Mailers, boxes, tape, labels and protective material are small individually but meaningful across hundreds of orders. Pack to the courier rules and the item risk. Saving pennies on the wrong service can be expensive when something goes wrong.
What matters most
The easiest way to think about how to track packaging costs is to keep it simple. Use the facts you know, keep the important details together and learn from what actually sells.
- Calculate average cost by parcel type
- Buy bulk only where usage is predictable
- Track premium packaging separately
- Review cost per order quarterly
A practical workflow
- Start with the item or decision. Record the facts you know before changing price, listing details or stock status.
- Check the money. Use purchase cost, expected or actual sale price, fees, postage and packaging so the outcome is based on profit after costs.
- Make one clear change. Change the factor most likely to matter instead of editing everything at once.
- Track the result. Save what happened so future sourcing, pricing and listing choices get better.
- Review in batches. Weekly or monthly reviews are more useful than reacting emotionally to one item.
Numbers worth tracking
You do not need a giant spreadsheet. These few numbers are usually enough to tell whether things are working:
Common mistakes
- Weighing before packaging
- Ignoring packaging cost
- Using uninsured services for valuable items
- Not retaining proof of dispatch
What to do next
Try this on a small group of real items first. If it helps, make it part of your normal routine. There is no need to change everything at once.
Related guides
UK Reseller Postage Guide
Choose a service based on parcel size, value, speed, tracking and claim protection rather than headline price alone.
How to Weigh Parcels Correctly
Weigh the fully packed parcel and measure the outer dimensions before buying a label.
Combined Postage and Profit
Combined shipping can save the buyer money, but check parcel size and total weight before promising a discount.
Quick questions
Do I need special software for this?
No. You can start with a clean spreadsheet or notes. Software becomes useful when you have enough stock that manual updates are slowing you down or causing mistakes.
How often should I review it?
For active sellers, a quick weekly check plus a fuller monthly review is usually enough to spot problems before they become expensive.
Should I optimise for the highest possible sale price?
Not always. Money coming in and going out, days-to-sell, risk and the amount of work involved can make a slightly lower but faster, cleaner sale more profitable overall.