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What Every First Home Buyer Needs to Know Before Signing Anything
A mortgage is the largest financial commitment most people will ever make — typically 25–30 years of monthly payments that will consume 25–35% of their take-home income. Understanding exactly what you're signing before you sign it is not optional. This is the information your bank will not volunteer.
The deposit trap most buyers fall into
A larger deposit isn't just about reducing your loan amount — it's about avoiding Private Mortgage Insurance (PMI) in the US, or Lenders Mortgage Insurance (LMI) in Australia and South Africa. Most banks require PMI/LMI when your deposit is below 20%. This insurance protects the bank — not you — and typically costs 0.5–1.5% of the loan amount per year. On a $400,000 loan that's $2,000–$6,000 per year in extra cost, adding nothing to your equity.
Higher monthly payment, PMI/LMI applies, less negotiating power, higher interest rate offered.
PMI may still apply. Stronger negotiating position. Better rates. More equity from day one.
No PMI. Best available rates. Maximum negotiating leverage. Significantly lower total cost.
Premium rates. Minimal risk to lender. Maximum equity position. Lowest total interest paid.
Fixed vs variable: the decision that can cost or save you thousands
A fixed-rate mortgage locks your interest rate for the loan term. A variable (adjustable) rate mortgage moves with central bank rates. In rising rate environments, fixed wins. In falling rate environments, variable wins. Nobody knows which way rates will move — which is why many buyers opt for a fixed rate as insurance against the unknown, accepting a slightly higher initial rate in exchange for certainty.
A common strategy is a split mortgage — fixing 60–70% of the loan and leaving 30–40% variable. This gives partial protection against rising rates while allowing you to benefit if rates fall, and typically allows extra repayments on the variable portion without penalty.
The true cost of a 30-year mortgage on a $450,000 home
At 6.8% over 30 years with a 20% deposit ($90,000): your loan is $360,000. Your monthly payment is roughly $2,360. Over 30 years you'll pay approximately $849,600 in total — meaning you'll pay nearly $490,000 in interest alone, more than the original home price. This is not a reason not to buy — it's a reason to understand what you're buying, and to make extra repayments whenever you can.
7 mortgage facts that banks don't advertise
1. Your interest rate is negotiable. Banks quote their standard rate first. If you have a good credit score, stable income and a meaningful deposit, you can often negotiate 0.25–0.5% off. On a 30-year mortgage that's tens of thousands of dollars.
2. Offset accounts are more powerful than extra repayments in many cases. An offset account links your savings to your mortgage. Every dollar in the account reduces the balance on which interest is calculated — effectively earning your mortgage interest rate, tax-free, on your savings.
3. The first 5 years are the most important. Due to amortisation, extra payments in the first 5 years have dramatically more impact than the same payments in year 20. Every extra dollar reduces the principal on which interest compounds for the remaining 25 years.
4. Refinancing isn't free. Switching to a lower rate sounds simple but involves valuation fees, legal fees, and potentially break costs on fixed rates. Always calculate the total cost of refinancing vs the total saving from the lower rate — the breakeven point is typically 18–36 months.
5. Your borrowing capacity is not your budget. Banks calculate what you can afford based on current rates plus a buffer. Just because a bank will lend you $600,000 doesn't mean borrowing $600,000 is wise for your lifestyle, goals or risk tolerance.
6. Location appreciates — the house depreciates. The building loses value over time. The land gains value. This is why a small house on a large block in a good location consistently outperforms a large house on a small block in a mediocre one. Buy the worst house on the best street you can afford.
7. Interest-only loans are a trap for most buyers. Interest-only periods (common in investment property) mean your entire payment is interest — your balance never reduces. At the end of the interest-only period your repayments jump significantly as you now must repay the full principal in a shorter time.