Avoid Long-Term Storage Fees Amazon: IPI & Inventory Tips

What Are Amazon Long-Term Storage Fees?

Amazon charges two types of storage fees when you use FBA: monthly storage fees and aged inventory surcharges (formerly called long-term storage fees).

The aged inventory surcharge applies to units that have been sitting in Amazon's fulfillment centers for more than 181 days. The longer the inventory stays, the higher the fee gets.

Here's the current fee structure (per cubic foot, charged monthly):

• 181–210 days: $0.50 or $0.10 per unit (whichever is greater)
• 211–240 days: $1.40 per cubic foot
• 241–270 days: $2.40 per cubic foot
• 271–300 days: $3.40 per cubic foot
• 301–330 days: $4.40 per cubic foot
• 331–365 days: $5.40 per cubic foot
• 365+ days: $6.90 per cubic foot

These fees stack on top of regular monthly storage fees. For oversized or slow-moving products, a single stuck unit can cost you more in fees than the product is worth. That's why avoiding long-term storage fees on Amazon is critical for protecting your margins.

Understanding Your IPI Score and Why It Matters

Your Inventory Performance Index (IPI) is a score from 0 to 1000 that measures how well you manage your FBA inventory. Amazon uses it to decide how much storage space you get, and a low score can lead to storage limits or overage fees.

Amazon calculates your IPI based on four key factors:

• Excess inventory percentage – how much stock you have beyond 90 days of supply
• Sell-through rate – units sold and shipped over the past 90 days
• Stranded inventory percentage – active inventory with listing issues
• In-stock rate – how often your top products stay in stock

IPI Score Targets

• Below 400: Risk of storage limits and capacity restrictions
• 400–500: Acceptable but needs improvement
• 500–650: Healthy, sustainable range
• 650+: Excellent, indicates strong inventory management

Aim for 500 or higher as a beginner. This keeps your storage capacity open and signals to Amazon that you're a reliable seller. Check your IPI weekly inside Seller Central under Inventory > Manage FBA Inventory > Performance.

The Inventory Management Checklist (Weekly)

Consistency beats reaction. A short weekly check stops aged inventory before it triggers fees. Run this 30-minute routine every Monday.

Weekly Inventory Checklist:

1. Review your IPI score – note any changes from last week
2. Check aged inventory report – identify units approaching 181 days
3. Audit stranded inventory – fix listings flagged as inactive or suppressed
4. Review sell-through rate – flag any SKU under 1.0 (less than one turnover per quarter)
5. Check restock recommendations – avoid over-ordering slow movers
6. Run a profitability check – confirm fees aren't eating margins
7. Plan promotions or removals – decide action for slow SKUs

This checklist works because it forces you to look at your inventory the same way Amazon does. Aged inventory and stranded listings are the two biggest IPI killers, and they're both easy to fix once you spot them early. Set a recurring calendar reminder so this becomes automatic.

How to Clear Slow-Moving Inventory Before Fees Hit

Once inventory crosses 120 days in storage, you have about two months before the aged surcharge starts. Use this window to take action.

Five proven ways to move slow inventory:

• Run a Lightning Deal or coupon – a 15–30% discount can spike velocity within days
• Lower your price strategically – even a small price cut can boost the Buy Box win rate
• Create a multi-pack listing – bundle slow units with faster movers
• Use Amazon Vine or PPC – more reviews and visibility drive conversions
• Run external traffic – send TikTok, Instagram, or email traffic to your listing

If none of these work and the math doesn't add up, it's better to remove or dispose of the inventory than pay escalating fees. Amazon's Removal Order option lets you ship the inventory back to yourself for around $1.00 per standard unit, and the liquidation option recovers 5–10% of the average sale price.

The rule of thumb: if storage fees over the next 6 months will exceed the product's recovery value, liquidate now.

How to Prevent Long-Term Storage Fees in the First Place

The best strategy is to never let inventory age in the first place. Beginners often over-order because shipping costs feel cheaper in bulk, but storage fees quietly cancel out those savings.

Prevention practices that work:

• Order based on 60–90 days of supply, not 6 months
• Use Amazon's restock recommendations as a starting point, not a rule
• Track sell-through monthly and adjust reorder quantities
• Stagger shipments instead of sending one large batch
• Test new products with small quantities (50–100 units) before scaling
• Forecast seasonal dips so you don't over-stock before slow months

For seasonal products, plan to be out of stock within 30 days after peak season ends. Holding holiday inventory through Q1 is one of the most expensive mistakes new sellers make.

Also, keep your catalog tight. Fewer SKUs mean easier forecasting, faster turnover, and a stronger IPI score. Many top sellers run 5–10 winning products instead of 50 average ones.

Tools and Reports That Make This Easier

You don't need fancy software to manage inventory well, but a few tools save time and prevent costly mistakes.

Free tools inside Seller Central:

• Inventory Age Report – shows exactly how long each unit has been in storage
• FBA Inventory Report – full snapshot of stock, fees, and sell-through
• Restock Inventory Tool – recommended reorder dates and quantities
• Manage Excess Inventory – flags slow movers with suggested actions

Paid tools worth considering once you scale:

• Helium 10 Inventory Manager – forecasting and automated alerts
• SoStocked – built specifically for Amazon inventory planning
• InventoryLab – combines accounting and inventory tracking

Start with the free Seller Central reports. They cover 90% of what beginners need. Once you're managing 10+ SKUs or doing $20K+ per month in revenue, paid tools start to pay for themselves by preventing stockouts and over-orders.

The biggest mistake isn't using the wrong tool, it's not checking the reports at all.

Conclusion

Avoiding long-term storage fees on Amazon isn't about luck, it's about systems. Track your IPI score weekly, follow a simple inventory checklist, clear slow movers before fees hit, and order in smaller, more frequent batches.

Keep your IPI above 500, your aged inventory near zero, and your catalog focused on products that actually sell.

Your next step: Log into Seller Central today, open your Inventory Age Report, and identify any SKU over 120 days old. Decide right now whether to promote, discount, or remove it. That single action could save you hundreds of dollars in fees over the next 90 days.