A conversion metric that measures the duration or number of user interactions between a potential customer's initial engagement with a brand/product and the completion of their first transactional purchase. The Formula \text{TTP} = \text{Date/Time of First Purchase} – \text{Date/Time of First Interaction}
Core Components & Measurement
Metric Dimension How It Is Measured What It Reveals First Touchpoint (Start) Initial ad click, website visit, sign-up, or free trial creation. Evaluates acquisition channel intent and discovery efficiency. Conversion Touchpoint (End) Successful payment authorization or checkout completion. Identifies baseline friction in decision-making and checkout flows. Session Count Total user sessions before purchase (e.g., 1 vs. 4 visits). Distinguishes impulse buying from high-consideration evaluation.
Funnel Friction Detection
A sudden spike in TTP often points to UX issues on product detail pages, hidden checkout fees, confusing pricing tiers, or lack of trust signals.
Channel Efficiency
Comparing TTP across acquisition channels reveals which sources bring high-intent users who convert quickly versus low-intent browsers.
Sales Cycle Optimization
Helps PMs design targeted nudges (e.g., triggered email drip campaigns, limited-time offers, or live chat support) at the precise moment a user stalls in their consideration phase.
Key Role Distinctions
Time to Purchase (TTP) vs. Time to Value (TTV): TTP measures how long it takes a user to pay. TTV measures how long it takes a user to experience the product's core benefits (the Aha! moment) after signing up or making a purchase. Time to Purchase vs. Customer Acquisition Cost (CAC): TTP measures conversion velocity (speed of conversion), while CAC measures financial efficiency (cost per converted customer). A longer TTP often correlates with a higher CAC due to retargeting and nurture costs.