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Home› Interest Rate Impact Calculator

Interest Rate Impact Calculator

Even a 1% difference in interest rate can cost tens of thousands over a loan term. See exactly what a rate change means for your monthly payment, total interest, and total amount repaid.

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Rate Comparison Results

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Extra Total Interest at Higher Rate

Base Rate

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Monthly payment
Total interest—
Total repaid—

Compare Rate

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Monthly payment
Total interest—
Total repaid—

The Difference

Extra monthly cost—
Extra total interest—
Extra total repaid—
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Rate Comparison Table

Interest Rate Monthly Payment Total Interest Total Repaid
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Why Rates Matter

On a 25-year mortgage, a 1% rate difference can cost over $50,000 in extra interest. Shopping around for even a 0.25% better rate is worth the effort.

Fixed vs Variable

This calculator assumes a fixed rate for the full term. Variable/tracker rates will fluctuate, so your actual total could be higher or lower.