Returns Processing Cost Calculator

Understanding the returns processing cost calculator — concept and principle

Every returned item has to be received, inspected and repackaged, and the ones that cannot be sold again are written off. This calculator adds those costs up for a month of returns and shows the average cost per return. Operations and ecommerce teams use it to budget the returns desk, compare in-house handling with a third-party logistics provider and see how much better restocking would save.

How it is calculated

• Per return = inspection + repackaging + (1 − restockable ÷ 100) × product cost
• Monthly cost = returns per month × per return

In other words, every return carries the handling cost, and the share that cannot be restocked also loses its product cost. The calculator shows USD by default but works with any currency. Return shipping is not included; enter it separately if you pay it.

The principle

Returns costs have two layers. Handling is paid on every returned item, so it scales directly with the number of returns. Write-offs are paid only on items that fail inspection, so the product cost is weighted by the non-restockable share. This is an expected value: on any one return the write-off is either the full cost or nothing, but averaged over many returns it equals cost × share not restocked. Multiplying the average by the monthly volume gives the budget figure.

Worked example

1. Inputs: 200 returns a month, inspection $1.20, repackaging $0.90, 75% restockable, product cost $14.
2. Handling per return: 1.20 + 0.90 = $2.10.
3. Expected write-off per return: (1 − 0.75) × 14 = 0.25 × 14 = $3.50.
4. Per return: 2.10 + 3.50 = $5.60.
5. Monthly cost: 200 × 5.60 = $1,120.00 (handling $420 plus write-offs $700).

How to read the result

Look at which layer dominates. Here write-offs ($700) are larger than handling ($420), so better packaging, gentler shipping or clearer return conditions that keep items resellable would save more than speeding up inspection. Each 5-point rise in the restockable share saves 0.05 × 14 × 200 = $140 a month in this example. If handling dominates, process changes or outsourcing may matter more.

Common mistakes

• Counting restocked items as costless; they still need handling.
• Using retail price instead of product cost for write-offs.
• Leaving out refurbishment or discounting of items sold as open-box.

Frequently asked questions

What is a good restockable rate?

It depends on the product. Sealed or durable goods restock easily; cosmetics, food and hygiene items often cannot be resold at all.

Should labour be included in inspection cost?

Yes. Use staff time per item multiplied by the loaded hourly wage, plus any materials.

How do I compare this with outsourcing?

Compare your per-return handling cost with the provider's per-item fee; the write-off share stays the same unless they also resell or refurbish.

Sources: D. S. Rogers and R. S. Tibben-Lembke, Going Backwards: Reverse Logistics Trends and Practices, Reverse Logistics Executive Council