What is principal and interest vs interest only?
Principal and interest is a loan repayment method where borrowers pay both the borrowed amount and accrued interest, while interest-only loans require only interest payments during a set period, with the principal due later.
Two common repayment structures exist in Australian residential and investment lending. Principal and interest loans require borrowers to repay both the original loan amount and interest charges over the loan term, building equity throughout. Interest-only loans allow borrowers to pay only the interest accruing each month or quarter, with the principal amount remaining unchanged until a set period ends.
Interest-only lending is particularly common in investment property finance. Lenders typically permit interest-only periods of 5 to 10 years, after which the loan converts to principal and interest repayment for the remainder of the term. This structure appeals to property investors because it lowers monthly outgoings during the early years, freeing cash for reinvestment or offsetting rental income against expenses.
The choice between these structures affects borrowing capacity, cash flow, and long-term costs. Interest-only loans allow larger borrowings because monthly payments are lower, but they do not reduce what is owed. Principal and interest payments build equity immediately, though they require higher regular outlay. Perth mortgage brokers often help investors assess which structure suits their financial strategy, considering property holding periods, expected rental yields, and refinancing timelines. After an interest-only period ends, repayment rates typically rise as the principal becomes payable, so forward planning is important.