Switching agencies often feels riskier than staying with a poor fit – from fear of the effort and of losing data and history. Yet a clean switch is manageable if you watch a few things. The most important point up front: your ad accounts must belong to you. This guide shows the warning signs, the right questions for a new agency, and the checklist for the move.
In brief
- Your ad accounts (Google Ads, GA4, Meta) must belong to you – not the agency.
- Warning signs: no transparency, no clear numbers, activity instead of results.
- Ask a new agency about measurement, account access and reporting, not just price.
- A clean switch preserves the accounts’ history and learning data.
- No lock-in: contracts, access and data should always sit with you.
The warning signs
Not every frustration justifies a switch – but these signs do:
- No transparency: you get no or only limited access to your own accounts.
- Numbers with no link to the business: reports full of clicks and impressions but no enquiries, cost per customer or revenue.
- Activity instead of results: lots of “we optimised”, little measurable progress.
- Poor availability and changing contacts.
- No tracking: nobody can say which campaign actually brings customers.
The key point: you must own the accounts
The biggest avoidable mistake is letting the agency create accounts in its own name. Google Ads, Google Analytics (GA4), Google Tag Manager and the Meta ad account should run under your organisation; the agency gets access, not ownership. That way, on a switch, you keep the whole history, the automation’s learning data and the conversions – and need not start from zero. Check this even before you consider switching.
The right questions for a new agency
- Do the accounts run in my name, and do I have full access at all times?
- How do you measure success – by clicks or by enquiries, cost per customer and revenue?
- What does reporting look like, and how often do we discuss the numbers?
- What happens to accounts and data if we end the relationship?
- What is the contract term and notice period?
A credible agency answers these questions clearly and without evasion.
Checklist for a clean move
- Check ownership: do all accounts run under your organisation? If not, transfer them first.
- Secure access: admin rights to Google Ads, GA4, Tag Manager, Merchant Center and Meta.
- Preserve history: delete nothing – the old campaign and conversion history is valuable.
- Document the handover: tracking setup, running campaigns, targets, access.
- Overlap cleanly: give the new agency access before the old one is switched off.
Switching without data loss
If the accounts belong to you, the switch is mainly a question of rights and handover – not a rebuild. The new agency builds on the existing history and learning data instead of repeating the expensive learning phase. So you lose neither time nor performance. The real effort is in a good handover, not the technical move.
Frequently asked questions
When should I change agency?
When transparency, measurable results or availability are missing – especially when nobody can say which campaign actually brings customers.
Will I lose my data when switching?
Only if the accounts belong to the agency. If they run in your name, you keep history and learning data in full.
Who should own my ad accounts?
Always you. Google Ads, GA4, Tag Manager and the Meta account should run under your organisation; the agency only gets access.
What do I ask a new agency?
About account ownership and access, success measurement, reporting, data handover at the end, and contract term – not just price.
How long does a switch take?
If the accounts belong to you, it is mainly rights and handover – usually days, not months, with no new learning phase.
Do I have to start from zero?
No, if the history is preserved. A good new agency builds on it rather than rebuilding everything.
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