What Is Dead Stock in Amazon FBA?
Dead stock is inventory that has effectively stopped selling. The standard threshold is 90 or more consecutive days with fewer than 1-2 units sold, though the exact definition varies by category and seller. Dead stock differs from slow-moving SKUs in degree: slow-movers still sell, just slowly. Dead stock has flatlined.
Dead stock represents the worst possible position for FBA capital: it earns zero return while actively bleeding money through storage fees, capital cost, and opportunity cost. Every cubic foot occupied by dead stock is a cubic foot unavailable for A-tier inventory that would actually generate revenue.
The danger with dead stock is that it compounds. The longer it sits, the more expensive it gets, and the harder it becomes to justify the removal action that would stop the bleeding. Many sellers hold dead stock past the breakeven point hoping for a turnaround that will not come. The math is rarely on their side after day 180.
Quantifying the Cost of Holding Dead Stock
The total monthly cost of dead stock has three components:
Total Holding Cost = Monthly Storage Fee + Aged Inventory Surcharge + Capital Opportunity Cost
Monthly Storage Fee:
- Standard size: $0.87/cubic foot (Jan-Sep), $2.40/cubic foot (Oct-Dec)
- Oversize: $0.56/cubic foot (Jan-Sep), $1.40/cubic foot (Oct-Dec)
Aged Inventory Surcharge (kicks in based on days in fulfillment center):
| Inventory Age | Aged Surcharge ($/cu ft/month) |
|---|---|
| 0-180 days | $0.00 |
| 181-210 days | $1.50 |
| 211-240 days | $3.80 |
| 241-270 days | $4.20 |
| 271-300 days | $4.60 |
| 301-330 days | $5.30 |
| 331-365 days | $6.00 |
| 365+ days | $6.90 |
Capital Opportunity Cost = Inventory Cost x Cost of Capital Rate (typically 8-15% annual)
Worked Example: When Removal Beats Holding
200 units of a $35 retail product, 0.25 cubic feet each, COGS $9 per unit, currently 270 days in FBA with no recent sales.
Total cubic feet: 200 x 0.25 = 50 cu ft
Monthly costs at day 270:
- Standard storage (assume Jan-Sep): 50 x $0.87 = $43.50/month
- Aged surcharge at day 271-300: 50 x $4.60 = $230.00/month
- Capital opportunity cost: ($1,800 inventory cost x 12%) / 12 = $18.00/month
- Total monthly cost: $291.50
Projected costs over the next 6 months (assuming inventory ages further into higher surcharge brackets):
- Months 1-2 (days 270-330): $291.50 x 2 = $583.00
- Months 3-4 (days 331-365): ($43.50 + $300.00 + $18.00) x 2 = $723.00
- Months 5-6 (days 365+): ($43.50 + $345.00 + $18.00) x 2 = $813.00
- 6-month projected holding cost: $2,119.00
Removal cost: 200 units x $1.04 = $208.00 (one-time fee, then no further FBA storage)
Liquidation value (5-10% of retail): 200 x $35 x 0.075 = $525.00
Decision math:
- Hold and hope: $2,119 lost over 6 months, plus inventory still unsold
- Remove and resell elsewhere (assume 30% net of retail): -$208 removal + $2,100 resale = +$1,892
- Liquidate via Amazon: $525 net
Removal with alternate-channel resale is the clear winner here. Even straight liquidation beats holding by $2,644 over the next 6 months. The math says act now.
Why Dead Stock Compounds in FBA
Amazon's aged inventory surcharge structure deliberately makes dead stock more expensive over time. The fee escalation from $1.50 at day 181 to $6.90+ at day 365 is roughly 4.6x. Combined with the standard storage fee, dead stock that sits for a full year can cost 8-10x its first-year storage rate.
The Q4 multiplier compounds this further. Standard storage fees triple from October through December. Dead stock that arrived in summer pays the full Q4 rate for three months at the exact time you would prefer to use that storage capacity for high-velocity holiday SKUs.
IPI score is the second-order penalty. Dead stock raises your excess inventory percentage and lowers sell-through rate, both of which pull IPI down. Lower IPI means lower storage limits in the next quarter, which means less capacity for the products that would actually generate revenue. Dead stock has a way of making the rest of your catalog suffer.
Common Dead Stock Mistakes
1. Waiting too long to act. Aged surcharges scale steeply after day 180. A seller who decides to address dead stock at day 180 pays roughly half what a seller pays at day 270 for the same inventory. The longer you wait, the worse the math gets, and the harder it is to justify a removal that should have happened months earlier.
2. Liquidating inventory that could be rescued. Some "dead" SKUs are actually slow-movers that need a 15-20% price drop, a refreshed listing, or a Lightning Deal to clear. Before pulling the trigger on removal, run a 30-day rescue test: drop price, refresh PPC, and see if velocity recovers. If not, then escalate.
3. Not tracking per-SKU storage costs. Storage fees deduct in small monthly increments through settlement transfers. A seller who only looks at gross profit at the catalog level will miss dead stock costing them hundreds per month per SKU. Build per-SKU storage cost into your reporting so dead stock is impossible to hide.
Related Glossary Terms
Frequently Asked Questions
When should I remove dead stock from FBA?
Calculate the breakeven: when projected future holding costs (storage fees plus aged surcharges plus capital cost) over the next 6 months exceed the removal fee plus expected liquidation value. For most aged dead stock, the breakeven hits well before day 365 because surcharges scale steeply.
How does dead stock affect my IPI score?
Dead stock damages IPI through three sub-scores: excess inventory percentage rises, sell-through rate falls, and stranded inventory may also increase if listings get suppressed. A catalog with 20% or more dead stock typically sees IPI drop below 400, which can trigger restock limit reductions.
What is the difference between dead stock and slow-moving inventory?
Slow-moving inventory still sells, just at a low rate (e.g., 8 units/month). Dead stock has zero or near-zero sales (e.g., 1 unit per quarter). Slow-movers can sometimes be rescued with pricing or promotional adjustments. Dead stock typically requires removal, liquidation, or disposal.
Should I liquidate or remove dead stock?
Liquidation through Amazon's program nets roughly 5-10% of selling price with no further effort. Removal costs about $1.04 per unit but lets you recover inventory for resale through other channels at retail prices. If your alternate-channel net is more than 15-20% of selling price, removal beats liquidation.
How do I prevent dead stock from accumulating?
Order in smaller quantities matched to demand forecasts, not supplier MOQ. Run quarterly SKU rationalization. Track per-unit storage cost monthly. Set automated alerts when sell-through drops below 15% over 60 days. Catch slow movers before they become dead stock; the intervention is cheaper.