Amazon FBA vs Dropshipping: Repricing and Minimum Prices

Amazon sellers choose their fulfilment model before they choose a repricer. The choice matters. FBA and FBM dropshipping have different cost structures, different positions in the Buy Box algorithm, and require different minimum price formulas.

Most comparisons of FBA and dropshipping stop at the cost and logistics level. This one goes further. It covers how repricing strategy differs between the two models, why FBM dropshipping sellers need to build supplier shipping cost into the minimum price formula rather than replicate the FBA floor formula, and what that means for Buy Box ceiling calibration.

Note on scope: this article covers both fulfilment models in full and adds the repricing and minimum price angle that distinguishes them at the operational level. For the general floor price formula for FBA single-item ASINs, see how to calculate your Amazon FBA minimum price

TL;DR: FBA sellers include the FBA fulfilment fee in their minimum price formula. FBM dropshipping sellers include supplier shipping cost instead. The two figures are not interchangeable. In the Buy Box algorithm, FBA offers receive a weighting advantage over FBM offers at the same price point. FBM/dropshipping sellers typically need to price below FBA competitors to achieve equivalent Buy Box share, which affects where both the floor and the ceiling are set.

What Amazon FBA is and how it works

With Fulfillment by Amazon (FBA), the seller ships inventory to Amazon's fulfilment centres before any sale occurs. Amazon then picks, packs, and ships each order to the customer. The seller pays Amazon a fulfilment fee per unit shipped.

FBA sellers carry inventory in advance: they purchase or manufacture products, ship them into Amazon's network, and hold that stock at Amazon's fulfilment centres until customers order. The seller's cost exposure is at the front: upfront product cost, inbound shipping to Amazon, and storage fees for unsold stock.

The per-unit cost structure for an FBA listing:

Product cost (COGS): the unit cost from the supplier or manufacturer
Inbound shipping to Amazon: freight or parcel cost to deliver stock to Amazon's fulfilment centre, allocated per unit
FBA fulfilment fee: Amazon's per-unit fee for picking, packing, and outbound delivery to the customer, based on the product's packaged weight and size tier
Amazon referral fee: a percentage of the sale price, charged on each completed sale, based on the product's category
Storage fees: a monthly charge per cubic foot for stock held in Amazon's fulfilment centres. Long-term storage fees apply to units held 365 or more days.

FBA listings are eligible for Amazon Prime, which signals fast, tracked delivery to buyers. Prime eligibility is a direct Buy Box factor: Amazon's algorithm weights FBA offers more favourably than FBM offers at equivalent prices, because FBA orders are fulfilled through Amazon's own network with guaranteed delivery timelines. The fuller set of trade-offs, including the branding and control costs FBA carries alongside these advantages, is covered in is Amazon FBA right for your business.

FBA sellers do not manage the outbound shipping process. Amazon handles it. For repricing purposes, this means that when the repricer changes the listing price, there is no fulfilment-side complexity to account for. The stock is already at Amazon. The fulfilment fee is fixed by product dimensions. The only variable is the sale price.

What Amazon dropshipping is and how it works

With Amazon dropshipping, the seller lists products without holding any inventory. When a customer places an order, the seller instructs a third-party supplier to ship the item directly to that customer. The seller never handles the product.

Dropshipping sellers pay the supplier per order, only after a customer sale is confirmed. There is no upfront inventory purchase and no warehousing cost. The commercial risk shifts from inventory write-off to margin per transaction: the seller must ensure that what the customer pays covers the product cost, the supplier's shipping charge, and Amazon's fees, with a positive margin remaining.

The per-unit cost structure for an FBM dropshipping listing:

Product cost per unit: what the seller pays the supplier for each unit ordered on the customer's behalf
Supplier shipping cost to customer: what the supplier charges to despatch the item to the buyer's delivery address. This is the outbound fulfilment cost and it replaces the FBA fee.
Amazon referral fee: a percentage of the sale price, charged on each completed sale
No FBA fee: the order is not fulfilled through Amazon's network, so no Amazon fulfilment fee applies

Dropshipping on Amazon is governed by Amazon's dropshipping policy. The seller must be the identified seller of record on all documentation. The supplier's name must not appear on packaging, invoices, or packing slips visible to the customer. Dropshipping from another Amazon listing is prohibited. The full compliance requirements are covered in Amazon dropshipping: is it worth it.

FBM dropshipping listings are not automatically Prime-eligible. A small number of FBM sellers qualify for Seller-Fulfilled Prime by meeting Amazon's strict dispatch speed and tracking requirements, but standard FBM dropshipping does not qualify. This has a direct effect on Buy Box performance, which is covered in the section below.

