TL;DR
- Decide why you’re moving: throughput, cost per order, peak coverage, or international growth.
- Pick integration style: plugin (fast), API (custom), or middleware (flexible).
- Standardise data: SKU weights/dimensions, packaging types, service mapping.
- Automate labels: rules pick Royal Mail/Evri/DPD; enable scan‑to‑print and returns.
- Measure KPIs: pick rate, DIFOT, reprint rate, unit economics.
Readiness checklist
Catalogue & packaging
- Accurate weights/dimensions for top 200 SKUs
- Defined packaging matrix (boxes/bags)
- Fragile/oversize flags where relevant
Shipping methods
- Standard, Express, International clearly named
- Map to carrier services and SLAs
- Return authorisation process in place
Data flows
- Order import cadence & cut‑offs
- Stock sync rules and backorders
- Tracking + status updates to customers
Integration options (plugin, API, middleware)
There are three main ways to connect WooCommerce to a 3PL warehouse:
- Plugin: Easiest path. Good for standard flows. Be sure it supports your required services and label formats.
- Direct API: Maximum control. Best for complex SLAs or custom documents, but adds maintenance overhead.
- Middleware (ParcelOffice): Centralises rules, multi‑warehouse routing, and label generation across carriers.
30‑60‑90 day rollout
- 30 days: Connect sandbox → sync sample orders → validate packaging and service mapping.
- 60 days: Pilot in production (10 - 20% of orders). Track reprint rate, mis‑routes, and cycle times.
- 90 days: Full cutover. Enable multi‑warehouse routing and returns automation.
Label automation & formats
- Royal Mail: Tracked 24/48 for light parcels. Use 100×150 mm, scale 100%.
- Evri (Hermes): Value option for standard parcels. Verify DPI and barcode readability.
- DPD: Premium experience (Predict). Enable multi‑parcel consignments if needed.
Related: How to print RM/Evri/DPD labels • Best UK shipping options
Multi‑warehouse routing
Route by region, stock status, SKU class, or priority customers. Keep a clear precedence order and a fallback to avoid stuck orders.
3PL shortlist & RFP questions
Integration
- Native WooCommerce connector?
- API docs + webhook events
- Sandbox and go‑live support
Operations
- Cut‑offs, SLAs, exception handling
- Carrier mix (RM/Evri/DPD/UPS/DHL)
- Returns & sustainable options
Commercials
- Rate cards + surcharges
- Peak pricing caps
- Exit terms and data access
KPIs that matter
- DIFOT (Delivered In‑Full On‑Time)
- Pick/pack rate (orders/hour/operator)
- Label reprint rate (target < 1%)
- Cost per order (incl. surcharges & returns)
- WISMO tickets (Where Is My Order)
Common pitfalls (and fixes)
- Bad product data → Fix weights/dimensions; audit top SKUs quarterly
- Over‑customisation → Prefer rules over bespoke scripts
- Under‑testing returns → Pilot RM/DPD return labels before peak
- No exception playbook → Define steps for address fails, stockouts, and label errors
ParcelOffice for WooCommerce 3PL
Orchestrate carriers, labels, and warehouses from one place. Rules choose the best service; operators scan and print instantly.
“Ship orders containing lithium-ion batteries (UN3481, ≤2 per box) via UPS Worldwide Saver with dangerous goods ticked; include DG note and commercial invoice.”
Labels:
- 1 × UPS Worldwide Saver (DG permitted) (4×6)
- DG Handling Note + Commercial Invoice (3 copies) (auto‑printed or paperless depending on lane)
“If an order contains a ‘multi-box kit’ SKU, print one master label plus child parcel labels and a branded return label inside the master.”
Labels:
- 1 × Master (‘Parent’) label: DHL eCommerce Domestic (4×6)
- 2 × Child (‘Contents’) labels (internal scan labels)
- 1 × Pre‑authorised Royal Mail Tracked 48 Return (in‑box)
FAQs
Which 3PLs work best with WooCommerce?
Look for providers with a native WooCommerce connector or proven API experience, solid UK/EU carrier options, and clear onboarding SLAs.
Can I phase in a 3PL?
Yes - start with one warehouse or product line, then expand once KPIs are stable.