Google’s April 2026 GA4 update silently halved the default acquisition-conversion lookback window from 90 days to 30 days (groas.ai, 2026). If your WooCommerce store sells anything customers consider for longer than a month — gifting, furniture, B2B services, considered electronics — your upper-funnel touchpoints are now landing in Direct. The average customer journey is 6.5 touchpoints, and B2B journeys average 14+ (1ClickReport, 2026). Most of those touchpoints now sit outside the new 30-day window.
You won’t see a notification. You won’t see a warning banner in GA4. The only signal is a quiet rise in Direct traffic and a quiet drop in your upper-funnel channels — the kind of drift that takes months to notice and quarters to reverse.
Which WooCommerce Purchase Cycles Now Fall Off the Cliff
The 30-day cut is uniform across GA4. The damage isn’t. WooCommerce purchase cycles by category map directly onto how badly attribution is now broken:
- Gifting (35-50 days): The Mother’s Day shopper who saw your Pinterest pin in early March and converts in May? Lookup falls outside the window. Pinterest gets zero credit. The conversion lands in Direct.
- B2B services and SaaS (60-90 days): Almost the entire consideration phase now sits outside the window. The LinkedIn ad that started the journey, the comparison post that built the case, the demo that closed it — all invisible to GA4’s attribution model.
- Considered home goods (14-45 days): Mid-range damage. The first half of the journey is captured; the discovery touchpoint usually isn’t. Stores running upper-funnel Meta or display campaigns see those channels quietly down-weighted.
- Pure impulse, FMCG, under 14 days: Largely unaffected. If your purchase cycle is shorter than the new window, the cut doesn’t change your reports.
The cut isn’t a uniform attribution problem — it’s an upper-funnel attribution problem that gets worse the longer the consideration cycle. Stores selling considered goods take the entire hit. Stores selling impulse goods see almost none of it.
What Actually Changed in the April 2026 Update
The lookback cut is the headline. It travels with three companions that compound the fragility:
- Conversion Paths → Journey Analysis (top 10 default): The Conversion Paths report — the one that showed the full sequence of channel touchpoints leading to a conversion — was renamed and defaulted to the top 10 paths only (groas.ai, 2026). The long tail of less common paths is now hidden by default. You can change the setting; most people don’t.
- First-click removed entirely: First-click attribution was fully removed as a selectable model. There’s no longer a built-in way to credit the discovery touchpoint. For stores running awareness campaigns, the model that used to flatter those campaigns is gone.
- Consent Mode v2 enforcement: EEA and UK data now requires Consent Mode v2 to flow into Google Ads. Stores running a basic banner instead of a real CMP are sending modelled pings instead of real conversions to Smart Bidding.
You may be interested in: Google Quietly Made GA4 Your Default Conversion Source
The Data-Driven Attribution Trap
One detail compounds the lookback cut for smaller stores. GA4’s Data-Driven Attribution model — the one Google now defaults you to — requires 400+ conversions per key event AND 20,000+ total conversions in the lookback window to activate (1ClickReport citing Google Analytics Help, 2026). Below those thresholds, GA4 silently falls back to last-click.
Now the lookback window has been halved. The 20,000-conversion threshold is measured inside the new 30-day window. Stores that just barely qualified for DDA on 90 days are now disqualified on 30. They’ve been moved to last-click without a notification, in the same release that cut the window.
The reporting universe changed underneath them. They never opted in.
The Five-Step Audit
Run this on every WooCommerce GA4 property today:
- Admin → Attribution settings → Acquisition conversions lookback window. Confirm whether it’s 30 or 90. Most properties got cut to 30 in April. Switch it back to 90 days as a baseline.
- Admin → Attribution settings → Reporting attribution model. Note which model is selected. If you were on first-click, you’ve already been silently migrated.
- Journey Analysis (formerly Conversion Paths). Set the top-N display to a higher number — 50 or 100 — to see paths the new default hides.
- Consent Mode status. Verify whether your CMP is sending Consent Mode v2 signals or basic mode. EEA/UK data depends on it.
- Acquisition reports → compare April-onward vs Jan-Mar. Look at the Direct channel specifically. A meaningful rise in Direct in April-May is the fingerprint of the lookback cut.
