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🌱 Reselling made simple

Postage for Resellers: The Simple Version

Know who pays, what the parcel size will be and what the label actually costs before you accept a low offer.

Beginner friendlyPlain EnglishUpdated September 2026
Simple answer

Postage affects profit even when the buyer pays it. Packaging, label errors, upgrades and returns can still cost you, so treat delivery as part of the sale rather than an afterthought.

What to do

1. Measure and weigh common parcel types

Keep this step simple and use the real numbers or evidence you have.

2. Know which service you are using before listing

Keep this step simple and use the real numbers or evidence you have.

3. Keep a small packaging cost in your numbers

Keep this step simple and use the real numbers or evidence you have.

4. Save tracking or proof of posting when appropriate

Keep this step simple and use the real numbers or evidence you have.

Simple example

A £12 sale can feel fine until you discover you used £1 of packaging and paid an extra £3 because the parcel was larger than expected.

Common mistake

Guessing parcel size can turn a profitable low-value sale into a waste of time.

Use MyCost when the numbers start getting messy

MyCost can keep the item cost, storage location, sale and real profit together so you do not have to remember it all.