Amazon FBA Storage Fee Calculator UK 2026
Calculate Amazon UK FBA monthly storage fees, aged inventory surcharges, 455+ day long-term storage costs and storage utilisation surcharge instantly. This free FBA storage fee calculator is updated for the April 2026 UK rate card and is built for Amazon sellers who need to protect margin before slow-moving stock becomes expensive.
FBA Storage Fee Calculators
Choose a calculator below. Results update instantly as you type. Use your Seller Central Inventory Age, Manage Inventory and Fee Preview reports for the final source-of-truth figures.
Enter Your Inventory Details
Storage Cost Breakdown
Inventory Cover Health
Aged Inventory Details
Aged surcharge applies to inventory stored for more than 241 days.
For 365+ brackets Amazon charges the greater of a cubic-foot fee or a per-unit minimum. This calculator applies the greater-of rule automatically.
Or calculate volume from dimensions:
Aged Inventory Surcharge
| Age Bracket | Rate | Surcharge |
|---|---|---|
| 241–270 days | £1.18/ft³ | £0.00 |
| 271–300 days | £3.14/ft³ | £0.00 |
| 301–330 days | £3.26/ft³ | £0.00 |
| 331–365 days | £3.41/ft³ | £0.00 |
| 365–455 days | Greater of £5.71/ft³ or £0.20/unit | £0.00 |
| 455+ days | Greater of £6.14/ft³ or £0.25/unit | £0.00 |
| Total Monthly Aged Surcharge | £0.00 | |
Storage Utilisation Details
For Professional sellers with high inventory cover
The storage utilisation surcharge may apply when your storage utilisation ratio is above 22 weeks. New sellers, Individual accounts and sellers below the daily volume threshold may be exempt.
Utilisation Surcharge Result
| Ratio | Standard | Oversize |
|---|---|---|
| ≤ 22 weeks | £0.00 | £0.00 |
| 22–28 weeks | £0.42 | £0.12 |
| 28–36 weeks | £0.78 | £0.25 |
| 36–44 weeks | £1.04 | £0.45 |
| 44–52 weeks | £1.41 | £0.62 |
| > 52 weeks | £2.29 | £0.81 |
Amazon FBA Storage Fees UK 2026: Complete Rate Guide
Amazon FBA storage fees UK are charged to sellers who store inventory in Amazon fulfilment centres. In 2026, the key costs to monitor are the base monthly storage fee, the FBA aged inventory surcharge, and the storage utilisation surcharge. These costs are not fulfilment fees for individual orders; they are inventory holding costs that can erode profit even when a product is not selling.
This calculator is designed for UK Amazon sellers, ecommerce accountants and marketplace operators who want to forecast the true cost of holding FBA stock before sending inventory into Amazon. It uses cubic feet because UK FBA storage fees are billed on a cubic-foot basis. For your final bill, always compare the estimate with Amazon Seller Central reports, because Amazon uses its own measured dimensions and daily average inventory volume.
2026 Rate Card Update
Amazon's Europe FBA rate card effective 17 April 2026 keeps UK storage fees measured in cubic feet, updates Q4 rates, confirms aged inventory surcharge from 241+ days, and introduces a 455+ day bracket where the charge is the greater of a cubic-foot amount or a per-unit minimum. If your old spreadsheet still uses £1.37/ft³ for Q4 standard-size storage, update it to the 2026 standard-size rate of £1.51/ft³.
Monthly FBA Storage Fee Rates UK 2026
Monthly FBA storage fees are charged for all units stored in an Amazon fulfilment centre based on the calendar month and the daily average volume your inventory occupies. The fee rate depends on product type, dangerous goods classification, size tier and time of year. October, November and December are the peak months, so Q4 stock planning has a direct impact on net margin.
| Product Type | Size Tier | Jan–Sep Rate | Oct–Dec Rate | Best Accounting Note |
|---|---|---|---|---|
| Clothing, accessories, eyewear, footwear, rucksacks & handbags | Standard-size, non-dangerous goods | £0.62/ft³/month | £0.82/ft³/month | Track separately if apparel margins are reviewed by category. |
| All other categories | Standard-size, non-dangerous goods | £0.76/ft³/month | £1.51/ft³/month | Most standard UK FBA products use this rate. |
| Oversize products | Oversize, non-dangerous goods | £0.55/ft³/month | £0.87/ft³/month | Even a lower rate can produce high fees because volume is larger. |
| Dangerous goods / hazmat | Standard-size | £0.74/ft³/month | £1.30/ft³/month | Confirm Amazon hazmat classification before forecasting. |
| Dangerous goods / hazmat | Oversize | £0.70/ft³/month | £1.11/ft³/month | High-volume hazmat stock needs a dedicated fee review. |
How Amazon Measures FBA Storage Volume
Amazon calculates FBA storage volume using the unit dimensions of each product when properly packaged and ready to ship. Storage is charged on the daily average volume stored during the month, not simply the number of units left at month end. That is why a large shipment received early in the month can create a higher storage charge even if some units sell before month end.
