At some point, every growing Shopify brand faces the same question: should we keep fulfillment in-house or hand it off to a 3PL?
It is an easy decision to make on instinct and an expensive one to get wrong. This guide gives you the cost structure. The math is yours to run, on your own numbers.
What does in-house Shopify fulfillment really cost?
Self-fulfillment feels cheap until you start counting everything:
Fixed costs:
- Warehouse rent: whatever a unit that size costs in your metro
- Labor: 1 full-time employee = salary plus payroll taxes and benefits, at your local rate
- Equipment: shelving, packing station, label printer, scale — a one-time outlay you can price from any supplier catalogue
- Packaging materials: boxes, poly mailers, tape, void fill
Variable costs:
- Carrier accounts: you’re paying retail rates unless you have volume
- Returns processing: every return costs you time and materials
- Shipping errors: you eat the cost of reshipping
Add it up for a brand shipping 300 orders/month and you’re holding your real all-in cost per order — before your own time.
What does a 3PL actually cost?
A good 3PL charges you:
- Receiving fee: charged per unit or per pallet
- Storage: charged per cubic foot, per bin or per pallet, per month
- Pick & pack: charged per order, usually with a lower rate for each additional item
- Shipping: at their negotiated carrier rates (ask them to show you the discount against your current rates)
Ask any 3PL you are considering to put all four of those lines in writing. A price you cannot rebuild from a rate card is not a rate — it is a quote.
At what order volume does a 3PL break even?
There is a break-even point, and it sits at a volume only your own two sets of numbers can tell you. Below that, self-fulfillment often wins on pure cost. Above it, the 3PL math starts working in your favor — especially once you factor in:
- Your time (founders should not be packing boxes)
- Scalability during peak seasons
- Carrier rate access
- Returns infrastructure
Why does location matter more than price?
Here is the part that gets underestimated: the location of your 3PL affects every single shipment cost.
Carrier pricing uses a zone system — the further a package travels, the more it costs. Hold your inventory in the middle of the country and East Coast orders travel a long way up the zone table. From Shipo’s warehouse in Wilmington, Delaware, the UPS Ground zone chart for our origin band puts New York, Newark, Philadelphia, Baltimore, Washington DC and Richmond in Zone 2, and Boston and Pittsburgh in Zone 3 — Zone 2 being the lowest ground zone on that chart, as there is no Zone 1 to ship into. It is not uniform all the way down the coast: Atlanta, Orlando and Miami all bill at Zone 5 from us. (Source: UPS Zone Chart for shipments originating in ZIP Codes 197-01 to 198-99.) About 33% of the US population lives in the East Coast states (U.S. Census, July 2025 estimates) — not a majority of the country, but a third of it, concentrated in exactly that band.
The zone difference can mean real money per package — on every order. At 500 orders/month, that’s a line you can only quantify by repricing your own carrier invoice from a Delaware origin.
Why does the order cutoff time matter?
Somewhere in the day there is a time after which today’s orders become tomorrow’s shipments, and it is rarely advertised. Ask any 3PL you are considering for theirs in writing, and ask whether that is the time the order has to reach them or the time the carrier collects. That means any order that comes in during your afternoon flash sale, your email campaign, or just regular afternoon shopping — doesn’t ship until the next day.
Shipo processes orders until 3 PM ET for same-day fulfillment. For brands running promotions or selling to customers who expect fast shipping, this matters.
What should you look for in a Shopify 3PL?
1. Native Shopify integration — real-time inventory sync, automatic order routing, tracking updates pushed back to Shopify
2. Same-day cutoff time — ask for the cutoff in writing, and ask which time zone it is in
3. Location that matches your customers — the closer your inventory sits to where your orders actually go, the lower the zone on every parcel
4. Transparent pricing — get a full rate card before signing anything
5. Returns handling — does the 3PL receive, inspect, and restock returns?
The Free Cost Audit
If you’re currently self-fulfilling or working with a 3PL and want to know what the real numbers look like, Shipo offers a free cost audit.
Send us your current shipping volume, average order weight, and current 3PL invoice (or carrier statement). We’ll build a side-by-side comparison and show you exactly what you’d pay with Shipo.
No sales pressure. Just the math.
→ Request your free cost audit at shipousa.com