FBA Supply Chain Optimization: Advanced Strategies
The difference between a profitable and unprofitable Amazon seller often comes down to supply chain efficiency.
The FBA Profit Formula
Profit = Selling Price – (Product Cost + Inbound Shipping + FBA Fees + Advertising + Returns)
Most sellers focus on reducing product cost and advertising. The inbound shipping component is often the most overlooked opportunity.
Inbound Shipping Optimization
| Strategy | Potential Savings |
|---|---|
| Switch from SPD to LTL | 30–50% per unit |
| Switch from LTL to FTL | 20–40% per pallet |
| Use a freight broker | 15–25% vs. direct carrier |
| Consolidate shipments | 20–30% per unit |
| Optimize packaging | 10–20% (dimensional weight) |
Packaging Optimization
Amazon charges based on product size tier. Reducing your package dimensions can drop you into a lower tier:
| Dimension Reduction | Fee Savings |
|---|---|
| Large Standard → Small Standard | $0.64–$1.50/unit |
| Large Bulky → Large Standard | $3.00–$6.00/unit |
| Extra Large → Large Bulky | $15.00–$20.00/unit |
Inventory Velocity Optimization
| Metric | Target | Impact |
|---|---|---|
| Sell-through rate | >3.0 | Higher IPI, lower storage fees |
| Days of supply | 30–60 | Avoid aged inventory surcharges |
| Restock frequency | Every 2–4 weeks | Consistent stock levels |
| Storage utilization | <90% of limit | Avoid overage fees |
Supplier Optimization
- Negotiate EXW or FOB terms — Control your own freight
- Consolidate suppliers — Fewer shipments, lower costs
- Pre-label at factory — Saves $0.15–$0.30/unit at prep center
- Quality inspection before shipping — Avoid costly returns
Multi-FC Strategy
Instead of using Inventory Placement Service ($0.30–$3.50/unit), consider:
- Accept multi-FC distribution — Amazon splits for faster delivery
- Use a freight broker like Indray to manage multiple FTL/LTL deliveries
- Calculate total cost — Sometimes split shipping is cheaper than IPS
Continuous Improvement
Track these monthly:
- Cost per unit shipped to FBA
- Average FC check-in time
- Shipment discrepancy rate
- Storage fee per unit
- Total supply chain cost as % of revenue
Target: Total supply chain cost under 15% of revenue
Partner with Indray to optimize your FBA supply chain costs.
