Ep 1 - The Number Metric for Success with Amazon Ads (MP3 - Audio Only)

Total Advertising Cost of Sales (TACOS)—calculated as total ad spend divided by total revenue—serves as the primary indicator of marketing efficiency for Amazon sellers. Unlike ACOS or ROAS, which isolate advertising performance, TACOS captures the holistic impact of ad spend on total account growth, including organic sales. High-performing advertising strategies prioritize increasing total revenue while maintaining or decreasing TACOS, effectively building a competitive moat. Over-reliance on narrow ad-specific metrics often leads to cannibalization, where paid ads replace organic sales without driving net growth. Because TACOS is a product-level metric, granular analysis is essential for optimizing profitability. Benchmarks vary significantly based on brand maturity and category competitiveness, with established brands typically targeting under 10% while newer entrants may operate between 15% and 30% to secure market share.