Amazon Inventory Health Report: How to Read It, Use It, and Stop Paying Fees You Don’t Have To

Table of Contents

• What the Inventory Health Report Actually Tells You
• How to Access the Report in Seller Central
• The Fields That Matter - and the Ones You Can Ignore
• Three Fee Triggers Hidden in Your Report
• How to Read Weeks of Cover Like a Repricer
• A Weekly Review That Takes 15 Minutes
• Inventory Health Report vs. Manage Inventory Health Page
• FAQ

Most sellers download this report once, get overwhelmed by 40+ columns, and never open it again. That’s a mistake that costs real money - because buried in those columns are three fee triggers that silently erode your margins every month.

The Inventory Health Report is not a status update. It’s a fee forecast. Every row tells you exactly how much each SKU is costing you in storage, what it will cost next month, and whether you should restock, reprice, or remove it. Once you know which columns to watch, a 15-minute weekly review can save you $1,000+ per month in avoidable fees.

What the Inventory Health Report Actually Tells You

The Inventory Health Report is an FBA-exclusive download that gives you a per-SKU breakdown of your inventory stored in Amazon fulfillment centers. It covers four dimensions that no other single report combines:

1. What you have - sellable and unsellable quantities by ASIN, FNSKU, and SKU
2. How fast it’s moving - units sold across six time windows (24 hours through 365 days)
3. How long it’s been sitting - inventory age buckets from 0-90 days up to 365+ days
4. What it’s going to cost you - projected aged inventory surcharges and competitive pricing data

That last dimension is what separates this report from a simple stock count. It tells you not just what’s in the warehouse, but what’s about to get expensive.

How to Access the Report in Seller Central

Navigate to Reports > Fulfillment > Inventory > Inventory Health in your Seller Central account. You can download it as .csv or .txt - the .csv format opens directly in Excel or Google Sheets for sorting and filtering.

The report data runs 24-72 hours behind real time. For same-day visibility, use the Manage Inventory Health dashboard instead (more on that below).

The Fields That Matter - and the Ones You Can Ignore

The report has over 40 columns. Here are the ones that drive decisions, grouped by what they tell you.

Inventory Age Breakdown

Column	What It Means	Why It Matters
Units 0-90 days	Fresh inventory	No fee risk
Units 91-180 days	Aging stock	Start monitoring sell-through
Units 181-270 days	Warning zone	Plan markdowns or promotions
Units 271-365 days	Surcharge territory	Aged inventory surcharge applies
Units 365+ days	Maximum surcharge	$0.35/unit/month or $7.90/ft³ - remove unless the product justifies it

The 271-day column is the one most sellers miss. Amazon renamed “Long-Term Storage Fees” to the Aged Inventory Surcharge and moved the threshold from 365 days down to 271 days. If you’re still thinking in terms of a one-year deadline, you’re already late.

Sales Velocity

Six columns show units sold in the last 24 hours, 7 days, 30 days, 90 days, 180 days, and 365 days. The 30-day and 90-day figures matter most - they drive your weeks-of-cover projections and directly affect your IPI sell-through rate.

Weeks of Cover

Five columns project how long your current stock will last based on sales velocity over 7, 30, 90, 180, and 365 days. The 30-day weeks of cover is your primary decision metric. It tells you whether you’re understocked, overstocked, or sitting in the safe zone.

Competitive Pricing

The report shows lowest FBA and individual seller prices in New and Used conditions. Useful for spotting gaps, but don’t over-index - the data lags 24-72 hours. For live competitive analysis, use repricing tools or the Amazon Reports section.

Three Fee Triggers Hidden in Your Report

Your Inventory Health Report data maps directly to three fee thresholds. Miss any one of them and you’re paying money you didn’t plan for.

1. Low Inventory Level Fee (Below 28 Days)

If your inventory drops below 28 days of supply for a given seller-FNSKU, Amazon charges $0.32-$2.09 per unit depending on size, weight, and how far below the threshold you fall. This fee was recalculated in 2026 to apply at the seller-FNSKU level rather than the parent ASIN level.

The column to watch: weeks of cover (30-day) below 4. If you see it, restock immediately.

2. Aged Inventory Surcharge (271+ Days)

Inventory Age	Monthly Surcharge
271-365 days	Standard aged surcharge
12-15 months	$0.30/unit or $6.90/ft³ (whichever is greater)
15+ months	$0.35/unit or $7.90/ft³ (whichever is greater)

The 12-15 month tier doubled from $0.15 to $0.30 per unit. The 15+ month tier at $0.35 is new for 2026.

Check the 271-365 day and 365+ day columns. If either shows units, run the math: does the monthly surcharge exceed 10% of your selling price? At $0.30/unit/month, a $10 product loses 3% margin every month just sitting there. That’s your signal to remove.

3. Storage Utilization Surcharge (26+ Weeks)

If your inventory exceeds 26 weeks of supply, Amazon applies a Storage Utilization Surcharge of up to $10 per cubic foot on excess inventory. This was introduced in April 2025 and catches sellers who overbuy heading into Q4.

