How do you calculate customer acquisition cost by channel?

To calculate CAC by channel, divide the total marketing spend for each channel by the number of customers acquired through that channel. For example, if you spent $10,000 on Google Ads and acquired 50 customers, your Google Ads CAC is $200. Include all associated costs: ad spend, agency fees, tools, and allocated team time.

What is a good CAC by marketing channel?

Good CAC varies significantly by channel and industry. In 2025, average CACs are: Organic Search ($200-400), Paid Search ($300-500), Social Media Ads ($150-350), Email Marketing ($50-150), and Content Marketing ($100-300). SaaS companies typically see higher CACs ($300-700) while ecommerce averages lower ($50-200).

Which marketing channel has the lowest customer acquisition cost?

Email marketing and organic search typically have the lowest CAC because they leverage owned audiences and compounding content assets. However, they require longer time horizons. For immediate results, referral programs often deliver the best CAC, averaging 30-50% lower than paid channels.

How do I reduce my CAC across channels?

Reduce CAC by: 1) Improving conversion rates through better landing pages, 2) Reallocating budget from high-CAC to low-CAC channels, 3) Investing in organic channels for long-term efficiency, 4) Implementing retargeting to convert warm audiences, and 5) Optimizing ad creative and targeting based on performance data.

Should I include all costs when calculating channel CAC?

Yes, for accurate CAC calculation include: direct ad spend, agency/contractor fees, software tools attributed to that channel, team salaries (proportionally allocated), creative production costs, and any channel-specific overhead. Excluding costs leads to underestimated CAC and poor budget decisions.

How often should I recalculate CAC by channel?

Calculate CAC monthly for active paid channels and quarterly for organic channels. Review trends over 3-6 month periods to account for seasonality and campaign learning phases. Recalculate immediately after major changes like new campaigns, market shifts, or significant budget adjustments.

CAC by Channel Calculator

Calculate your customer acquisition cost by channel. Compare CAC across paid, organic, social & more. Free tool with 2025 industry benchmarks.

Enter Your Values

Paid Search Spend

Total Google/Bing Ads spend including management fees

Paid Search Customers

New customers attributed to paid search

Paid Social Spend

Facebook, Instagram, LinkedIn, TikTok ad spend

Paid Social Customers

New customers attributed to social ads

Organic/SEO Investment

Content creation, SEO tools, agency fees

Organic Search Customers

New customers from organic search traffic

Email Marketing Spend

Email tools, list building, content creation costs

Email Marketing Customers

New customers attributed to email campaigns

Formula

Channel CAC = Channel Spend / Channel Customers | Blended CAC = Total Spend / Total Customers

Each channel's CAC is calculated independently by dividing spend by customers acquired. The blended CAC shows your overall acquisition efficiency across all channels.

Blended CAC$150

Email is most efficient at $50 CAC. Paid Search costs $250 per customer.

Paid Search CAC$250

Paid Social CAC$200

Organic CAC$80

Email CAC$50

Total Marketing Spend$10,500

Total Customers Acquired70

Most Efficient ChannelEmail (+31% vs benchmark)

Least Efficient ChannelPaid Search (+27% vs benchmark)

Potential Savings (at best CAC)$7,000

CAC Benchmarks by Channel (2025)

Email Marketing$72 avg — lowest CAC channel

$0 – $100

Referral Program$98 avg — high-quality customers

$50 – $150

Content Marketing$156 avg — compounds over time

$100 – $200

Paid Social$189 avg — scalable reach

$150 – $250

Paid Search$341 avg (B2B SaaS)

$250 – $400

Source: FirstPageSage & Industry Reports 2025

How to Calculate CAC by Channel

Enter your marketing spend for each channel
Enter the number of customers acquired from each channel
View your CAC breakdown by channel
Compare against 2025 industry benchmarks
Identify your most and least efficient channels
Get AI recommendations for budget reallocation

CAC Benchmarks by Channel (2025)

$341

Paid Search CAC (B2B SaaS)

$87

Paid Search CAC (Ecommerce)

$205

Organic Search CAC (B2B SaaS)

$189

Social Media Ads CAC (Average)

$72

Email Marketing CAC

$156

Content Marketing CAC

$98

Referral Program CAC

$427

LinkedIn Ads CAC (B2B)

$142

Facebook Ads CAC (B2C)

$278

Google Display CAC

Source: FirstPageSage & Industry Reports 2025

CAC by Channel Calculator

CAC Benchmarks by Channel (2025)

How to Calculate CAC by Channel

CAC Benchmarks by Channel (2025)

Frequently Asked Questions

How do you calculate customer acquisition cost by channel?

What is a good CAC by marketing channel?

Which marketing channel has the lowest customer acquisition cost?

How do I reduce my CAC across channels?

Should I include all costs when calculating channel CAC?

How often should I recalculate CAC by channel?