Insights on Mr. Prime

What is ACoS? How to work out your break-even ACoS on Amazon

Wed, 30 Sep 2026 00:00:00 +0000

Most Amazon advertising reports answer the question “how efficient were my ads?” A founder needs the answer to a different one: “did advertising leave the business with more money than it started with?” The two can point in opposite directions. This guide shows how to get from the first to the second, using figures you already have in Seller Central.

What ACoS, ROAS and TACoS measure

Three ratios do most of the work, and one more number, your break-even, tells you how to read them.

Amazon selling fees UK: every fee, and what a £20 sale really leaves you

Thu, 01 Oct 2026 00:00:00 +0000

Most sellers can quote their referral fee. Far fewer can say what a single sale leaves them once VAT, fulfilment, storage, returns and advertising have all been taken. This guide does both. It lists every fee a UK seller pays, with the rate and the date it took effect, and then follows one £20 sale all the way to profit. For the fulfilment and storage tables in full, see our companion guide to Amazon FBA fees in the UK.

Amazon FBA fees UK: fulfilment, storage, peak and low-price FBA explained

Thu, 01 Oct 2026 00:00:00 +0000

Amazon’s FBA fee is often as large as its referral fee, and it varies far more from product to product. Two items at the same price can pay very different fees because one is 100 g heavier or 2 cm thicker. This guide covers the fulfilment and storage detail behind our overview of Amazon selling fees in the UK, which follows a full £20 sale from price to profit.

All rates below are for UK local FBA, excluding VAT, and were checked on Seller Central UK on 1 October 2026. Amazon’s Europe rate card in force is dated 1 July 2026¹³.

Selling on Amazon UK: a guide for established brands

Thu, 01 Oct 2026 00:00:00 +0000

Most guides to selling on Amazon UK are written for someone starting a business. This one is for a brand that already has one: products, a supply chain, customers through retailers or its own website, and a finance director who wants to know whether Amazon will add profit or just turnover. We bring the pieces that decide that answer into one model, from fees and fulfilment to advertising, channel conflict and the choice between Vendor and Seller, and link to our detailed guide on each. If you only want the fee tables, start with Amazon selling fees in the UK.

Amazon advertising UK: the ad types, what they cost and how to make them profitable

Thu, 01 Oct 2026 00:00:00 +0000

Amazon advertising is the fastest way to put a product in front of UK shoppers who are already searching for it. It is also the fastest way to turn a profitable product into a loss-making one. The difference is rarely the ad type you choose. It is whether you measure each one on the profit it adds to the business, or on the sales Amazon credits to it.

This guide is the hub for our advertising guides. It covers what you can buy on Amazon.co.uk today, what it costs, and how we decide whether each ad type deserves its budget. The detail lives in the linked guides: Sponsored Products, Brands and display formats, campaign structure and bids, negative keywords, advertising at portfolio scale and DSP, and measurement with Amazon Marketing Cloud.

Amazon PPC strategy: structure, bids and budgets built around profit

Wed, 30 Sep 2026 00:00:00 +0000

What Amazon PPC is

Amazon PPC (pay-per-click) is advertising on Amazon where you bid for ad placements and pay only when a shopper clicks. The core format, Sponsored Products, promotes individual listings at the top of, alongside or within shopping results and on product pages; there are no monthly or upfront fees, you set a daily budget, and you bid the most you are willing to pay for a click¹. The more competitive the bid, the more likely the ad is to show when it matches a shopper’s search¹. To advertise, a product must be in an eligible category and be eligible for the Featured Offer¹, which our guide to the Amazon Buy Box explains.

Amazon agency UK: what agencies do and how to choose one

Thu, 01 Oct 2026 00:00:00 +0000

Search for an Amazon marketing agency in the UK and you will find hundreds of firms saying much the same thing. Mr. Prime is one of them, so read this guide with that in mind. We have written it the way we would want any founder to approach any agency, including us: work out what you need done, find out who can actually do it, and check every claim against Amazon’s own records before you give anyone access to your account.

