What's Snapchat Ads' Default Attribution Window in 2026?

Snapchat Ads' default attribution window in 2026 is 28 days for swipe-up (click) conversions. On the view-through side, it splits by how long someone watched: 2 days for an "engaged view" of 5 seconds or longer, and 1 day for a shorter view, according to Snap's own Ads API measurement documentation.

The Full 28/2/1 Breakdown

Put together, Snapchat's default attribution model credits a conversion to an ad in three situations: the person swiped up on the ad and converted within 28 days, the person watched the ad for 5 seconds or more without swiping and converted within 2 days, or the person saw the ad for under 5 seconds without swiping and converted within 1 day. Snapchat refers to shorthand versions of this setup, like "28/1," in its own documentation and advertiser-facing settings.

Why Snapchat Splits View-Through by Watch Time

Most platforms treat every unclicked impression the same for view-through purposes. Snapchat's two-tier view-through model — 2 days for engaged views versus 1 day for brief ones — is built on the idea that someone who watched 5-plus seconds of a Snap ad has shown meaningfully more attention and intent than someone who scrolled past in under a second, so that stronger signal earns a longer window to convert and still get credited.

Configurable Options

Advertisers aren't locked into the default. Snapchat's swipe-up (click) window can be set to 1 day, 7 days, or the 28-day default, and the view-through window can be set to 1 hour, 1 day, 7 days, or 28 days. Extending view-through attribution to 7 or 28 days will typically inflate reported conversions relative to the default, since it's crediting Snapchat with more conversions that happened without any direct interaction.

How This Compares to Other Platforms

Snapchat's 28-day click window matches Reddit's default exactly, and both are longer than Meta's current 7-day click default. Where Snapchat differs is the engaged-view nuance — Reddit and Meta don't split view-through credit by watch time the way Snapchat does, which reflects Snapchat's video-first ad format and its interest in rewarding creative that actually holds attention.

Pixel vs. Conversions API

Snapchat's attribution windows apply whether conversions are tracked through the browser-based Snap Pixel or the server-side Conversions API, but server-side tracking generally captures more of the events that fall inside those windows, since it isn't affected by ad blockers or browser privacy restrictions that can silently drop pixel-based conversion events. Brands seeing conversion counts that seem low relative to their attribution window should check whether they're still relying on pixel-only tracking.

Bottom Line

If you're auditing Snapchat's reported ROAS against another platform, check whether your account is still on the 28/2/1 default or whether someone widened the view-through window — a 28-day view-through setting can meaningfully overstate Snapchat's real influence on a purchase compared to the platform's own default configuration.

Source: Snap for Developers, Measurement documentation (Ads API).