5 Reports That Reveal Hidden Profit Margins in Your Amazon Business

Revenue is only part of the story. If your Amazon business is growing but profits feel flat, it’s time to dig deeper.

Costs like oversized FBA fees, high ACOS/TACOS, and storage fees can quietly chip away at your margins. The good news? Amazon gives you the tools to catch them if you know where to look.

Here are the top 5 Amazon reports to review in order to audit profitability and uncover opportunities to improve it.

1. Fee Preview Report

Location:
Seller Central → Reports → Fulfillment → Fee Preview

Why It Matters:
This report shows Amazon’s calculated fulfillment fees for each of your FBA ASINs, based on size and weight.

How to Use It:

• Look for ASINs with fulfillment fees that seem unusually high relative to price or category.
• Check for discrepancies between actual product dimensions and what Amazon has listed. Even a 0.1″ increase can bump an item into a higher fee tier.
• Consider redesigning or repackaging products to reduce dimensional weight and fees.

Profit Tip: Reducing your item’s size tier can drop FBA fees by 30% or more, especially on high-volume SKUs.

2. Advertising Search Term Report

Location:
Advertising Console → Reports → Search Term

Why It Matters:
This report reveals which search terms are actually generating clicks and conversions in your PPC campaigns, and the search terms that are just costing you money.

How to Use It:

• Identify search terms with high spend but no conversions. These are profit killers. Add them as negative keywords.
• Look for non relevant search phrases and add negative phrase matches to your campaigns.
• Promote high-performing terms with strong ROAS into exact match campaigns with higher bids.
• Review and lower bids on high ACOS search terms (ad spend/ad sales).

Profit Tip: Even a 5% reduction in wasted ad spend can significantly boost net profit – especially if you reinvest into high-ROAS campaigns.

3. Inventory Health Report

Location:
Reports → Fulfillment → Inventory → Inventory Health

Why It Matters:
Storage fees are one of the easiest profit leaks to overlook. This report helps you identify aged inventory, overstock, and slow sellers driving up FBA costs.

How to Use It:

• Check for ASINs with 90+ days of supply or high storage volume. These tie up capital and drag down your IPI score.
• Run targeted promotions or ads to move aged units before long-term storage fees kick in.
• Stop reordering products that aren’t moving. Reallocate that budget to your top performers.

Profit Tip: Converting excess inventory into cash is often more valuable than waiting for full price – especially heading into Q4. Keeping your IPI score above 450 can have a much stronger impact on your profit then squeezing a few extra dollars out of slow moving inventory.

4. Statement Report (Amazon Profit & Loss)

Location:
Reports → Reports Repository → Statement View

Why It Matters:
This is your Amazon checkbook. It shows every financial transaction across sales, fees, promotions, and reimbursements – giving you a full profit-and-loss snapshot for your account.

How to Use It:

• Track net cash flow by date range. Are your payouts growing alongside revenue?
• Audit promotional discounts and returns. These often go unnoticed but reduce profit on paper.
• Cross-check fee totals against other reports like the Fee Preview to spot underperforming SKUs.
• Look for outliers such as fees that are larger then expected.

Profit Tip: Download this monthly and compare against your P&L to make sure you’re not missing fees or over crediting promotions.

5. Business Reports: Detail Page Sales and Traffic by Child ASIN

Location:
Reports → Business Reports → Detail Page Sales and Traffic by Child Item

Why It Matters:
This report combines sessions, unit sales, and conversion rate – a trifecta for understanding profitability per ASIN.

How to Use It:

• Sort by conversion rate. Low-performing SKUs may need image updates, pricing changes, or review boosts.
• Watch for drops in sessions. This can signal reduced ranking, Buy Box loss, or ad performance issues.
• Compare high-traffic, low-conversion listings to better-performing ones and apply what’s working.

Profit Tip: Increasing conversion rate by even 2–3% can significantly boost profitability without increasing ad spend.

Conclusion: Audit for Profit, Not Just Sales

Profit doesn’t come from top-line revenue. It comes from knowing your numbers, cutting waste, and fine-tuning what already works.

These five reports are your toolkit for doing just that. They show you exactly where your money is going.