Aged Inventory Surcharge UK 2026
The Amazon aged inventory surcharge is a long-term storage cost charged in addition to your base monthly storage fee. It is designed to discourage sellers from using FBA as a slow-moving warehouse. In 2026, UK aged inventory surcharge starts at the 241–270 day bracket and becomes significantly more expensive once units pass 365 days.
| Inventory Age | UK 2026 Aged Surcharge | Combined With Standard Off-Peak Storage | Action Point |
|---|---|---|---|
| 0–240 days | £0.00 | £0.76/ft³ if standard non-dangerous | Healthy if sell-through is strong. |
| 241–270 days | £1.18/ft³/month | £1.94/ft³/month | Discount, advertise or prepare removal plan. |
| 271–300 days | £3.14/ft³/month | £3.90/ft³/month | Urgent margin review required. |
| 301–330 days | £3.26/ft³/month | £4.02/ft³/month | Compare removal vs storage immediately. |
| 331–365 days | £3.41/ft³/month | £4.17/ft³/month | Only keep if sell-through is imminent. |
| 365–455 days | Greater of £5.71/ft³/month or £0.20/unit | At least £6.47/ft³/month for standard stock | Usually remove, liquidate or aggressively clear. |
| 455+ days | Greater of £6.14/ft³/month or £0.25/unit | At least £6.90/ft³/month for standard stock | Treat as margin-critical aged stock. |
The Real Cost of 365+ Day FBA Inventory
Once a standard product passes 365 days, you may pay the base monthly storage fee plus the aged inventory surcharge every month. For a product occupying 1 ft³, the standard off-peak combined cost is at least £6.47 per month in the 365–455 day bracket, before referral fees, fulfilment fees, returns, advertising and cost of goods. For low-priced SKUs, holding old FBA stock can cost more than the expected remaining profit.
Storage Utilisation Surcharge Explained
The storage utilisation surcharge is separate from the aged inventory surcharge. It can apply when the ratio between stored inventory volume and shipped volume is too high. In plain English, Amazon is asking: are you storing much more inventory than you are shipping? If yes, and your ratio exceeds the 22-week threshold, additional charges may apply.
The ratio is calculated using average daily inventory volume stored divided by average daily shipped volume over the trailing 13 weeks. It is calculated by size tier and may differ for standard-size and oversize inventory. The surcharge does not normally apply to Individual selling accounts, new sellers in the defined new-seller period, or sellers below the daily volume threshold.
| Storage Utilisation Ratio | Standard-Size Surcharge | Oversize Surcharge | Meaning for Sellers |
|---|---|---|---|
| ≤ 22 weeks | £0.00/ft³ | £0.00/ft³ | Generally healthy utilisation. |
| 22 < ratio ≤ 28 | £0.42/ft³ | £0.12/ft³ | Early warning: improve sell-through. |
| 28 < ratio ≤ 36 | £0.78/ft³ | £0.25/ft³ | Review replenishment quantities. |
| 36 < ratio ≤ 44 | £1.04/ft³ | £0.45/ft³ | High stock cover is hurting margin. |
| 44 < ratio ≤ 52 | £1.41/ft³ | £0.62/ft³ | Push sales or pull inventory. |
| > 52 weeks | £2.29/ft³ | £0.81/ft³ | Very high inventory cover; urgent action needed. |
Worked Example: FBA Storage Fee Calculation
Assume you sell a standard-size non-dangerous product in the UK. Each unit is 20cm × 15cm × 10cm and you store 500 units at FBA. The unit volume is approximately 0.106 ft³, so total stored volume is about 53 ft³.
- Jan–Sep monthly storage: 53 ft³ × £0.76 = around £40.28 per month
- Oct–Dec monthly storage: 53 ft³ × £1.51 = around £80.03 per month
- Annual base storage estimate: 9 off-peak months plus 3 peak months = around £602.61 before aged or utilisation surcharges
- If 150 units hit 271–300 days: aged surcharge becomes 150 × 0.106 ft³ × £3.14 = around £49.93 extra for that month
This is why the ecommerce profit calculator and this FBA storage fee calculator should be used together. A product can look profitable before storage, aged inventory, returns and advertising are added. For full books, your Amazon FBA bookkeeping should reconcile storage fees as part of marketplace cost of sales, not as a vague overhead.
How to Reduce Amazon FBA Storage Fees in 2026
1. Keep FBA Cover Below 90 Days Where Possible
- Use 60–90 days of cover as a practical target for most stable SKUs.
- Send smaller, more frequent shipments when supplier lead times and inbound placement costs allow.
- Review seasonal products earlier than usual so they do not age into Q4 or January with weak sell-through.
- Separate fast-moving replenishment SKUs from slow-moving test SKUs in your purchase planning.
2. Monitor the 180-Day Warning Zone
- Pull the Inventory Age report monthly and filter units approaching 180 days.
- Create a weekly action list for SKUs likely to pass 241 days before the next aged surcharge assessment.
- Use coupons, Sponsored Products, pricing tests or outlet-style promotions before the 241-day bracket starts.
- Do not wait until 365+ days; by then the surcharge becomes materially harder to justify.
3. Compare Removal, Disposal and Liquidation
- Removal orders let you bring inventory back and resell it on Shopify, eBay, TikTok Shop, wholesale or clearance channels.
