Hong Life CalculatorsUnderstanding the 3PL warehouse cost per order — concept and principle
A third-party logistics (3PL) provider stores your inventory, picks and packs each order and receives inbound stock for you. Its invoice mixes several fee types, so it is hard to see what fulfilment costs per sale. This calculator turns the three main monthly charges into one number, the warehouse cost per order, for pricing, comparing 3PL quotes or deciding whether to fulfil in-house. It works with any currency.
How it is calculated
Monthly 3PL cost = pallets stored × storage fee per pallet per month + orders per month × pick & pack fee per order + monthly receiving charge.
Cost per order = monthly 3PL cost ÷ orders per month.
- Pallets stored and storage per pallet give the fixed storage bill, which you pay whether you ship many orders or few.
- Pick & pack per order is a variable fee that grows one-for-one with order volume.
- Receiving per month covers unloading, counting and putting away inbound goods; enter your average monthly amount.
The principle
Cost per order is an average cost: total cost divided by output. Within a month, storage and receiving behave like fixed costs, while pick & pack is variable. Spreading the fixed part over more orders lowers the average, so cost per order falls as volume rises and climbs when sales slow but stock stays on the shelf. Postage, packaging, returns and account minimums are not included unless you add them to an input.
Worked example
- Storage: 20 pallets × $18 = $360.
- Pick & pack: 1,500 orders × $2.20 = $3,300.
- Add receiving: $360 + $3,300 + $150 = $3,810 monthly 3PL cost.
- Cost per order: $3,810 ÷ 1,500 = $2.54.
How to read the result
Compare the cost per order with your average order value and gross margin. If fulfilment eats much of the margin on small orders, consider a minimum order value or bundles. Look at the split too: here pick & pack is about 87% of the bill, so negotiating that fee matters more than storage. If storage dominates, you probably hold too much slow-moving stock. Re-run the numbers at low-season and peak volumes.
Common mistakes
- Leaving out extra fees such as packaging, inserts, per-item picks beyond the first unit, or monthly minimum charges.
- Using peak-season order volume, which makes the fixed storage cost look smaller than it normally is.
- Counting pallets at month end instead of the average pallets billed.
Frequently asked questions
What is a reasonable 3PL cost per order?
It depends on items per order, product size and region. Compare quotes on the same order profile rather than one benchmark.
Should shipping postage be included?
Not in this calculator. Add postage separately to get the full landed fulfilment cost per order.
Why does my cost per order rise in quiet months?
Storage and receiving do not shrink when orders drop, so the same fixed amount is divided by fewer orders.
Sources: Farris, Bendle, Pfeifer & Reibstein, Marketing Metrics (Pearson) — average and variable cost concepts · Council of Supply Chain Management Professionals (CSCMP), Supply Chain Management Terms and Glossary