Meta Ads Attribution After the 2026 Window Changes
Why Meta's reported conversions changed in 2026 without any change in sales, and how to read results now.
Key Takeaways
- Since January 12, 2026, Meta reports view-through conversions only within one day of someone seeing an ad.
- From March 2026, click-through attribution counts only link clicks, and other interactions are reported separately as engage-through conversions.
- Both changes lowered reported conversions in many accounts without any change in real sales.
- Compare periods using the same attribution setting, and check Meta's numbers against your CRM or sales records every month.
On This Page
Meta changed how it credits conversions twice in 2026, and both changes made many accounts report fewer conversions with no change in actual sales. In January, Meta stopped reporting the 7-day and 28-day view windows. In March, it narrowed click-through credit to link clicks and moved other interactions into a separate engage-through category. To read results fairly now, compare periods with matching settings, annotate both dates and judge Meta against your own records.
What an Attribution Setting Is
An attribution setting tells Meta how long after someone sees or clicks an ad a conversion still counts. A common setting is 7-day click and 1-day view: a purchase within seven days of a click, or within a day of seeing the ad without clicking, is credited to the ad.
The January 12 Change
Meta stopped returning data for the 7-day view and 28-day view windows in its reporting, following an announcement in October 2025 (Meta for Developers). Click windows of 1, 7 and 28 days remain, and 1-day view is now the only view-through window. Accounts that reported with longer view windows, often ecommerce and awareness campaigns, saw the largest falls in reported conversions.
The March Change
In March 2026, Meta reclassified conversions. Click-through attribution now counts only link clicks. Conversions that follow other interactions, such as reactions, comments or shares, are reported as engage-through conversions with a one-day window, and the threshold for an engaged video view was lowered. Accounts with lots of social engagement saw click-through conversions fall and engage-through conversions appear.
Comparing Periods Fairly
- Annotate January 12 and March 2026 in every report and dashboard.
- Use the same attribution setting for both periods, ideally 7-day click and 1-day view.
- Use the Compare attribution settings option in Ads Manager to see results by window side by side.
- Compare totals with your own sales, bookings or qualified leads for the same dates.
If Meta's reported results fell sharply while your own records held steady, the change is in measurement.
Checking Meta Against Your Own Data
Platform reporting will always differ from your records, because Meta can only see part of each customer's path. Build a simple monthly check: Meta-reported conversions, conversions in your CRM or store from people who came through Meta (using UTM tags and lead source fields) and total new customers. Watch the ratio between them over time. A stable ratio means Meta's numbers are useful for comparing campaigns even if they overstate or understate the total.
Lift Tests
The clearest answer to how much Meta ads actually add comes from a conversion lift study, which withholds ads from a random group and compares results. Lift studies need enough conversions to be reliable and are not available to every account, but they are worth running once spend is steady.
Frequently Asked Questions
Why did my Meta conversions drop in January 2026?
Most often because reporting used 7-day or 28-day view windows, which Meta stopped reporting on January 12.
What is engage-through attribution?
A category for conversions that follow interactions other than link clicks, such as reactions or comments, counted within one day.
Which attribution setting should I use?
7-day click and 1-day view suits most lead generation and ecommerce accounts. Keep it consistent across reports.
Sources
- Search Engine Land Meta coverage searchengineland.com