- Disposal removes stock without recovery value, but it may still be cheaper than months of aged storage on obsolete goods.
- Liquidation may recover a small percentage of product value while clearing Amazon fulfilment centre space.
- Use this calculator to compare one month of aged storage against the expected removal cost per unit.
4. Improve Product Packaging and Cubic Foot Efficiency
- Reduce wasted air in packaging and outer cartons where product safety allows.
- Request a dimension review if Amazon's measured dimensions look materially higher than your packaged unit.
- Model storage costs before changing bundle quantities, carton configuration or packaging type.
- For bulky products, check whether FBM, 3PL storage or multi-channel ecommerce accounting gives better margin visibility.
Accounting for FBA Storage Fees
From an accounting perspective, Amazon FBA storage fees are not the same as product cost, but they are directly linked to marketplace profitability. A good Amazon FBA bookkeeping setup should separate storage fees, aged inventory surcharges, fulfilment fees, referral fees, advertising and refunds so you can see why net profit changed each month.
- Post Amazon storage fees separately. Use a dedicated expense account such as “Amazon FBA Storage Fees” rather than grouping them with general marketplace fees.
- Track aged surcharges as a separate line. This lets you identify slow-moving stock and hold purchasing decisions accountable.
- Reconcile fees to Amazon settlements. Tools such as A2X or Link My Books can help split Amazon settlement transactions into useful accounting categories.
- Review storage cost by SKU. High-storage SKUs may need a different reorder point, bundle strategy, clearance plan or fulfilment method.
SEO & Operations Tip
Do not treat this page as only a calculator. It should support internal links from your Amazon FBA VAT guide, Amazon bookkeeping service page, ecommerce profit calculator and marketplace accounting hub. Natural internal linking helps users move from cost calculation to compliance, bookkeeping and profitability decisions.
Monthly FBA Storage Review Checklist
- Download the Inventory Age report from Seller Central and identify units approaching 180, 241, 271, 365 and 455 days.
- Check monthly storage fees against expected cubic-foot volume and current category classification.
- Review the storage utilisation report for standard-size and oversize stock separately.
- Compare actual Amazon settlement fees against your forecast in Xero or QuickBooks.
- Calculate storage cost per unit sold for each top SKU.
- Make a decision on slow-moving stock before the next surcharge month: discount, advertise, remove, liquidate or discontinue.
- Update reorder points for any SKU with more than 4 months of FBA cover.
- Record aged inventory surcharges separately in your management accounts.
Is FBA Storage Eating Your Margins? Let's Fix That.
Our specialist ecommerce accountants review your FBA settlements, storage costs, aged inventory fees and SKU-level profitability to identify where you're overpaying — and build a practical plan to improve margin.
Frequently Asked Questions
Amazon FBA storage fee questions answered for UK sellers in 2026.
Amazon UK FBA storage fees are calculated by multiplying the daily average volume of your inventory by the relevant monthly storage rate. UK FBA storage is measured in cubic feet. Volume depends on the unit's packaged dimensions as measured by Amazon, and rates differ by product type, size tier, dangerous goods status and season. October to December is more expensive than January to September.
For standard-size non-dangerous products in all other categories, the 2026 UK rate is £0.76 per cubic foot per month from January to September and £1.51 per cubic foot per month from October to December. Clothing, accessories, eyewear, footwear, rucksacks and handbags have a lower standard-size rate of £0.62 off-peak and £0.82 peak.
In the UK 2026 rate card, aged inventory surcharge starts at the 241–270 day bracket for many items and increases as inventory gets older. Rates are £1.18/ft³ for 241–270 days, £3.14/ft³ for 271–300 days, £3.26/ft³ for 301–330 days and £3.41/ft³ for 331–365 days. For 365–455 days and 455+ days, Amazon applies a greater-of rule using cubic-foot and per-unit minimum charges.
For UK inventory aged 365–455 days, the aged inventory surcharge is the greater of £5.71 per cubic foot per month or £0.20 per unit. For inventory aged 455+ days, the aged inventory surcharge is the greater of £6.14 per cubic foot per month or £0.25 per unit. These charges are in addition to the base monthly storage fee.
The storage utilisation surcharge is an extra charge for sellers with a high ratio of stored inventory volume to shipped volume. The UK 2026 threshold begins above a 22-week storage utilisation ratio. The surcharge is calculated separately for standard-size and oversize inventory and can range from £0.42 to £2.29/ft³ for standard-size inventory, depending on how high the ratio is.
For slow-moving SKUs, removal is often cheaper than paying aged inventory surcharges for multiple months. The decision depends on unit volume, age bracket, expected sell-through, removal cost, resale value and whether the product can be sold through another channel. Use the aged inventory calculator above to estimate one month of surcharge, then compare it with removal, disposal or liquidation options in Seller Central.
Yes. Storage fees should be included in product profitability analysis because they are directly linked to the inventory you choose to hold. At minimum, review storage cost per unit sold and aged inventory surcharge by SKU each month. For accurate accounts, separate storage, aged surcharge, fulfilment, referral, advertising and refund costs in Xero or QuickBooks.