Hire an Amazon 3PL or Do It Yourself?
Every Amazon seller faces this question at some point: should I handle fulfillment myself, or should I hire an Amazon 3PL? The answer depends on your monthly volume, growth goals, and how you value your time. In this guide, we break down the real costs of both approaches so you can make an informed decision.
What Is an Amazon 3PL?
A third-party logistics provider (3PL) for Amazon handles the entire prep-to-shipment cycle: receiving your inventory, inspecting it, labeling with FNSKU barcodes, prepping (poly bagging, bundling, shrink wrapping), creating Amazon shipments, and forwarding to fulfillment centers. You send raw inventory; they deliver FBA-ready shipments. Think of it as outsourcing everything between your supplier and Amazon's warehouse.
The True Cost of DIY Fulfillment
Most sellers underestimate the real cost of doing it themselves. Here is what DIY actually looks like at 10,000 units per month:
| Expense | Monthly Cost |
|---|---|
| Warehouse rent (2,000+ sq ft) | $2,500 - $5,000 |
| Labor (2 full-time workers) | $6,000+ |
| Equipment (labels, printer, supplies) | $500 - $800 |
| Utilities, insurance, overhead | $800 - $1,200 |
| Your time (opportunity cost) | Priceless |
| Total | $10,000 - $13,000+ |
And that does not include the cost of errors. With manual prep, error rates of 1-2% are common. At Amazon's 2026 inbound defect penalty rates ($0.32 to $5.72 per unit), those mistakes add up fast.
The Cost of an Amazon 3PL
A professional Amazon 3PL like PrepVia charges per unit, which means your costs scale directly with your business. At 10,000 units per month, you are looking at roughly $4,000 to $6,000 total, including labeling, poly bagging, inspection, and shipment to Amazon. That is 40-50% less than DIY, with 99.9% accuracy and 24-36 hour turnaround.
Side-by-Side Comparison
| Factor | DIY | Amazon 3PL |
|---|---|---|
| Monthly cost (10K units) | $10,000 - $13,000 | $4,000 - $6,000 |
| Prep turnaround | 5-10 days | 24-36 hours |
| Error rate | 1-2% | Less than 0.1% |
| Scalability | Limited by space and staff | Elastic capacity |
| Your time investment | 20-40 hours/week | Near zero |
| Amazon check-in speed | 7-14 days | As fast as 35 hours (FastLane) |
When to Keep Doing It Yourself
DIY makes sense if you are moving fewer than 500 units per month, have free warehouse space, and enjoy the hands-on work. At low volumes, the per-unit economics of a 3PL may not justify the switch. But the moment you cross 1,000 units per month and feel the operational drag on your time, it is worth getting quotes.
When to Hire an Amazon 3PL
You should seriously consider a 3PL if any of these apply:
- You process more than 1,000 units per month.
- You spend more than 10 hours per week on prep and shipping.
- Your error rate is causing Amazon defect fees.
- You want to expand to multiple marketplaces (Walmart, Shopify, eBay).
- You need faster Amazon check-in to avoid stockouts.
- You want Net-30 payment terms to improve cash flow.
Why PrepVia as Your Amazon 3PL
PrepVia combines automation (13,200 units/hour labeling throughput), speed (24-36 hour prep SLA, FastLane 35H guarantee), and financial programs (Net-30, no minimums) into one Amazon SPN Certified 3PL. You get the scale of a large operation with the attention of a partner who treats your inventory like their own.
Get a free quote from PrepVia and see how much you save switching to an Amazon 3PL.