Amazon Storage Fee Calculator
Calculate monthly storage costs and aged inventory surcharges
Product Dimensions
Storage Period
Aged inventory surcharge applies after 181 days
Monthly Storage Fee
$0.00
base fee
Total Storage Cost
$0.00
for 1 month
Storage Fee Breakdown
Cost Per Unit
Monthly / Unit
$0.00
Daily / Unit
$0.000
Amazon FBA Storage Fee Rates
Monthly Storage Fees (per cubic foot)
| Size Category | Off-Peak | Peak (Q4) |
|---|---|---|
| Standard-Size | $0.78 | $2.40 |
| Oversized / Large Bulky | $0.56 | $1.40 |
Off-Peak: Jan 1 - Sep 30 | Peak: Oct 1 - Dec 31
Aged Inventory Surcharge (per cubic foot)
| Days in Storage | Surcharge |
|---|---|
| 0 - 180 days | $0.00 |
| 181 - 210 days | $0.50 |
| 211 - 240 days | $1.00 |
| 241 - 270 days | $1.50 |
| 271 - 365 days | $1.80 |
| 365+ days | $6.90 |
When to Use This Calculator
Inventory Planning
Before sending inventory to FBA, calculate what it'll cost to store. Sending 1,000 units that take 3 months to sell? That's 3 months of storage fees eating your margins. Know the cost upfront.
Q4 Budgeting
Peak season storage fees are brutal - nearly 3x off-peak rates. Toggle between seasons to see the difference. If you're holding inventory through Q4, factor these higher costs into your holiday pricing.
Aged Inventory Decisions
Got products approaching 181 days? Calculate the surcharge you'll face. Sometimes it's cheaper to run a deep discount or create a removal order than to pay months of aged inventory fees.
Product Size Optimization
Smaller packaging = lower storage fees. Use this calculator to see how reducing dimensions by even an inch affects your monthly costs. Multiply by 12 months and thousands of units - it adds up.
Profit Margin Analysis
Storage fees are often forgotten in profit calculations. A product sitting 60 days before selling has 2 months of storage costs. Include this in your true cost-per-unit for accurate margins.
FBA vs 3PL Comparison
Considering third-party logistics? Calculate your FBA storage costs here, then compare to 3PL quotes. For slow-moving or oversized items, external warehousing might save money.
Frequently Asked Questions
How are storage fees calculated?
Amazon measures your inventory's cubic feet (length × width × height ÷ 1728) and multiplies by the rate per cubic foot. They use average daily volume, so fees are prorated if inventory levels change during the month.
What's the difference between off-peak and peak?
Off-peak (Jan-Sep) is cheaper: $0.78/cu ft for standard items. Peak season (Oct-Dec) jumps to $2.40/cu ft - over 3x more. Amazon raises rates during Q4 because warehouse space is at a premium during holiday rush.
When does aged inventory surcharge apply?
After 181 days in Amazon's warehouse. Starts at $0.50/cu ft and escalates to $6.90/cu ft after a year. Amazon checks on the 15th of each month. Set reminders at 150 days to decide: discount, remove, or accept the fee.
Are oversized items cheaper to store?
Per cubic foot, yes - $0.56 vs $0.78 off-peak. But oversized items take up more space, so total cost is usually higher. A 5 cu ft oversized item costs $2.80/month vs a 0.5 cu ft standard item at $0.39/month.
How can I reduce storage fees?
Send smaller, more frequent shipments instead of bulk. Remove slow movers before 181 days. Optimize packaging to reduce cubic feet. Run promotions to increase velocity. Consider AWD (Amazon Warehousing) for bulk storage at lower rates.
What is storage utilization surcharge?
If you store way more than you sell (ratio over 26 weeks of supply), Amazon adds extra fees. It penalizes sellers using FBA as cheap warehousing. Keep inventory lean - ideally 4-8 weeks of supply.
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