Amazon agency pricing: what UK brands pay and how to test the fee

Wed, 30 Sep 2026 00:00:00 +0000

Every guide to agency pricing is written by someone with a price to defend, and this one is no exception: Mr. Prime is an Amazon agency. So here is the deal we are offering. We will not quote our own fees on this page, we will show you the models we think are weaker alongside the ones we prefer, and we will give you the sum we would want any founder to run on any quote, including ours.

Amazon SEO: how Amazon ranks products, and what you can actually influence

Thu, 01 Oct 2026 00:00:00 +0000

Amazon SEO, search engine optimisation for Amazon, is a grand name for a simple idea. A shopper types a search, Amazon decides which products to show and in what order, and you want yours near the top for the searches that lead to sales. Most of what is written about it is either too vague to act on or more precise than anything Amazon has published.

This guide is the hub for our listings and search guides. It explains how ranking works, as far as Amazon has documented it, and how to judge it on profit. Three companion guides go deeper: Amazon keyword research covers finding and choosing search terms, Amazon backend search terms covers the hidden keyword field, and Amazon listing optimisation covers the page itself: title, item highlights, bullets, images and A+.

Amazon listing optimisation: 75-character titles, item highlights and bullets that convert

Wed, 30 Sep 2026 00:00:00 +0000

An Amazon product sells when two things happen: enough shoppers reach the page, and enough of those who arrive decide to buy. Advertising and ranking bring the first. The listing does most of the work on the second, and it also decides whether a shopper clicks on your result at all.

Where listing work shows up

Sales = sessions × conversion × average selling price

Sessions are visits to the product page in a 24-hour period. Conversion here is Amazon’s Unit Session Percentage: units ordered ÷ sessions.

What is Amazon FBA? How it works in the UK, what it costs and when it pays

Thu, 01 Oct 2026 00:00:00 +0000

Fulfilment by Amazon is usually explained to people starting a side business. This guide is for a different reader: a brand that already sells, already has a warehouse or a 3PL, and wants to know whether handing fulfilment to Amazon will leave it with more profit or less. For the detail on each step, read our guides to FBA prep and labelling and sending stock with Send to Amazon; for current rates, the UK FBA fees guide.

How to sell on TikTok Shop UK: a step-by-step guide for brands (2026)

Fri, 02 Oct 2026 00:00:00 +0000

TikTok Shop puts a checkout inside the videos, LIVEs and search results people already use on TikTok. For a brand, that means two jobs at once: running a marketplace shop, with its own rules, limits and fees, and keeping a steady flow of content, most of it made by creators you pay per sale. This guide covers both, in the order you will meet them, using TikTok Shop UK’s own policies. For the money side in detail, see TikTok Shop fees in the UK; if you are deciding between channels, start with TikTok Shop vs Amazon.

What is a good TACoS on Amazon? How to set your own ceiling

Wed, 30 Sep 2026 00:00:00 +0000

“What is a good TACoS?” is one of the questions we hear most from founders, usually followed by “and what’s everyone else running at?” The second question is the less useful one. Two brands in the same category can both be well run at TACoS figures several points apart, because they have different margins, are at different stages and get different shares of their sales without an ad. This guide shows how to set a TACoS ceiling for your own brand and how to read the trend against it.

TikTok Shop vs Amazon: which channel should a UK brand start with?

Wed, 30 Sep 2026 00:00:00 +0000

“TikTok Shop or Amazon?” sounds like a choice between two marketplaces. It is really a choice between two kinds of shopper. One arrives on Amazon already looking for something like your product. The other is scrolling TikTok and had no plan to buy anything until a video changed their mind. Mr. Prime runs accounts on both, so this guide compares them on the things that decide profit for a UK brand: demand, fees, content, fulfilment, returns and cash flow. If you have already chosen TikTok, start with our guide to how to sell on TikTok Shop in the UK.

TikTok Shop fees UK (2026): commission, shipping, creators and what you keep

Fri, 02 Oct 2026 00:00:00 +0000

TikTok Shop’s fee is easy to quote and easy to misread. The platform takes 9% of an order. Everything else a TikTok order costs, from the creator who sold it to the parcel it went out in, is a cost you set or choose, and none of it appears next to the commission in Seller Center. This guide takes each line in turn, using TikTok Shop UK’s own pages, then adds them up for one order. It is part of our guide to selling on TikTok Shop in the UK; to run your own numbers, use the TikTok Shop fee calculator.

