Amazon FBA Calculator UK
Master your margins with the definitive Amazon seller fees calculator UK. Accurately model referral fees, FBA fulfilment, storage, and VAT to reveal your true net profit per unit.
Net profit per unit
£9.62
Margin
38.5%
ROI
160.3%
Total Amazon fees
£6.77
Break-even price
£13.68
Pricing
What you pay your supplier
Dimensions & Weight
For FBA fulfilment fee calculation
Additional Costs
Cost to ship to Amazon warehouse
Bagging, poly bags, labels
Storage
VAT & Plan
To amortise monthly fee
Referral Fee
£3.75
15.0%
Fulfilment
£2.44
Large envelope small (151–400g)
Storage
£0.08
2 months
Total FBA Fees
£6.77
27.1%
Total All-in Cost
£15.37
Inc product cost
Break-even Price
£13.68
Target price
Amazon UK seller fees explained
Understanding your true cost to sell on Amazon UK is the single most important skill for any FBA seller. Many sellers — especially those new to the platform — focus on the referral fee percentage and underestimate or ignore the cumulative impact of fulfilment fees, storage fees, inbound shipping, prep costs, and the seller plan fee. An accurate amazon profit calculator UK must account for all of these to give you a number you can actually base purchasing decisions on.
Amazon charges four categories of fees directly: a referral fee on every sale, an FBA fulfilment fee for picking, packing, and shipping each unit, a monthly storage fee for holding your inventory in their warehouses, and a seller plan subscription. On top of this, you have your own costs: the price you paid your supplier, inbound shipping to Amazon's fulfilment centres, labelling and prep, and any advertising spend.
Referral fees: The cost of the customer
The referral fee is Amazon's most visible charge — a percentage of the total selling price (including VAT) taken on every transaction. Rates range from 7% for electronics to 20% for jewellery under £225. Most everyday consumer goods attract a 15% referral fee. Some categories — jewellery, watches, furniture, and grocery — use tiered rates that change depending on the sale price.
| Category | Rate | Notes |
|---|---|---|
| Electronics, Computers, Camera, Mobile Phones | 7% | One of the lowest rates on Amazon UK |
| Video Game Consoles | 7% | |
| Books, Music, DVD, Software, Video Games | 15% | Media category |
| Toys & Games, Baby, Beauty, Health | 15% | Standard consumer goods |
| Clothing, Shoes & Bags | 15% | |
| Kitchen & Home, Garden, Sports | 15% | |
| Pet Supplies, Stationery, Office | 15% | |
| DIY & Tools, Automotive, Industrial | 12% | |
| Musical Instruments | 12% | |
| Furniture & Décor | 15% (≤£100) / 10% (>£100) | Tiered by price |
| Jewellery | 20% (≤£225) / 5% (>£225) | High-value pieces favourable |
| Watches | 15% (≤£225) / 5% (>£225) | Tiered by price |
| Grocery & Gourmet | 8% (≤£10) / 15% (>£10) | Tiered by price |
FBA fulfilment fees 2024
FBA fulfilment fees are charged per unit shipped and are determined by the size and weight of your product. Amazon uses whichever is greater between actual weight and dimensional weight (length × width × height ÷ 5,000) for oversize items. Getting these numbers right matters: a product that weighs 450g but has bulky dimensions may be classified into a higher fee tier than its weight alone would suggest.
| Size tier | Dimensions | Weight | Fee |
|---|---|---|---|
| Small envelope | ≤33×23×2.5cm | ≤80g | £1.86 |
| Standard envelope | ≤33×23×2.5cm | 81–150g | £2.04 |
| Large envelope (small) | ≤33×23×3.2cm | 151–400g | £2.44 |
| Large envelope | ≤33×23×3.2cm | 401–900g | £2.83 |
| Small parcel | ≤45×34×26cm | ≤200g | £2.70 |
| Small parcel | ≤45×34×26cm | 201–500g | £3.00 |
| Small parcel | ≤45×34×26cm | 501g–1kg | £3.31 |
| Small parcel | ≤45×34×26cm | 1–2kg | £3.77–£4.17 |
| Standard parcel | ≤45×34×26cm | 2–5kg | £4.80–£5.87 |
| Standard parcel | ≤45×34×26cm | 5–12kg | £7.12–£10.06 |
| Oversize | ≤61×46×46cm | >12kg | £10.06 + £0.49/kg |
Storage: The Silent Profit Killer
Monthly inventory storage fees are charged based on the volume of space your products occupy, measured in cubic feet. Standard-size rates are £0.50/ft³ from January to September and £1.50/ft³ from October to December. The peak season rate is three times the standard rate — a significant cost if you are carrying slow-moving inventory into Q4.
Products stored for longer than 365 days are subject to long-term storage fees, which can be devastating for margins. Successful FBA sellers treat inventory turnover as a key operational metric, aiming for at least 4-6 turns per year to avoid unnecessary storage overhead.
Calculating Amazon FBA profit correctly
The formula for true FBA profit is:Profit = (Net Sale Price) - (COGS) - (Inbound Shipping) - (Prep) - (Referral Fee) - (Fulfilment Fee) - (Storage) - (Plan Fee)The two numbers that matter most beyond raw profit are Margin (profit as % of net price) and ROI (profit as % of cost of goods). Margin tells you how resilient your pricing is to fee changes, while ROI tells you how efficiently you are deploying capital.
