Avoid These 5 Repayment Mistakes on Your Home Loan

Your home loan repayment structure determines how much you pay and when you finish paying it.

Most ADF members in Darwin and across the Northern Territory set up their home loan once and let it run. That's a mistake. The difference between a repayment structure that works for your situation and one that doesn't can add years to your loan and thousands in interest. These five mistakes come up regularly with defence members in the NT, and they're all avoidable.

Mistake 1: Setting Repayments to Minimum Without a Reason

Your minimum monthly repayment is exactly that: the floor, not the target. When you pay only the minimum on a principal and interest loan, you're paying off the balance as slowly as the lender allows. That suits borrowers who need every dollar of cash flow elsewhere, but if you have room in your budget, you're paying interest on money you could have cleared.

Consider a scenario where someone borrows at the NT median and pays the minimum over 30 years at current variable rates. If they increase their repayment by $200 per month from day one, they could cut multiple years from the loan term and save a substantial amount in interest. That's not theoretical. It's arithmetic.

If your income is stable and you're not directing surplus cash into an offset account, lifting your repayment even slightly puts you ahead. The risk is treating the minimum as the default when your situation doesn't require it.

Mistake 2: Choosing Interest-Only Without an Investment Strategy

Interest-only repayments lower your monthly cost because you're not paying down the principal. That structure works when you're holding an investment property and want to maximise cash flow or deductions. It doesn't work when you're living in the property and have no plan to build equity.

In our experience, some ADF members choose interest-only on an owner-occupied loan because the repayment looks more manageable. The problem arrives at the end of the interest-only period, usually five years, when the loan reverts to principal and interest and the repayment jumps. You haven't reduced the balance, so you're now paying off the full amount over a shorter remaining term.

If you're borrowing to live in the property, principal and interest repayments build equity from the start. If you're investing and want to hold the property long-term, interest-only can make sense as part of a broader strategy. Without that strategy, it's a short-term fix that costs more later.

Mistake 3: Ignoring Offset Accounts When You Have Savings

An offset account is a transaction account linked to your home loan. Every dollar in the offset reduces the balance on which interest is calculated. If you have $20,000 sitting in a savings account earning minimal interest and a home loan charging a higher rate, you're paying more in interest than you're earning.

A member based near Darwin borrowed to buy a home and kept $25,000 in a separate savings account for emergencies. That's sensible risk management, but the savings account paid a fraction of what the home loan was costing in interest. Moving that $25,000 into an offset account linked to the mortgage saved interest on the loan balance every day without locking the funds away. The money stayed accessible, and the net interest cost dropped.

Not all lenders offer offset accounts on every home loan product, and some charge a higher rate or annual fee for the feature. The calculation is whether the interest saved exceeds the cost. For most people with a decent buffer of savings, it does.

Mistake 4: Locking Your Entire Loan on a Fixed Rate Without Flexibility

A fixed interest rate gives you certainty. Your repayment stays the same for the fixed period, usually one to five years. That's useful if you're budgeting around a set income or expect rates to rise. The limitation is that fixed rate loans typically restrict extra repayments and don't allow offset accounts. If your circumstances change and you want to pay the loan down faster or access redraw, you're either blocked or facing break costs.

A split loan structure lets you fix part of the balance and keep the rest on a variable rate. You get some repayment certainty from the fixed portion and full flexibility on the variable portion, including the ability to make extra repayments and link an offset. Many defence members in the NT hold savings for postings or deployments. A fully fixed loan can't make use of those savings the way a variable or split loan can.

If you're considering a fixed rate home loan, ask yourself whether you need complete certainty or whether a split structure gives you both stability and room to move.

Mistake 5: Not Reviewing Your Loan After the First Two Years

Your loan structure should match your situation. When your situation changes, the loan structure should too. ADF members in the NT move bases, get promoted, deploy, take on extra duties, or start families. Each of those shifts can affect your income, your expenses, or how long you plan to stay in the area.

We regularly see defence members who set up a loan three or four years ago and haven't looked at it since. In that time, their income may have increased, their savings may have grown, or their interest rate may have drifted above what they could now access elsewhere. A loan health check every couple of years picks up whether your rate is still competitive, whether your repayment structure still makes sense, and whether you could be saving by refinancing or restructuring.

If your fixed rate is about to expire, that's a trigger to review. If you've built up equity and your loan-to-value ratio has improved, that's another. Don't wait until something breaks to check whether the loan is still working for you.

Your repayment structure isn't set in stone. It should move with your career, your income, and your goals. The five mistakes above cost ADF members across the Northern Territory more than they need to pay, and they're all correctable. If any of them sound familiar, it's worth running the numbers again.

Call one of our team or book an appointment at a time that works for you.

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