Selling online looks simple: list a product, take the order, ship it. But once you hand the work to a third-party logistics (3PL) warehouse, the bill stops being a single number. A fulfillment invoice stacks pick-and-pack fees, outbound shipping, monthly storage, receiving, account management, and surcharges on top of each other, and a seller who only tracks the "per-order" quote is usually surprised by the month-end total. This fulfillment cost calculator adds up every major line so you can see exactly what each order really costs to deliver — and whether switching warehouses, raising prices, or shipping from a new region actually improves your margin.
Adjust the sliders and every figure updates instantly. The result card breaks the monthly bill into pick-and-pack, shipping, storage, and fixed fees, then projects the annual spend and the true cost per order, so you can compare two 3PL quotes side by side before you sign a contract.
How to Use
- Enter your Monthly Orders — the average number of customer orders your warehouse ships each month. This is the volume that drives the per-order fees.
- Set the Pick & Pack Fee your 3PL charges per order. Typical US rates run from about $2.50 for simple single-item orders up to $5.00 or more for kitted, multi-item, or fragile goods.
- Enter the Outbound Shipping cost per order. This is the average parcel rate your warehouse negotiates with carriers, not your postage label price alone.
- Add your Storage Space Used in cubic feet. Most warehouses bill storage on the average inventory footprint you occupy during the month, not the peak.
- Set the Storage Rate per cubic foot per month. US 3PL storage commonly runs $0.50–$1.20 per cubic foot per month, and often spikes 2–3× during Q4 peak season.
- Fill in Other Monthly Fees with account-management, software, receiving, or subscription charges that recur every month.
The result card shows the monthly pick-and-pack subtotal, the monthly shipping subtotal, the monthly storage subtotal, the total monthly fulfillment cost (highlighted), the annual projection, and the blended cost per order. Compare that cost-per-order figure against your product price to see how much room you actually have for advertising and profit.
The Fulfillment Cost Formula
A 3PL bill is a linear fee stack. There are no discount curves baked into the base model:
Total Monthly = (Pick & Pack × Orders) + (Shipping × Orders) + (Storage Rate × Cubic Feet) + Other Monthly Fees
Where:
- Pick & Pack × Orders is the labor cost of pulling each item off a shelf and boxing it.
- Shipping × Orders is the carrier cost to deliver the parcel to your customer.
- Storage Rate × Cubic Feet is the rent on the warehouse space your inventory sits in.
- Other Monthly Fees is everything else billed on a recurring basis.
Worked example at the defaults: 500 orders at $3.50 pick-and-pack and $6.50 shipping gives $1,750 + $3,250 = $5,000 in per-order fees. Add 500 cubic feet of storage at $0.80 per cubic foot ($400), and the total monthly fulfillment cost is $5,400. Spread across 500 orders, that is a blended $10.80 per order, and annualized the business spends $64,800 on fulfillment alone.
Notice what happens when order volume rises while storage stays flat: the per-order cost drops, because the fixed storage bill is divided across more orders. That is the core economics of outsourcing fulfillment — and why a warehouse that looks expensive on a low-volume quote can become cheap once you scale.
What Each Line Actually Pays For
- Pick & Pack — the warehouse worker walks to your bin, scans the SKU, packs it, and prints a label. It is charged per order (not per item for single-SKU boxes), and rises with kitting, gift wrapping, or inspection requests.
- Outbound Shipping — the negotiated UPS, FedEx, or USPS rate your 3PL gets. Larger warehouses ship enough volume to beat retail postage by 20–40%, which is often the single biggest reason to outsource.
- Storage — rent for the cubic feet your pallets and bins occupy. Fast-moving SKUs spend days in the warehouse; slow-moving SKUs can sit for months and quietly erase your margin.
- Other Fees — receiving (unloading your inbound freight), account management, returns processing, and WMS software access.
Examples
Example 1 — A small DTC brand at default volume. A store ships 500 orders a month, pays $3.50 pick-and-pack and $6.50 outbound shipping, keeps 500 cubic feet of inventory at $0.80 per cubic foot, and has no fixed fees. Pick-and-pack is $1,750, shipping is $3,250, storage is $400. Total monthly fulfillment is $5,400, annualized $64,800, at $10.80 per order. If the average order value is $45, fulfillment alone eats 24% of revenue before ads and COGS.
Example 2 — Scaling up. The same brand grows to 2,000 orders a month and renegotiates to $4.25 pick-and-pack and $7.80 shipping, while storage grows to 1,200 cubic feet at $0.95 per cubic foot plus a $250 account-management fee. Pick-and-pack is $8,500, shipping is $15,600, storage is $1,140, and fixed fees are $250. Total monthly fulfillment is $25,490, annualized $305,880, at $12.74 per order. Even though volume quadrupled, the per-order cost only crept up by about $1.94 because the renegotiated rates and fixed-fee dilution absorbed the storage growth.
Example 3 — A high-volume operation. At 1,000,000 orders a month with $3.50 pick-and-pack, $6.50 shipping, and 50,000 cubic feet of storage at $0.80, the monthly bill reaches $10,040,000 and $120,480,000 a year — a reminder that at scale, even a $0.10 per-order improvement is a six-figure annual decision.
FAQ
How is fulfillment cost calculated?
Total monthly fulfillment cost equals (pick-and-pack fee × monthly orders) + (outbound shipping fee × monthly orders) + (storage rate × cubic feet stored) + other recurring monthly fees. Divide that monthly total by the number of orders to get the blended cost per order.
What is a good fulfillment cost per order?
For a typical e-commerce store, a blended fulfillment cost between $8 and $12 per order is common at small volumes. Below $6 you are usually doing most work in-house or shipping very light, cheap-to-pick items; above $15 your products may be oversized, kitted, or in an expensive peak-season storage tier.
How does 3PL storage pricing work?
Warehouses usually bill storage on the average cubic feet your inventory occupies during the month, commonly $0.50–$1.20 per cubic foot. Many apply a higher "peak" storage rate from October through December, and long-term storage surcharges for SKUs that have not moved in 90–180 days.
Is it cheaper to self-fulfill or use a 3PL?
Self-fulfilling avoids the per-order pick fee but locks in your own labor, packing materials, and slower carrier rates. A 3PL usually wins once you are past roughly 100–200 orders a month, because its negotiated shipping discounts and scale labor beat in-house handling. Use this calculator to compare your current in-house hourly labor against a 3PL quote.
What hidden fees should I watch for?
Receiving and put-away, returns processing, kitting and gift wrapping, custom packaging, label corrections, and fuel surcharges are often quoted separately. Ask each warehouse for an itemized monthly invoice so those lines feed into the "Other Monthly Fees" field rather than surprising you later.
How can I lower my fulfillment cost?
Three levers move the needle most: renegotiate outbound shipping with a higher-volume 3PL, slow down storage by only stocking fast-moving SKUs near peak season, and raise the order value so the fixed per-order fee is a smaller percentage of each sale.
Disclaimer
This fulfillment cost calculator is provided for informational purposes only and does not constitute financial, accounting, or logistics advice. Estimates are based on the inputs you enter and a standard linear 3PL fee stack; actual quotes vary by warehouse, region, product size tier, weight, season, and carrier agreement. Storage rates and surcharges are approximations. Always confirm final fees directly with your chosen 3PL and review a sample invoice before signing a contract.