How the minimum price formula differs between FBA and dropshipping

The minimum price formula has the same structure for both models: total fulfilment costs divided by the net margin factor. The inputs are different. FBA sellers include the FBA fulfilment fee. Dropshipping sellers include supplier shipping cost to the customer. Using the wrong inputs for the wrong model produces a floor that does not reflect actual costs.

The FBA minimum price formula:

(Landed cost + FBA fulfilment fee) ÷ (1 - referral fee rate - target margin rate)

Where:

Landed cost = product cost per unit + inbound shipping per unit to Amazon's fulfilment centre
FBA fulfilment fee = Amazon's per-unit fee for picking, packing, and outbound delivery to the customer

Worked example using $ amounts:

Product cost: $6.00
Inbound shipping allocation: $1.50 per unit
Landed cost: $7.50
FBA fulfilment fee: $3.20 (Large Standard)
Referral fee rate: 15%
Target margin: 20%
FBA floor: ($7.50 + $3.20) ÷ (1 - 0.15 - 0.20) = $10.70 ÷ 0.65 = $16.46

The FBM dropshipping minimum price formula:

(Product cost + supplier shipping cost to customer) ÷ (1 - referral fee rate - target margin rate)

Where:

Product cost = what the seller pays the supplier per unit (no inbound shipping because the seller holds no inventory)
Supplier shipping cost = what the supplier charges to despatch the order to the buyer's delivery address

Worked example using the same product:

Product cost: $6.00 (same product, same supplier)
Supplier shipping cost to a US address: $4.80
Referral fee rate: 15%
Target margin: 20%
Dropshipping floor: ($6.00 + $4.80) ÷ (1 - 0.15 - 0.20) = $10.80 ÷ 0.65 = $16.62

What the comparison shows: the dropshipping floor (16.62)isslightlyhigherthantheFBAfloor(16.46) on this product. The supplier shipping cost (4.80)exceedstheFBAfee(3.20). The dropshipping model costs more per unit to fulfil on this example. The dropshipping seller saved the inbound shipping cost ($1.50 per unit) compared to FBA, but paid a higher per-order outbound cost via the supplier.

A seller who uses the FBA-style formula for a dropshipping account, but leaves out the supplier shipping cost input entirely, will set their floor $4.80 below actual cost per unit. Every sale below the correct floor destroys margin.

The variable shipping problem specific to FBM dropshipping: FBA fees are fixed. Amazon publishes an annual fee schedule based on product weight and dimensions, and every FBA seller pays the same fee for the same product characteristics. Supplier shipping costs are variable: they depend on the customer's delivery location, the supplier's carrier arrangement, and carrier rate changes over time.

FBM dropshipping sellers face two approaches to managing this variability:

Use a worst-case supplier shipping cost as the floor input. Set the floor using the highest shipping charge the supplier applies (typically for the most distant or most expensive delivery zone). This protects margin in the worst-case scenario but sets the floor conservatively, which affects Buy Box competitiveness in lower-cost delivery zones.
Negotiate flat-rate shipping with the supplier. A fixed per-unit shipping charge regardless of the customer's location converts a variable input into a fixed one, making the floor calculation straightforward. This is the recommended approach for FBM dropshipping sellers who reprice across a large number of ASINs.

Buy Box competition: how fulfilment model affects pricing power

Amazon's Buy Box algorithm gives FBA offers a structural weighting advantage over FBM offers at the same listed price. An FBM/dropshipping seller and an FBA seller both listed at $20.00 are not in equivalent competitive positions in the Buy Box rotation. The FBA seller will win more Buy Box time.

The weighting exists because delivery speed and reliability are Buy Box factors. FBA orders are Prime-eligible, fulfilled from Amazon's own network with guaranteed delivery windows. FBM orders depend on the merchant's dispatch performance and carrier. Amazon applies a structural advantage to FBA offers because they signal a higher-quality delivery experience to the buyer. This weighting is broken down in more detail in FBA vs FBM repricing strategy: an FBM seller priced identically to an FBA competitor still receives less Buy Box rotation, because fulfilment method enters the algorithm as a quality signal independent of price.

Practical consequence for FBM dropshipping repricing: an FBM/dropshipping seller who sets a ceiling at the same level the Buy Box price history suggests will see the repricer priced at the top of the band but earning limited Buy Box time. The price history on most ASINs reflects FBA-dominated Buy Box wins. An FBM/dropshipping seller at the same price as that historical high is not in the same competitive position as the FBA seller who held it.