Amazon keyword research: how to find the searches worth paying for

Thu, 01 Oct 2026 00:00:00 +0000

Most Amazon keyword research starts and ends with search volume: find the biggest searches and get the product in front of them. It is an understandable instinct and an expensive one. The biggest searches tend to be the broadest, the most contested and the least likely to convert for any one product, so they cost the most to win and return the least when you do.

This guide is part of our Amazon SEO series, which explains how Amazon ranks products. Here we cover the step before: which searches to aim for. We start with the data Amazon gives you, then the third-party tools, then the method we use to rank every term by the profit it can bring. Where those terms go once you have chosen them is covered in our guides to listing optimisation and backend search terms.

Amazon Rufus, now Alexa for Shopping: how to optimise your listings for AI search

Wed, 30 Sep 2026 00:00:00 +0000

A growing share of Amazon shoppers no longer type a keyword and scroll. They ask a question, such as “which of these is quietest?” or “will this fit a small kitchen?”, and an AI assistant answers it using what your listing, your reviews and the wider web say about your product. In the UK that assistant is still called Rufus. In the US, since May 2026, it is part of Alexa for Shopping.

Amazon PPC management: in-house, agency, freelancer or software?

Thu, 01 Oct 2026 00:00:00 +0000

There are four ways to run Amazon advertising: hire someone, pay an agency, use a freelancer, or lean on software. Mr. Prime sells the second, so we have tried hard to be fair to the other three. Each can work. Each also fails in a predictable way, and the right choice depends far more on the size and shape of your account than on any general rule.

What an Amazon PPC specialist does

An Amazon PPC specialist sets up, runs and measures your Amazon advertising so that it adds profit: choosing which products to advertise, building the campaigns, setting bids and budgets, mining search terms and reporting what the ads added to total sales. Whether that person is an employee, a freelancer or someone at an agency, the job is the same, and it needs more than a feel for bids. In the accounts we manage, these are the skills that separate profitable PPC from busy PPC:

FBA vs FBM: which is more profitable, SKU by SKU?

Thu, 01 Oct 2026 00:00:00 +0000

“Should we use FBA or ship it ourselves?” is one of the first questions a brand asks about Amazon, and it is usually asked about the whole business. That is the wrong unit. FBA’s fees are set by each product’s size, weight and how long it sits in a warehouse, and your own costs vary the same way, so the right answer often differs between two products in the same range. This guide gives you the per-unit sum, runs it on four example products and turns the results into a decision table. For how FBA works, read what Amazon FBA is and when it pays; for every fee tier, our Amazon FBA fees UK guide.

Insights on Mr. Prime

What is ACoS? How to work out your break-even ACoS on Amazon

What ACoS, ROAS and TACoS measure

Amazon selling fees UK: every fee, and what a £20 sale really leaves you

Amazon FBA fees UK: fulfilment, storage, peak and low-price FBA explained

Selling on Amazon UK: a guide for established brands

Amazon advertising UK: the ad types, what they cost and how to make them profitable

Amazon PPC strategy: structure, bids and budgets built around profit

What Amazon PPC is

Amazon agency UK: what agencies do and how to choose one

Amazon agency pricing: what UK brands pay and how to test the fee

Amazon SEO: how Amazon ranks products, and what you can actually influence

Amazon listing optimisation: 75-character titles, item highlights and bullets that convert

What is Amazon FBA? How it works in the UK, what it costs and when it pays

How to sell on TikTok Shop UK: a step-by-step guide for brands (2026)

What is a good TACoS on Amazon? How to set your own ceiling

TikTok Shop vs Amazon: which channel should a UK brand start with?

TikTok Shop fees UK (2026): commission, shipping, creators and what you keep

Amazon keyword research: how to find the searches worth paying for

Sponsored Products, Sponsored Brands and Sponsored Display: what each Amazon ad does and when it pays

Amazon Rufus, now Alexa for Shopping: how to optimise your listings for AI search

Amazon PPC management: in-house, agency, freelancer or software?

What an Amazon PPC specialist does

FBA vs FBM: which is more profitable, SKU by SKU?