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What the amortisation actually shows

Two things surprise almost every first-time buyer:

• Early payments are overwhelmingly interest. In the first years only a small slice of each instalment reduces the balance — which is why the total-interest figure is so much larger than expected, frequently approaching or exceeding the purchase price over a full term;
• Extra payments have outsized effects, because they attack the capital directly and remove interest from every remaining month. See what yours would do in the extra payment calculator — for most homeowners it is the single best-value use of spare money.

Your rate is probably variable — plan for that

In most markets a home loan is priced off a benchmark rate plus or minus a margin, so your instalment moves when the central bank moves rates.

Two consequences worth acting on:

• Stress-test before you commit. Run your amount at today's rate, then two percentage points higher, and check you could still pay. Rates move meaningfully over the life of a 20-year loan;
• The margin is negotiable. A concession of half a percentage point sounds trivial and is worth a large sum over decades — it is one of the highest-value negotiations most people ever have. Getting competing offers is what produces it.

Budget the costs that arrive at transfer

The repayment is not the cost of buying. Budget separately, in cash, for the transaction itself:

• Transfer taxes or duties, where your market charges them — see the tax section of our calculator index;
• Legal and conveyancing fees for the transfer;
• Loan registration or arrangement costs, often billed separately from the transfer;
• Deeds, registry or titling fees;
• Rates, levies or service charges settled in advance;
• Property insurance, which lenders normally require, plus moving costs and immediate repairs.

Ask for a written estimate of the total transaction cost early. A purchase that stalls because the buyer cannot fund the fees is common and entirely predictable.

Verify what you are actually buying

Before the finance question comes the ownership question. Confirm that the seller is the registered owner and that the property has clean, transferable title, through your own lawyer rather than documents the seller provides. Check for outstanding rates, levies or charges that attach to the property rather than the seller.

Property with unclear or unregistered title is usually harder — sometimes impossible — to finance, and that difficulty is a signal about the risk you would be taking on.

Check affordability against take-home

Lenders assess on gross income; you live on net. Get your real figure from the take-home pay calculator, then test the instalment in the qualification calculator and against your other commitments in the affordability calculator.

And weigh the decision itself honestly — the rent vs buy calculator tests it on your own numbers rather than the general case.

Frequently asked questions

What rate should I enter?

A rate a lender has quoted you. If you have no quote yet, model the current benchmark rate and a point or two above it to bracket the range.

Should I take a longer term?

A longer term lowers the instalment and substantially increases total interest. If cash flow forces one, take it — then overpay when you can, which recovers much of the difference.

Is a bigger deposit worth it?

Usually on two counts: a smaller loan, and often a better rate. Test the combined effect above.

Fixed or variable rate?

Fixed buys certainty, normally at a higher starting rate and for a limited period. Ask what the fixed rate would be and for how long, then decide against your own tolerance for a rising instalment.

Can I pay extra?

Usually — but confirm whether extra payments reduce the term or the instalment. The first saves far more interest, and lenders often default to the second.

Rates, fees and transfer costs vary by market and lender and change without notice — confirm current figures locally. General information, not financial advice.