How Loan Interest Works

Learn how APR, principal, and repayment length influence total borrowing cost.

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$164.17

Estimated Monthly Payment

$910.03

Estimated Total Interest

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Estimated Payoff Date

How Loan Interest Works Calculator Example

Use this calculator while reading the guide to validate each concept with real numbers.

$500 $5,000 $50,000
5% 11.2% 29%

How Loan Interest Works

Interest is the cost of borrowing principal over time. In amortized loans, earlier payments are weighted more toward interest.

APR and repayment length interact: higher APR or longer terms can increase total cost even when monthly payment appears lower.

Comparing multiple terms side by side gives a clearer view of affordability versus long-term cost.

Term Comparison Table

TermMonthly Payment
12 months$442.37
24 months$233.50
36 months$164.17
48 months$129.71
60 months$109.21

Example Payment Table

Loan AmountMonthly Payment
$500$16.42
$1,000$32.83
$2,000$65.67
$3,000$98.50
$5,000$164.17
$7,000$229.83
$10,000$328.34
$15,000$492.50
$20,000$656.67

Frequently Asked Questions

Should I use one scenario or multiple scenarios?

Run multiple scenarios to understand payment risk under different terms and APR assumptions.

Where can I continue after reading this guide?

Use the linked calculators and province pages to test a realistic repayment plan.

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