Customer Acquisition Cost Calculator

What customer acquisition cost measures

Customer acquisition cost (CAC) is the average cost of gaining one new paying customer over a chosen reporting period. It is calculated by dividing total acquisition-related spend by the number of new customers acquired in that same period. Businesses use CAC calculations (also described as a CAC calculator, blended CAC, marketing CAC, sales CAC, or CAC by channel) to understand how efficiently marketing and sales spending converts into customers, and to compare that efficiency across channels, campaigns, or time periods.

What costs should be included in CAC

A blended CAC calculation typically includes every cost involved in acquiring customers over the period: marketing costs such as paid media, marketing salaries, agency fees, content production, marketing software, and events; and sales costs such as sales salaries, commissions, sales software, and travel. What counts as an acquisition cost varies by business — some organizations include a share of general overhead, others do not. This calculator does not decide that for you: it totals exactly the cost fields you fill in, and leaves any field you skip at zero rather than estimating it.

Quick estimate versus advanced cost build-up

Quick estimate divides a single total acquisition-cost figure by new customers acquired, which is fast when you already have a total in mind. Advanced cost build-up instead sums individual marketing and sales cost lines, which shows how much of CAC comes from marketing versus sales and which single line item is the largest driver. Within Advanced mode, an optional channel-analysis section lets you compare CAC across individual acquisition channels, separately from the main cost build-up.

Customer acquisition cost formula

Quick mode

Blended CAC = total customer-acquisition cost ÷ new customers acquired.

Advanced mode

Total marketing cost = sum of all marketing-cost inputs.
Total sales cost = sum of all sales-cost inputs.
Total acquisition cost = total marketing cost + total sales cost.
Blended CAC = total acquisition cost ÷ new customers acquired.
Marketing cost per acquired customer = total marketing cost ÷ new customers acquired.
Sales cost per acquired customer = total sales cost ÷ new customers acquired.

Channel analysis (optional, separate from the build-up above)

Channel CAC = channel spend ÷ customers acquired through that channel.
Weighted channel CAC = total channel spend across all rows ÷ total customers acquired across all rows.

Channel spend is never added into total acquisition cost automatically, because channel spend may overlap with the marketing-cost fields above; adding both would double-count the same spend.

Worked example

Quick estimate (example scenario, illustrative only, not a benchmark): a total customer-acquisition cost of $120,000 and 600 new customers acquired in the period.

Blended CAC = $120,000 ÷ 600 = $200.

Advanced cost build-up (example scenario, illustrative only): 600 new customers acquired, with marketing costs of $40,000 paid media, $30,000 marketing salaries, $8,000 agency fees, $5,000 content production, $3,000 marketing software, $4,000 events and sponsorships, and $2,000 other marketing; and sales costs of $35,000 sales salaries, $15,000 sales commissions, $2,000 sales software, $3,000 travel and sales-event costs, and $1,000 other sales costs.

Total marketing cost = $40,000 + $30,000 + $8,000 + $5,000 + $3,000 + $4,000 + $2,000 = $92,000. Total sales cost = $35,000 + $15,000 + $2,000 + $3,000 + $1,000 = $56,000. Total acquisition cost = $92,000 + $56,000 = $148,000. Blended CAC = $148,000 ÷ 600 = $246.67. Marketing cost per customer = $92,000 ÷ 600 = $153.33. Sales cost per customer = $56,000 ÷ 600 = $93.33. Marketing share of total cost is 62.2%, sales share is 37.8%. The largest single cost driver in this example is paid media and advertising ($40,000).

Optional channel analysis (same example, illustrative only): Paid Search $30,000 spend / 150 customers (CAC $200), Organic/Content $10,000 spend / 100 customers (CAC $100), and Paid Social $20,000 spend / 80 customers (CAC $250). Total channel spend = $60,000, total channel customers = 330, weighted channel CAC = $60,000 ÷ 330 = $181.82. Organic/Content has the lowest CAC and Paid Social has the highest. This channel spend ($60,000) is illustrative and separate from the $148,000 total acquisition cost above; the two are not added together.

Use the “Load example” button above to load the matching values for whichever mode is active.

How to interpret CAC

Blended CAC tells you the average cost to acquire one customer over the period you entered; it does not by itself tell you whether that cost is good or bad. A low CAC is not automatically good, and a high CAC is not automatically bad, without also considering customer lifetime value, gross margin, retention, and how quickly the acquisition cost is paid back. This calculator does not calculate customer lifetime value (LTV) or CAC payback period itself. For value comparison, use the Customer Lifetime Value Calculator and the LTV:CAC Ratio Calculator; this site does not currently have a dedicated CAC payback-period calculator. In Advanced mode, comparing marketing share against sales share, and reviewing the largest cost driver, can help you see where acquisition spend is concentrated.

CAC by acquisition channel

CAC can differ substantially by channel, customer segment, geography, and business model, so a single blended figure can hide large differences underneath it. The optional channel-analysis section lets you enter spend and customers acquired for individual channels to see channel CAC side by side, along with a weighted channel CAC across all the rows you enter. Because channel spend can overlap with the marketing-cost fields in the main build-up, channel totals are kept separate and are never added into the main blended-CAC calculation automatically.

Common CAC calculation mistakes

• Mixing reporting periods, for example dividing an annual cost by a single month of new customers.
• Comparing blended CAC across businesses or channels with very different customer segments, deal sizes, or sales cycles.
• Treating a low CAC as automatically good without checking customer lifetime value, gross margin, or retention.
• Double-counting costs by adding channel-level spend on top of a marketing total that already includes it.
• Excluding sales costs and only counting marketing spend, which understates the true cost of acquisition.

Limitations

• All costs and customer counts must use the same reporting period; this calculator does not convert or align mismatched periods for you.
• It does not calculate customer lifetime value (LTV) or CAC payback period.
• It does not state a universal target CAC or an ideal LTV:CAC ratio; there is no single correct value for every business.
• Channel analysis figures are only as accurate as the spend and customer counts you attribute to each channel, which this calculator cannot verify.
• This is a planning estimate, not accounting, tax, legal, financial, or investment advice.

Comparing CAC against customer lifetime value

CAC alone doesn't say whether acquisition spend is paying off — that requires comparing it against customer lifetime value. See the Customer Lifetime Value Calculator, the LTV:CAC Ratio Calculator, and the LTV:CAC Ratio Explained guide for a full worked example.