FBA storage fee calculator.
Estimate what Amazon charges to store your inventory each month, including the higher Q4 peak-season rates.
Get a free audit ↗Rates are Amazon's published 2026 monthly storage rates (approx). Peak Q4 rates are far higher, so keep Q4 inventory lean.
You pay by the cubic foot, per month.
Amazon multiplies the cubic feet your inventory occupies by a monthly rate. That rate jumps sharply in Q4 (October to December) to discourage warehouses filling up before peak.
Volume, not units
A large, light product can cost more to store than a small, heavy one. Measure the packaged dimensions.
Q4 is the trap
Peak-season rates can be roughly 3x the off-season rate, so send in only what you will sell through the quarter.
How are Amazon storage fees calculated?
Cubic feet of inventory multiplied by a monthly per-cubic-foot rate. The rate is higher for oversize items and much higher in Q4.
Why are my Q4 storage fees so high?
Amazon raises monthly storage rates from October to December to keep warehouse space free for fast-moving inventory during peak.
What is the difference between storage and long-term fees?
This tool covers monthly storage. Amazon also charges aged-inventory surcharges on units that sit for many months, so turn inventory over.
Estimates for planning only. Verify current Amazon fees in Seller Central; results depend on your inputs.
Want us to fix what the numbers reveal? Let’s grow your brand.
Get my free audit ↗Book a free 3-day audit. We pull your account live, find your three biggest leaks, and hand you a 90-day plan to keep.