Daily Interest Formula:
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Daily student loan interest is the amount of interest that accrues on your loan balance each day. Most student loans use simple daily interest, meaning interest is calculated daily based on your current balance.
The calculator uses the daily interest formula:
Where:
Explanation: The formula converts the annual rate to a daily rate by dividing by 365, then multiplies by the current balance.
Details: Understanding daily interest helps borrowers see how interest accumulates between payments, plan repayment strategies, and understand the impact of making extra payments.
Tips: Enter your current loan balance and annual interest rate (as a percentage, not decimal). Both values must be positive numbers.
Q1: Does interest compound daily on student loans?
A: Federal student loans use simple daily interest, meaning interest doesn't compound daily. It only compounds when unpaid interest is added to the principal.
Q2: How can I reduce my daily interest?
A: Making payments that reduce your principal balance will lower your daily interest. Even small additional payments can make a significant difference over time.
Q3: Why divide by 365 instead of 360?
A: Most student loans use actual/365 day count convention. Some private loans may use 360 days - check your loan terms.
Q4: How does this relate to monthly interest?
A: Monthly interest is approximately daily interest multiplied by the number of days in the billing cycle (typically 30-31 days).
Q5: Does the interest rate change affect daily interest?
A: Yes, if you have variable rate loans, any rate change will immediately affect your daily interest calculation.