The most expensive financial decision most people make is buying or renting a home, and the easiest way to regret it is to start looking before you know your number. Getting the budget right protects you from years of strain. This guide shows how to work out what you can genuinely afford — before, not after, you fall in love with a property.
How much house can you afford?
Affordability is driven by your income, existing debts and the deposit you can put down — not by the maximum a lender is willing to offer. A common guideline keeps your home loan EMI within about 30–40% of net income, with all your debts combined under 50%. Borrowing to the lender's ceiling leaves no room for rate rises, emergencies or life changes. The home affordability calculator turns your income and obligations into a sensible price range.
The deposit and loan-to-value
Your deposit determines how much you borrow, and the loan-to-value ratio (LTV) — the loan as a percentage of the property price — affects both your interest rate and whether you need mortgage insurance. A larger deposit means a lower LTV, a better rate, smaller repayments and less total interest. Aiming for at least a 20% deposit is a sound target where you can manage it. The down payment calculator and loan-to-value calculator help you plan it.
The deposit is not the only upfront cost
Buyers routinely budget for the deposit and EMI and forget everything else. Stamp duty and registration alone can run to several percent of the price; add legal fees, brokerage, a home inspection, and the cost of furnishing and moving, and the true cash needed at purchase is well above the deposit. Build a clear list of these one-off costs before you commit, so you are not forced to borrow more or raid your emergency fund on completion day.
Ongoing costs of ownership
Once you own the home, the bills do not stop at the EMI. Property tax, maintenance or society charges, home insurance and a repairs fund all recur, and they rise over time. A rough rule is to set aside about 1% of the home's value each year for maintenance. Factoring these in is what separates a comfortable purchase from one that leaves you 'house poor' — owning the home but unable to afford anything else.
Renting: the 30% rule
If you are renting, a widely used rule keeps rent within about 30% of your gross income, leaving room for savings and other costs. Stretching beyond it is the most common cause of monthly money stress and the reason many people cannot save. Renting is not 'wasted money' — it buys flexibility and frees you from maintenance and large upfront costs — so choose it deliberately, not apologetically. The rent affordability calculator shows a comfortable rent for your income, and the car affordability calculator applies the same discipline to your next vehicle.
Buying versus renting
Whether buying beats renting depends on how long you will stay, local prices versus rents, and what you would do with the money a purchase ties up. Buying rewards those who stay put for many years, because the heavy upfront costs are spread over a long period; for shorter stays, renting and investing the difference often wins. There is no universal answer — run your own numbers rather than following the 'rent is throwing money away' slogan.
Get pre-approved before you shop
Before you start viewing properties, get a loan pre-approval (or sanction) from a lender. It tells you the exact amount you can borrow, strengthens your negotiating position with sellers, and saves you from falling for homes outside your range. Pre-approval also surfaces any problems with your credit profile early, while you still have time to fix them. Treat the sanctioned amount as a ceiling, not a target — just because a bank will lend you a sum does not mean borrowing all of it is wise. Knowing your real number before you shop is the single best protection against an emotional, over-stretched purchase.
When to refinance
Already have a home loan? If interest rates fall or your credit improves, refinancing to a lower rate can save a great deal over the remaining term — but weigh the savings against the processing and legal fees, and against how many years you have left, since refinancing late in a loan saves little. The refinance savings calculator shows whether switching is genuinely worth it for your situation.