FBA vs FBM Profit Calculator
Which fulfillment method actually makes you more money in 2026? Side-by-side, real-time.
Inputs
Comparison
FBA net profit per unit$0.00
FBM net profit per unit$0.00
FBA margin0%
FBM margin0%
FBA ROI0%
FBM ROI0%
Winner—
When FBA wins, when FBM wins
01 / decision guide[ FBA ]
FBA wins when
Your product is small, light, turns fast, and Prime shipping gives you a Buy Box boost that outweighs the $3-6 FBA fee. Typical for items under 1 lb and under $40.
[ FBM ]
FBM wins when
Your product is large, fragile, has long shelf life, or your self-fulfilled shipping is under $4. Also useful for testing a new SKU without locking up inventory fees.
[ ∞ ]
The break-even
For a 0.75 lb item in Home & Kitchen, FBM starts to win when your outbound shipping drops below ~$3.50. Below that, FBA's $4.98 + placement + storage + low-inventory fees outweigh Prime's Buy Box benefit.