Debt vs Invest Planner
Model both paths side by side and see which one builds more net worth over your chosen horizon.
Problem
A good investment return is not automatically better than a guaranteed interest saving.
Promise
Compare whether surplus cash should prepay a loan or stay invested over your decision horizon.
Trust note
No login. The calculation uses client-side loan math and editable return assumptions.
Tool mode
Basic keeps the fast default flow. Advanced unlocks goal seek, sensitivity sweep, and a second comparison scenario.
Debt snapshot
Capital allocation choice
Main answer
₹95,861
Investing comes out ahead by about ₹95,861 over 8 years. The assumed return is high enough to outrun the debt cost in this scenario.
The comparison assumes a ₹3,00,000 lump sum and a 11% annual return assumption over 8 years.
Current EMI
₹30,663
Loan closes in 10.0 years without extra prepayment.
Prepay path net worth
-₹45.3K
Includes ₹3,90,123 of interest saved.
Invest path net worth
₹50.5K
Built from a projected corpus of ₹7.2L.
Break-even timing
No break-even
First year where the prepay path matches or beats the invest path.
Estimated net worth by year
Interest saved by prepaying
₹3,90,123
This is the guaranteed cost avoided on the debt side.
Expected invested corpus
₹7.2L
This depends entirely on the return assumption you entered.
Loan closes earlier by
1.9 years
Relevant if you plan to redirect EMI into future investing.
How to read this tool
This planner works best when you already know the loan rate, remaining tenure, and the lump sum you could either invest or use to prepay.
It does not try to predict markets. It simply makes the trade-off visible so you can choose with less guesswork.
Why the result leans this way
Return assumptions are fragile
A 1% to 2% change in expected return can flip the recommendation, so do not use aggressive market assumptions just to justify investing.
Guaranteed savings matter
Loan prepayment acts like a fixed post-tax return equal to the interest rate avoided, which can be valuable when markets feel uncertain.
Assumptions and sources
Debt vs invest model
The investment path assumes a lump-sum investment today, while the prepayment path invests EMIs only after the faster-payoff loan is closed.
Effective from 2026-04-01
Scope note
Taxes on investment gains and loan processing fees are not included in the MVP model.
Effective from 2026-04-01
Frequently asked questions
When does prepaying debt usually win?
Prepayment looks stronger when the loan rate is high, the remaining tenure is long, or you value certainty more than market upside.
When can investing beat prepayment?
Investing can win when you have a long horizon, a manageable loan, and realistic after-tax return assumptions that exceed the loan cost by enough margin.
Does this planner include investment risk?
No. It compares expected outcomes, not guaranteed ones. Use a lower return assumption if you want a more conservative view.
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