The Interest Rate Margin Makes a Difference

This example illustrates how the margin impacts your interest rate on an adjustable rate mortgage.

When a loan adjusts the margin is added to the index to determine the interest rate. The index rate will vary over time. The margin typically is fixed for the life of the loan. It should be clearly specified in your loan documents. This example shows a mortgage with no minimum interest rate. It highlights the role of the margin by examining a very unlikely scenario, the best case scenario where the index rate goes to zero in the 2nd month and stays at zero for the duration of the mortgage. Since there is no minimum rate, the borrower will be charged the 4.5% margin beginning in the second year.

Click on the Calculate button below to generate the amortization schedule for this example or enter your own information or explore the other examples.

The Basics: The Floor Rate Matters   Margin Makes a Difference   Payment Shock

Interest Rate Caps are Important   Comparing Future Interest Rate Scenarios

Common Loan Types: 1/1 ARM    3/1 ARM    5/1 ARM    7/1 ARM    10/1 ARM

Other Examples: 2/28    3/27    5/25

Adjustable Rate Calculator
Loan Amount$
Loan Term years
Starting Interest Rate%
Interest Rate Index & Margin
 
Current Index %
Margin %
First Rate Adjustment
Interest Rate is Fixed for months
Maximum Rate Increase%
Subsequent Rate Adjustments
Adjustments Everymonths
Maximum Rate Increase%
Life of the Loan Limits
Minimum Interest Rate%Maximum Interest Rate%
Future Interest Rate Scenarios
Best Case
(Index Rate Goes To Zero in 2nd Month)
Stable
(Index Rate Stays Same for the Life of the Loan)
Worst Case
(Index Rate Increases to the Maximum in 2nd Month)
  = Required

 

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