Amazon FBA vs FBM Calculator

Determine size tier

Weight + dimensions (L×W×H)

2 lbs, 10"×8"×4"

= Small Oversize

Amazon FBA has 5 size tiers with different fulfillment fees. Your product fits Small Oversize tier. Example: Sports equipment, furniture under 70 lbs

Amazon FBA size tier pricing

FBA referral fee (15%)

sale price × 0.15

$40.00 × 0.15 = $6.00

= $6.00

Amazon charges 15% referral fee on most product categories.

Amazon seller central

FBA fulfillment fee

Size tier fee (Small Oversize)

$8.49 per unit

= $8.49

Covers picking, packing, shipping, and customer service. Varies by size tier.

Amazon FBA fulfillment pricing

FBA total fees per unit

referral fee + fulfillment fee

$6.00 + $8.49 = $14.49

= $14.49

Combined cost to sell through FBA per unit.

FBA fee calculation

FBA net profit per unit

sale price − FBA fees − COGS

$40.00 − $14.49 − $12.00 = $13.51

= $13.51

Your profit per unit after all Amazon fees and your cost.

Profit calculation

FBM shipping estimate

flat estimated shipping cost per unit

$5.00 per unit

= $5.00

This tool uses a mid-range domestic self-ship estimate for FBM to compare against Amazon's FBA handling costs.

FBM shipping assumption used by the calculator

FBM net profit per unit

sale price − FBM shipping estimate − COGS

$40.00 − $5.00 − $12.00 = $23.00

= $23.00

FBM skips Amazon fulfillment fees, but you absorb the shipping cost and operational work yourself.

FBM unit profit formula

Per-unit profit difference

FBM net profit per unit − FBA net profit per unit

$23.00 − $13.51 = $9.49

= $9.49

This isolates the fulfillment-model effect before monthly volume is applied.

Per-unit profit comparison

Annual profit difference

(FBM profit − FBA profit) × units per month × 12

($23.00 − $13.51) × 10 × 12 = $1,138.80

= $1,138.80

Over a year, FBM (Self-Ship) nets you $1,138.80 more profit.

Annual profit comparison