What is the Rent vs Buy Calculator?
The rent versus buy question is usually argued on the wrong basis. Rent is not simply money wasted, and a mortgage payment does not all become equity — a large share of early payments is interest, which is exactly as unrecoverable as rent.
This calculator follows both paths month by month. The buyer pays the EMI and upkeep and owns a home that changes in value; the renter pays rent and invests the down payment, the buying costs and any month's difference. At the end it compares what each is worth.
What each input means
- Home price
- The price of the home you would buy, comparable to the one you would rent.
- Down payment
- Cash you put in up front. If you rent instead, this money is invested at the return you enter.
- One-time buying costs
- Stamp duty, registration and similar charges, as a share of the price. A renter keeps this money and invests it.
- Home loan rate
- The rate on the loan for the rest of the price.
- Loan tenure
- The repayment period. It sets the EMI and how much of the loan is still owed when the comparison ends.
- Yearly upkeep
- Maintenance, property tax and insurance as a share of the home's value each year.
- Yearly home price growth
- How fast the home's value rises. It is the input that most often decides the answer, so try a cautious figure as well.
- Monthly rent for a similar home
- What you would pay to rent the same kind of home today.
- Yearly rent increase
- How much the rent rises each year.
- Return on money you invest instead
- What the renter's savings earn: the down payment and buying costs from day one, plus any month in which renting costs less than owning.
- How long you plan to stay
- The comparison ends here. It counts the home's value minus the loan still owed; selling costs and tax on a sale are not included.
How this calculation works
Each month the buyer's outgoings are the EMI plus upkeep on the home. Whichever side spends less that month invests the difference at the return you enter, so neither path gets credit for money it did not have. At the end, the buyer's net worth is the home's value minus the loan still owed plus anything invested, and the renter's is the investment pot.
Buying involves costs a renter never pays: stamp duty and registration, maintenance, property tax, insurance, and the opportunity cost of capital tied up in a down payment. Renting involves paying for shelter without building equity, but it also leaves that capital invested and keeps you mobile.
Formula: Buying: home value − loan left + anything invested. Renting: down payment and buying costs invested, plus any monthly difference
Getting the most out of the result
- Compare total monthly cost of ownership — instalment, maintenance, tax and insurance — against rent, not instalment alone.
- Include the opportunity cost of the down payment. That capital could be earning elsewhere.
- Weigh how long you will stay. Transaction costs mean buying rarely pays off over short horizons.
- Remember that only the principal portion of an instalment builds equity, and early on that portion is small.
- Value flexibility honestly. If your work or family situation may change within a few years, renting has real worth.
Common mistakes to avoid
The framing error is treating rent as waste and a mortgage as saving. Interest, property tax, maintenance and insurance are all unrecoverable, and in the early years they can approach or exceed the rent on a comparable home. Buyers also omit the opportunity cost of the down payment and the transaction costs of purchase, which can consume years of notional gain. Buying with a short expected stay is the most reliably expensive version of this mistake.
Frequently asked questions
Is buying always better than renting long term?
Not always. It depends on the price-to-rent ratio in your area, the mortgage rate, how long you stay, and what you would otherwise do with the capital. In expensive markets with high prices relative to rents, renting and investing the difference can genuinely come out ahead.
How long do I need to stay for buying to make sense?
Long enough for appreciation and equity building to exceed the transaction costs of buying and selling. Those costs are substantial, which is why short stays rarely justify purchase. Several years is a common minimum.
Is rent really money down the drain?
No more than mortgage interest, property tax, maintenance and insurance are. Rent buys shelter for a period. The fair comparison is unrecoverable cost against unrecoverable cost, not rent against the whole instalment.
What is the price-to-rent ratio?
The purchase price divided by annual rent for a comparable property. High ratios suggest renting is relatively attractive; low ratios favour buying. It is a quick sanity check on a specific local market.
Should the down payment opportunity cost be included?
Yes. Capital in a down payment is not available to invest elsewhere, and over a long period that forgone return is a genuine cost of ownership that most comparisons leave out.
Does buying protect against rising rents?
To a degree. A fixed-rate mortgage fixes the largest housing cost while rents rise, though property taxes, maintenance and insurance still increase. A floating-rate mortgage offers less protection than people assume.
What non-financial factors matter?
Stability, freedom to modify a home, and the security of not being asked to leave weigh toward buying. Mobility, freedom from maintenance, and not being tied to one location weigh toward renting. These are real considerations, not tie-breakers.