Prioritize WMS compatibility, SLA definitions for order-to-ship time, pick-and-pack accuracy rates, scalability of racked and bulk space, and clear pricing for inbound receiving, storage tiers, and outbound handling. Insist on KPIs, audit rights, and contingency plans for peak demand.

Carrier access directly affects delivery windows and landed cost. Choose 3PLs with established regional trucking lanes, scheduled carrier pickups, and proven last-mile partners to minimize transit variability and support consistent SLAs across eCommerce and B2B channels.

Expect a mix of fixed and variable charges: monthly storage (per pallet or per cubic metre), receiving fees, pick-and-pack and fulfillment fees (per order/line), outbound freight handling, and value-added service fees. Volume discounts, minimums, and seasonal surcharges are typical negotiable elements.

Confirm the 3PL offers customs brokerage or established partnerships, documentation handling for export/import, bonded storage if required, and clear processes for duties and declarations. Verify experience with regional trade corridors and real-world examples of shipments processed through border crossings.