What counts as mortgage interest and how do I calculate it
Below is a MRR and PLR article in category Finance -> subcategory Mortgage.

Understanding Mortgage Interest: What It Is and How to Calculate It
Summary:
A mortgage is a loan taken out to purchase property, either for a primary or secondary residence. When you borrow money for a home, you'll incur mortgage interest, which is the cost of borrowing the loan. This guide explains how to understand and calculate mortgage interest.
What is Mortgage Interest?
When you secure a loan to purchase land or a residential property, either as a primary or secondary residence, it’s known as a mortgage. Essentially, a mortgage represents the debt you owe for acquiring the property. The lender charges interest on the borrowed amount, known as mortgage interest, which is a key element of the loan repayment.
Types of Loans Involving Mortgage Interest
Mortgage interest applies to several loan types, including:
- Primary home loans
- Second mortgages
- Home equity loans
- Lines of credit
Mortgage interest is the amount you pay in addition to the principal loan amount.
How to Calculate Mortgage Interest
Calculating mortgage interest involves several key elements:
1. Loan Amount: The total amount borrowed can range from thousands to millions, depending on the property's cost.
2. Interest Rate: This percentage varies based on lender policies and regulations. It can be as low as a few percentage points or higher depending on various factors.
Example Calculation:
Suppose you have a $315,000 mortgage with a 6.5% interest rate. To find the annual interest:
- Convert the interest rate into a decimal: 6.5% becomes 0.065.
- Multiply the loan amount by this decimal: $315,000 x 0.065 = $20,475.
This $20,475 is the annual interest. To find the total interest over the life of the loan, multiply the annual interest by the loan term in years.
Formula:
- Annual Interest Calculation:
Loan Amount (L) x Interest Rate (I) = Annual Interest (A)
- Total Interest Calculation:
Annual Interest (A) x Loan Term in Years (Y) = Total Interest (TI)
If you want to find out how much interest you've paid over a specific period, multiply the annual interest by the number of years you've been paying the mortgage.
Factors Affecting Mortgage Interest
- Monthly Payment: A higher monthly payment typically reduces total interest because you're paying off the principal faster.
- Loan Term: Shorter loan terms generally lead to less total interest paid.
Conclusion
Understanding how mortgage interest is calculated helps you make informed decisions about purchasing property and managing your loan. By knowing the factors that influence interest costs, you can potentially save money over the life of your mortgage.
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