> ## Documentation Index > Fetch the complete documentation index at: https://docs.vortexiq.ai/llms.txt > Use this file to discover all available pages before exploring further. # Pagespeed-Caused Cart-Abandonment Loss, WooCommerce > Cart sessions that hit a slow PDP and abandoned at checkout. Direct evidence that perf is costing revenue, gives ammo to the hosting upgrad... How to read... **Metrics type:** [Cross-Platform Metrics](/nerve-centre/overview#metrics-types-explained) • **Category:** [Ecommerce Platform](/nerve-centre/connectors#connectors-by-type) > Cart sessions that hit a slow PDP and abandoned at checkout. Direct evidence that perf is costing revenue, gives ammo to the hosting upgrade conversation. ## At a glance > Cart sessions that hit a slow product page and then abandoned at checkout. Direct evidence that page-speed is costing the WooCommerce store revenue. | | | | --------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | **What it counts** | `SUM(abandoned cart value) WHERE the cart page or PDP TTFB > p75 baseline AND session ended without conversion`. Joins GA4 / CrUX page-speed data against Woo cart-abandonment data. | | **REST API endpoint** | Woo: `GET /wp-json/wc/v3/orders?status=pending` for cart skeletons. CrUX: Chrome User Experience Report API. GA4: page-speed events. | | **VAT / tax treatment** | Cart values are tax-inclusive (`order.total` semantics). | | **Status filter** | Carts in `pending` (abandoned) status with non-zero value. | | **Refunds / cancelled / failed orders** | Not applicable. | | **Currency** | Cart values in store currency. | | **Channels / sources** | Web only. POS does not have page-speed signal. | | **Self-hosted vs managed-Woo** | **This card is most actionable for self-hosted Woo merchants.** Slow shared hosting is the dominant cause of slow PDPs on Woo. Managed-Woo (Pressable, Kinsta, WP Engine) typically runs \<500ms TTFB; cheap shared hosting often runs >1.2s. Each 100ms over 500ms costs about 1% of conversion. WordPress.com is consistently fast. | | **Time window** | `30D` | | **Alert trigger** | abandoned-cart $ on slow PDPs >$500/30D | | **Roles** | owner, operations, marketing | ## Calculation Calculated automatically from your WooCommerce data. See the At a glance summary above for what the metric tracks and the worked example below for a typical reading. ## Worked example A self-hosted UK fashion brand on Bluehost shared hosting. GA4 + CrUX both connected. 30-day window: 14 Mar 26 to 12 Apr 26. | Bucket | Sessions | Avg TTFB | Cart adds | Conversions | Abandoned cart value | | ------------------------------------------ | -------- | -------- | --------- | ----------- | -------------------- | | Fast PDPs (TTFB \< 500ms) | 88,400 | 380ms | 7,140 | 1,820 | £142,300 | | Slow PDPs (TTFB > 1,000ms) | 54,000 | 1,420ms | 2,890 | 332 | £2,420 | | **Pagespeed-driven cart loss (this card)** | | | | | **£2,420** | Three observations: 1. **Self-hosted variance is the recurring theme.** This brand's slow-PDP bucket is concentrated on the cart and PDP pages where WC's cart fragments (PHP-rendered) are not effectively cached. Bluehost throttles concurrent PHP processes, so traffic spikes hit the slow tail. A move to managed-Woo (Pressable) cut the slow-PDP bucket by \~70% in a similar test. 2. **The £2,420 / 30D figure is conservative.** It only counts carts that abandoned, not the broader funnel friction (visitors who never added to cart because the PDP felt sluggish). The full revenue cost is typically 2-3x this number. 3. **Plugin-induced data shape variance: WP Rocket / W3 Total Cache.** Caching plugins on slow hosts can produce a bimodal TTFB distribution: cached page loads in 200ms, uncached in 2,000ms. The card's p75 threshold catches the uncached tail. Stores with aggressive caching may see this card under-report because most sessions hit cached pages. ## Sibling cards merchants should reference together | Card | Why pair it with Pagespeed Cart Loss | | -------------------------------------------------------------------------------------------- | ----------------------------------------------------------------- | | [WC Conversion Rate](/nerve-centre/kpi-cards/woocommerce/conversion-rate) | Pagespeed-driven loss is a subset of broader