Customer Acquisition Cost (CAC) Calculator
Get your fully-loaded customer acquisition cost — ad spend plus people and tools, not just the ad bill.
Written by Dorothy Ibrahim, 10+ years in banking & finance
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How we calculate this
This calculator computes your fully-loaded customer acquisition cost — ad spend plus the allocated share of sales and marketing salaries plus tools and agency fees, divided by new customers — not just the ad bill most CAC figures use. It shows blended and paid-only CAC side by side, because blended CAC can hide an expensive paid channel, and quantifies how much an ad-only CAC understates the truth.
The formulas
- Fully-loaded blended CAC
- (ad spend + allocated sales & marketing salaries + tools & agency) ÷ new customers acquired (all channels)
- Paid-only CAC
- ad spend ÷ customers from paid channelsOrganic customers are excluded — this exposes what paid acquisition really costs.
- Ad-only CAC (the understated version)
- ad spend ÷ all new customers
- Understatement
- (fully-loaded CAC − ad-only CAC) ÷ fully-loaded CAC
Worked example
- Say a month of acquisition cost $8,000 in ads, $4,000 of allocated sales and marketing salaries, and $1,000 of tools and agency fees, and brought in 120 new customers, all attributed to paid channels.
- Fully-loaded CAC = ($8,000 + $4,000 + $1,000) ÷ 120 = $13,000 ÷ 120 = $108.33 per customer.
- Ad-only CAC = $8,000 ÷ 120 = $66.67 — which understates the true cost by about 38% ($41.67 per customer of people and tools is invisible in the ad-only figure).
- Whether $108.33 is good or bad cannot be answered here: it depends on what a customer is worth (LTV) and how fast the contribution pays the CAC back — the LTV:CAC & Payback tool renders that verdict.
Rates, benchmarks & sources
- CAC = total acquisition spend ÷ new customers; the fully-loaded variant counts people and tools, not just ads — Standard unit-economics definition
- CAC carries no good/bad threshold by itself — it is judged only against LTV and payback (see the LTV:CAC & Payback tool) — Interpretation convention
Figures current as of 2026-07-02. See our methodology & editorial standards for how constants are versioned and verified.
What this tool doesn’t model
- Salary allocation is an estimate — deciding what share of a founder’s or marketer’s time counts as "acquisition" is judgment, and small changes move CAC meaningfully.
- Attribution is imperfect: splitting customers into paid vs organic relies on your tracking, and dark-social or word-of-mouth customers often get miscredited to paid channels.
- A single-period snapshot — spend this month may convert customers next month, so fast-growing or long-sales-cycle businesses should average several periods.
- Treats all new customers as equal; if channels deliver customers of very different value, per-channel CAC against per-channel LTV is the sharper analysis.
- Excludes discounts, free trials, and onboarding costs, which are also acquisition costs in a broader sense.
Frequently asked questions
What costs should be included in CAC?
Everything you spend to acquire customers: ad spend, the allocated share of sales and marketing salaries (including your own time if you do the marketing), and the tools and agency fees that support acquisition. In the worked example the ad-only figure misses about 38% of the true cost — decisions made on the understated number, like how much you can bid for a customer, will be systematically too aggressive.
What is the difference between blended and paid CAC?
Blended CAC divides all acquisition spend by all new customers, including the organic ones that cost you nothing at the margin. Paid CAC divides ad spend by paid-channel customers only. When organic volume is healthy, blended CAC looks flattering while the paid channel quietly runs expensive — comparing the two side by side exposes that gap before you scale the paid budget.
Is my CAC good or bad?
CAC has no verdict on its own — $108 is excellent for a customer worth $900 of lifetime contribution and ruinous for one worth $150. The two comparisons that matter are the LTV:CAC ratio (lifetime contribution against acquisition cost) and CAC payback (how many months of contribution it takes to earn the CAC back). This site’s LTV and LTV:CAC & Payback tools carry those numbers forward.
How should I allocate salaries into CAC?
Estimate the share of each person’s time spent on acquiring new customers (as opposed to serving existing ones) and include that fraction of their cost. A common approach for a small team: full cost for dedicated marketers or salespeople, a percentage for hybrid roles, and an honest slice of founder time. Consistency matters more than precision — use the same allocation every period so the trend is real.
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themoneysheet provides educational estimates, not financial, tax, or legal advice. Figures use published rates and formulas current as of the date shown, but your situation may differ. Consult a qualified professional (CPA, attorney, or licensed advisor) before making financial decisions.