Does anyone know about the theory behind 'Velocity banking' and whether it could work in relation to an Irish mortgage? From what I've read this strategy uses short term credit (e.g. Credit card balance) to make lump sum payments off a mortgage with the aim of reducing the term or overall loan interest paid. This works because the structure of mortgage repayments is that in the earlier repayments you pay off a smaller principal (and larger amounts of loan interest) than later repayments. Maybe this only works in US mortgage markets?