Monthly Interest Formula:
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Monthly interest from AER (Annual Equivalent Rate) calculates the monthly interest earned on a principal amount based on the annual interest rate, taking into account compound interest effects over monthly periods.
The calculator uses the monthly interest formula:
Where:
Explanation: This formula converts the annual interest rate to an equivalent monthly rate, accounting for the compounding effect over 12 months.
Details: Understanding monthly interest helps investors and savers track their earnings, compare different savings products, and make informed financial decisions about their investments.
Tips: Enter the principal amount in pounds and the AER as a percentage. Both values must be positive numbers for accurate calculation.
Q1: What is the difference between AER and APR?
A: AER (Annual Equivalent Rate) shows the interest you'll earn on savings, while APR (Annual Percentage Rate) shows the cost of borrowing including fees and interest.
Q2: Does this calculation assume monthly compounding?
A: Yes, the formula assumes interest is compounded monthly, which is common for most savings accounts.
Q3: Can I use this for daily interest calculations?
A: For daily interest, you would need to adjust the compounding period to 365 days instead of 12 months.
Q4: What if my interest is paid annually instead of monthly?
A: If interest is paid annually, you would simply divide the annual interest by 12, but this doesn't account for compounding effects.
Q5: How accurate is this calculation for variable rate accounts?
A: This calculation assumes a fixed AER. For variable rate accounts, the actual monthly interest may fluctuate with rate changes.