Guides

Guides for people who sell.

Plain-English, worked-example guides to the numbers behind a marketplace business: what Amazon and eBay really charge, how a payout reconciles, how VAT and landed cost work, and why the monthly margin flatters you. Written by the people who build Merchvio, not by a content agency.

Fees, thresholds and rates were checked in October 2026 from the marketplaces' and HMRC's public pages. Each guide lists its sources at the end and says when its numbers were last checked.

  1. 5 min readUpdated 14 October 2026

    Amazon UK seller fees in 2026: what you really keep on a £25 sale

    Referral fees, FBA fulfilment by size band, storage, returns, the digital services fee and advertising, worked to the penny on a £25 sale in 2026.

    Read the guide

  2. 6 min readUpdated 14 October 2026

    How to reconcile an Amazon payout to your orders

    Inside an Amazon settlement report, why the payout never equals your sales, and a step-by-step method to match every line to an order, a refund or a fee.

    Read the guide

  3. 5 min readUpdated 14 October 2026

    eBay fees for UK sellers in 2026: final value fee, regulatory operating fee, promoted listings, and a worked example

    Final value fees by category, the per-order fee, the 0.35% regulatory operating fee, Promoted Listings, shops and VAT, worked through a £45 sale.

    Read the guide

  4. 6 min readUpdated 14 October 2026

    VAT for UK marketplace sellers: when the marketplace collects it, when you do, flat-rate vs standard, and what to put in the books

    Who accounts for VAT on Amazon and eBay sales, the £90,000 threshold, VAT on fees, flat-rate versus standard with numbers, and the postings for the books.

    Read the guide

  5. 6 min readUpdated 14 October 2026

    Landed cost: how to price stock so your margin is real (freight, duty, currency, per-unit allocation)

    What a unit really costs once freight, insurance, duty, broker fees, delivery and the exchange rate are in, and how to spread them across a mixed shipment.

    Read the guide

  6. 5 min readUpdated 14 October 2026

    Profit per order vs profit per month: why sellers overestimate their margin by a third

    The monthly view hides returns, ads, storage and losing products: a worked month shows a 35% margin that is really 23%, and why that feels normal.

    Read the guide

Start your free trial

See your real profit this week.

Connect a channel or upload a spreadsheet of orders. 14 days free, no card needed, cancel online at any time.

Start free, no card Take the tour