conversion friction. | | [WC Total Orders](/nerve-centre/kpi-cards/woocommerce/total-orders) | Sample-size context. | | [Website CrUX Vitals](/nerve-centre/website_performance/crux_vitals) | The page-speed source data. | | [Website TTFB](/nerve-centre/website_performance/ttfb) | Server-side speed view. | | [BC Channel Conversion Rate](/nerve-centre/kpi-cards/bigcommerce/conversion-rate-by-channel) | Cross-platform peer. | ## Reconciling against the vendor's own dashboard **Where to look in WooCommerce / GA4 / CrUX:** Woo: WP Admin → WC → Reports → does not have an abandoned-cart-by-speed view. GA4: Reports → Engagement → Events → page\_load\_time. CrUX: PageSpeed Insights for the cart and PDP pages. The combined view is unique to Vortex IQ. **Why our number may differ from a manual GA4 calculation:** | Reason | Direction | | ------------------------------------------------------------------------------------------------------------ | -------------------------------------------- | | **Time-zone**. UTC vs GA4 reporting timezone vs WP-site timezone. | Boundary effects | | **Self-hosted server uptime**. Outages produce 0-session windows; CrUX may not have data for those windows. | Self-resolves | | **Plugin-version compatibility**. AMP plugins separate AMP and non-AMP sessions; speed distributions differ. | Investigate per-merchant | | **Refund-restock cycle**. Not relevant for this card. | n/a | | **Currency**. Cart values in store currency. | Multi-currency stores need filter alignment. | | **CrUX sampling**. CrUX samples opted-in Chrome users; mobile / desktop split varies. | Either | **Cross-connector reconciliation:** | Card | Expected relationship | | ---------------------------------------------------------------------- | -------------------------------------------------- | | [`website.crux_vitals`](/nerve-centre/website_performance/crux_vitals) | Should track this card's "slow bucket" definition. | ***
Same-metric documentation cross-reference Woo-specific framing (self-hosted variance is the dominant signal). Closest peer: * [`bigcommerce.bc_channel_conversion_rate`](/nerve-centre/kpi-cards/bigcommerce/conversion-rate-by-channel)
## Known limitations / merchant FAQs **Self-hosted vs managed-Woo, why is this card most actionable for self-hosted?** Slow shared hosting is the single biggest driver of slow PDPs on Woo. Managed-Woo hosts run capacity-managed infrastructure; self-hosted shared cannot. **Status-filter selection, why focus on cart abandonment?** Cart abandonment with measurable cart value is the most actionable downstream of slow PDPs. PDP-only abandonment (visited PDP, never added to cart) is harder to attribute to speed alone. **Refund-object accounting?** Not applicable. **Plugin-induced data shape variance, what should I watch?** * Caching plugins (WP Rocket, W3 Total Cache): bimodal speed distribution. * AMP plugins: split traffic into AMP / non-AMP cohorts. * Page builders (Elementor, Divi, Beaver Builder): heavier JS payloads, structurally slower PDPs. **Multi-currency, does it affect this card?** Cart values in store currency; per-currency rollups need filter alignment. **Why does Woo and Stripe disagree?** Stripe does not measure page-speed. **Today is jumpy, why?** 30D window for stability. Daily figures are noisy. **Sync-lag from self-hosted server slowness, can it cause false readings?** Yes, ironically. A host outage produces zero sessions and zero conversions, the card cannot distinguish "lost to speed" from "lost to outage". Use 7D or 30D rolling. **My GA4 shows different abandonment, debug:** 1. Confirm cart-abandonment definition (GA4 funnels vs Woo `pending` orders). 2. Check timezone alignment. 3. Verify the slow-PDP threshold (this card uses p75 baseline; configure per workspace). *** ### Tracked live in Vortex IQ Nerve Centre *Pagespeed-Caused Cart-Abandonment Loss* is one of hundreds of KPI pulses Vortex IQ tracks across WooCommerce and 70+ other ecommerce connectors. Nerve Centre runs the detection layer; Vortex Mind investigates the cause when something moves; Ask Viq lets you interrogate any number in plain English. [Start for free](https://app.vortexiq.ai/login) or [book a demo](https://www.vortexiq.ai/contact-us) to see this metric running on your own data.