Prepay the loan or invest the money — how to decide properly
The rate comparison everyone makes is the wrong comparison. Here is the correct one, and the reasons it still might not decide it.
You have a spare ₹5 lakh and a home loan at 8.5%. The standard answer is "invest if you can earn more than 8.5%". That comparison is wrong in three places.
Correction one: compare after-tax to after-tax
Prepayment saves you the loan rate, guaranteed and tax-free — a rupee of interest not paid is a rupee kept.
Investment returns are taxed. A 12% equity return, taxed at 12.5% on long-term gains, nets about 10.5%. A debt fund or deposit taxed at slab rate can net far less.
So the honest comparison for a 30% bracket taxpayer is 8.5% guaranteed against roughly 10.5% uncertain — a much narrower gap than 8.5% versus 12%.
Correction two: adjust for the tax deduction on the loan
If you claim the interest deduction under the old regime, your effective loan rate falls. An 8.5% loan where the interest is fully deductible at 30% costs about 5.95% net. That tilts strongly toward investing.
But the deduction is capped, and under the new regime it largely does not exist for self-occupied property. Many people quote the benefit long after they stopped receiving it.
Correction three: guaranteed is not the same as expected
8.5% saved is certain. 10.5% earned is an average across decades with drawdowns inside it. Treating those as directly comparable ignores that one of them can be negative for three years running.
Where it is not close at all
| Debt | Rate | Verdict |
|---|---|---|
| Credit card revolve | 36–48% | Clear every rupee before investing anything |
| Personal loan | 12–20% | Prepay |
| Car loan | 9–12% | Usually prepay |
| Home loan | 8–9% | Genuinely arguable |
| Education loan with deduction | 8–10% | Often worth keeping |
The debate only exists at the bottom of that table. Above it there is no debate.
Run the numbers on your loan
The part the spreadsheet cannot price
A loan is a fixed claim on your future income. Losing your job with no EMI is a different situation from losing your job with a ₹43,000 monthly obligation. If clearing the debt lets you take a lower-paying but better job, or survive a gap without panic, that flexibility is worth something the rate comparison never captures.
A reasonable compromise: keep the emergency fund intact, invest enough to keep long-term goals on track, and put the surplus into prepayment. You do not have to pick a side with the whole amount.
Where these figures come from
- Reserve Bank of India — Policy rates, lending and deposit regulation, credit card rules
Published by FinClamp. This guide is information, not financial advice — see the disclaimer.