Emergency fund or repay the loan? The arithmetic
The answer depends almost entirely on the interest rate, and on one thing that no interest rate captures.
Published 28 May 2026 · 5 min read
The rate decides most of it
Repaying a loan gives you a guaranteed return equal to its interest rate. No market risk, no uncertainty. That is a genuinely high bar for any investment to clear.
| Debt | Typical rate | Usual answer |
|---|---|---|
| Credit card balance | 36% to 42% a year | Clear it immediately. Nothing beats this |
| Personal loan | 12% to 20% | Clear it before investing |
| Car loan | 9% to 12% | Usually clear it, or at least prioritise it |
| Education loan | varies, often lower | Depends on rate and any tax relief |
| Home loan | commonly 8% to 9% | Usually not urgent. See below |
A rough dividing line: anything above about 12% should generally be cleared before investing. Below that, the arithmetic becomes a genuine comparison rather than an obvious answer.
Why a home loan is different
A home loan usually carries the lowest rate you will ever be offered, is a very long tenure, and may carry tax relief depending on your regime and circumstances.
Prepaying it gives you a guaranteed return of roughly its rate. Equity over long periods has historically returned more, with real risk and no guarantee. Neither answer is obviously correct, and the choice is closer to a temperament question than a mathematical one.
Two things do argue for prepaying anyway. Prepayment early in the tenure removes disproportionately more interest, because early instalments are mostly interest. And being debt free has a value that does not appear in any spreadsheet, particularly if your income is not secure.
The part the arithmetic misses
The sequence that avoids this is not either-or.
- Build one month of expenses in cash first. A starter buffer, so small problems stop becoming new debt.
- Then clear high interest debt, anything above about 12%, aggressively.
- Then complete the emergency fund to three to six months, or more if your income is variable.
- Then decide between prepaying lower rate debt and investing, based on the rate and on how much certainty you want.
The order matters more than the split. Each step protects the one after it.
A worked comparison
Illustrative. Ravi has Rs 50,000 spare, a home loan at 8.5%, and four months of expenses already saved.
- Prepay the home loan: a certain 8.5% return, plus interest saved over the remaining tenure, plus one less obligation.
- Invest in equity: an uncertain return that has historically been higher over long periods, with the possibility of being down 30% in any given year.
Since his emergency fund is already adequate, either choice is defensible. If his job were insecure, prepayment or additional cash would be the better answer regardless of the arithmetic, because reducing a fixed monthly obligation matters more than an expected return when income is uncertain.
That is the general principle worth taking away. The arithmetic tells you the expected outcome. Your circumstances tell you how much certainty you need. Both matter, and the second one is usually decisive.