Refinancing refers to the replacement of an existing debt obligation with a debt obligation bearing different terms.

Refinancing may be undertaken to reduce interest rate/interest costs (by refinancing at a lower rate), to extend the repayment time, to pay off other debt(s), to reduce one's periodic payment obligations (sometimes by taking a longer-term loan), to reduce or alter risk (such as by refinancing from a variable-rate to a fixed-rate loan), and/or to raise cash for investment, consumption, or the payment of a dividend.

In essence, refinancing can alter the monthly payments owed on the loan either by changing the loan's interest rate, or by altering the term to maturity of the loan. More favourable lending conditions may reduce overall borrowing costs. Refinancing is used in most cases to improve overall cash flow.