Amazon FBA storage fees are one of the most overlooked costs in an FBA business — and one of the most punishing. Every cubic foot you occupy in an Amazon warehouse costs money every month, and during peak season (October–December), that cost triples. Understanding these fees is essential for protecting your margins and avoiding nasty surprises in your monthly settlement reports.

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Amazon FBA seasonal storage fees: standard vs peak season (Oct–Dec) comparison.

How Much Are Amazon FBA Storage Fees in 2026?

Here are the official 2026 FBA storage fee rates:

2026 Amazon FBA Storage Fee Tiers
Size Tier Jan–Sep (per cu ft) Oct–Dec (per cu ft)
Standard Size $0.78 $2.40
Oversize $0.56 $1.40
Top of Pod (Special Oversize) $0.56 $1.40

Fees are calculated monthly based on the average daily volume of your inventory. Amazon measures your items at the cubic foot level, so even small products with bulky packaging can eat into your profits.

How Does Amazon Calculate Storage Volume?

Amazon calculates your storage fees based on the cubic footage your inventory occupies. Here's the formula:

Volume per unit (cu ft) = (Length × Width × Height) ÷ 1,728

Amazon measures the largest corresponding side of your packaged product. If your item is 10" × 8" × 2" and weighs 12 oz, the volume is:

10 × 8 × 2 ÷ 1,728 = 160 ÷ 1,728 = 0.0926 cubic feet per unit

Multiply that by your units in stock, then by the rate — that's your monthly storage fee.

What Are Amazon's Long-Term Storage Fees?

Important: Items stored in Amazon's warehouse for more than 180 days face steep additional surcharges. Amazon evaluates inventory on the 15th of each month.
Storage Duration Additional Surcharge
181–365 days $6.90 per cubic foot
365+ days $15.60 per cubic foot

These surcharges can completely wipe out your profit on slow-moving inventory. A product sitting for a year at 0.1 cubic feet per unit will cost you $1.56 per unit in long-term storage fees alone — before standard storage costs.

Real-World Example: What Storage Really Costs

Scenario: You sell 500 units of a t-shirt. Each packaged unit measures 10" × 8" × 2" (0.0926 cu ft). You hold them for 90 days starting in January.

Cost Item Calculation Amount
Total Volume 0.0926 × 500 46.30 cu ft
Monthly Storage (Jan) 46.30 × $0.78 $36.11
Period Cost (90 days) $36.11 × 3 months $108.33
Long-Term Surcharge Under 180 days $0.00
Total Storage Cost $108.33

If those units sat through October–December instead, the same inventory would cost $333.36 — three times more. That's a $225 difference from timing alone.

Standard Size vs Oversize: What's the Difference for FBA?

Amazon classifies your inventory into size tiers based on the largest side, median side, and weight of your packaged product:

  • Standard Size: ≤ 18" × 14" × 8" AND ≤ 20 lbs. Lower cubic footage = lower fees per unit, but higher per-pound rate.
  • Oversize: Anything larger or heavier than standard. Lower per-cubic-foot rate ($0.56) but may carry additional handling fees.

Optimize your packaging dimensions to reduce cubic footage. Every inch you shave off packaging translates directly to lower storage costs.

How to Reduce FBA Storage Fees

  1. Clear slow inventory before day 180: Schedule removal orders or use Amazon's liquidation option before the 15th of each month to avoid long-term surcharges.
  2. Optimize packaging dimensions: Reducing dimensional weight lowers your cubic footage, which directly reduces fees.
  3. Avoid overstocking in Q4: Stock conservatively in October–December. The 3× storage rate means the same inventory costs triple. Forecast accurately.
  4. Use FBA age reports: Download the FBA inventory age report monthly to identify items approaching 180 days.
  5. Consider FBM for slow-movers: If a product sells 1–2 units per month, the storage cost per sale may exceed your margin. Switch to self-fulfillment for these ASINs.
  6. Create product bundles: Combining slow sellers with popular items increases sell-through rate and reduces per-unit storage cost.

How Do FBA Storage Fees Compare to FBM?

If you're on the fence between FBA and FBM (Fulfillment by Merchant), storage fees are a key differentiator:

Factor FBA FBM (Self-Storage)
Storage Cost $0.56–$2.40/cu ft/mo Varies ($0.30–$2.00/sq ft/mo typical)
Long-term Surcharge $6.90–$15.60/cu ft None (you control)
Peak Season Premium 3× rate Oct–Dec Depends on your warehouse

Use our FBA vs FBM Calculator to compare total costs including fulfillment fees, storage, and shipping.

Frequently Asked Questions

When does Amazon charge peak season storage fees?
Peak season runs from October 1 through December 31. Storage rates triple during this period — from $0.78 to $2.40 per cubic foot for standard size items. This is one of the biggest cost surprises for new FBA sellers.
How do I avoid long-term storage fees?
Amazon evaluates inventory age on the 15th of each month. To avoid the 180-day surcharge, either sell through or remove the inventory before the 15th of the month when items reach 179 days. Set calendar reminders and check your FBA age report regularly.
Are FBA storage fees tax-deductible?
Yes. FBA storage fees are a business expense and are typically tax-deductible as part of your cost of goods sold (COGS) or operating expenses. Consult a tax professional for your specific situation.
Does Amazon charge storage fees for units in transit?
No. Amazon only charges storage fees for units physically held in their fulfillment centers. Units in transit to Amazon or being processed (receiving, labeling) are not yet billable. However, once received and checked in, the clock starts on your storage age.

Calculate Your FBA Storage Fees Instantly

Enter your product dimensions and inventory volume to get an accurate estimate.

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