Online higher education has been a success in part because it is less costly to students and governments than conventional education, so both students and governments receive higher returns on their investment than in conventional higher education. However, many online institutions appear to have considerably lower graduation rates than conventional education--the so-called online education deficit that reduces its advantage. This deficit can be reduced through online education institutions investing money in both their course design strategies and their student support, including teaching. This article focuses on student support and suggests that if support increases student retention, institutions will receive a financial return through increased income. It argues: if that increase in income can then be managed to be greater than the original investment, institutions will make a positive return on the investment--that is, a surplus. That surplus can then be reinvested in further student support and potentially increase student success still further. The article then determines what those returns on investment might be in various scenarios depending on institutional funding arrangements. These determinations produce a series of formulae in which actual financial figures can be substituted to calculate those returns.