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How often you should audit your media agency depends entirely on what else is checking delivery through the year. Where nothing is, the audit is the only moment the agreement and reality meet. Where delivery is already assessed at each decision point, a full audit changes character: it becomes something you escalate to rather than schedule. Neither arrangement is wrong. The question is which one fits your situation.
You may be reading this after a period with no independent review, or after a governance request that landed on your desk without a clear answer. Either way, the honest response to the frequency question is not a number. It depends on the situation:
When nothing else is checking delivery
The clearest case for a media audit is when no independent view of delivery exists through the year. No systematic comparison of what was agreed against what was placed, no third-party assessment of pricing, no structured review of how the agency relationship is performing against the original brief.
In that arrangement, the media audit is the only independent instrument that brings the agreement and reality together in the same room. Post-campaign reporting does that too, but it is produced by the party being assessed, which is a different thing. The first priority, then, is not a question about frequency: it is a question of establishing where things stand. Once that baseline exists, what comes next depends on what it surfaces.
If the findings are minor and the relationship is sound, a longer interval before the next examination is entirely reasonable. If the findings point to patterns worth monitoring, a shorter rhythm may follow. The first audit creates the evidence that makes the frequency question answerable. Before it, the answer is largely a guess.
For an advertiser unsure whether a full examination is warranted, a fixed-fee diagnostic reads what already exists and returns a clear picture of probabilities, plus a yardstick both parties can sign off on. That diagnostic fee is credited in full if a full audit follows. It is a way of answering the frequency question with evidence rather than a rule. You can learn more about how that works in practice.
When delivery is already being assessed
The picture changes when delivery is assessed against the agreement at each meaningful decision point through the year, through structured reporting at fixed moments, or through ongoing vendor management that keeps the relationship legible across the year.
In that arrangement, most of what a periodic examination would surface has already come up, close enough to the moment that something could still be done about it. A full audit in this context becomes an escalation instrument: the tool you reach for when something needs a deeper look, not a scheduled event. What such a continuous arrangement involves in practice is set out under vendor management.
That is a considered position, not a way of avoiding scrutiny. But the difference between a governance arrangement that genuinely covers delivery and one that produces reports without independent verification matters here. An advertiser in the second situation is closer to the first than they may realise. Understanding what a media audit is and what it costs is useful context before deciding which category applies to you.
Fixed rhythms are real and legitimate
Many organisations audit on a set cycle as a matter of corporate policy, annually, half-yearly, every two years, often defined by scope and budget threshold. Some are required to by governance frameworks or by contract. That is a sound way to run oversight, and audit arrangements can be structured on a subscription basis to match a defined cycle.
The trade-off is worth stating plainly. A periodic examination looks back at a period that has already closed. What it finds can be corrected going forward, but the period it examined cannot be reclaimed. That is not an argument against fixed rhythms, it is simply the nature of retrospective review, and most advertisers who audit on a set cycle understand this and plan accordingly.
The parallel with pitch cadence is worth a brief note. Pitching every year rarely serves an advertiser well: an agency has little reason to invest in a relationship it may not keep. A considered rhythm tends to produce better results than an annual reflex. The same logic applies to examination. The goal is a rhythm that fits the situation, not the highest possible frequency. The pitch cadence question itself belongs to media agency selection, the point here is simply that the same underlying logic applies.
Occasions that prompt an audit regardless of cycle
Beyond scheduled reviews and the two-situation framework above, certain moments make an independent examination worth considering on their own terms, regardless of when the last one took place.
An agency transition is one. A significant shift in budget or strategy is another, particularly where the new direction involves channels or buying methods that were not part of the previous agreement. A change in the people running the account on either side, whether at the agency or internally, creates a natural moment to establish a shared baseline for what has been in place. A contract renewal or renegotiation is a third, and a practical one: without an independent picture of what was delivered, the advertiser negotiates on the counterparty’s account of it. A structural shift in the media mix is a fourth - where a substantial share of the budget moves to a buying method that was not part of the original arrangement, the definitions and the checks that covered the old mix no longer cover the new one. A governance or stakeholder request for assurance is a fifth, often because something has raised a question that internal reporting cannot answer on its own. And the simple absence of any independent examination in recent years is itself a reason: not because something is necessarily wrong, but because the absence of a check is its own kind of finding.
For advertisers active across multiple markets, it is worth noting that media market structure varies significantly by region. The media landscape in Southeast Asia, for instance, operates under very different dynamics than Western markets, a factor that can affect both what an audit looks for and what it finds. A financial or performance audit may also surface different things depending on the market, and clarifying which question you are asking before you begin helps define the right scope.
An audit that finds nothing is a valid outcome. It establishes that the agreement has been met and provides a documented basis for the next cycle. That result has value. Not every examination needs to surface a finding to justify the examination.
The frequency question, then, does not have a universal answer. What it has is a logic: understand what else is in place, identify the occasions that matter regardless of cycle, and choose a rhythm that fits the situation rather than one borrowed from another organisation’s governance calendar.
Frequently asked questions
How often should a media audit be carried out? It depends on what else is in place. Where nothing is checking delivery through the year, the first examination establishes where things stand; subsequent timing follows from what it finds. Where delivery is already assessed at each decision point through structured vendor management, a full audit becomes something you escalate to rather than schedule on a fixed cycle. Fixed intervals set by corporate policy are a legitimate approach, with the honest trade-off that they look back at a period that has already closed.
How often should an audit be done? There is no single interval that applies across organisations. The right rhythm depends on what governance is already in place, the scale and complexity of the media spend, whether the agency relationship has changed, and whether any specific occasion, a transition, a budget shift, a stakeholder request, makes an independent review timely regardless of when the last one was.
How often should a company get audited? For media specifically, the answer depends more on circumstances than on a calendar. Companies with robust ongoing oversight may audit less frequently because most issues surface at the moments where something can still be done about them. Companies with no independent view of delivery through the year have a stronger case for a shorter interval, because the audit is currently the only moment the agreement and reality meet.
What occasions prompt a media audit outside of a regular cycle? An agency transition, a significant change in budget or strategy, a change in the people running the account, a governance or stakeholder request for assurance, and the simple absence of any independent examination in recent years. Each of these creates a reason to examine delivery independently, regardless of when the last audit took place or when the next scheduled one is due.
