Track new-client revenue (first 12 months + projected LTV) divided by total marketing spend. A healthy UK IFA achieves 3-6x revenue-to-spend in year 1 and 8-15x on 5-year LTV.
Marketing ROI for a UK IFA should be measured two ways: Year 1 revenue/spend (should be 3-6x for a mature account) and 5-year projected LTV/spend (8-15x). This requires CRM discipline on client revenue attribution and a credible LTV assumption (typical 0.75% ongoing charge on AUM over 7-10 years). Platinum Prospects models this in the Financial Client Acquisition Model framework.