83% of marketers report customer paths are getting longer year over year (1ClickReport, 2026). The platform’s window just got shorter. The gap between how long customers actually take to decide and how long GA4 will look back is now wider than it has ever been.
You may be interested in: GA4 Consent Mode v2 Without a Real CMP Sends Modelled Pings That Look Like Conversions
Why Restoring 90 Days Is a Stopgap
Switching the property setting back to 90 days fixes the headline number. It doesn’t fix the underlying fragility. The same release that cut the window also removed first-click, capped the Journey Analysis default, and silently migrated stores under the DDA threshold to last-click. Google can change any of those defaults again with another silent update. Your reports live at the mercy of platform configuration choices you didn’t make.
This is the same pattern that’s been compounding since 2023. Cookie denials don’t shrink your Smart Bidding sample — they bias it. Consent Mode without a real CMP feeds modelled guesses to the optimizer. Now the lookback window itself is a moving target.
The durable answer is to stop treating GA4 as the system of record and start treating it as a reporting surface that runs on top of a data store you actually own.
How Seresa Captures the Full Window in BigQuery
Here’s how you actually do this on a WooCommerce store. Transmute Engine™ — Seresa’s first-party Node.js tracking server — captures every event and every touchpoint, hashes PII server-side, and streams the full event log to BigQuery as a permanent record. The lookback window in your warehouse is whatever you choose. Google’s April 2026 cut from 90 to 30 days never touches your warehouse data.
Transmute Engine is a dedicated server, not a plugin. The inPIPE plugin sits inside WordPress as the courier; the engine on your subdomain handles capture, hashing, and routing. With BigQuery as a destination, attribution becomes a query you write, not a setting Google can change underneath you.
Key Takeaways
- GA4 cut the default acquisition lookback from 90 days to 30 days in April 2026 — silently, without an in-product notification. The fingerprint is a quiet rise in Direct traffic from April onward.
- WooCommerce categories with cycles over 30 days take the entire hit: gifting (35-50 days), B2B services (60-90 days), considered home goods (14-45 days). Impulse goods under 14 days are largely unaffected.
- The lookback cut travels with three companions: Conversion Paths renamed and capped at top-10, first-click removed entirely, Consent Mode v2 enforcement for EEA/UK.
- Stores under DDA thresholds were silently migrated to last-click in the same release that cut the window — the 20,000-conversion qualifier is measured inside the new 30-day window.
- Restoring 90 days in property settings is a stopgap, not a fix — the durable answer is streaming WooCommerce events to a warehouse you control, where the window is your choice.
Frequently Asked Questions
Four things, none of them announced loudly. The default acquisition-conversion lookback window was cut from 90 days to 30 days. The Conversion Paths report was renamed to Journey Analysis and now defaults to showing only the top 10 paths. First-click attribution was fully removed as a selectable model. Consent Mode v2 became a hard requirement for EEA/UK data to flow into Google Ads. Most WooCommerce stores haven’t audited their property since.
Because the acquisition lookback was cut to 30 days. A customer who clicked your Pinterest ad 45 days ago and converts today now falls outside the lookback window — GA4 has nothing to attribute the conversion to, so it lands in Direct. The traffic isn’t actually more direct; the attribution window just got shorter.
Open Admin → Attribution settings → Acquisition conversions lookback window → change from 30 days to 90 days. Save. This restores the old default for new data, but it doesn’t retroactively fix the April-to-now period during which GA4 was running on 30 days. That period is permanently 30-day attributed in GA4’s reports.
Anything with a consideration period over 30 days. Gifting cycles run 35-50 days. B2B services and high-ticket purchases run 60-90 days. Considered home goods (furniture, appliances) run 14-45 days. Pure impulse and FMCG categories under 14 days are largely unaffected. The longer the cycle, the more upper-funnel touchpoints now fall off the cliff.
No — it’s a stopgap. Restoring the window changes GA4’s reporting back, but GA4 is still the bottleneck. Data-driven attribution requires 400+ conversions per key event and 20,000+ total conversions in the lookback window to activate; smaller WooCommerce stores silently fall back to last-click regardless of window size. The durable answer is streaming events to BigQuery and running attribution against your own warehouse, where the window is whatever you choose.
Audit your GA4 property’s lookback window this week. If your purchase cycle is longer than 30 days, your attribution is already drifting. Start at seresa.io.
