Rent vs Buy: What the Numbers Actually Say
Buying a home is usually framed as obviously better than "throwing money away on rent". That framing ignores opportunity cost: the down payment and the gap between EMI and rent could have been invested. This calculator runs both paths in parallel over your full tenure and reports the net worth difference at the end.
The cost that never appears in the brochure
The rent-is-wasted argument treats an EMI as saving and rent as spending. But a large share of an early EMI is not saving either — it is interest, and interest is exactly as gone as rent. On a twenty-year loan at 8.5%, the first few years are overwhelmingly interest, and the principal you are actually accumulating is small.
The larger omission is opportunity cost. A down payment is capital removed from every other use. If it would otherwise have been invested, the buying case has to beat not just rent but rent plus the compounded return on that capital plus the compounded return on any monthly gap between EMI and rent. That is the comparison the calculator above runs.
Costs buyers systematically forget
Stamp duty and registration are payable immediately and are not recoverable on sale. Brokerage applies at both ends. Then there is the recurring set that a tenant simply does not pay: society maintenance, property tax, insurance, and the repairs an owner absorbs — waterproofing, plumbing, the periodic replacement of things that wear out.
Averaged across a full ownership period these add a meaningful percentage to the true cost, and they are absent from almost every rent-versus-buy comparison you will read.
Why the answer is so sensitive to appreciation
Change the assumed appreciation rate by two percentage points and the result frequently flips. That sensitivity is the single most important thing to understand here, because appreciation is the input you know least about.
Property markets can stagnate for a decade. If you enter an optimistic figure because prices have risen recently, the calculator will duly report that buying wins — but you have assumed the conclusion. Run it again at a conservative rate and see whether the case survives. If it only works at aggressive appreciation, it is a bet on prices, not a housing decision.
What the arithmetic cannot tell you
A home is not purely a financial instrument. Security of tenure, freedom to alter the place, staying in one school catchment, and not having a landlord end your lease at twelve months notice are real benefits that no calculator prices.
The honest use of this tool is not to be told what to do. It is to find out what the non-financial benefits are costing you, so you can decide whether they are worth that number. Sometimes they clearly are. The point is knowing the figure rather than assuming it is zero.