Mastering Amazon PPC: Understanding ACoS vs TACoS and When to Raise Bids

July 13, 2026 · Seller AI

As an Amazon seller, optimizing your PPC campaigns is crucial for maximizing profits and driving sales. This article discusses key metrics ACoS and TACoS, and guidance on when and how to raise bids.

Understanding ACoS vs TACoS

ACoS, or Advertising Cost of Sales, is a critical metric for any Amazon seller running PPC campaigns. It is calculated as the total ad spend divided by the total sales generated by the ads. TACoS, or Total Advertising Cost of Sales, on the other hand, includes not only ad spend but also the cost of goods sold in the calculation. This gives a more comprehensive view of the profitability of your ads.

Why Understanding ACoS and TACoS Matters

By understanding ACoS and TACoS, you can better assess the effectiveness of your ads and make data-driven decisions. A lower ACoS indicates a more efficient ad campaign, but it's important to consider TACoS to see the overall profitability of your ads, including the cost of goods sold.

When to Raise Bids

Raising bids on your Amazon PPC campaigns should be a strategic decision based on various factors. These include:

• Conversion Rate: If your ad has a high conversion rate but is losing out on impressions due to low bid, it's time to raise your bid.
• ACoS vs. Target ACoS: If your ACoS is significantly lower than your target, you might consider raising your bid to capture more sales without negatively impacting profitability.
• Competitor Activity: If competitors are bidding aggressively, you might need to raise your bids to stay competitive and maintain visibility.

How to Raise Bids Strategically

Raising bids should not be done in isolation. You should:

• Analyze Trends: Look at historical data to determine the best times to increase bids based on traffic and conversion patterns.
• Test Incrementally: Gradually increase bids and monitor the impact on ACoS and TACoS to avoid excessive spending.
• Adjust Campaigns: Not all campaigns may require bid increases. Analyze each campaign to determine where raising bids will have the most significant positive impact.

Raising Bids: A Balancing Act

Raising bids can increase sales, but it's essential to balance this with profitability. Continuously monitor ACoS and TACoS, and adjust your bids accordingly. The goal is to find the sweet spot where your ads are profitable and efficiently driving sales.

Seller AI's Approach to Amazon PPC Optimization

At Seller AI, our AI agents are designed to automate and optimize your Amazon PPC campaigns. By constantly monitoring ACoS and TACoS, they adjust bids in real-time to ensure your campaigns are performing at their best without manual intervention. Our AI-driven approach helps you maintain a competitive edge and optimize your ad spend for maximum ROI.