Every attribution system has to decide how far back to look. A touchpoint from yesterday obviously relates to today's sale. One from four months ago probably doesn't. The lookback window is that cut-off.
How the window changes the answer
A short window favors channels that convert quickly: retargeting, branded search, promotions. A long window lets awareness channels like podcasts, YouTube and streaming TV earn credit for the journeys they start.
Change the window and the same sales are credited differently. That isn't an error; it's the window doing its job.
Choosing a window
- 7 days. Impulse and low-price purchases, flash sales, short promotions.
- 30 days. Most consumer brands. Long enough for a podcast or video to start a journey that closes weeks later.
- 90 days. Considered purchases: furniture, electronics, subscriptions with trials, B2B.
A practical way to choose: look at the time between first touch and purchase on your matched sales. If most land inside 10 days, 30 is plenty. If many land after 30, go longer.
Windows and match confidence
Probabilistic matches get weaker with time. A network match an hour before a sale is more convincing than one six weeks earlier. That's why Trakinit's confidence score decays with the gap between touch and sale, while exact matches by click ID or hashed email stay at 99%.
Trakinit plan windows
- Starter: 7 days
- Growth: 30 days
- Enterprise: 90 days
See plans and pricing. Changing plans re-runs attribution with the new window.
Windows by channel
Upper-funnel channels need longer windows. If you invest in streaming TV or podcasts, a 7-day window will undersell them.
Common mistakes to avoid
- One window for every business line. A $20 consumable and a $2,000 product have different buying cycles.
- Confusing lookback with click-through windows in ad platforms. Each ad platform has its own windows; your attribution window is independent of them.
- Changing the window and comparing old reports. Re-run attribution after a change so every period uses the same window.
Frequently asked questions
What is the difference between a lookback window and a conversion window?
They're often used interchangeably. Both describe how long after a touchpoint a sale can still be credited to it. Ad platforms apply their own windows; an independent attribution tool applies one window across every channel.
Does a longer window always mean more credit for upper-funnel channels?
Usually, because awareness channels tend to appear earlier in journeys. But a longer window also admits more weak, probabilistic matches, which is why confidence scores decay with time.
Can I see how long my customers take to buy?
Yes. Open Journeys: each touchpoint shows how long before the sale it happened. If most first touches fall inside two weeks, a 30-day window is ample. Read TikTok to Amazon attribution for an impulse-purchase example.
Start a free trial and compare how your channels look across windows.