10-Point Amazon FBA Due Diligence Checklist for Buyers

Acquiring an Amazon FBA business requires thorough due diligence to uncover potential risks, verify seller claims, and ensure you’re making a sound investment. This comprehensive 10-point checklist covers the critical areas specific to Amazon FBA businesses that every buyer must investigate before closing a deal.

1. Amazon Seller Account Health and History

The seller account is the foundation of any Amazon FBA business, and its health directly impacts future performance.

Critical verification steps:

• Request screenshots of the Account Health dashboard showing metrics for the past 12 months
• Verify the account has never been suspended or received serious violations
• Check the Order Defect Rate (ODR) remains below 1% historically
• Review all intellectual property complaints and their resolutions
• Examine customer service performance metrics (response times, case resolution)
• Verify seller performance rating (should be >95%)
• Check for any active restrictions on listing new products
• Review Inventory Performance Index (IPI) score history (should be consistently above 400)

Red flags to watch for:

• Multiple policy warnings within the past 6 months
• Any account suspension history, even if resolved
• Restricted product categories that limit expansion
• Declining IPI scores over time
• Excessive A-to-z guarantee claims

A healthy Amazon account is non-negotiable. Even temporary suspensions in the past indicate potential compliance issues that could resurface.

2. Product Portfolio Analysis

The strength and sustainability of the product line determines the business’s future viability.

Critical verification steps:

• Analyze sales distribution across all SKUs (identify revenue concentration)
• Verify sales history for top 5 products (minimum 12 months of data)
• Examine Best Seller Rank (BSR) trends for all products
• Check for seasonal patterns in sales data
• Review product life cycle stages for core products
• Analyze competitive landscape for each major product
• Verify brand registry status and trademark protections
• Evaluate product review profiles (quantity, quality, velocity)

Red flags to watch for:

• Single product representing >50% of revenue
• Declining BSR trends across multiple products
• Heavy seasonality without corresponding inventory planning
• Products in mature/declining market categories
• Unusually high review velocity suggesting manipulation
• Recent negative review patterns mentioning quality issues
• Products with significant competitive pressure from Amazon Basics

Ideally, no single product should represent more than 30% of total revenue, and the top 3 products should have stable or improving BSR trends.

3. Financial Verification and Analysis

Amazon FBA businesses have unique financial considerations that require specialized scrutiny.

Critical verification steps:

• Match Amazon disbursement reports with bank statements (minimum 12 months)
• Reconcile inventory purchases with supplier invoices
• Verify COGS calculations and gross margin consistency
• Analyze profitability by SKU (including PPC costs)
• Review FBA fee history and recent/announced changes
• Examine refund and return rates by product
• Verify inventory valuation methodology
• Review storage fee history and long-term storage charges

Red flags to watch for:

• Unexplained discrepancies between reported and actual revenue
• Significant increases in COGS without corresponding price adjustments
• Rising return rates (>3% is concerning for most categories)
• Increasing storage fees suggesting slow-moving inventory
• Declining gross margins across multiple products
• Heavy reliance on peak season for profitability

Request profit and loss statements categorized by product and marketplace to identify underperforming segments that may need improvement or discontinuation.

4. Supply Chain and Inventory Management

Amazon FBA businesses live or die by their supply chain efficiency and inventory management practices.

Critical verification steps:

• Verify supplier relationships and agreements (request direct contact)
• Review lead times and consistency of delivery
• Examine minimum order quantities and their financial impact
• Assess supplier concentration risk
• Review inventory turnover rates by SKU
• Analyze stockout history and impact on sales
• Evaluate inventory forecasting systems and accuracy
• Check for supplier exclusivity or preferential terms

Red flags to watch for:

• Single supplier for >50% of products
• Suppliers unwilling to confirm relationship continuation
• Increasing lead times or minimum order quantities
• Frequent stockouts impacting search ranking
• High levels of aged inventory (>180 days)
• Significant inventory in hazmat or oversized categories (higher fees)
• No formal supplier agreements or contracts

Optimal inventory management should maintain 60-90 days of inventory for most products, with strategic exceptions for seasonal items or products with extremely long lead times.

5. Amazon PPC and Marketing Analysis

Amazon advertising is increasingly critical to FBA success and requires specialized analysis.

Critical verification steps:

• Review advertising campaign structure and history (minimum 12 months)
• Calculate Advertising Cost of Sale (ACoS) trends by product
• Measure Total Advertising Cost of Sale (TACoS) impact on profitability
• Analyze organic vs. sponsored sales ratio
• Examine keyword ranking history for top products
• Review bid strategy and automation rules
• Evaluate A/B testing history and results
• Assess external traffic sources and their performance

Red flags to watch for:

• Rising ACoS without corresponding sales increases
• High (>30%) dependence on PPC for total sales
• Declining organic keyword rankings
• Poor campaign structure lacking targeting refinement
• Absence of product targeting campaigns
• No defensible keyword strategy or ranking advantages
• Over-reliance on aggressive bidding rather than listing optimization

A healthy FBA business typically maintains ACoS below 20% while achieving consistent organic growth alongside sponsored performance.

6. Listing Quality and Optimization

The technical quality of Amazon listings directly impacts conversion rates and organic ranking potential.

