The short answer: it depends on how much you are borrowing and how quickly you can repay it. A personal loan usually costs less for a larger amount you will repay over months or years, because it has a fixed rate, fixed repayments and a set end date. A credit card can be the cheapest option for a small amount you clear before interest is charged, but it gets expensive fast if you only make minimum repayments. Buy now pay later often charges no interest, but late fees and multiple accounts add up, and it is now regulated as credit in Australia. None of them is best in every situation. The one that costs least is the one that matches your amount, your timeframe and your repayment discipline.
A personal loan, a credit card and buy now pay later are three different tools for three different jobs. A personal loan gives you a lump sum up front that you repay in fixed instalments over a set term. A credit card gives you a revolving limit you can draw on repeatedly, with interest charged on anything not paid off in time. Buy now pay later splits a purchase into instalments, often interest-free, through a separate provider. Knowing which job you are doing is half the decision.
A personal loan tends to cost least when you are borrowing a larger amount and repaying it over time. Because the rate and repayments are fixed, you know the full cost from day one. According to ASIC's Moneysmart, personal loans can be secured or unsecured, with unsecured loans usually carrying higher rates because no asset backs them. The figure to compare is the comparison rate, which Moneysmart describes as a single percentage covering the interest rate plus most fees, so you see the true cost rather than just the headline number. For a car, a wedding, a big trip or consolidating other debts, that predictability is usually worth it.
A credit card is cheapest when you spend a small amount and pay it off before interest applies. Used that way, it can cost nothing and even earn rewards. The trouble starts when the balance rolls over. Moneysmart notes that credit cards charge interest on the unpaid balance, and making only the minimum repayment means you pay far more and take far longer to clear the debt. So a card suits short-term, fully-repaid spending, not funding something big you cannot clear quickly.
Buy now pay later suits small purchases split into a few instalments you can meet on time. Many plans charge no interest, which is the appeal. The catch is the fees and the sprawl. Missed instalments attract late fees, and it is easy to run several accounts at once and lose track of the total. Buy now pay later is now regulated as credit in Australia, which means providers face more consumer protections and checks than before, but it is still debt, and lenders can consider it when assessing a future loan application.
Match the tool to the task. For a small cost you will clear this month, a credit card or buy now pay later is fine. For a larger amount you will repay over months or years, a personal loan is usually cheaper and easier to control because the end date is fixed. Whatever you choose, add up the total cost rather than comparing the weekly or fortnightly figure, and be honest about whether you will actually pay it off on schedule. That honesty, more than the product, decides what it costs you.
Is a personal loan cheaper than a credit card? For a larger amount repaid over time, usually yes, because a personal loan has a fixed lower rate and a set end date, while a credit card charges ongoing interest on any unpaid balance. For a small amount cleared quickly, a credit card can be cheaper.
Is buy now pay later bad for your credit? Using it responsibly and paying on time is generally fine, but missed payments can attract fees, and lenders can take buy now pay later commitments into account when you apply for other finance. It is now regulated as credit in Australia.
Which is best for debt consolidation? A personal loan is the common choice for consolidating multiple debts into one payment, because it has a single fixed repayment and a clear end date. Whether it saves you money depends on the rate and term, so compare the total cost first.
What is a comparison rate and why does it matter? It is a single figure that combines the interest rate with most fees and charges, so you can compare the true cost of one loan against another rather than being drawn in by a low advertised rate.
Written by Ashley, founder of Noma Finance. Before becoming a finance and asset broker, Ashley worked at car dealerships and has personally held every loan type Noma helps with. Noma compares options across a panel of lenders to help people find finance that fits their situation, explained in plain English.
If you are not sure which of these fits your situation, that is the kind of thing we talk people through every day, no pressure and no jargon. Book a call or apply online.
This article is general information only. It does not take into account your objectives, financial situation or needs, and it is not financial or credit advice. Consider whether it is appropriate for you and seek advice from a licensed professional before making a decision. Information is current as at the date below and rules, rates and fees can change, so check the linked sources for the latest.
Last updated: July 2026.
- ASIC Moneysmart, Personal loans: https://moneysmart.gov.au/loans/personal-loans
- ASIC Moneysmart, Credit cards: https://moneysmart.gov.au/credit-cards
- ASIC Moneysmart, Buy now pay later: https://moneysmart.gov.au/buy-now-pay-later
- ASIC Moneysmart, Comparison rate (glossary): https://moneysmart.gov.au/glossary/comparison-rate
Sources last checked July 2026.
Written by Ashley, founder of Noma Finance. Before becoming a finance and asset broker, Ashley worked at car dealerships, and has personally held every loan type Noma helps with. Noma compares options across a panel of lenders to help people find finance that fits their situation, explained in plain English.
This article is general information only. It does not take into account your objectives, financial situation or needs, and it is not financial, credit or tax advice. Consider whether it is appropriate for you and seek advice from a licensed professional before making a decision. Tax outcomes for novated leases and chattel mortgages depend on your circumstances, so speak with a licensed tax adviser or accountant. Any figures used are illustrative only.
