Dead Stock Cost Calculator

About the Dead Stock Cost Calculator

Dead stock is inventory that has not sold and is unlikely to sell without significant markdowns or write-offs. It sits in your warehouse consuming storage space, incurring fees, and tying up capital that could be invested in profitable products.

The true cost of dead stock goes beyond the purchase price. It includes monthly storage fees, insurance, the opportunity cost of locked capital, and eventual liquidation losses. For Amazon FBA sellers, long-term storage fees can make dead stock especially punishing.

This calculator quantifies the total cost of dead stock across all dimensions: original investment, cumulative storage costs, and the opportunity cost of capital. Use it to make informed decisions about when to liquidate, donate, or dispose of non-moving inventory.

When This Page Helps

Most sellers underestimate dead stock costs because they only consider the purchase price. This calculator reveals the full financial impact including storage, opportunity cost, and liquidation losses, helping you make faster decisions about non-performing inventory.

How to Use the Inputs

1. Enter the number of dead stock units.
2. Enter the original cost per unit.
3. Enter the monthly storage cost per unit.
4. Enter the number of months the stock has been held.
5. Optionally enter the expected recovery value if liquidated.
6. Review the total cost and decide whether to liquidate, donate, or dispose.

Example Calculation

Tips & Best Practices

• Set a dead stock threshold — items with zero sales for 90+ days should be reviewed.
• Liquidate early. The longer you hold dead stock, the more you lose in storage and opportunity costs.
• Consider donation for tax write-offs if liquidation recovery is minimal.
• Track dead stock percentage monthly — target less than 5% of total inventory value.
• Prevent dead stock through better demand forecasting and smaller initial orders for new products.
• Use FBA removal orders before long-term storage fee deadlines to minimize Amazon penalties.

The Hidden Costs of Dead Stock

Beyond direct costs, dead stock consumes warehouse space that could hold profitable products, distracts your team with inventory management overhead, and may require special disposal procedures for certain product categories. These indirect costs often exceed the direct financial impact.

Dead Stock Prevention Framework

Implement a traffic light system: Green (selling well, reorder), Yellow (slowing, promote or discount), Red (dead, liquidate within 30 days). Review all inventory weekly and take escalating action as products move from green to yellow to red.

Dead Stock and Tax Implications

Dead stock write-offs and charitable donations can provide tax benefits. Section 170 of the tax code allows deductions for donated inventory. Consult a tax professional to understand how dead stock dispositions affect your specific tax situation and optimize timing.

Frequently Asked Questions

• What qualifies as dead stock?

  Dead stock is inventory with zero or near-zero sales over an extended period, typically 90–180 days. It differs from slow-moving stock in that there is no reasonable expectation of selling at the current price point without significant intervention.

• What are my options for dealing with dead stock?

  Options include deep discounts or flash sales, bundling with popular products, selling on liquidation marketplaces, donating for tax benefits, returning to the supplier, or disposing as a last resort. Choose based on which option minimizes total loss.

• How does dead stock affect my Amazon IPI score?

  Amazon's Inventory Performance Index penalizes excess and aged inventory. Dead stock lowers your IPI score, which can lead to storage limits. Regularly removing dead stock through sales, removal orders, or disposal helps maintain a healthy IPI.

• How do I calculate opportunity cost?

  Opportunity cost represents the return you could have earned by investing the dead stock capital elsewhere. Multiply the purchase value by your expected annual return rate (10–20% is typical for e-commerce) and prorate for the holding period.

• Should I write off dead stock immediately?

  Not necessarily. First try to recover some value through markdowns, bundles, or liquidation. Write off only if the cost of continued holding exceeds any potential recovery. Consult your accountant about timing write-offs for tax advantages.

• How can I prevent dead stock in the future?

  Start with smaller test orders for new products, improve demand forecasting, monitor sell-through rates weekly, set automatic alerts for slow-moving inventory, and establish a clear dead stock policy with escalating interventions at 60, 90, and 120 days. A proactive approach that catches slow sellers early is far cheaper than dealing with dead stock after it has been sitting in your warehouse for months.