Abstract
USSD — the star-and-hash menu, not an app — still carries the large majority of Kenya's mobile-money transactions, for sound economic reasons: it needs no data, no smartphone, and almost no onboarding cost, and it is dramatically cheaper for an operator to run than an app. None of that is in dispute. What has never been added up is the other side of the ledger: the aggregate human time a population spends navigating that menu, one twenty-to-forty-five-second session at a time, multiplied across tens of millions of people and tens of billions of transactions a year. This paper borrows a framework built for an entirely different context — Herd and Moynihan's theory of administrative burden, developed to describe citizens' friction with the state — and applies it to a private payment rail instead, then builds a transparent, source-anchored estimate of what that burden actually totals, nationally and per person, with every assumption shown rather than hidden inside one confident number.