GA4 paid and organic last-click model
Alongside data-driven attribution, Google Analytics 4 retains last-click models that assign 100% of conversion credit to the final touch. GA4 documents a paid-and-organic last-click model that credits the last channel and, like last-non-direct logic, avoids crediting a direct visit when a prior campaign click is available. Understanding this default-eligible model clarifies how GA4 reports single-touch credit after the 2023 model changes.
How the model assigns credit
Last-click attribution gives all of a conversion's credit to the final touchpoint before conversion. GA4's paid-and-organic last-click model follows last-non-direct conventions: where a prior non-direct click exists in the lookback window, a closing direct visit does not absorb the credit.
This makes the model treat direct traffic conservatively, attributing conversions to the last identifiable marketing channel instead.
When to use it
Last-click is simple and reproducible, which is why it remains a reporting baseline even where data-driven attribution is the default. It is useful for channels close to conversion and for sanity-checking model-driven numbers.
Its weakness is structural: it credits only the closing channel and ignores the assisting touches earlier in the path. Pair it with assisted-conversion or path reports to see what last-click hides.
- 100% credit to the final qualifying channel
- Direct visits skipped where a prior click exists
- Reproducible but blind to earlier assists
How it appears in analytics and logs
Conversions credited to the last channel — excluding qualifying direct visits — mean GA4 is applying its last-click (paid and organic) model rather than data-driven distribution.
Diagnostic use case
Read GA4 conversion credit when last-click is selected, and explain why a direct session may not receive the conversion if an earlier paid or organic click exists.
What WebmasterID can help detect
WebmasterID records the observed referrer and campaign of each session, so you can audit how a platform's last-click logic assigns credit against your own first-party channel data.
Common mistakes
- Assuming last-click credits direct traffic for every closing session.
- Using last-click alone to judge top-of-funnel channels.
- Confusing GA4's last-click model with first-click logic.
Privacy and accuracy notes
Educational explanation of documented GA4 model behavior; not legal advice. Confirm the current model definition in Google's Help Center before relying on it.
Related pages
- Last-click attribution: simple, and what it hides
Last-click attribution assigns 100% of a conversion's credit to the last touchpoint before it. It is simple, deterministic, and the historical default — which is exactly why it misleads: it ignores every earlier touch that created demand, systematically overrating bottom-funnel channels and underrating discovery.
- Last non-direct click
Last non-direct click is an attribution rule that credits the most recent non-direct channel in the path. When the final interaction before converting is 'direct' (someone typing the URL or returning via a bookmark), the model skips it and credits the prior identifiable marketing channel instead — on the reasoning that direct traffic is often the downstream result of earlier marketing rather than a source of its own.
- GA4 default attribution model change
Google announced that, starting in 2023, Google Analytics 4 would deprecate several rule-based attribution models — first-click, linear, time-decay, and position-based — in the Attribution settings and reports. After the change, GA4 offers data-driven attribution (the default for new properties) and a paid-and-organic last-click model. Knowing exactly which models survived prevents teams from chasing reports that no longer exist.
- Attribution analytics
Audit channel credit against first-party session data.
Sources and verification notes
- Google Analytics Help — Attribution and attribution modelingDefines GA4's last-click (paid and organic) attribution model.
Last reviewed 2026-06-24. Facts are checked against primary/official sources where available; uncertain specifics are marked “Data not yet verified” rather than guessed.