How to reduce customer acquisition cost?

Q: How to reduce customer acquisition cost?

To reduce CAC: optimize your ad campaigns (audiences, creatives), improve site conversion, develop organic channels (SEO, content), leverage word of mouth and referral programs. A 20% CAC reduction can double your net margin.

Detailed explanation

Reducing customer acquisition cost is one of the most powerful levers to improve e-commerce profitability. Unlike increasing AOV or purchase frequency, a CAC reduction has an immediate impact on net margin. A 20% CAC reduction can literally double your net profit without changing sales volume. Several complementary levers achieve this.

The first lever is ad campaign optimization. Continuously test your creatives (images, videos, copy), refine your audiences using first-party data, and leverage automatic optimization features of the platforms. Sending conversion events server-side (Meta CAPI, Google Enhanced Conversions) significantly improves algorithm performance, especially since iOS 14.5.

The second lever is improving site conversion rate. Every 10% improvement in conversion is equivalent to a 10% CAC reduction. Optimize site speed, simplify the checkout funnel, add social proof (reviews, testimonials), test different prices and offers, and personalize the experience based on traffic source. A/B testing tools are essential to validate these optimizations.

The third lever is developing free or low-cost channels: SEO, brand content, email marketing, organic social. These channels take more time but generate customers at very low or near-zero CAC in the long term. Finally, set up referral programs and encourage word of mouth: a referred customer has near-zero CAC and typically higher-than-average LTV.

Concrete example

A store has a CAC of 60 EUR, LTV of 180 EUR and 50,000 EUR annual net profit. By optimizing creatives and conversion rate, CAC drops to 48 EUR (-20%). On 1,000 customers/month, this represents 12,000 EUR less spent monthly or 144,000 EUR annually. Net profit jumps from 50,000 EUR to 194,000 EUR, nearly 4x more, without increasing sales volume.