Attribution refund windows expire quietly: Refund windows are missed by drift rather than decision. Three ways evaluations quietly overrun, and the two-line calendar habit that prevents each of them.
Read the full article below for detailed insights and actionable strategies.
The attribution problem
One sale. Four channels. 400% credit claimed.
Reported revenue: €400 · Actual revenue: €100 · Gap: €300
Refund windows lapse through drift, not decision, and the vendor has no reason to remind you. Three patterns account for almost all of it.
The three drifts
| Drift | How it happens | Cost |
|---|---|---|
| Waiting for the right data | "We will evaluate properly after month end" | The window closes before month end does |
| Waiting for the right person | The one who can judge it is on holiday | Two weeks of a four-week window |
| Waiting for the integration | Somebody decides to build the pipe first | The whole window |
The third is the most expensive and the most common. Building an integration before deciding whether the tool is any good consumes the evaluation period and creates a sunk cost that biases the eventual decision.
The calendar habit
Two lines, entered on day one. The last day of the window, and a reminder three days before with the words "decide or request". That is it. It sounds trivial and it prevents all three drifts, because each of them is a failure to have a date rather than a failure of judgement.
What to evaluate if time is already short
If half the window is gone, run the two checks that need the least setup. Point the tool at a past period where you already know what happened, and point it at a channel too small to measure. The first tests whether the method reproduces something true; the second tests whether it admits its limits.
Both fit in an afternoon and together they are a defensible verdict. The full sequence is in testing an attribution tool inside its refund window.
The structural way to avoid the problem
Prefer a commitment with no window at all. A one-time purchase has no clock running underneath it, so an evaluation that takes six weeks costs the same as one that takes six days.
That is the shape of the €99 read: once, no subscription, full refund if it does not move a budget decision, and nothing installed because the input is a Google Analytics export you already hold. Pro at €299 a month is cancellable at any time and is a separate decision, taken after the first read rather than before it.
What genuinely does expire
One thing, and it is not the refund window: your analytics retention setting. If it is short, the historical window you wanted to evaluate against can disappear while the evaluation is still going, which is covered in the two-month retention trap.
Check that setting on day one of any evaluation. It is the only real deadline in the process and nobody mentions it.
The honest note on urgency
Nothing here is urgent because a vendor says so. It is urgent because calendars drift and retention settings expire, and both are your responsibility rather than the vendor's. The interactive demo costs nothing and needs no signup, which removes the clock from the first step entirely.
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Key Terms in This Article
Analytics
Analytics is the systematic computational analysis of data. It reveals customer behavior and measures campaign performance.
Attribution
Attribution identifies user actions that contribute to a desired outcome and assigns value to each. It reveals which marketing touchpoints drive conversions.
Attribution Debt
Attribution debt is the gap between what your ad platforms claim drove revenue and what actually caused it, carried quarter after quarter into the budget. It is how marketing debt accrues: allocate on claimed conversions long enough and the plan itself becomes the liability.
Causality
Causality is the relationship where one event directly causes another, essential for identifying specific actions that drive desired outcomes in marketing.
Google Analytics
Google Analytics is a web analytics service that tracks and reports website traffic.
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