The best predictor of a successful agency relationship is not the pitch deck; it is the quality of the conversation before you sign. Agencies are practised at presenting well, so the buyer's job is to ask questions that pitches are not designed to answer: who will actually do the work, how results will be measured, what happens when things go wrong, and how easily you can leave. Here are ten questions that separate agencies with substance from agencies with polish, along with what a good answer sounds like and the warning signs to listen for.
Ask to meet the people who will do the work, not just the directors who sell it. A common industry pattern is that senior people pitch and junior people deliver. A good answer names specific individuals, describes their experience and lets you speak with them. A warning sign is vagueness ("we work as a team") or a refusal to introduce the delivery staff before signing.
You are not looking for identical clients, but for pattern familiarity: similar sales cycles, similar deal sizes, similar audiences. B2B and B2C marketing are different disciplines, and an agency brilliant at retail social media may flounder with an 18-month enterprise sales cycle. A good answer includes named case studies with numbers and, ideally, a client you can call. A warning sign is logos on a slide with no detail behind them.
The answer reveals whether the agency thinks in business outcomes or activity. Good answers talk about qualified enquiries, pipeline contribution and cost per opportunity, and propose agreeing the metrics with you before work starts. Warning signs are dashboards full of impressions, reach and engagement with no line to revenue, or a promise of results that sounds implausibly fast for B2B.
This is a test of honesty. B2B marketing typically takes six to eighteen months to show its full effect, and an agency that promises page-one rankings or a flood of leads in month two is either inexperienced or telling you what you want to hear. A good answer is staged: early months show leading indicators (rankings, traffic, engagement quality), later months show enquiries and pipeline. Beware anyone guaranteeing outcomes they do not control.
Strong agencies have clear demands: access to subject-matter experts, timely feedback, sales data, a decision-maker who turns up to meetings. Marketing built without client input is generic, and generic B2B content fails. If an agency says "nothing, we'll handle everything", they are describing work that will read like it was written by outsiders, because it will be.
You should own your website, domain, Google Ads account, analytics, social profiles and all creative produced for you, with the agency operating as an invited user. This is one of the most common and most painful traps: agencies that hold accounts hostage make leaving expensive. Get ownership written into the contract. Any hesitation on this question is a serious red flag.
Ask for the fee, the deliverables, what counts as extra, and how ad spend is handled (some agencies charge a percentage of media spend, which creates an incentive to increase it). NZ retainers for B2B work commonly run from around $3,000 to $15,000+ per month depending on scope. A good answer is itemised and explains the reasoning. A warning sign is a suspiciously low price, which usually means templated work, offshore delivery without oversight, or upsells later.
In 2026 this question is essential. Good answers are specific and unembarrassed: AI for research, drafting and analysis, with human strategy, editing and fact-checking on everything that ships, and transparency about which is which. Warning signs run in both directions: agencies that claim not to use AI at all (they are either behind or not being straight with you) and agencies whose output is plainly unedited AI content sold at human prices.
Every agency loses clients. An honest answer ("we lost a client last year because we under-resourced the account during a staff change; here's what we changed") tells you the agency reflects and improves. Deflection ("clients only leave when their budgets get cut") tells you how they will handle your relationship when problems appear, and problems always appear.
Ask about notice periods, contract length, and what happens to work in progress and assets if you part ways. Reasonable answers are 30 to 60 days' notice after an initial term of three to six months. Twelve-month lock-ins with automatic renewal and 90-day notice windows benefit exactly one party. Confidence in exit terms is itself a signal: agencies that make leaving easy expect you to stay because the work is good.
How many agencies should we speak to? Two or three seriously. Fewer gives you no comparison; more turns the process into a beauty parade that rewards pitching skill over delivery skill.
Should we run a paid trial project first? Where practical, yes. A small, paid, defined project (an audit, a strategy, one campaign) reveals more about working style and quality than any number of pitch meetings.
Is a specialist B2B agency always better than a generalist? Not always, but the burden of proof is on the generalist. Ask question 2 and judge the evidence, not the claim.
What single answer matters most? Ownership (question 6). Every other problem is fixable; losing access to your own accounts and data is the one that hurts for years.