Meta Attribution Window Selector

The wrong attribution window makes bad campaigns look good and good campaigns look bad. Answer four questions and get the right window for your account - with setup steps and what it does to your reported numbers.

What is your primary conversion event?
Purchase (product under $150)
Purchase (product $150+)
Lead or form submission
Free trial or app install
From first seeing your ad, how long does it typically take someone to convert?
Hours - same day impulse
1 to 3 days
4 to 7 days
1 to 4 weeks
1 month or longer
Are you running video or awareness campaigns alongside your conversion campaigns?
No - conversion-focused only
Yes - actively running both
Not yet, but planning to
How do you want to treat Meta's reporting?
Standard - I trust Meta's default approach
Conservative - I cross-reference with Shopify or GA4
Full credit - I want to capture every influenced conversion

Why attribution windows matter more than most founders realize

The attribution window you choose does not change how your ads perform. It changes what gets counted in your reports. A campaign on 7-day click + 1-day view will almost always show more conversions than the same campaign on 1-day click only - not because it is working better, but because it is counting conversions from more days and including view-throughs. That gap can be 30 to 50% or more for some accounts.

The real problem is comparison. If two campaigns run different windows, comparing their CPA or ROAS is meaningless - you are literally measuring different things. The second problem is calibration. If your Meta-reported ROAS is based on 7-day click + 1-day view but your Shopify or GA4 uses last-click, the gap between them is not evidence of fraud. It is math. Understanding which window is right for your business lets you build reporting you can actually trust.

For a deeper look at how Meta's attribution model differs from other platforms, read Meta Attribution Windows: Which One You Should Actually Be Using and The Attribution Problem: Why Every Platform Claims More Credit Than It Deserves.

All four Meta attribution windows compared

Each window counts a different set of conversions. None is objectively better - the right one depends on how long your customers take to decide and whether you want to include view-through credit.

Window What counts Typical inflation vs 1DC Best for Main risk
1-Day Click Conversions within 1 day of clicking your ad Baseline Impulse products, cross-channel triangulation Undercounts considered purchases that happen 2-7 days later
7-Day Click Conversions within 7 days of clicking your ad +15 to 35% Most DTC, SaaS, lead gen - Meta's recommended default for conversion campaigns Includes conversions that may have happened organically without the ad's influence
1-Day Click + 1-Day View Conversions within 1 day of click OR within 1 day of seeing the ad +10 to 25% Impulse products running video or awareness ads alongside conversion campaigns View-through credit is the most disputed in multi-channel reporting
7-Day Click + 1-Day View Conversions within 7 days of click OR within 1 day of seeing the ad +30 to 60% Full-funnel accounts, video-heavy brands, long consideration cycles Highest overlap with other channels - hardest to cross-reference with Shopify or GA4

Related tools and reading

Blog Meta Attribution Windows: Which One You Should Actually Be Using Blog The Attribution Problem: Why Every Platform Claims More Credit Than It Deserves Blog Meta Pixel Signal Quality: Why It Matters More Than Your Targeting Blog Meta Conversions API: What It Is and Whether You Actually Need It Tool Meta Bid Strategy Selector Tool Meta Learning Phase Calculator Tool Meta Ads Troubleshooter Tool Meta Ad Scaling Plan Generator

Meta attribution windows: common questions

What is the difference between click-through and view-through attribution on Meta? +
Click-through attribution credits your ad for conversions that happen after someone clicked the ad within your specified window (1 day or 7 days). View-through attribution credits your ad for conversions that happen after someone saw your ad - even if they never clicked. View-through is more generous and more controversial because the person may have converted due to another touchpoint entirely. Most founders should start with click-only attribution and only add view-through if they are running significant video or awareness campaigns where many customers see but do not click.
How do I change my attribution window in Meta Ads Manager? +
In Meta Ads Manager, you can change attribution at the ad set level. Go to your campaign, click into the ad set, scroll to the Conversions section, and find the Attribution Setting field. You can choose from 1-day click, 7-day click, 1-day click and 1-day view, or 7-day click and 1-day view. Note that changing this setting on a live ad set will reset the learning phase and may affect delivery for 5 to 7 days while the algorithm readjusts. For account-level reporting column defaults, go to Ads Manager columns settings and select the attribution window for your column view - this changes what data is displayed without affecting campaign delivery.
Why does Meta report more conversions than my Shopify or Google Analytics? +
Meta and Shopify count conversions differently. Meta uses last-touch-within-window attribution - if someone clicked your ad within the last 7 days and then converted, Meta takes credit, even if they also clicked a Google ad or organic email link before purchasing. Shopify and Google Analytics typically use last non-direct click attribution and do not count view-throughs. The gap is almost always explained by multi-touch journeys where both Meta and Google claim the same conversion, view-through attribution where Meta credits ad exposures that did not generate clicks, and cross-device journeys that Shopify does not stitch together. Switching to 7-day click only (no view-through) and comparing to GA4's last-click will close most of that gap.
Should I use the same attribution window across all my Meta campaigns? +
Yes - for the most part. Using different attribution windows across campaigns makes performance comparison impossible because the numbers measure different things. A campaign on 7-day click will almost always show more conversions than an identical campaign on 1-day click, simply because it counts conversions from more days - not because it is performing better. The one valid exception is deliberate testing: running a controlled test where you explicitly compare the same campaign across two windows to understand how many conversions fall inside different attribution periods. But as your default operating state, pick one window and apply it consistently across all your conversion campaigns.
What attribution window does Meta use by default? +
Meta currently defaults to 7-day click and 1-day view attribution for new ad sets. This is the most generous standard window - it counts conversions up to 7 days after a click and up to 1 day after a view, even without a click. Many founders inherit this default without realizing it, which makes their Meta-reported ROAS look higher than it would under a stricter window. If you are comparing Meta performance to a third-party attribution tool or your own Shopify analytics, consider switching to 7-day click only (no view-through) for a closer apples-to-apples comparison - knowing you may see a drop in reported conversions that is a measurement change, not a performance change.