"Rent is money down the drain" ignores what your down payment could have earned instead. This compares the honest version: your net worth if you buy, against your net worth if you rent and invest every rupee you didn't spend on the house.
Both paths spend exactly the same amount each month. The renter invests whatever the buyer is paying above the rent — so what you are comparing is where the money ends up, not how much of it there is. Hover, or focus the chart and use the arrow keys.
Buying starts more expensive and stays flat; rent starts cheaper and climbs. The year the orange line crosses is when renting stops being the cheaper monthly option.
An illustration, not property or investment advice. Nothing you type is sent anywhere — the whole thing runs in your browser.
The rent-to-price ratio — annual rent divided by the property price, shown above as the rental yield. It sets how much the renter has spare to invest each month. Where yields are low, renting frees up a lot of money and buying has to make it back on appreciation alone. Where yields are high, the buyer's outflow is barely above the rent, there is little left to invest, and buying wins quickly.
The second decider is the gap between property appreciation and your investment return. Property is a leveraged bet, so a small appreciation edge goes further than it looks — but leverage cuts both ways.
Long enough to earn back the buying and selling costs, which together are often a tenth of the price. That is the single most common mistake: buying with a three-year horizon. Set "how long you'll stay" to three years and look at the gap — the transaction costs alone usually settle it.
Rent buys you somewhere to live for a year, the same way loan interest buys you the use of someone else's money. Neither builds equity. On a long loan the interest paid in the early years is often close to the rent on the same property — and unlike rent, it comes with stamp duty, maintenance and a large illiquid position in a single asset on one street.
Buying can absolutely be the better decision. It is just not automatically the better decision, which is what the phrase implies.
A house is usually the largest single position anyone holds, and a loan is usually the largest liability. Zinfai tracks both — property as an asset, the loan as a liability — so your net worth reflects them, and the FIRE engine accounts for the debt you are still servicing. See how tracking works.