What Is YouTube Ads' Default Attribution Window in 2026?

YouTube ads run through Google Ads use a 30-day default attribution window for standard click-through conversions — the same default applied to Search, Shopping, and Performance Max. Video-specific "engaged-view conversions," which credit a conversion after someone watches a meaningful portion of a video ad without clicking, use a separate 3-day default window instead.

Two Windows, Two Different Triggers

YouTube is the only major Google Ads surface with two distinct default windows running at once:

• Click-through window (30 days): a standard conversion is credited when someone clicks the video ad and completes the conversion action within 30 days, identical to Search and Shopping defaults.
• Engaged-view window (3 days): applies only to viewers who don't click. For skippable in-stream ads, the viewer must watch at least 10 seconds (or the full ad if it's shorter); for in-feed or Shorts ads, at least 5 seconds. If that viewer converts within 3 days without ever clicking, it's counted as an engaged-view conversion.

Why Video Ads Get a Separate Window

Most people who see a YouTube ad never click it — video is a watched format, not a clicked one. Without engaged-view tracking, a huge share of the influence a video campaign has on conversions would go completely unmeasured, since standard click-through conversions can't capture someone who watched the whole ad and converted later without clicking back through it.

Both Windows Are Adjustable

Advertisers can customize the engaged-view conversion window anywhere from 1 to 30 days, and the click-through window from 1 to 90 days depending on the conversion action type, inside each conversion action's settings in Google Ads. Google has also been loosening fixed defaults across its measurement stack: in August 2026, Google Analytics dropped its previously fixed 3-day engaged-view lookback window in favor of an editable 1-to-30-day range, signaling the same flexibility is likely coming to more Google Ads surfaces over time.

What This Means for Reporting

A campaign that looks weak on click-through conversions alone may still be doing real work through engaged views — check both numbers before cutting a YouTube line item. Conversely, if your typical buying cycle runs longer than 3 days after someone watches an ad without clicking, the default engaged-view window will systematically undercount video's contribution, and widening it is worth testing.

Budget Decisions Should Separate the Two Metrics

Advertisers comparing YouTube against click-based channels like Search often make the mistake of judging video spend purely on its 30-day click-through conversions, since that's the number that lines up cleanly with a Search campaign's own reporting. Doing that ignores the engaged-view conversions sitting in a separate report entirely, and can make a YouTube campaign that's genuinely influencing purchases look like it's underperforming relative to its actual contribution to pipeline.

Bottom Line

Don't judge YouTube ad performance on a single number: check click-through conversions against the 30-day default and engaged-view conversions against the separate 3-day default, and extend either window if your sales cycle runs longer than Google's out-of-the-box settings assume.

Sources: Google Ads Help, "About conversion windows"; ppc.land coverage of YouTube engaged-view conversions and Google Analytics' August 2026 engaged-view window change.