Comparing paid-social agency pricing models on one identical scope

What to take away

Comparison method

The review closed on 5 September 2026 for a buyer operating in England. Every option below is measured against one identical scope: an ecommerce advertiser spending £30,000 a month on Meta and TikTok, four always-on campaigns, 12 creative variations a month, monthly reporting and a 12-month term.

Four structures were compared on the same questions: covered work, fee unit, media payer, spend dependence, change route, incentives and conflicts, evidence needed, renewal, cancellation and exit.

Supplier names are public and verifiable, but rates move with scope and volume, so fees are shown as typical ranges. Tax assumptions and performance claims do not. No agency funded the comparison, and this article deliberately does not rank the four structures or recommend one.

Agency-side teams such as Brainlabs (London), Croud (Shrewsbury) and Journey Further (Leeds) quote against a scope rather than a public rate card. Jellyfish (London), The Social Shepherd (Bath) and Impression (Nottingham) work the same way.

Each row pairs the pattern with providers that use it. A proposal can combine two patterns. Compare the resulting cash and work under the same project scenario rather than setting a percentage against a monthly figure in isolation.

Expose every flow of money

Ask who contracts with the platform and who owns the billing profile. Record commissions, referral income, rebates, credits and media paid on the client's behalf. State whether each is retained, passed through or netted against an invoice. The buyer should reconcile platform records, agency invoices and bank payments without double counting.

Media bought through Meta or TikTok appears on the platform's own statement, whether the agency pays or the buyer does. A percentage model usually charges on that figure, so the billing route moves the fee base.

HMRC's invoice requirements cover the supplier, service description, dates, amounts and VAT where applicable. Do not assume VAT status or recovery. Capture exact currency, tax presentation, billing unit and period from the project documents and route them to finance or tax review.

Test price and scope together

Apply one blank scenario to every option:

Scenario cash = base fee + approved units + media-linked fee + outcome-linked fee + pass-through costs + applicable VAT + exit cost

Each term needs a quoted source and a quantity. Leave it unknown if the supplier has not supplied one. A headline price cannot be assessed while creative, accessibility, privacy review, correction or data export sits outside scope.

A retainer at £3,000 a month costs the same £36,000 with no link to spend. Four contractor days a month at a typical £600 to £900 a day lands between £28,800 and £43,200 a year.

An outcome-linked or hybrid deal with a £1,500 to £3,000 monthly base costs £18,000 to £36,000 a year before any bonus. For this scenario, if the bonus equals 10% of media, that adds £3,000 a month or £36,000 a year, so the total is £54,000 to £72,000 before pass-through costs.

Media of £360,000 a year sits outside every fee, so the fee is typically 5% to 15% of total cost on this scope.

Stress-test the mechanism with three project events: the media ceiling changes, a creative batch needs another review, and delivery stops before renewal. Use only quantities approved for the buyer's scenario.

The exercise should reveal which clause changes payment, who authorises it, and whether the same work is counted twice. A contract test, not a forecast that any event will occur.

CAP's misleading advertising rules address price statements, qualifications and substantiation in UK marketing communications. They do not settle a private business contract, but they reinforce the need to present non-optional charges and conditions clearly where a price is advertised.

Choose a mechanism the team can govern

Write approval thresholds for extra units, spend changes and scope changes. Define the evidence that triggers any outcome payment. Set renewal notice, price-review, suspension, cancellation and handover terms. The Small Business Commissioner's contract guide is a useful UK checklist for scope and payment discussions, not model wording.

Keep advertising, regulated-product, privacy or PECR, security and accessibility acceptance outside the commercial score. The cheapest calculated mechanism still fails if the engagement cannot lawfully or safely proceed.

Record the selected structure, rejected alternatives, unresolved unknowns and the date for rechecking the signed scope. Note which named provider gave the quote, the rate unit and the day it was issued, because both move with scope.

Before you act

Common questions

What must be fixed before total cost can be compared?

The buyer must fix an identical service scope, unit volume and contract period. Each structure then needs its own terms settled: deliverables and revision limits for a fixed retainer, the eligible spend base for a percentage deal, and the trigger event for an outcome payment.

How should a buyer test a pricing mechanism before signing?

Apply one blank scenario to every option, with each term quoted and quantified.

What should be recorded at the end of the comparison?

Record the selected structure, the named provider, the rejected alternatives, any unresolved unknowns and the date for rechecking the signed scope.