Two adjustments for FBM dropshipping sellers when setting ceilings:

Apply a larger re-entry discount when deriving the ceiling from price history. The standard 5 to 10% discount applied by FBA sellers should be increased to 10 to 15% for FBM dropshipping, to account for the Buy Box weighting disadvantage versus the FBA sellers whose prices dominate the historical data.
Monitor Buy Box share against ceiling price. If the repricer consistently sits at or near the ceiling but earns low Buy Box share, the ceiling is set too high for an FBM listing on that ASIN. Move the ceiling down until Buy Box share improves at a price that still returns the target margin.

Three repricing strategy differences between FBA and dropshipping

Fulfilment model affects repricing in three areas beyond the floor formula: the ceiling calibration, the response to competitor price changes, and the stock dependency. All three require different settings or review processes for FBM dropshipping versus FBA.

Floor price inputs. The FBA floor uses landed cost (product cost + inbound shipping) plus the FBA fulfilment fee. The FBM dropshipping floor uses product cost plus supplier shipping cost to the customer. Applying the FBA formula to a dropshipping account, or using a dropshipping calculation for an FBA listing, produces a floor that misrepresents actual costs. Sellers who run both models on the same account need separate floor calculations per ASIN.
Ceiling calibration. Price history on most ASINs reflects FBA Buy Box wins. An FBM/dropshipping seller who sets the ceiling at the FBA-derived price is effectively matching a competitor who has a Buy Box weighting advantage. The FBM dropshipping ceiling should be set 10 to 15% below the sustained historical high on the ASIN, rather than the 5 to 10% applied by FBA sellers, to account for that structural gap in Buy Box competitiveness.
Stock-availability dependency. FBA sellers have inventory at Amazon's fulfilment centres. The repricer responds to price changes in real time and the stock is available to fulfil orders as they arrive. FBM dropshipping sellers depend entirely on supplier stock availability. A repricer winning the Buy Box on a dropshipping listing while the supplier is out of stock generates orders the seller cannot fulfil. Unfulfilled orders trigger late-dispatch defects and performance warnings that affect account health metrics and search visibility. Supplier stock monitoring must run alongside repricing for every active dropshipping listing.

Setting up repricing for FBA and dropshipping in Repricer.com

Repricer.com supports both FBA and FBM repricing, including rules that respond specifically to whether a competitor is Prime, FBA, FBM, or seller-fulfilled. The minimum price entered for each ASIN is the floor the repricer holds regardless of competitive pressure. The formula used to calculate that floor must match the fulfilment model: FBA formula for FBA listings, dropshipping formula for FBM listings. The wider set of tactics FBM sellers use alongside floor and ceiling configuration, including shipping template optimisation and performance-metric management, is covered in repricing strategies for Amazon FBM sellers.

Configuration for FBA listings:

Calculate the floor for each FBA ASIN: (landed cost + FBA fulfilment fee) ÷ (1 - referral fee rate - target margin rate). Include all inbound shipping cost allocation in the landed cost figure.
Enter the calculated floor as the minimum price for each ASIN in Repricer.com.
Set the ceiling from 90-day Buy Box price history via Keepa or CamelCamelCamel. Apply a 5 to 10% re-entry discount to the sustained high (the highest price held for seven or more consecutive days).
Set a Buy Box targeting strategy within the floor-to-ceiling band.
Review floors at the start of each year when Amazon updates its FBA fee schedule, early in the calendar year (the most recent increase took effect January 15, 2026, per Supply Chain Dive).

Configuration for FBM dropshipping listings:

Calculate the floor for each FBM ASIN: (product cost + supplier shipping cost to customer) ÷ (1 - referral fee rate - target margin rate). Use a flat-rate supplier shipping figure where negotiated, or the worst-case shipping cost for the relevant delivery zones where supplier rates are not flat.
Enter the calculated floor as the minimum price for each ASIN in Repricer.com.
Set the ceiling from 90-day Buy Box price history. Apply a 10 to 15% re-entry discount to the sustained high, to account for the FBM Buy Box weighting disadvantage.
Monitor Buy Box share per ASIN. Where the repricer runs at or near the ceiling but Buy Box share remains low, lower the ceiling until Buy Box share improves at a price that returns the target margin.
Establish a supplier stock feed or manual check process. When supplier stock on any active ASIN drops to zero, suppress or close the listing in Seller Central before the repricer wins Buy Box time on an order that cannot be fulfilled.
Review floors whenever the supplier revises shipping rates and whenever the supplier reprices the product itself.

