How it's calculated
- Your own store = price + shipping charged − unit cost × units − pick and pack − extra picks − packaging − label − card fees − refund reserve
- Amazon FBA = price − unit cost × units − referral fee − FBA fulfilment fee − freight to the warehouse − refund reserve. The fulfilment fee is the one Amazon prints for the bundle's size tier, weight and price, plus its 3.5% surcharge
- Amazon FBM = price − unit cost × units − referral fee − your own pick and pack, extra picks, packaging and label − refund reserve
- TikTok Shop, Fulfilled by TikTok = price − unit cost × units − referral fee − the fee TikTok Shop prints for a one-unit order of that weight − freight to the warehouse − refund reserve
Every figure on this page comes from Offer Suite's own margin engine, the same code the product uses to forecast each offer's and option's profit and to compute realized margin on orders. Money is computed in whole cents.
Worked example
A coffee brand sells 2 bags as a bundle at $72.00, packed at 1 lb 11 oz. In its own store the bundle costs $24.00 in product, $10.50 for the label and $2.09 plus $0.30 in card fees; after the pick, the box and a refund reserve the order keeps $29.63.
On Amazon the referral fee at 15% is $10.80. With FBA the bundle is one large standard unit, priced as 1.75 lb: $5.83 plus a $0.20 surcharge. With $0.60 of freight to the warehouse the order keeps $26.97, and $26.63 at the holiday peak rates. Shipped by the brand itself (FBM), it pays the same referral fee and its own parcel, and keeps $21.22.
On TikTok Shop the referral fee at 6% is $4.32 and Fulfilled by TikTok charges $5.71 for a one-unit order of this weight, so the order keeps $33.77 before any creator commission, which comes out of that.
Assumptions
- Amazon's referral fees are the table on its pricing page, and its FBA fulfilment fees are the standard-size rates for products that are not apparel or dangerous goods, both read 13 October 2026. The non-peak rates run 15 January 2026 to 14 October 2026 and the holiday peak rates 15 October 2026 to 14 January 2027; the result shows both.
- Amazon adds a 3.5% fuel and logistics surcharge to every FBA fulfilment fee since 17 April 2026. It is counted here on the fee, rounded to the cent.
- TikTok Shop's referral fee is the rate its category chart gives 189 of 206 categories, and its fulfilment fee is the Fulfilled by TikTok rate card in effect since 13 July 2026 for an order of one unit, both read 13 October 2026.
- The bundle reaches a marketplace's warehouse packed as one unit, so it pays one fulfilment fee. Units a warehouse picks separately each pay their own.
- The weight is the bundle's packed weight. Amazon prices a large standard unit on its dimensional weight (length × width × height ÷ 139) when that is heavier, and TikTok Shop does the same above 2 lb (÷ 166): enter the heavier one. A bundle over 20 lb or past the large standard size is not priced here.
- A marketplace order ships free to the buyer and pays no card fee: the referral fee covers payment. On Amazon FBM you ship the parcel yourself at your own costs.
- Storage, returns handling, a selling plan's monthly fee, ads, coupons and creator commissions are not counted. On TikTok Shop a creator's commission is often the largest cost of a sale; take it off what the order keeps.
- Freight to the warehouse ($0.60 a bundle) is an assumption. Your freight bill divided by the units on it gives yours.
- The refund reserve is the same share of revenue on every channel. Marketplace return rates often differ from a store's; enter the one you see.
- Pick and pack $1.18 per order and $0.20 for each extra item are the defaults of the engine's DTC-US profile, a typical third-party warehouse contract. Use your own contract.
- Card processing of 2.9% + $0.30 is Shopify Payments' online rate for a standard card on the Basic plan in the United States. The Shopify Payments fees pages list every plan and country; enter yours.
- The label ($10.50) is USPS Ground Advantage's commercial price for a parcel of this weight to zone 5. The shipping calculator has every zone.
Questions
How much does Amazon FBA charge per unit?
Two fees on each sale. The referral fee is a percentage of the price by category: 15% in most, 8% in some, with a $0.30 minimum in most. The fulfilment fee depends on the unit's size tier, shipping weight and price: a large standard unit over 1.5 lb and up to 1.75 lb priced above $50 is $5.83 at the non-peak rates and $6.15 at the holiday peak rates, before the 3.5% surcharge.
What does TikTok Shop charge sellers in the United States?
A referral fee of 6% of what the customer pays in most categories, on TikTok Shop's chart as read 13 October 2026. With Fulfilled by TikTok there is also a fulfilment fee per unit by weight: $5.71 for a one-unit order over 1 lb and up to 2 lb. Creator commissions and ads come on top and are yours to set.
Is Amazon FBA or FBM cheaper?
It depends on your own parcel. FBM pays the same referral fee and replaces Amazon's fulfilment fee with your pick, box and label. With the defaults on this page the FBA fee is $6.03 and shipping the bundle yourself costs $12.38, so FBA keeps $5.75 more of the same sale. A light product you can ship cheaply can come out the other way.
Why does the same bundle keep more in one channel than another?
Each channel swaps one set of costs for another. Your own store pays a card fee of about 3% and a parcel; Amazon charges 15% in most categories before fulfilment; TikTok Shop's referral fee is lower. With the defaults here a $72.00 bundle keeps $29.63 in your own store, $26.97 on Amazon FBA and $33.77 on TikTok Shop before any creator commission. What a channel costs to win the sale, in ads or commissions, comes out of that.