How to Lower Amazon ACoS and Improve TACoS

If you're running Amazon PPC campaigns, you already know that tracking your advertising spend is the difference between a profitable business and an unprofitable one. However, the metrics you use to measure success have evolved significantly. In 2026, simply looking at your ACoS is no longer enough to understand whether your advertising investment is truly working.

According to Amazon Advertising, sellers who actively optimize their campaigns see an average 25% improvement in ROAS within the first 90 days. The key is knowing which metrics to optimize and how. Let's break it down.

ACoS vs TACoS: Understanding the Difference

What Is ACoS?

ACoS (Advertising Cost of Sale) measures your ad spend as a percentage of ad-attributed revenue only. If you spent $100 on ads and those ads generated $500 in sales, your ACoS is 20%. The problem with relying solely on ACoS? It only tells you about sales Amazon directly attributed to ads — it ignores your organic revenue entirely.

What Is TACoS?

TACoS (Total Advertising Cost of Sale) measures your ad spend as a percentage of your total revenue — both ad-attributed and organic. If you spent $100 on ads and your total revenue was $1,000, your TACoS is 10%. This is a far more meaningful measure of advertising efficiency because it captures the halo effect of PPC on organic ranking.

A decreasing TACoS over time is the clearest signal that your PPC investment is working — it means your organic sales are growing faster than your ad spend, which is exactly what sustainable Amazon growth looks like.

What Is a Good ACoS for Amazon?

Your break-even ACoS is calculated as: (1 - COGS/Revenue) × 100. If your product costs $10 to source and sells for $30, your break-even ACoS is 66%. Anything below that is technically profitable — but you need to account for Amazon fees, FBA costs, and overhead to find your true target ACoS.

Most healthy Amazon businesses we manage operate with an ACoS between 15–35%, depending on category, product margin, and growth stage. New product launches often run at higher ACoS deliberately to build ranking momentum — this is an intentional investment, not a failure.

Proven Strategies to Lower ACoS

1. Add Negative Keywords Aggressively

The single fastest way to reduce ACoS is to stop spending on irrelevant search terms. Download your search term report every week and add any term that has spent more than your target CPA without converting as a negative keyword. This alone can cut wasted spend by 20–30% within 30 days. Mastering keyword research for PPC is the foundation of this approach.

2. Separate Your Campaign Types

Many sellers run everything in broad match campaigns and wonder why their ACoS is high. Build a proper three-tier structure: Auto campaigns for discovery, Broad/Phrase manual campaigns for scaling, and Exact match campaigns for proven top performers. Move budget toward exact match as you accumulate conversion data.

3. Improve Your Listing Conversion Rate

A higher conversion rate directly lowers your effective cost per acquisition because you need fewer clicks to generate each sale. Invest in professional photography, compelling A+ Content, and proactive review generation. Even a 1% improvement in conversion rate meaningfully reduces ACoS and improves organic ranking simultaneously.

4. Optimize Bids by Placement

Amazon allows you to adjust bids by placement — Top of Search, Product Pages, and Rest of Search. Analyze which placements convert best for your specific products and increase bids for high-performing placements while reducing bids for underperformers. This optimization alone frequently delivers 15–25% ACoS reductions.

5. Pause Underperforming Keywords

Not every keyword will be profitable for every product. If a keyword has accumulated significant spend with zero conversions, pause it. Focus your budget on keywords proven to convert for your specific product in your specific category. Being ruthless about pausing underperformers is one of the most impactful habits in Amazon PPC management.

How to Improve TACoS Over Time

Use PPC to Build Organic Ranking

Use PPC strategically to rank for your top organic keywords. Higher organic rankings reduce your reliance on paid traffic over time, causing TACoS to naturally decrease as organic sales grow. This is the compounding flywheel of Amazon advertising done right.

Build External Traffic Sources

External traffic from social media, email lists, and influencer marketing counts toward total revenue without adding to ad spend — directly improving your TACoS ratio. Amazon's Brand Referral Bonus program rewards sellers who drive external traffic with a 10% rebate on resulting sales.

Grow Reviews Consistently

More reviews improve organic conversion rates → which improves organic ranking → which increases organic sales → all without adding to your ad budget. Proactive review generation is one of the highest-ROI activities for improving TACoS over a 6–12 month timeframe.

Tracking Both Metrics Together

Track ACoS at the campaign level (to manage individual campaign profitability) and TACoS at the account level (to understand the overall health of your advertising investment). When both are trending down while total revenue is growing, you've achieved the goal of sustainable, profitable Amazon advertising.

Want our team to audit your current ACoS and TACoS performance? Get in touch for a free PPC audit — we'll show you exactly which campaigns are profitable and which are silently draining your margins.