Your early warning: weeks of cover (90-day) climbing above 26. Slow your replenishment before the surcharge kicks in.

The Safe Zone

The math boils down to a narrow band: keep 30-60 days of supply per SKU. Below 28 days, you pay the Low Inventory Level fee. Above 26 weeks, you pay the Storage Utilization Surcharge. Go past 271 days and the Aged Inventory Surcharge stacks on top of everything.

How to Read Weeks of Cover Like a Repricer

Here’s the trick most sellers miss: compare the 7-day and 30-day weeks-of-cover figures for the same SKU.

• 7-day WoC much higher than 30-day WoC → Sales have recently slowed down. Something changed - a competitor undercut you, your listing got suppressed, or seasonality shifted. Investigate before the inventory ages into surcharge territory.
• 7-day WoC much lower than 30-day WoC → Sales have recently spiked. Great, but you may be heading toward a stockout. Check if you need to expedite a restock.
• Both figures roughly aligned → Stable demand. Manage normally.

This comparison takes 30 seconds per SKU and catches problems weeks before they become fee events.

A Weekly Review That Takes 15 Minutes

Download the report every Monday. Sort and filter through these steps:

1. Sort by 271-365 day units (descending). Flag anything above zero. Decide: discount, remove, or accept the surcharge.
2. Filter for weeks of cover (30-day) below 4. These are your restock-now SKUs. Cross-reference with the estimated restock quantity Amazon suggests.
3. Filter for weeks of cover (90-day) above 26. These are your overstock SKUs. Pause replenishment and consider running Fulfillment by Amazon promotions.
4. Check unsellable quantity. Any non-zero values represent stranded inventory eating storage fees with zero sales. Fix listing issues or create removal orders.
5. Compare your price to lowest FBA price. Large gaps on high-velocity SKUs suggest a repricing opportunity.

This routine directly feeds your IPI score. The four IPI factors - excess inventory percentage, stranded inventory percentage, sell-through rate, and in-stock rate - all map to columns in this report. Sellers who maintain an IPI above 400 avoid storage restrictions; those below face capacity limits that can cascade into stockouts and lost sales.

Stop guessing at your inventory strategy. Feedvisor’s AI-powered platform connects pricing, advertising, and inventory data to show you exactly which SKUs need action - and what that action should be. Learn how Feedvisor optimizes inventory decisions →

Inventory Health Report vs. Manage Inventory Health Page

Amazon offers two ways to view inventory health data. Know when to use each.

Feature	Downloadable Report	Manage Inventory Health Page
Access path	Reports > Fulfillment > Inventory	Inventory > Inventory Planning
Format	.csv / .txt (full data export)	Online interactive dashboard
Best for	Deep analysis, spreadsheets, BI tools	Quick checks, bulk removals
Scope	All FBA inventory with 40+ columns	Focused on excess and aged inventory
Bulk actions	None	Remove or liquidate up to 50 items at once
Data lag	24-72 hours	~1 day
Items per view	Unlimited (full download)	250 ASINs per page

Use the downloadable report for your weekly deep dive and when you need to build custom dashboards or feed data into inventory planning tools. Use the Manage Inventory Health page for daily spot-checks and when you need to quickly remove or liquidate aged stock.

The Manage Inventory Health page consolidated three older tools - FBA Inventory Age, online Inventory Health, and Excess Inventory - but the downloadable report remains available.

FAQ

How often should I download the Inventory Health Report?

Weekly is the minimum. Download every Monday, review the five-step checklist above, and act on anything that crosses a fee threshold. Data runs 24-72 hours behind, so daily downloads add little value unless you have high-velocity SKUs at risk of stockout.

What is a good IPI score, and how does this report affect it?

An IPI score above 400 keeps you clear of storage restrictions. The score is calculated from four factors - excess inventory percentage, stranded inventory percentage, sell-through rate, and in-stock rate - all of which are visible in the Inventory Health Report. Reducing excess and stranded inventory while maintaining sell-through above 3.0 (units sold in 90 days / average units in stock) typically pushes your IPI above 400.

When should I remove inventory instead of discounting it?

When the monthly surcharge cost exceeds your realistic chance of selling the unit. For example, 100 units at 12 months in storage cost $30/month in aged surcharges alone, plus $7.80 in monthly storage (assuming 0.1 ft³ per unit at $0.78/ft³). If removal costs $0.50/unit ($50 total), you break even against surcharges in under two months. The report’s age columns make this calculation straightforward for every SKU.

Has the long-term storage fee threshold changed?

Yes. Amazon renamed “Long-Term Storage Fees” to the “Aged Inventory Surcharge” and moved the threshold from 365 days to 271 days. As of 2026, the 12-15 month tier charges $0.30/unit (doubled from $0.15), and a new 15+ month tier charges $0.35/unit or $7.90/ft³.

Can I use this report for non-FBA inventory?

No. The Inventory Health Report is exclusive to FBA inventory. If you sell via FBM, your inventory tracking happens through your own warehouse management system, not Amazon’s reports.