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Key Takeaways

FBA and FBM dropshipping use different minimum price formulas. FBA: (landed cost + FBA fulfilment fee) ÷ (1 - referral fee - target margin). Dropshipping: (product cost + supplier shipping cost) ÷ (1 - referral fee - target margin). The difference is the outbound fulfilment cost input.
Supplier shipping cost is variable. FBA fees are fixed. FBM dropshipping sellers must account for shipping cost variability in the floor, either by using worst-case shipping or by negotiating flat-rate supplier shipping.
FBA offers receive a Buy Box weighting advantage over FBM at the same price. An FBM/dropshipping seller and an FBA seller priced identically are not equal competitors in the Buy Box algorithm. FBA wins more Buy Box time.
FBM dropshipping ceilings must be set more conservatively than FBA ceilings. Apply a 10 to 15% discount to the sustained Buy Box high for FBM listings, not the 5 to 10% used for FBA accounts.
Dropshipping sellers must manage supplier stock alongside repricing. A repricer winning the Buy Box on a listing where the supplier is out of stock creates unfulfillable orders and risks account health metrics.
Sellers running both FBA and FBM listings on the same account need separate floor calculations per ASIN. The same formula cannot be applied across both models without producing incorrect floors for one or both.

Action Plan

Identify which fulfilment model applies to each active ASIN. FBA and FBM dropshipping listings on the same account need separate floor formulas. Do not apply the FBA floor formula to FBM dropshipping listings.
For FBA listings: calculate the floor as (landed cost + FBA fulfilment fee) ÷ (1 - referral fee rate - target margin rate). Enter the result as the minimum price in Repricer.com for each ASIN.
For FBM dropshipping listings: calculate the floor as (product cost + supplier shipping cost to customer) ÷ (1 - referral fee rate - target margin rate). Use a flat-rate supplier shipping figure where available, or the worst-case delivery zone cost.
Set the ceiling for FBA listings from 90-day Buy Box price history, applying a 5 to 10% re-entry discount to the sustained high.
Set the ceiling for FBM dropshipping listings from the same price history source but apply a 10 to 15% discount to the sustained high, to account for the FBM Buy Box weighting disadvantage.
Monitor Buy Box share per ASIN for FBM listings. If Buy Box time is low despite being near the ceiling, reduce the ceiling until Buy Box share improves at a price that meets the target margin.
Set up supplier stock monitoring for all active dropshipping listings. When supplier stock drops to zero, suppress or close the listing in Seller Central. Do not leave the repricer winning Buy Box time on a listing the supplier cannot currently fulfil.

Frequently Asked Questions

What is the difference between Amazon FBA and dropshipping for repricing? FBA sellers hold inventory in Amazon's fulfilment centres. When a customer orders, Amazon picks, packs, and ships the item. The repricer changes prices and the fulfilment runs automatically from stock that is already in place. Dropshipping sellers hold no inventory. When an order is placed, the seller instructs the supplier to ship directly to the customer. For repricing, the key difference is the minimum price formula: FBA includes the FBA fulfilment fee as a cost input, while FBM dropshipping includes the supplier's per-order shipping charge to the customer instead. Using the wrong formula for the wrong model produces an inaccurate floor.
Why do FBM dropshipping sellers need a different minimum price formula? The minimum price formula is built to cover all fulfilment costs. For FBA, Amazon's fulfilment fee covers the entire outbound delivery cost. For FBM dropshipping, there is no FBA fee, but the supplier charges a shipping fee to send each order to the customer's address. That supplier shipping cost takes the place of the FBA fee in the formula. A dropshipping seller who uses the FBA formula and omits the supplier shipping cost will set the floor below actual cost and sell at a loss on every order placed.
Do FBM dropshipping sellers earn less Buy Box time than FBA sellers at the same price? In most product categories, yes. Amazon's Buy Box algorithm weights FBA offers more favourably because FBA orders are Prime-eligible and fulfilled through Amazon's own logistics network with guaranteed delivery timelines. FBM offers, including dropshipping, are not automatically Prime-eligible and are ranked with a structural weighting disadvantage relative to FBA offers at the same price. To achieve comparable Buy Box share, FBM dropshipping sellers typically need to price below FBA competitors. This affects where the ceiling is set: FBM dropshipping ceilings should be 10 to 15% below the sustained Buy Box historical high, rather than the 5 to 10% used for FBA accounts.
What are the biggest repricing risks for Amazon dropshipping sellers? Three risks are specific to repricing FBM dropshipping listings. First, a floor set without including supplier shipping cost means the seller underprices on every order. Second, a ceiling set at the same level used for FBA accounts will be too high for FBM competitive positioning, resulting in low Buy Box share at the top of the repricing band. Third, a repricer winning the Buy Box on a listing where the supplier is out of stock generates orders the seller cannot fulfil. Unfulfilled orders trigger late-dispatch defects that harm account health metrics and affect listing visibility. All three risks require distinct processes: correct floor formula, conservative ceiling calibration, and active supplier stock monitoring running in parallel with repricing.