The decision to leave an agency is usually the easy part — you’ve already made peace with it by the time you’re reading something like this. What actually goes wrong is the handover itself: rankings that mysteriously dip after the switch, ad accounts that stop tracking conversions overnight, or a scramble to find login details nobody wrote down. None of that is inevitable. It happens when the exit is treated as an afterthought rather than a project with its own checklist.
Check your contract before you say anything
Before any conversation with the agency, re-read your contract for the notice period and any early-termination costs. Most rolling retainers need 30 to 60 days’ notice; some fixed-term contracts include an exit fee for leaving before the term ends. Knowing this before you speak to them means you’re negotiating from a position of knowing exactly what you owe, rather than finding out mid-conversation.
Work out what you actually own before you leave
This is the step that prevents almost every horror story about switching agencies. Make a list of every account involved in your marketing — Google Ads, Google Analytics, Google Business Profile, your website’s hosting and domain, your CMS, your email marketing platform, your social media pages, any SEO or ad tracking tools — and check who has ownership versus who merely has access.
If any of these were set up by the agency under their own management structure rather than under an account you control, that’s the one to sort out first, because it’s the one most likely to cause a problem. The clearest sign of trouble: if you can’t log into an account right now without asking the agency for a password, you don’t currently own it.
Pay particular attention to conversion tracking on Google Ads. If the outgoing agency has been running a shared conversion tag across their client accounts (a common setup for efficiency on their end), that tag stops recording once the account link between you and their manager account is severed — quietly, with no error message. Your historical campaign data survives the switch; your ability to measure new conversions doesn’t, unless someone rebuilds the tracking before or immediately after the transition. Ask specifically about this before you cut the link.
Give notice in writing, and be specific about what you need back
Once you’ve mapped the accounts, send formal notice in writing (email is fine, but keep it as a dated record) referencing your contract’s notice period. In the same message, list exactly what you expect as part of the handover: transfer of ownership on every account you don’t currently control, a full export of your data and reports in a format you can actually open, and a named point of contact for the transition period.
Reputable agencies handle this routinely and won’t be offended by a clear list — it’s normal practice, not an accusation. If a request this reasonable gets stonewalled or delayed without explanation, that’s useful information in itself.
What a proper handover should include
A thorough offboarding covers several categories, and it’s worth checking each one off explicitly rather than assuming it’s been done:
Account ownership transfers for every platform involved — domains, analytics, ad accounts, social profiles, hosting, and any repositories or design files, with you confirming you actually have admin access and a working recovery method before any agency access is revoked.
A full asset handover — source files, final creative, historical reports, and any documentation needed to understand what’s been done and why, not just what’s currently live.
Data exported in a format you can open without needing the agency’s specific tools, along with a final performance report covering the measurement period and any known limitations in the data.
Closure of anything the agency was funding or managing on your behalf that shouldn’t continue after the split — ad spend commitments, any subscriptions billed through them, phone numbers or tracking lines set up under their account.
A written sign-off from both sides once everything above is confirmed complete, so there’s no ambiguity later about what was and wasn’t handed over.
Plan for this to take one to four weeks depending on how much is involved — a simple single-channel retainer can wrap up quickly; a full-service relationship spanning SEO, ads, website, and email will reasonably take longer to unwind properly.
Timing the switch to protect your rankings and campaigns
Where possible, avoid a hard cutover with no overlap, particularly for SEO. A short overlap period — even just having the outgoing agency confirm nothing changes on the live site until the new arrangement is fully in place — reduces the risk of technical issues (a broken redirect, a removed meta tag, a paused campaign) slipping through in the gap between one agency stopping and the next one starting. If you’re moving straight to an in-house setup rather than a new agency, make sure someone on your side is specifically responsible for monitoring rankings and ad performance for the first few weeks after the switch, since that’s when problems from an incomplete handover tend to surface.
Keep the conversation professional
However the relationship has gone, a calm, specific, written exit request tends to get a smoother handover than one that starts as a confrontation. You may well want a reference, a case study permission, or simply to avoid burning a bridge in a small industry. State plainly what you need, by when, and let the paperwork do the rest.
Frequently asked questions
How much notice do I need to give to leave my marketing agency?
Check your contract — it’s typically 30 to 60 days on a rolling retainer, though fixed-term contracts can differ. Confirm this before you say anything to the agency so you know exactly what you’re working with.
Will I lose my Google rankings if I switch marketing agencies?
Not if the handover is done properly and nothing changes on your live site during the transition. Most ranking drops after a switch come from technical mistakes during the handover — a broken redirect or removed tag — rather than the switch itself.
What if my agency won’t hand over my accounts?
Put your request in writing, reference the specific accounts by name, and note that they should be under your ownership regardless of who set them up. If they still refuse, this is worth raising formally, as reasonable account transfer requests are standard practice across the industry.
If you’re partway through an agency switch and want a second opinion on whether your handover checklist is complete, Ecloudic is happy to take a look.