Storage Fee
The storage fee is the monthly charge Amazon levies per cubic foot/metre for inventory sitting in FBA warehouses. Long-term storage fees and aged-inventory surcharges escalate sharply on units that linger past 6–12 months.
The storage fee is what Amazon charges to hold FBA inventory in its warehouses. It is calculated per cubic foot (US) or per cubic metre (EU) per month, and stacks separately from the per-unit FBA fee.
Three storage charges that stack
| Charge | When | How much (US, indicative) |
|---|---|---|
| Monthly storage | Always | $0.87/cu ft (Jan–Sep), $2.40/cu ft (Oct–Dec) |
| Aged-inventory surcharge | Units >181 days in FBA | $0.50–$6.90 per cubic foot, escalating by age band |
| Storage utilisation surcharge | Over IPI / utilisation threshold | $0.04–$2.99/cu ft based on ratio |
Q4 storage rates roughly 2.8× standard rates — Amazon's lever to push sellers to clear inventory before peak.
Why storage fees crush long-tail SKUs
A slow-moving SKU at 4 units/month with 200 units in stock has 50 months of cover. Past 6 months, aged-inventory surcharges begin; past 12 months they escalate aggressively. A unit costing €0.15/month to store at month 1 can cost €1.40/month by month 13. On a €12 ASP product, three months of high-tier aged storage is the entire margin.
Inventory health practices
To keep storage fees under control:
- Months-of-cover discipline. Target 60–90 days of cover for top sellers, 30–45 for second-tier, 30 max for long-tail.
- Monthly removal orders for any SKU forecast to cross the 181-day aged threshold.
- Liquidate before aged tier escalation. Amazon's automated liquidation typically recovers 10–15% of value — worse than nothing but better than escalating storage.
- Pre-Q4 lean. Clear long-tail before October to avoid the 2.8× Q4 multiplier.
Storage fee × IPI
Amazon's Inventory Performance Index (IPI) scores account-wide inventory health. Below the threshold (typically 400), the storage utilisation surcharge kicks in across the whole account — punishing every SKU, not just the slow movers. IPI is recalculated quarterly.
Common mistakes
- Aggressive inbound for Q4 without sell-through plan. Excess October stock pays the 2.8× rate from the moment it arrives.
- Ignoring aged-inventory alerts. They escalate silently; the fee shows up on the invoice without warning.
- Liquidating too late. Past 360 days, recovery is near zero and storage fees have already eaten the value.
- Not separating storage from FBA fees in COGS. Storage is volume-driven; FBA fee is order-driven. Different decisions.