Digitising Microfinance Loan Repayment — Mobile Money & Women's Financial Empowerment in Mwanza, Tanzania

In Tanzania, women running microenterprises often rely on group-based microfinance loans repaid in cash at in-person meetings, which offers little privacy over money and can expose savings to claims from other household members. BRAC Tanzania Finance Limited, one of the country's largest microfinance institutions, partnered with economists Rachel Heath (University of Washington) and Emma Riley (University of Oxford), working with Innovations for Poverty Action (IPA), to test whether simply changing the repayment channel from cash to mobile money could shift women's financial control.

The study aimed to isolate the causal effect of digitising loan repayment itself -- rather than bundling it with new financial products or subsidies -- on women's financial control and household decision-making.

At 7 BRAC branches in the Mwanza region, 152 of 176 eligible microfinance groups, covering roughly 3,500 women, were randomly assigned to continue cash repayment or to switch to mobile-money repayment, with weekly or biweekly in-person meetings. A representative sample of 750 women was tracked over roughly 9-10 months.

61% of the treatment group made at least one loan repayment via mobile money. Relative to the cash-repayment control group, treated women recorded a 0.23 standard-deviation increase in a financial-control index (significant at the 1% level), a 0.11 SD increase in a household decision-making index (significant at 10%), roughly $15 PPP higher mobile-money savings balances, and about 50% higher average monthly transaction value on their mobile-money accounts. The mechanism was not secrecy from spouses: moving repayment to mobile money gave women a legitimate, trackable reason to set money aside for the loan ('earmarking'), which in turn opened conversations with husbands about household finances.

The effects on savings and decision-making, while statistically significant, are modest in absolute size, and the intervention relied on an existing well-run microfinance institution with regular group meetings, so results may not transfer to informal or unbanked populations without that infrastructure. The published output is a rigorous academic working paper rather than a routine internal programme evaluation, and available sources do not document whether BRAC Tanzania has since scaled mobile-money repayment across its full portfolio.