Seller guides
Fees, VAT and pricing explained in plain English — and every worked example is computed by the live calculation engine, never typed in by a copywriter.
eBay profit calculator (UK)
Final value fees by category, the per-order fee and the regulatory fee — what a sale really nets you.
Read the guide →Shopify profit calculator
Processing rates by plan, the fixed per-transaction fee, and honest per-order profit.
Read the guide →VAT profit calculator
The identical sale computed registered vs not — and why VAT is cashflow, not cost.
Read the guide →Profit margin vs markup
Two different denominators, two different decisions. Confusing them is expensive.
Read the guide →eBay Promoted Listings
What an ad rate really does to a margin that fees have already squeezed.
Read the guide →Selling price calculator
Work backwards from a target margin when fees scale with the price itself.
Read the guide →