What are the most common mistakes first-time home buyers make with their mortgage?

First-time home buyers commonly make mistakes such as not comparing lenders, underestimating total homeownership costs, focusing only on interest rates while ignoring other loan terms, and failing to stress-test affordability against rate increases. Other pitfalls include overusing CPF savings, missing refinancing windows after lock-in periods expire, and neglecting mortgage insurance. Working with a mortgage advisor can help you avoid these costly errors and make a more financially sound purchase.

Last updated: 22 Apr 2026

First-time home buyers often make mistakes that can cost them tens of thousands of dollars over the life of their mortgage. Being aware of these common pitfalls can help you avoid them.

One of the most prevalent mistakes is not shopping around. Many buyers accept the first loan offer they receive or go with their existing bank without comparing alternatives. Interest rates and terms can vary significantly between lenders, and even a small rate difference compounds into substantial savings over a 25 to 30 year tenure. Using a mortgage comparison service like Cashew ensures you see the full range of options.

Underestimating the total cost of homeownership is another common error. Beyond the mortgage, buyers need to budget for stamp duties, legal fees, renovation, furniture, insurance, property tax, maintenance fees, and ongoing utility costs. Stretching to the maximum loan amount without accounting for these expenses can create financial stress.

Focusing only on the interest rate while ignoring other loan terms is a costly oversight. A low rate with a long lock-in period, high early repayment penalty, or unfavourable post-promotional terms may not be the best deal overall. The effective cost of a loan should be evaluated holistically.

Failing to stress-test affordability is risky. Many buyers base their calculations on current income and interest rates without considering what happens if rates rise, income drops, or unexpected expenses arise. A prudent approach is to ensure you can still afford your mortgage at a rate 1% to 2% above the current level.

Using too much CPF for the property is a mistake that becomes apparent only upon selling. The accrued interest refund requirement means that excessive CPF usage can significantly reduce your cash proceeds when you sell.

Not timing refinancing is a missed opportunity. Many homeowners continue paying higher rates long after their lock-in period expires simply because they do not actively monitor the market.

Neglecting insurance is a risk that could devastate your family's finances if the unexpected occurs. Mortgage insurance or adequate life cover should be in place before or at loan disbursement.

Cashew's advisors help first-time buyers navigate these potential pitfalls systematically, ensuring a smooth and financially sound purchase journey.