Interest Saved Formula:
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Definition: This calculator determines how much interest you can save by making a lump sum payment toward your mortgage principal.
Purpose: It helps homeowners understand the financial benefits of making additional mortgage payments.
The calculator uses the formula:
Where:
Explanation: The difference between original and new interest amounts shows your savings from the lump sum payment.
Details: Understanding potential savings helps homeowners make informed decisions about using extra funds to pay down their mortgage.
Tips: Enter the original total interest and the new projected interest after making a lump sum payment. Both values must be positive numbers.
Q1: Where do I find my total interest amounts?
A: Your lender can provide amortization schedules showing both original and revised interest totals.
Q2: Does this calculator account for early payoff?
A: No, this shows interest savings only. Use a mortgage amortization calculator to see payoff timeline changes.
Q3: When is the best time to make lump sum payments?
A: Earlier payments save more interest since more goes toward principal reduction.
Q4: Are there penalties for lump sum payments?
A: Check your mortgage terms - some loans have prepayment penalties.
Q5: Should I invest instead of making lump sum payments?
A: Compare your mortgage interest rate to potential investment returns to decide.