What Meta’s March 2026 attribution update means for your reporting & performance

In March 2026, Meta is rolling out changes to how conversions are attributed across its platform.

Here’s what’s changing, why it’s happening, and how to prepare.

What’s changing

Meta is updating how offsite web conversions (such as purchases, cost per result, and conversion value) are attributed and reported in Ads Manager and the Insights API.

There are two key changes.

1. Click-through attribution will now count link clicks only

Previously, click-through attribution included conversions attributed to all clicks on an ad, including likes, comments, shares, profile visits and expanding and image/video to full screen.

Going forward, click-through attribution will include link click conversions only.

This brings Meta’s click-through reporting closer to how third-party analytics tools like Google Analytics attribute conversions - where a user must actually click through to the site.

This means that if your campaigns generate a meaningful volume of non-link interactions, you will see a reduction in reported click-through conversions once the update rolls out. However, this will remove ‘false-positives’ and drive better targeting using higher intent outbound click actions only, as inputs.

2. Engaged-view attribution is becoming engage-through 

Meta is also expanding and renaming “Engaged-view attribution.” The new metric, called Engage-through attribution, will now include:

• 5-second video view conversions (as before)

• Conversions attributed to non-link-click engagements (likes, shares, comments, etc.)

The existing “1-day engaged view” metric will become “1-day engagement” to reflect this broader definition.

Conversions that previously sat under click-through (because they followed a non-link click) will now sit under engage-through.

Why Meta is making these changes

There are two main drivers behind this update.

1. Social doesn’t behave like search

Traditional attribution models were built around a search-first mindset, where the primary meaningful interaction is a link click.

Social platforms operate differently.

Users discover products through content, video, comments, and shared posts. They may engage first, return later, and convert through a separate session.

By separating link clicks from broader social engagement, Meta is trying to reflect those different behaviours more clearly.

2. Reducing reporting discrepancies

Most advertisers are familiar with the question: “Why does Meta report one thing, and Google Analytics report another?”

Some discrepancy is to be expected - Meta only sees activity within its ecosystem, while analytics platforms can take a broader cross-channel view. But a significant source of difference has been attribution definitions.

By narrowing click-through attribution to link clicks only, Meta is creating closer alignment with third-party reporting tools.

At the same time, engage-through attribution preserves visibility into the value of social interactions that external tools typically don’t capture.

What you’re likely to see in March

Once the changes roll out (targeted for mid-to-late March), you may notice:

• Lower click-through conversion counts

• Shifts in reported CPA and ROAS

• Benchmark inconsistencies compared to prior months

• Differences in performance reporting for click-only campaigns

It’s also worth noting that there will not be a true legacy reporting view to compare old vs. new definitions. While attribution breakdowns and comparison tools will help provide context, historical time series will not perfectly mirror the old model.

That means March may require more explanation in stakeholder reporting than usual.

Meta’s guidance to minimise disruption

Once these changes have rolled out, Meta has provided some guidance on how advertisers should respond.

1. Update adjustment factors and performance targets

Meta advises that if you apply adjustments to Ads Manager metrics based on incrementality or another third-party source of truth, you should update your adjustment factors (i.e. multipliers) to account for the changes. This means any Ads Manager performance targets (e.g. cost per result) should also be updated.

As the underlying attribution definitions are changing, any multipliers or internal performance benchmarks built on the previous model may no longer be accurate.

2. Review ROAS and cost-per-result bidding strategies

If you utilise ROAS or cost-per-result bid strategies and start experiencing delivery constraints, you should update your ROAS or cost per result goal accordingly.

Reported conversions and ROAS may shift under the new attribution definitions, so tight bid targets could unintentionally restrict delivery, even if underlying performance hasn’t materially changed.

3. Reconsider click-only attribution settings

Finally, Meta is encouraging advertisers to look beyond click-only attribution to utilise engage-through and/or view-through as well.

Because conversions previously attributed to non-link clicks will now sit under engage-through, advertisers relying solely on click-only attribution may see a more pronounced shift in reported results.

Reviewing attribution settings in light of the new definitions may help ensure your reporting lens reflects how your customers actually interact with your ads.

In summary 

Meta’s March 2026 update to attribution definitions won’t impact how your campaigns actually perform, but it will change the way results are categorised and reported. That means your ROAS, CPA and key benchmarks might change, even if underlying performance remains stable.

It could change campaign targeting for the better, as click-based attribution now only focuses on outbound clicks, but in the short term it could cause some minor disruption.

Older campaigns you have running might not have the ‘engaged-view’ (soon to be ‘engaged-through’) setting, meaning this change in reporting could impact them more, as the attribution of engagement clicks (rather than outbound link clicks) disappear from reporting on those campaigns - rather than being reallocated. Similarly, campaigns with click-only attribution settings will also see engagement-click attributed conversions disappear from the reporting on those campaigns.

Meta says the aim is to create closer alignment with third-party tools like Google Analytics, while still showing the value of social interactions such as likes, shares and comments.

The key to managing this change is preparation. Make sure internal stakeholders understand that this is a reporting adjustment, set expectations ahead of time, and review targets where needed.