How Loan Tenure Changes What You Pay

Look at what happens between twenty and thirty years. The EMI falls by ₹3,956 a month — about 11%. The total interest rises by ₹27.4 lakh — about 63%.

Those extra ten years buy less than four thousand rupees of monthly relief and cost more than twenty-seven lakh. Stated that way, the trade rarely looks attractive.

The EMI curve against tenure is steep at first and then nearly flat. Going from five years to ten years cuts the instalment substantially. Going from twenty-five to thirty barely moves it.

The reason is that beyond a certain point, almost the entire instalment is covering interest rather than reducing principal, so adding years does very little to lower the payment while adding a great deal of interest.

The practical rule that follows: there is usually a tenure beyond which extending is close to pure cost. On typical Indian home loan rates, that point arrives somewhere around twenty years.

Most Indian home loans are floating and linked to the repo rate. When the benchmark rises, lenders usually hold the EMI constant and extend the tenure instead.

This means your tenure can lengthen without you doing anything or being asked. A loan you took as twenty years can quietly become twenty-four. Check your amortisation schedule after every rate revision, and consider asking the lender to raise the EMI and hold the tenure instead.

• Work out the EMI you could still pay in a bad month — reduced variable pay, a medical expense, a period between jobs.
• Take the shortest tenure whose EMI fits inside that figure, not inside your best month.
• If the shortest comfortable tenure is very long, that is useful information about whether the purchase is affordable at all.
• You can always prepay to shorten a long tenure. You cannot easily lengthen a short one if things get difficult, so err slightly towards caution and prepay aggressively.