After You Hire a Marketing Agency: The First 90 Days

Choosing a marketing agency gets most of the attention. The first 90 days after you sign get far less, and they decide whether the relationship works. Here is what to set up, hand over and demand, in order.

If you are still deciding whether to hire an agency at all, start with when hiring an agency beats building in-house, and when it doesn’t.

Before day one: make sure you own everything

Every ad account, analytics property, tag manager container and social profile should belong to your business. Add the agency as a user or partner with the access it needs, rather than letting it create accounts in its own name. If the relationship ends, you keep your data, your history and your audiences. Ownership is far harder to arrange later.

Week one: hand over what only you know

An agency can learn your channels quickly. It can’t learn your business without you. In the first week, give it:

• The goal in business terms: revenue, qualified leads, bookings or margin, not clicks or followers
• Your margins and what a customer is worth over time, so it knows what it can afford to pay for one
• What your sales team and customers say: the objections, the questions, the reasons people buy
• What you have already tried, including what failed and why you think it did
• Brand assets, approval rules and one named person who can make decisions quickly

Slow approvals and missing information can stall a promising engagement, and both are in your control.

Month one: demand a diagnosis before a launch

By the end of month one, you should have four things in writing.

A tracking check. Which conversions are firing correctly, which are missing or double-counted, and what needs fixing. Everything later depends on this, because ad platforms optimize toward whatever your tracking tells them.

An honest audit. What in your current accounts, website and content is working, what isn’t, and what the agency recommends you stop. An agency that recommends stopping something is showing you it isn’t only looking for more to do. If you want that baseline before signing anything, a fixed online presence analysis provides it.

An agreed measurement plan. Which numbers count as success, from which system, reported how often. Settle this now, especially if any fee depends on results; how performance-based deals define and pay for results is covered in our complete guide to performance-based agencies.

A 90-day plan built on stated assumptions. What they will test, why, and what result would change their mind.

Days 30 to 90: look for learning, not activity

Progress in this stretch looks like decisions made from data. Tests with written results, including the ones that failed. Budget moved toward what is working and away from what isn’t. Paid campaigns usually show measurable signals sooner than search and content work, which takes longer to build, so judge each channel on its own timeline.

The agency should also raise things you didn’t ask about, such as a landing page that loses visitors. That is what performance marketing managed as one system should feel like from the client side.

Day 90: a real review

Hold a formal review at the end of the first quarter, against the plan from month one. Was tracking fixed? What was learned? What changed because of it? Are the business numbers moving, or is there a clear reason they aren’t yet? Then decide whether to continue, change the scope or stop.

That review only has teeth if the contract allows it, so ask for an initial term with a clear exit point rather than a long lock-in. An agency confident in its work rarely needs one.

The agency you chose matters. What you build together in the first 90 days matters more.

Frequently Asked Questions

How long before a marketing agency shows results?

Expect a diagnosis and a plan within the first month, and early signals from paid campaigns within the first few months once tracking is fixed. Search and content work takes longer to show results. Judge progress at 90 days against the plan agreed in month one, looking at what was learned and changed as well as the business numbers. An agency that can explain its reasoning clearly at that point is usually on the right track.

What should a new marketing agency do in the first 30 days?

It should check your tracking, audit your current accounts, website and content, agree how success will be measured, and write a 90-day plan based on stated assumptions. Be cautious if an agency launches large campaigns before verifying that conversions are tracked correctly, since everything it optimizes afterward depends on that data. Reports full of impressions and reach in month one are another warning sign.

What information should I give a new marketing agency?

Give it your business goal in revenue or lead terms, your margins and customer value, insights from sales and customer conversations, your past campaigns including failures, your brand assets and approval rules, and a named decision-maker. The agency can learn the channels quickly. It cannot learn your business without that information, and the speed of your handover sets the pace for everything that follows.

Who should own the ad accounts when I hire an agency?

Your business should own every ad account, analytics property and social profile. Add the agency as a user or partner with the access it needs. That way you keep your data, campaign history and audiences if the relationship ends, and switching agencies later does not mean starting from zero. Keep a simple list of every account and who has access to it.