What Is a 3PL?
A Third-Party Logistics provider (3PL) is a company that handles your warehousing, order fulfillment, and shipping on your behalf. You send your inventory to their warehouse, and they pick, pack, and ship orders as they come in.
Major 3PL providers include ShipBob, Deliverr, Red Stag Fulfillment, ShipMonk, and traditional fulfillment centers.
3PL vs. In-House: Key Differences
| Factor | 3PL | In-House |
|---|---|---|
| Warehousing | 3PL warehouse | Your own space |
| Labor | Their employees | Your employees |
| Shipping rates | 3PL’s carrier rates | Your carrier rates |
| Control | Limited | Full |
| Scalability | High (their capacity) | Limited (your space/staff) |
| Startup cost | Low | High (lease, equipment, staff) |
| Per-unit cost | Higher at low volume | Lower at high volume |
Cost Comparison
3PL Cost Structure
3PLs typically charge:
| Fee | Typical Range |
|---|---|
| Storage (per pallet/month) | $15–$40 |
| Pick and pack (per order) | $2.50–$5.00 |
| Per additional item | $0.50–$1.50 |
| Packaging materials | $0.50–$2.00 |
| Shipping label | Carrier rate + markup |
| Return processing | $3.00–$7.00 |
In-House Cost Structure
| Cost Component | Typical Monthly (1,000 orders) |
|---|---|
| Warehouse rent | $2,000–$5,000 |
| Labor (1–2 people) | $4,000–$8,000 |
| Packaging materials | $500–$1,000 |
| Equipment/utilities | $500–$1,000 |
| Shipping (your carrier rates) | Varies |
The Crossover Point
| Volume | More Cost-Effective |
|---|---|
| < 200 orders/month | 3PL (avoid fixed costs) |
| 200–1,000 orders/month | Depends on product/margin |
| 1,000–5,000 orders/month | In-house often wins |
| 5,000+ orders/month | In-house or hybrid |
When to Use a 3PL
- Startup phase: No capital for warehouse commitment
- Rapid growth: Need to scale faster than you can hire
- Geographic reach: Want warehouses in multiple locations
- Seasonal business: Avoid fixed costs during off-season
- International expansion: 3PLs with global networks simplify cross-border
When to Stay In-House
- Custom packaging/branding: You need precise control over unboxing experience
- Complex products: Assembly, kitting, or quality checks required
- Margins require it: 3PL fees eat too much margin at your price point
- Speed requirements: You need faster processing than 3PLs guarantee
- Carrier rate advantage: Your negotiated rates are better than the 3PL’s
Shipping Rate Considerations
3PLs use their own carrier contracts, which means:
- They may get better rates than you (higher aggregate volume)
- They may get worse rates on certain services (different shipping profile)
- You typically can’t use your own carrier rates when using a 3PL
- Rate transparency varies — some 3PLs markup carrier rates, others pass through
How to Evaluate 3PL Shipping Rates
Ask for:
- Their published rate card for your typical package profile (weight, zone, service)
- Whether they pass through carrier rates or mark up
- Whether you can bring your own carrier account
The Hybrid Approach
Many growing shippers use a hybrid model:
- In-house fulfillment from primary warehouse
- 3PL for overflow, seasonal peaks, or regional distribution
- Separate 3PL for returns processing
The Bottom Line
The 3PL vs. in-house decision is primarily about volume, margins, and control. At low volumes, 3PLs eliminate fixed costs. At high volumes, in-house operations offer better unit economics and control. Evaluate the total cost — including shipping rates, not just fulfillment fees — to make the right decision for your business stage.
Upload one invoice to ShipMint’s Instant Analysis for a cost benchmark — free.