When you take a home loan, the bank asks: "For how many years?" Most people pick the tenure with the smallest EMI. But the smaller the EMI, the bigger the interest. Take a ₹30 lakh loan at 8.5% a year:
| Tenure | Monthly EMI | Total interest | Total payment |
|---|---|---|---|
| 10 years | ₹37,196 | ₹14,63,485 | ₹44,63,485 |
| 15 years | ₹29,542 | ₹23,17,594 | ₹53,17,594 |
| 20 years | ₹26,035 | ₹32,48,327 | ₹62,48,327 |
| 25 years | ₹24,157 | ₹42,47,044 | ₹72,47,044 |
| 30 years | ₹23,067 | ₹53,04,266 | ₹83,04,266 |
The biggest lesson
Going from 20 to 30 years lowers the EMI by only ₹2,968, but total interest rises by about ₹20.6 lakh. To save about ₹3,000 a month, you pay instalments for 10 more years.
Look at it the other way too: choosing 15 years instead of 20 raises the EMI by ₹3,507 but cuts interest by about ₹9.3 lakh.
Which tenure should you pick?
- Keep the EMI under 30-40% of your in-hand salary. Above that, other spending and savings get squeezed.
- A longer tenure plus prepayments later is a flexible approach: the EMI stays small in hard times, and when a bonus or extra money comes in, you cut the principal.
- Check your age. Banks usually want the loan to end before retirement.
The truth about the early years
On a 20-year loan you pay ₹3.12 lakh in EMIs in the first year, of which about ₹2.53 lakh is pure interest; the principal falls by only ₹59,707. That is why prepayments in the early years save the most interest.
Working: ₹30,00,000 loan, 8.5% a year, monthly EMI; processing fees and insurance not included.
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Frequently asked questions
Can I change my home loan tenure later?
Yes. Most banks let you reduce the EMI or the tenure after a prepayment, and in some cases extend the tenure. Ask your bank for its terms.
Is a 30-year loan ever a good idea?
If the EMI is very heavy today and you have a firm plan for regular prepayments, 30 years gives flexibility. Without prepayments it is the most expensive option.