About the Order Fulfillment Cost Calculator
This fulfillment cost calculator adds up every charge on a typical 3PL invoice — receiving, monthly storage, pick fees for the first and additional items, packaging, account fees and outbound shipping — and turns it into a single cost per order and cost per unit. Use it to compare 3PL quotes on a like-for-like basis or to check what in-house fulfillment really costs.
It is designed for e-commerce brands, Amazon and Shopify sellers and operations managers. For an in-house warehouse, enter your own equivalents: labor cost per pick and per unit received, rent per pallet position, and your boxes and fill material per order.
Receiving is estimated on the units you ship each month, assuming inventory is replenished at the same rate it sells. Shipping is optional; leave it at zero to see fulfillment cost alone, which is how most 3PL quotes are compared.
With the default inputs, the total cost per order is $5.23. Change any value above to recalculate instantly.
How to use the order fulfillment cost calculator
- 1Enter monthly orders and the average number of units per order.
- 2Enter receiving cost per unit and storage (pallets × rate per pallet).
- 3Enter pick fees for the first and each additional item, and packaging cost per order.
- 4Add fixed monthly fees and, optionally, average shipping per order.
- 5Compare cost per order and the breakdown to find the biggest cost drivers.
Formula and method
Monthly units shipped are orders × average units per order. Receiving is charged on those units (assuming inventory is replenished as it sells), storage is pallets × the monthly rate per pallet, and pick and pack is the first-item fee per order plus the additional-item fee for every extra unit. Packaging and shipping are per order, and fixed monthly fees are added once.
Dividing the monthly total by orders gives cost per order; dividing by units gives cost per unit. Fixed and storage costs are spread across all orders, so cost per order falls as volume grows — a key reason 3PL quotes look different at different order volumes.
- Units
- Orders × average units per order
- Pallets
- Average pallet positions occupied during the month
- Fixed
- Account, software and minimum fees per month
Worked examples
2,000 orders a month at 1.5 units each
3,000 units received cost $750, 40 pallets cost $1,000, picks cost 2,000 × $3 + 1,000 extra items × $0.75 = $6,750, packaging $1,700 and fixed fees $250 — $10,450 a month. That is $5.23 per order or $3.48 per unit.
Small brand including shipping
Receiving $150 + storage $300 + picks $1,750 + packaging $600 = $2,800 of fulfillment, or $5.60 per order. Adding $8.50 shipping on 500 orders ($4,250) brings the total to $7,050, or $14.10 per order.
Frequently asked questions
How do you calculate fulfillment cost per order?+
Add all monthly fulfillment charges — receiving, storage, pick and pack, packaging and fixed fees — and divide by the number of orders shipped that month. Add shipping if you want the full landed cost of getting an order to the customer.
What does a 3PL charge for pick and pack?+
Most 3PLs charge a per-order fee that covers the first item, plus a smaller fee for each additional item in the same order. Some include packaging in this fee and some bill it separately, so check what each quote includes.
How is 3PL storage usually billed?+
Storage is typically billed per pallet, per bin or shelf, or per cubic foot each month. Slow-moving inventory raises cost per order because you pay to store it while it sells few units.
Is in-house fulfillment cheaper than a 3PL?+
It can be at higher volumes, but in-house costs include rent, labor, equipment, software and management time. Convert those to per-unit and per-pallet equivalents and enter them here to compare against 3PL quotes fairly.
What are hidden 3PL fees to watch for?+
Common extras include monthly minimums, account setup, special project or kitting fees, returns processing, long-term storage surcharges and receiving fees for non-standard shipments. Put recurring ones in fixed monthly fees.
Results are estimates for educational purposes and are not financial advice. Rates, fees and terms vary — confirm with your lender or a licensed advisor before making decisions.