The most misunderstood feature in car finance, here's exactly how balloons work, what they cost, and how to exit them safely.
A balloon (also called a residual) is a portion of your loan, typically 20-40% of the car's price, that isn't amortised by your regular repayments. It sits untouched until the final day of the loan, when it falls due as one lump sum. Your repayments are calculated to reduce the loan to exactly the balloon amount, rather than to zero.
Repayments fall because they're only paying off the non-balloon portion of the principal. Cost rises because interest is charged on the entire outstanding balance, including the balloon, for the whole term. The balloon just sits there accruing interest for years. That's the entire trade: better monthly cash flow, higher total interest, deferred obligation.
$40,000 over 5 years at 9% p.a.: no balloon costs about $830/month and roughly $9,800 total interest. With a 30% ($12,000) balloon, repayments drop to around $670/month, but total interest rises to roughly $12,200, and $12,000 is still owed at the end. Model your own structure in the balloon calculator.
Pay it out. Cash the balloon, own the car. Works if the lump sum genuinely will exist, bonuses, asset sales, disciplined saving.
Refinance it. Roll the balloon into a new loan at whatever rates prevail then. Common, but you're financing the same dollars twice.
Sell or trade. The car's value settles the balloon. The risk word is equity: if the car is worth less than the balloon at the end, you top up the difference. Conservative balloons and mainstream cars keep this risk small; aggressive balloons on fast-depreciating cars create it.
Regular upgraders who change cars every few years, cash-flow-focused borrowers and some business users find balloons useful. Keep-the-car-forever buyers who can afford the full repayment are usually better off without one. Either way, choose the exit before you sign, the balloon is only a problem for people who meet it unprepared.