Amazon FBA vs FBM: Which Is More Profitable?
One of the most common questions new Amazon sellers face is whether to use FBA (Fulfillment by Amazon) or FBM (Fulfillment by Merchant). The answer depends on your product category, price point, and sales volume. Below we break down the costs, tradeoffs, and profit implications of each method using real data from our free Amazon FBA profit calculator.
FBA vs FBM at a Glance
Run your product's numbers before you commit
Model referral, FBA/FBM fulfillment, storage, ACoS and returns for the US, DE and JP in one place.
Open the free profit calculator →| Factor | FBA | FBM |
|---|---|---|
| Fulfillment fees | $4.75–$6.40 under 1 lb; $6.85 at 1–2 lb | $3–$6 per unit (shipping + supplies) |
| Storage fees | Monthly per cubic foot (seasonal) | Your own or 3PL storage costs |
| Prime badge | Yes — automatic Prime eligibility | No — unless using SFP (Sellers Fulfilled Prime) |
| Customer service | Amazon handles returns and support | You handle returns and support |
| Return rate impact | Amazon charges referral fee even on returned items | Same — referral fee is non-refundable |
| International selling | Amazon handles cross-border logistics | You manage international shipping yourself |
| Best for price range | Products above $20 | Products under $20 |
Cost Breakdown by Fulfillment Method
The fee difference between FBA and FBM is often the deciding factor. Let's look at how costs stack up for a typical $24.99 product in the US marketplace.
FBA Costs for a $24.99 Product (1 lb, standard size)
- Fulfillment fee: $6.85 (standard size, 1–2 lb)
- Monthly storage fee: $0.15 per unit
- Referral fee (15%): $3.75
- Advertising (15% ACoS): $3.75
- Return loss (5%): $1.25
- Total fees: ~$15.75 per unit
FBM Costs for the Same $24.99 Product
- Outbound shipping: $4.50 (USPS Ground Advantage)
- Pick & pack: $1.00 per unit
- Monthly 3PL storage: $0.50 per unit
- Referral fee (15%): $3.75
- Advertising (15% ACoS): $3.75
- Return loss (5%): $1.25
- Total fees: ~$14.75 per unit
At this 1 lb size, FBA now runs about $1 per unit higher than FBM ($15.75 vs $14.75) because the 2026 fulfillment fee steps up to $6.85 at the 1–2 lb tier. The balance shifts sharply with product size, weight, and price point: lighter, higher-priced items tilt toward FBA, while heavy or box-shaped goods tilt toward FBM.
When to Choose FBA
- Products priced above $25 where fulfillment fees are a smaller percentage of revenue
- Small, lightweight items like pet grooming tools that qualify for low FBA fees
- Products in competitive categories where the Prime badge drives conversion
- Sellers who want to scale without managing logistics
For example, a product like wireless earbuds at $29.99 benefits from FBA because the Prime badge increases conversion rates by 15-25% in competitive categories, and Bluetooth speakers follow the same pattern.
When to Choose FBM
- Products under $20 where FBA fees consume too much margin
- Heavy or oversized items with high dimensional weight fees on FBA
- Products with very low return rates (<3%)
- Sellers who already have a 3PL relationship with better rates
For example, board games (typically 1.5 lbs at $29.99) often perform better with FBM because dimensional weight pricing makes FBA expensive for box-shaped items. Box-shaped goods such as food storage containers show the same dimensional-weight penalty.
Use our free profit calculator to model both FBA and FBM scenarios with your actual product dimensions and costs.
Run your product's numbers before you commit
Model referral, FBA/FBM fulfillment, storage, ACoS and returns for the US, DE and JP in one place.
Open the free profit calculator →Frequently asked questions
Is FBA or FBM more profitable?
Neither wins universally. FBA tends to win above $25 and on small, lightweight products where the Prime badge lifts conversion. FBM tends to win under $20, on heavy or oversized box-shaped items, and on products with very low return rates. Profit comes down to the gap between Amazon's fulfillment fee and your own pick, pack and ship cost.
When does FBM beat FBA?
FBM usually beats FBA for low-priced items where FBA fees consume too much margin, for heavy or oversized products hit by dimensional-weight pricing, and for slow-moving inventory where monthly FBA storage and long-term surcharges build up. Sellers who already have a cheaper 3PL rate are also stronger on FBM.
Do I still pay the Amazon referral fee on FBM orders?
Yes. The referral fee applies to both FBA and FBM orders because it is Amazon's commission on the sale, not a fulfillment charge. It is calculated on the total sale price and is non-refundable even when the buyer returns the unit. FBM only replaces the fulfillment and storage charges, not the referral fee.