Offline Conversion Tracking
Sending CRM-verified outcomes back to ad platforms so they learn which leads became clients.
Offline conversion tracking (OCT) is the process of sending events that happen outside the browser - in CRMs, dialler systems, payment platforms or back-office software - back to ad platforms so that paid media optimisation can learn from real business outcomes, not just on-page form fills.
Why OCT matters in UK financial services
For most UK regulated-advice niches, the form fill is not the conversion that matters - the booked discovery call, the qualified MQL, the signed client and the lifetime fee revenue are the conversions that matter. Without OCT, ad platforms optimise toward whatever forms produce, regardless of lead quality. With OCT, they optimise toward the events that actually drive revenue.
How OCT works on the major platforms
- Google Ads - offline conversion imports keyed on
gclid(or Enhanced Conversions for Leads using hashed PII). - Meta - Conversions API (CAPI) using a hashed user identifier plus the
fbclidor browser pixel ID. - LinkedIn - Conversions API using
li_fat_idand email/IP matching. - Microsoft Ads - offline conversion imports keyed on
msclkid.
The advertiser captures the click ID at form submission, persists it on the lead record in the CRM, and pushes status changes (booked, qualified, signed, churned) back to the ad platform with the click ID attached.
Typical lift from implementing OCT
UK financial advice clients implementing OCT correctly typically see:
- 20-40% lower CPL within 60 days as platforms learn from richer signal.
- 25-60% higher MQL-to-client rate on the same paid traffic.
- 15-30% lower CAC payback period.
OCT is the single highest-leverage technical fix for most UK adviser paid-media accounts.
Related terms
- Click ID
- Enhanced Conversions
- Conversions API
- CAC Payback