Add-On Interest
Definition and meaning of Add-On Interest in real estate.
Add-on interest is a method of calculating loan interest where the total interest charge is computed on the original principal amount at the beginning of the term and added to the principal before determining the monthly payments.
In more detail
Under this structure, the borrower pays interest on the entire original loan amount for the full term, even though they are gradually reducing the balance through monthly payments. This makes add-on interest loans significantly more expensive than simple interest loans, where interest is charged only on the remaining unpaid balance.
This method is rarely used in modern residential mortgages, but it can still be found in some short-term consumer loans, home improvement loans, or subprime financing agreements. Borrowers should look closely at the annual percentage rate (APR) of any add-on interest loan, as the true borrowing cost is often much higher than the advertised interest rate.
Key facts
| Category | Mortgages & Financing |
|---|---|
| Calculation Basis | Original principal amount only |
| Common Uses | Short-term consumer loans and some home improvement loans |
| Cost Comparison | Much higher true APR compared to simple interest loans |
A homeowner borrows money for a remodel with an add-on interest structure, paying interest on the full original principal for the entire duration of the loan.
Frequently asked questions
Why is add-on interest more expensive than simple interest?
With simple interest, the interest charge decreases as the principal balance is paid down, while add-on interest charges interest on the full original principal for the entire loan life.
How does add-on interest affect early repayment?
Paying off an add-on interest loan early does not reduce the total interest owed as much as it would with a simple interest loan, as the interest is already pre-calculated and added to the debt.
Is add-on interest commonly used for home mortgages?
No, standard residential home mortgages in the United States almost always use amortized simple interest, which is calculated monthly based on the outstanding principal balance.