Rent vs Buy Calculator

The Great Debate: Rent vs. Buy

The "Rent vs. Buy" Calculator mathematically resolves the most fiercely debated topic in personal finance. Conventional wisdom states that "renting is throwing money away" and "buying a house is always the best investment." However, mathematically, this is often completely false. Buying a home involves massive unrecoverable costs (interest, property taxes, maintenance), while renting allows you to invest your down payment into the high-performing stock market.

How the Calculator Compares Both Paths

Our engine projects your total net worth at the end of the loan tenure using two parallel universes:

Universe 1: You Buy the House

You drain your savings for a down payment. You pay a heavy monthly EMI to the bank. Over 30 years, you pay double the house's value in interest alone. However, the physical property appreciates in value. Your final Net Wealth is the appreciated value of the fully paid-off house minus everything you spent on EMIs and the down payment.

Universe 2: You Rent & Invest

Instead of locking your savings in a down payment, you invest it in an index fund generating 10-12% annually. Because your monthly rent is usually much cheaper than a mortgage EMI, you take the monthly difference and aggressively invest that into the stock market too. Your final Net Wealth is the massive compounded value of your stock portfolio minus all the rent you paid over 30 years.

The Golden Rule: The 5% Rule

If you don't want to run a complex calculation, use the 5% Rule. Take the value of the home you want to buy and multiply it by 5%. Divide that by 12. If you can rent a similar home for less than that monthly amount, renting is mathematically superior to buying.

The Mathematical Formula