eBay & Amazon fee calculator
What you actually keep on a sale, after the marketplace fee, the postage you really paid, packaging and tax - with every deduction shown separately, so you can see which one is eating the margin. Set up for Australia; the picker changes the country.
At a starting fee of 12.9% on the sale (a generic default; the Australian eBay preset starts at 13.4% plus A$0.30 an order), A$100 of sales costs A$12.90 in marketplace fees before postage, packaging and tax. Every rate here is an estimate: change it to match your own and check the marketplace's own fee page before you price.
What this calculator works out
Four figures for one sale: what you keep, your margin, your total deductions and the break-even price. The deductions are the marketplace percentage fee, the fixed fee per order, the postage you paid, packaging, a fulfilment fee if you use one, and GST if you are registered.
The starting rates are estimates and have not been confirmed against the marketplaces' fee pages. Check the marketplace's own fee page before you price: eBay Australia private seller fees, eBay Pro and shop fees and Amazon.com.au pricing. Fees change and vary by category, so type in the percentage from your own invoice.
| Where you sell | Starting fee in the calculator (an estimate) |
|---|---|
| eBay, private seller | No selling fee under A$25,000 of sales a year |
| eBay, no shop | 13.4% plus A$0.30 an order, GST included |
| eBay, shop (Pro Starter rate) | 11.44% plus A$0.30 an order; the monthly shop fee is not spread over sales |
| Amazon, you post it or Amazon posts it | 13% referral fee (home and kitchen); 8% for electronics and 10% to 13% for clothing are in the hint. Enter the pick and pack fee yourself |
| Etsy | 6.5% plus A$0.30 an order; payment processing is extra |
| Your own website | 1.75% plus A$0.30 for card processing |
Not worked out here: promoted listing fees, monthly subscriptions spread across your sales, and a target margin. Break-even shows the price that leaves you nothing, so you can add your own margin on top.
These starting rates are estimates and have not been confirmed against the marketplaces' own fee pages. They change, and they vary by category, so the fee boxes stay editable: the percentage on your last invoice is the one that is right for you. Check the marketplace's own fee page before you price.
One sale is easy. Two hundred is the problem.
This works out a single item. What it cannot tell you is which of your products are quietly losing money every week, or that you are down to two of your best seller.
StockRoom keeps cost and sale price against every product, so the margin is worked out once and stays right - and it tells you what has dropped below its minimum before a customer finds out for you.
No card to start. Your first 50 products are free for good.
Why the number is usually worse than people expect
Three things account for almost all of the surprise:
- The fee is charged on postage as well as the item. Offer “free delivery” at A$39.95 and the fee is on A$39.95. Charge A$29.00 plus A$10.95 postage and the fee is on A$39.95 again. The marketplace takes its cut of the whole amount the buyer paid.
- Postage paid is not postage quoted. The label costs what it costs on the day, and a parcel one centimetre over a size band can cost half the profit.
- The tax comes off the top. Registered for GST, one eleventh of what the buyer paid was never yours: A$39.95 carries A$3.63 of it. In the UK, VAT takes a sixth. Sellers who cross the threshold mid-year often keep pricing as though they had not.
Questions people actually ask
Are these fee percentages right for my account?
They are the common defaults, and they are deliberately editable, because marketplace fees change and vary by category, by country and by whether you have a shop subscription. Take the real percentage from your last invoice and type it in - that number is right for you, and no calculator's built-in table can be.
Should I tick the tax box?
Only if you are registered. In Australia that means GST, and the threshold is A$75,000 of turnover in a year; below it you do not charge GST, so ticking the box would show about a tenth less profit than you really make. If you are registered, you can usually claim the GST back on the item and the postage as well - this calculator does not assume that, because it depends on your supplier and on having a valid tax invoice. In the UK the same box is VAT at a sixth of the gross. Selling in the United States, the box is not there at all: the marketplaces collect and remit sales tax themselves, so it is not yours to deduct.
Where do the default fees come from?
They are estimates. We do not have a dated reading of the marketplaces' fee pages saved, so no figure on this page is confirmed, and none should be read as the marketplace's current rate. The fee pages to check are eBay Australia private seller fees, eBay Pro and shop fees and Amazon.com.au pricing. Category rates differ, so the boxes stay editable.
What about returns?
A return usually costs you the outbound postage, the packaging and often the fee, and you may not be able to sell the item again at full price. If one sale in twenty comes back, the honest way to see it is to reduce the profit here by roughly the cost of a return divided by twenty - not by 5% of the price, which is the mistake most people make.
Why is break-even higher than my cost plus postage?
Because the fee is a percentage of whatever you charge, so raising the price to cover costs also raises the fee. Break-even is the price where everything is exactly covered once that circularity is accounted for.
Other free tools
Part of StockRoom - simple stock control for small businesses. Nothing you type here leaves your browser.
StockRoom plans at a glance
StockRoom is free for up to 50 products, then A$9 a month for 400, A$44 for 2,000 and A$89 for unlimited, from the plan list in the app, checked 8 October 2026.
| Plan | Products | Locations | Price a month |
|---|---|---|---|
| Free | Up to 50 | 1 | A$0 |
| Basic | Up to 400 | 1 | A$9 |
| Solo | Up to 2,000 | 5 | A$44 |
| Pro | Unlimited | Unlimited | A$89 |
Your whole team is included on every plan. Prices in Australian dollars. Source: the plan list in the StockRoom app, checked on .