BuyDown Rate Calculator
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Buying down your mortgage rate through the purchase of discount points is a common strategy for homeowners looking to reduce their monthly mortgage payments. This calculator provides a straightforward method for determining the effectiveness of such a strategy by calculating the BuyDown Rate.
Historical Background
The concept of "buying down" a mortgage rate involves paying an upfront fee, or points, at closing to reduce the interest rate on your mortgage. Each point typically costs 1% of your loan amount and can lower your interest rate by a certain percentage, depending on the lender's terms.
Calculation Formula
The BuyDown Rate (BDR) formula is a simple way to determine the percentage decrease in interest rate you can expect by purchasing discount points. It is given by:
\[ BDR = \frac{CD}{S} \times 100 \]
where:
 \(BDR\) is the BuyDown Rate (%),
 \(CD\) is the cost of discount points ($),
 \(S\) is the monthly savings ($).
Example Calculation
For instance, if you spend $2,000 on discount points and save $50 per month as a result, the BuyDown Rate would be:
\[ BDR = \frac{2000}{50} \times 100 = 4000\% \]
This example highlights the importance of calculating the buydown rate to understand the longterm benefits of purchasing discount points.
Importance and Usage Scenarios
Calculating the BuyDown Rate is crucial for homeowners and buyers considering the purchase of discount points. It helps evaluate the costeffectiveness of reducing the mortgage interest rate and aids in making informed financial decisions.
Common FAQs

What are discount points?
 Discount points are upfront fees paid at closing to reduce the interest rate on your mortgage. Each point typically costs 1% of your loan amount.

How does buying down the rate affect my monthly payments?
 Buying down the rate reduces your monthly mortgage payments by lowering the interest rate on your loan, saving you money over the life of the mortgage.

Is purchasing discount points always a good idea?
 It depends on how long you plan to stay in your home and the terms offered by your lender. Calculating the BuyDown Rate can help determine if the upfront cost is worth the longterm savings.
This BuyDown Rate Calculator simplifies the decisionmaking process by providing a clear metric to assess the financial benefits of buying down your mortgage rate.