend for a period and divide by the number of first-time buyers your store gained in that same period. If you spent $30,000 and gained 420 new customers, your blended CAC is $71.43.
What is the difference between blended CAC and channel CAC?
Channel CAC uses each platform's self-attributed conversions, so Meta and Google can both claim the same customer and each report a lower CAC than reality. Blended CAC divides total spend by real net-new customers, so it counts each customer once. Blended CAC is almost always higher than any single channel's reported CAC — and it's the true one.
Why does channel-reported CAC look better than blended CAC?
Because platforms double-count customers. Each ad network claims a customer whenever its ad was in the path, so summing per-channel acquisitions gives you more 'new customers' than your store actually gained. Dividing spend by that inflated count makes each channel's CAC look cheaper than the blended reality.
What is a good blended CAC?
A good blended CAC is one your unit economics can cover. The cleanest test is first-order profitability: if contribution per order (AOV × contribution margin) exceeds blended CAC, you recover acquisition cost on the first purchase. If not, you're relying on repeat orders, so check your payback period and real repeat rate before scaling.
What is CAC payback in orders?
CAC payback in orders is blended CAC divided by contribution per order — how many orders a customer must place before their margin covers what you paid to acquire them. A payback of one order or less means the first purchase pays you back; two or more means profitability depends on customers actually reordering.
How do I calculate LTV:CAC from blended CAC?
A simple version: LTV = contribution per order × average orders per customer per year, then LTV:CAC = LTV ÷ blended CAC. If contribution per order is $99 and customers order 2.4 times a year, LTV is about $238; against a $71 blended CAC that's a 3.33:1 ratio. It only holds if your real cohort repeat rate matches the orders-per-year assumption.
Should I count total orders or new customers for CAC?
New customers only. CAC measures the cost to acquire a first-time buyer, so dividing spend by total orders (which includes repeat purchases) makes CAC look far too low. Use net-new, first-time buyers from your store for the denominator.
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Track blended CAC and payback with live store and ad data
Daymark connects Shopify and every ad platform so blended CAC, first-order profit, and LTV:CAC stay grounded in real net-new customers — not each platform's version of the truth.