Optimizing Amazon PPC: Understanding ACoS vs TACoS and the Right Time to Raise Bids

August 03, 2026 · Seller AI

When it comes to Amazon PPC, sellers often grapple with two critical metrics: ACoS (Advertising Cost of Sale) and TACoS (Total Advertising Cost of Sale). Understanding these and knowing when to raise bids can significantly impact your bottom line.

What are ACoS and TACoS?

ACoS (Advertising Cost of Sale) is the percentage of sales that your advertising spend represents. It's calculated as (ad spend / sales from ads) * 100. This metric is crucial as it tells you how much you're spending to generate a sale from your ads.

TACoS (Total Advertising Cost of Sale), on the other hand, includes all sales, not just those directly attributed to ads. It's calculated as (ad spend / total sales) * 100. TACoS gives you a broader view of your advertising efficiency across all sales channels.

Why ACoS vs TACoS Matters

Knowing the difference between ACoS and TACoS is essential because it influences your bidding strategy. A lower ACoS might seem great, but if your TACoS is high, it means your ads are not contributing significantly to total sales, which can be a red flag.

When to Raise Bids

Raising bids should be considered when:

• You have a low ACoS and TACoS, indicating that your ads are efficient and profitable.
• Your product is in high demand, and increasing your bid can capture more sales.
• You're targeting competitive keywords where higher bids can secure better ad placements.

Strategic Bidding

Strategic bidding is not just about raising or lowering your bids. It's about understanding your campaign's performance and adjusting accordingly. For instance, if your ACoS is too high, you might want to lower your bids or pause underperforming keywords.

Similarly, if your TACoS is high, you might need to reevaluate your product pricing or consider other marketing strategies to improve overall sales efficiency.

Monitoring and Adjusting

Continuously monitor your ACoS and TACoS. Use these metrics to make data-driven decisions about your PPC campaigns. Adjustments might be needed seasonally, during sales peaks, or when launching new products.

Remember, the goal is not just to win clicks but to drive profitable sales.

How Seller AI's AI Agents Help

At Seller AI, our AI agents assist Amazon sellers in managing their PPC campaigns effectively. By analyzing real-time data on ACoS and TACoS, our AI agents can suggest optimal bid adjustments, helping you maintain a balance between ad spend and sales revenue. This allows you to focus on growing your business while our AI agents handle the intricacies of PPC optimization.