
Strategy & Craft
Splitting an ad budget: the 70-20-10 rule
Seventy per cent on what works, twenty on scaling, ten on experiments. The rule is old, simple, and violated in almost every account.
Strategy & Craft
Portfolios are curated and chemistry misleads. Six checks that predict the working relationship better than any pitch.

Agency selection is usually decided by the pitch, which measures the ability to pitch. Six checks measure the ability to deliver.
The people in the pitch are frequently not the people on the account. Ask directly: who will write, who will design, who is the day-to-day contact, and what else are they working on.
Ask to meet them before signing. An agency that resists this is telling you something.
Ask for one engagement that did not work and what changed as a result. The answer separates two kinds of agency.
An agency with no failures either has no history or is not being honest. One that describes a failure specifically, including its own part in it, has a working process for learning.
Ask for three client references and pick which ones you call. A curated list of two is a curated list.
Ask referees three questions: what surprised you, what would you do differently, and would you hire them again for the same work.
| Situation | Assessment |
|---|---|
| Deep experience in your sector | fast start, risk of formula |
| Experience in adjacent sectors | usually the best balance |
| No sector experience | fresh view, longer run-up |
| Currently working for a direct competitor | conflict, ask how it is handled |
Sector experience is overvalued. Understanding of your customer matters more, and that can be learned in a fortnight by anyone who bothers.
Present a deliberately weak idea of your own in the meeting and see what happens. An agency that agrees with everything the client says will produce work that is the average of your internal opinions.
You are buying judgement. If the judgement never contradicts you, you are paying for production.
Read four clauses before anything else: who owns the work and the source files; notice period, where three months is normal and twelve is a trap; whether media commission is charged and at what rate; and what happens to accounts, data and access if the relationship ends.
The last point is the one that hurts. Agencies that hold your advertising accounts, your domain or your analytics in their own name create an exit cost that has nothing to do with the work.
For substantial budgets, pay for the pitch. Three agencies at £2,000 each buys three considered proposals rather than three recycled decks.
For large budgets yes, paid. Unpaid pitches attract agencies with spare capacity, which is rarely a good sign.
Retainer for continuous work, project fee for defined deliverables. Commission on media spend creates an incentive to spend more.
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