Monthly Extra Payment vs Year-End Lump Sum: Which Saves More?
Same total amount, very different outcomes. Here's why spreading prepayments monthly almost always beats a year-end lump sum.
Many borrowers ask: "If I can pay extra, should I pay every month or pay one lump sum at year-end?"
In most cases, monthly extra part payment saves more interest because your principal starts reducing earlier.
Why Timing Matters
Home loan interest is calculated on the outstanding principal every month. If principal drops earlier, interest is calculated on a lower base for more months.
Example (Same Total Extra Amount)
Loan Outstanding: ₹40,00,000 · Interest Rate: 8.5% p.a. · Extra Budget: ₹1,20,000/year
Option A: Monthly Extra Part Payment
Pay ₹10,000 every month along with EMI.
Option B: Year-End Lump Sum
Pay ₹1,20,000 once at the end of the year.
Both options pay the same total extra. But Option A reduces principal earlier every month, so interest keeps reducing throughout the year. Option B gives that benefit only after 12 months.
Simple Interest Impact View
- Monthly extra payment starts saving interest from Month 1
- Year-end lump sum starts saving interest only after Month 12
- Over a long tenure, early reduction compounds into significantly larger savings
Practical Rule
If your cash flow allows it, prefer monthly extra part payments over waiting for a year-end lump sum.
Tip: Set an auto-transfer for monthly extra payment on salary day. This builds discipline and maximizes interest savings.
Test both options in the Loan Blaster projection and compare closure date and total interest side by side.
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