Desk with financial charts and calculator — TCO calculation

What does reusable packaging actually cost? The TCO calculation for webshops

The question everyone asks (but doesn’t say out loud)

Reusable packaging sounds good. Sustainable, PPWR-compliant, customers like it. But when you put it in front of a buyer, almost the same question comes up every time: “What does this cost us per shipment?”

Fair. If the math doesn’t work you’re left with a nice sustainability story and a hole in your margin. In this post I’ll walk through the full Total Cost of Ownership calculation for reusable transport packaging. With concrete numbers, realistic break-even scenarios, and the places where people usually forget something.

If you just want the tool: the Dutch KIDV has a free calculator that does the basic math. For the details of your situation, you have to turn the dials yourself.

What TCO actually means for packaging

TCO isn’t “what do I pay per box”. It’s: what does one shipment truly cost me, averaged across the full life of that box. That means adding up all costs, dividing by the number of times the box is used, and only then comparing with what cardboard costs you.

The variables:

  • Purchase price of the reusable packaging
  • Number of cycles the packaging lasts (depends on material and treatment)
  • Return rate — how many boxes actually come back?
  • Return costs — shipping label, drop-off point, or deposit payout
  • Cleaning/inspection per cycle
  • Storage and handling in your warehouse (people forget this)
  • Replacement costs — some of your pool gets damaged or lost

Cardboard looks cheaper because you only count one column: the box itself. That’s an accounting illusion. There’s also cardboard purchasing, storage space, and now PPWR costs coming on top (declarations of conformity, material specs, EPR contributions per country you sell into).

The break-even point: the formula

Simply put:

Break-even cycles = (Purchase price reusable) ÷ (Price single-use packaging − Cost per cycle)

“Cost per cycle” is everything you’d pay per shipment anyway: return label, washing, inspection. If cost per cycle is €0.80 and your cardboard is €1.20 per unit, you have €0.40 profit per cycle. On a €4.00 reusable box, break-even is reached at cycle 10.

That looks tidy until you throw in the return rate. What if 40% of your boxes don’t come back? Then your effective cycle count roughly halves. Break-even shifts out.

Realistic numbers from practice

What we see in ecommerce:

  • Reusable poly mailers: rated 20+ cycles, practical cycle count 8-15 depending on client
  • Reusable cardboard boxes: rated up to 50 cycles, practice depends heavily on return logistics
  • Stonepacker stone paper box: rated 30+ cycles, practice 12-20 at return rates of 55-70%
  • Ecommerce-wide return rates: 35-70% depending on sector, communication, incentive

The big spread sits in return rate. Fashion (where returns are already a habit) hits 60-70% more easily. Electronics or standalone home decor items score more around 40-50%. B2B fulfillment between businesses sometimes goes above 80% because there’s already a return relationship.

Worked example: 500 shipments per week

Concretely. Say you have a webshop doing 500 medium-format shipments per week. You currently use a cardboard box at €1.20 per unit.

Current cardboard costs: - 500 × €1.20 = €600/week on box purchase - 500 × €0.05 EPR contribution = €25/week - Total: €625/week = €32,500/year

Scenario reusable box: - Stone paper box purchase: €4.00 - Pool build-up: 2 weeks stock = 1000 boxes = €4,000 one-time - Return rate: 60% (realistic with return label) - Effective cycles: 12 (of 30 rated) - Cost per cycle: €0.70 (return label €0.50, inspection €0.20)

Calculation per shipment: - Box cost divided across 12 cycles: €4.00 ÷ 12 = €0.33 - Cost per cycle: €0.70 - Total per shipment: €1.03

Difference: €0.17 per shipment cheaper than cardboard. At 500 shipments/week: €85/week = €4,420/year. Payback on the €4,000 pool investment: under one year.

And this is before you account for cardboard PPWR compliance costs and without the goodwill/brand impact of customers who see the box again.

Where most calculations go wrong

Four places:

1. Too optimistic return rate. You don’t get 80% without an incentive. 45% is realistic without active UX measures. Model conservatively.

2. Forgetting storage space. Reusable boxes waiting for inspection take up warehouse space. Add €0.05-0.15 per cycle for handling.

3. Replacement not modeled. 5-10% of your pool gets damaged or lost annually. Include it in per-cycle cost.

4. Only looking at the box. PPWR compliance costs cardboard users money too. Compare apples to apples: cardboard including conformity and EPR vs reusable including return chain.

When reusable is (still) NOT profitable

Being honest: there are scenarios where it doesn’t work.

  • Volumes under ~1000 shipments/year. Pool build-up and return logistics have overhead you don’t recover at low volumes.
  • Very one-time customers (someone ordering a gift once) — returns often don’t come back.
  • Very light products where cardboard cost per unit sits under €0.30. Break-even shifts too far out.
  • B2C without communication budget. Reusable only works if customers actively participate. Without bandwidth for UX copy and post-purchase mails: fix that first.

For most SMB webshops above 300 shipments/week the math is positive. Below that threshold: look at a shared return network like BOXO, where the pool investment is shared.

What you can do now

Concrete, this week:

  1. Collect your current packaging costs. Per format: purchase price, weekly volume, EPR contribution. Without that base every calculation is guesswork.
  2. Model at 55% return rate (conservatively realistic). If it’s positive at that assumption, higher rates only make it better.
  3. Run a 3-month pilot with one product line. Measure your actual return rate. Adjust your model.
  4. Request a sample and test in your own shipping process whether the material works for your products.

The biggest mistake we see: the idea that reusable is always more expensive. That’s true per unit. It’s not true averaged across cycles. Run the numbers.

Read more

Sources

Back to blog