VAT and Amazon UK: The Essential Nuance
If you are VAT registered, you collect 20% VAT from the buyer, but this money is remitted to HMRC — it is not your income. Critically, Amazon calculates its referral fee on the total sale price including VAT. This means Amazon takes a percentage of the tax you collect, effectively increasing your cost of selling.
However, VAT-registered sellers can reclaim the VAT on Amazon's fees. This "Input VAT" reclaim can improve your effective margin compared to non-registered sellers who must treat the VAT on Amazon fees as a pure cost.
Quick Benchmarks
15%
Target Net Margin
Minimum safety threshold for a sustainable FBA business.
100%
Target ROI
Doubling your money on unit cost allows for aggressive scaling.
33
Break-even Units
Sales per month where Professional plan beats Individual.
Pro Tip
"Always weigh and measure your product in its Amazon-readypackaging, not the raw product. Even a 5mm difference in height can push you into a higher fulfilment fee tier and wipe out 10% of your margin."
Frequently asked questions
How are Amazon UK seller fees calculated?
Amazon UK charges three main types of fees: a referral fee (a percentage of the total sale price including VAT, typically 7–20% depending on category), an FBA fulfilment fee (a flat fee based on weight and dimensions, ranging from £1.86 to £10+ per unit), and monthly storage fees (charged per cubic foot based on how long your inventory sits in Amazon's warehouse). There is also either a £0.75 per-item fee (Individual plan) or £25/month (Professional plan). This Amazon seller fees calculator UK shows you all four components in one place.
Does Amazon charge VAT on its fees in the UK?
Yes — Amazon charges 20% VAT on its referral fees and FBA fulfilment fees for UK sellers. If you are VAT registered, you can reclaim this VAT as input tax on your VAT return, so it is not a net cost for VAT-registered businesses. For non-VAT-registered sellers, Amazon's fees are effectively 20% higher than the headline rates suggest. This FBA UK calculator shows fees at face value; VAT-registered sellers should factor in the reclaim.
What is the difference between Individual and Professional seller plans?
The Individual plan charges £0.75 per item sold and has no monthly fee, but restricts access to bulk listing tools, advertising, and some categories. The Professional plan costs £25 per month (inc. VAT) regardless of how many items you sell, but gives full access to all selling tools, sponsored ads, and category approvals. The Professional plan becomes cheaper on a per-unit basis once you sell more than 33 units per month (£25 ÷ £0.75). If you plan to run a serious FBA business, the Professional plan is almost always the right choice.
How do Amazon UK storage fees work?
Amazon charges monthly storage fees based on the cubic volume your inventory occupies in their fulfilment centres. Standard-size products cost £0.50 per cubic foot from January to September, rising to £1.50 per cubic foot from October to December (the peak period ahead of Christmas). For context, a 20×15×8cm product occupies 0.085 cubic feet and costs roughly £0.04/month in standard season. Products that have been in the warehouse for more than 365 days may also incur long-term storage fees — a key reason FBA sellers focus on fast-turning inventory.
What is a good profit margin for Amazon FBA UK?
Most experienced FBA sellers target a minimum net margin of 20–30% after all fees and costs. Below 15% net margin, the business becomes very sensitive to fee increases, PPC cost rises, or supplier price changes. ROI on cost of goods is also important: a 50%+ ROI means you double your money on each unit cycle, which matters for cash flow and restocking. Use this amazon profit calculator UK to model different price points and find the margin that works for your business.
Do Amazon referral fees apply to the full selling price or just the product price?
In the UK, Amazon calculates the referral fee on the total transaction price including VAT. This is an important detail that catches many new sellers off guard — if you sell a product for £24.99 including 20% VAT, Amazon's 15% referral fee is calculated on the full £24.99, not on the ex-VAT price of £20.83. This means Amazon takes a cut of money that technically belongs to HMRC, effectively increasing your net cost of selling.
Can I use this calculator for Merchant Fulfilled (MFN) orders?
The referral fee component applies equally to both FBA and Merchant Fulfilled (MFN) orders — Amazon takes its percentage cut regardless of who ships the item. For MFN, simply enter £0 for the FBA fulfilment fee and storage costs, and add your own fulfilment costs (packaging, postage, labour) into the 'Other costs' field. This gives you an accurate comparison of FBA versus self-fulfilment economics.
How does this FBA UK calculator handle dimensional weight?
Amazon UK uses actual weight to determine FBA fulfilment fees for most product sizes, but applies dimensional weight for large or oversize items. Dimensional weight = (length × width × height in cm) ÷ 5000. If the dimensional weight exceeds the actual weight, Amazon uses the higher figure. Enter your actual product dimensions in the calculator and it will apply the correct fee tier based on both weight and size constraints.
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Disclaimer: This Amazon FBA calculator UK uses fee data sourced from Amazon Seller Central as of 2024/2025. Amazon updates its fee schedules periodically — always verify current fees at sellercentral.amazon.co.uk before making sourcing or pricing decisions. This tool is for informational purposes only and does not constitute financial or business advice. VAT guidance is simplified — consult a UK accountant for advice specific to your business situation.