Amazon US vs UK FBA Fee Comparison (2026)

Compare Amazon FBA economics across the US and UK markets, including referral fee behavior, fulfillment costs, and storage sensitivity.

Last reviewed: 2026-03-22

Key Takeaways

Referral fee percentage can look similar by category, but fulfillment and storage economics differ by size, weight, and seasonal factors.
US market often benefits from larger demand depth, while UK can be attractive for compact, high-margin SKUs.
Storage seasonality can materially change Q4 profitability in both markets.

Metric	Amazon US	Amazon UK	Profit Impact
Referral Fee Behavior	Category-specific rates with minimums in selected categories.	Category-specific rates with local fee schedules and minimums.	Category selection remains first-order lever in both markets.
FBA Fulfillment	Fee tiers tied to size and shipping weight in US units.	Fee tiers tied to size/weight in metric/localized structures.	Unit conversion and packaging strategy matter when expanding.
Storage Cost Sensitivity	Seasonal surges can erode low-velocity SKU margin in peak months.	Seasonality still important, with local storage policies impacting long-tail inventory.	Keep separate forecast for peak and non-peak periods.
Best-fit SKU Profile	Higher velocity SKUs that can absorb fulfillment costs.	Compact SKUs with predictable replenishment and strong margin.	Same SKU can have very different ROI across regions.

Is US always better because of demand volume?+

Not always. Higher volume can be offset by fee mix and logistics costs. Evaluate net margin and cash cycle together.

Can one calculator model both markets?+

Use market-specific calculators to avoid unit, fee schedule, and policy mismatch.

What should I monitor monthly?+

Referral fee policy updates, FBA fulfillment tier changes, and storage pricing windows.

Validate this comparison with your own product price and cost data.