Time-to-first-transaction
Activation health; long lags = friction.
- Formula
- Median time from signup to first completed transaction
- Unit
- days
- Models
- Marketplace
| All | Consumer marketplaces: hours to a few days; B2B or high-consideration marketplaces: days to weeksEST | Omega Point estimate |
What it is
Time-to-first-transaction measures the median elapsed time between a user signing up and completing their first transaction on a marketplace — whether as a buyer, seller, or both. Formula: median(first-transaction timestamp − signup timestamp) across all users who have transacted.
How to calculate it
For every user account, record the signup timestamp and the timestamp of their first completed transaction. Subtract signup from first transaction to get elapsed time in days (or hours for fast-moving consumer products). Take the median across the cohort. Users who have never transacted are typically excluded from the median but tracked separately as the "never-transacted" share.
Why it matters
A long median time-to-first-transaction signals friction somewhere in the activation funnel — onboarding complexity, trust barriers, supply-side thinness, or pricing confusion. In marketplace businesses, the first transaction is the true activation moment: only after it does a user experience the core value proposition. Monitoring this median over cohorts reveals whether product or operational changes are removing friction or adding it.
How to read it
There is no established public benchmark for time-to-first-transaction across marketplace businesses. The number is too context-dependent — a consumer resale marketplace (minutes to hours) behaves nothing like a B2B procurement marketplace (days to weeks). No credible cross-company range has been published.
As an Omega Point estimate — an informed directional figure, not a measured one — consumer-focused marketplaces with low-friction checkout tend to see medians in the range of hours to a few days; B2B or high-consideration marketplaces (real estate, freelance services, industrial goods) routinely see medians of one to several weeks. This reasoning draws by analogy from e-commerce add-to-cart and checkout completion timing research, adjusted for the two-sided matching step unique to marketplaces.
In practice, compare this metric against your own trend over time and against your funnel's "never-transacted" rate. Improving either is more actionable than chasing a cross-industry number that doesn't exist.