Critical verification steps:

• Audit product listing compliance with current Amazon standards
• Evaluate keyword optimization in titles, bullets, and descriptions
• Check A+ content quality and conversion impact
• Review product image quality and compliance
• Verify mobile optimization of all listing elements
• Assess listing change history and performance impact
• Check for duplicate listings or variations issues
• Review Amazon choice badge status and requirements

Red flags to watch for:

• Non-compliant listings facing potential suppression
• Keyword stuffing that risks future penalties
• Poor quality images or insufficient image count
• Missing A+ content for brand registered products
• Inconsistent brand messaging across listings
• High traffic but low conversion indicating listing problems
• Recent negative reviews mentioning misleading descriptions

High-quality listings should have conversion rates above category averages (typically 10-15% for most categories) and maintain stable or improving search visibility.

7. Customer Base and Reviews Analysis

The customer foundation and social proof of an FBA business are critical long-term assets.

Critical verification steps:

• Analyze customer demographics and purchasing patterns
• Review customer feedback metrics and sentiment trends
• Examine review velocity and authenticity signals
• Evaluate repeat purchase rate for non-consumable products
• Check for review manipulation warning history
• Analyze negative review patterns and seller responses
• Assess brand loyalty indicators (follow/subscribe rates)
• Review any active product inserts or warranty programs

Red flags to watch for:

• Abnormal review velocity suggesting manipulation
• Pattern of similar reviews suggesting coordinated efforts
• High negative review percentage in recent months (>10%)
• Declining response quality to customer questions
• Poor seller responses to negative reviews
• Absence of repeat customers for consumable products
• Active review manipulation investigations

Healthy FBA businesses typically show organic review growth correlating with sales volume (2-5% review rate) and stable or improving rating averages.

8. Competitive Landscape Analysis

Understanding the competitive environment is essential for projecting future performance.

Critical verification steps:

• Identify direct competitors for top 5 products
• Track competitor pricing strategies and frequency of changes
• Analyze new entrants in the category (last 6-12 months)
• Review Amazon’s own product development in the category
• Check patent and trademark protections against competitors
• Evaluate barriers to entry for key products
• Assess market share trends within the category
• Review advertising costs trends in the category

Red flags to watch for:

• Rapidly increasing competition in main categories
• Amazon Basics products launching in your categories
• Declining price points across the category
• Patent or trademark infringement claims within the niche
• Significant advertising cost increases due to competition
• Major brands entering previously niche categories
• Counterfeit products affecting legitimate sales

The strongest FBA businesses have created defensible positions through brand strength, unique features, or exclusive supplier relationships that maintain competitive advantages.

9. Growth Potential and Scalability

Evaluating future potential is critical for determining the true value of an FBA acquisition.

Critical verification steps:

• Analyze untapped markets and expansion potential
• Review new product development pipeline
• Evaluate cross-selling opportunities within existing customers
• Assess international marketplace expansion viability
• Review PPC scaling potential and untapped keywords
• Analyze pricing elasticity and optimization opportunities
• Evaluate potential for Amazon program enrollment (Subscribe & Save, etc.)
• Assess external channel development potential (off-Amazon)

Red flags to watch for:

• Saturated core markets with limited expansion potential
• No product development strategy or pipeline
• Declining category trends in market research
• Prohibitive barriers to international expansion
• Limited capacity with current suppliers to scale production
• No customer data or email capture strategy
• Maximum keyword coverage already achieved

Look for businesses with clear, actionable growth levers that haven’t been fully optimized by the current owner.

10. Operational Systems and Transferability

The systems, processes, and knowledge transfer will determine your success after acquisition.

Critical verification steps:

• Document all tools, software, and subscriptions used
• Review standard operating procedures (SOPs) for all processes
• Evaluate team structure and key personnel dependencies
• Assess automation level and manual intervention requirements
• Review seller training and transition plan
• Verify all accounts are properly transferable
• Check for undisclosed operational costs
• Evaluate current owner’s time investment and role

Red flags to watch for:

• Absence of documented processes or systems
• Heavy reliance on owner’s personal relationships
• Proprietary systems without proper documentation
• Excessive manual processes without automation
• Restrictive software licenses that aren’t transferable
• Unrealistic claims about time investment
• Team members unwilling to continue post-sale

The most valuable FBA businesses have comprehensive documentation, minimal owner involvement in day-to-day operations, and scalable systems that can grow with the business.

Professional Due Diligence Resources

For comprehensive due diligence on Amazon FBA businesses, these professional services provide specialized assistance:

Empire Flippers: Offers pre-vetted FBA businesses with preliminary due diligence already completed, plus dedicated buyers’ advisors for transaction support.

FE International: Provides detailed business verification and due diligence assistance for larger FBA acquisitions.

Quiet Light: Specializes in operational due diligence and seller verification for online businesses including Amazon FBA.

Acquire.com: Formerly MicroAcquire, offers a platform connecting buyers with sellers and standardized due diligence frameworks.

Professional due diligence assistance typically costs $2,000-$10,000 depending on business size, but can save hundreds of thousands by identifying deal-breaking issues or negotiation leverage points.

The Bottom Line

Thorough due diligence on an Amazon FBA business is not merely about verifying financial statements—it’s about understanding the complex ecosystem of Amazon, the competitive landscape, and the operational realities of the specific business. By systematically working through each of these 10 critical areas, you’ll minimize acquisition risk and position yourself for post-purchase success.

Remember that Amazon FBA businesses face unique challenges and opportunities that traditional business due diligence might miss. Special attention to Amazon-specific factors like account health, review profiles, and PPC performance can make the difference between a successful acquisition and a costly mistake.