MortgagesLetter M

Mortgage Discount Points

Upfront fees paid directly to the lender at closing in exchange for a permanently reduced mortgage interest rate.

Overview & Practical Application

Mortgage Discount Points (commonly referred to as "buying down the rate") allow homebuyers to prepay interest upfront at closing to secure a lower interest rate over the lifetime of their loan.

- 1 Point Cost: Equals exactly 1.00% of the loan amount (e.g., on a $300,000 mortgage, 1 point costs $3,000). - Rate Reduction: Typically lowers the mortgage interest rate by 0.25% (25 basis points), though exact reductions vary depending on lender market conditions.

The primary financial decision when evaluating points is the Break-Even Period: calculating how many months of monthly payment savings are required to recoup the upfront cash spent at closing.

Mathematical Formula & Calculation

Break-Even Period (Months) = Total Cost of Discount Points / Monthly Payment Savings

Divides the upfront dollar cost of points by the monthly payment reduction.

Variable Definitions:

Total Cost of Points=Points percentage * Total principal loan amount
Monthly Payment Savings=Standard monthly P&I payment minus reduced P&I payment

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Interactive Financial Calculator

Test real-world numbers and see instant underwriting results.

Base Loan Amount ($)

Nominal Interest Rate (%)

Upfront Lender Closing Fees ($)

Nominal Note Rate6.250%

Effective True APR6.402%

ℹ️ True APR reflects the cost of borrowing including $4,500 in upfront fees over 30 years.

Real-World Underwriting Example

Scenario: On a $300,000 30-year loan, you pay 1 point ($3,000) to lower your interest rate from 6.50% ($1,896/mo) to 6.25% ($1,847/mo), saving $49/month.

Calculation:

Break-Even Period = $3,000 / $49 = 61.2 months (approx 5.1 years).

Takeaway: If you plan to live in the home for longer than 5.1 years, buying the discount point saves money. If you sell or refinance before 5.1 years, you lose money.

Key Underwriting Takeaways

Discount points are essentially prepaid interest and are often tax-deductible on primary residences.
Only beneficial for borrowers who intend to hold the mortgage past the calculated break-even point.
Different from "Origination Points", which are lender service fees that do not reduce the interest rate.

Overview & Practical Application

Mathematical Formula & Calculation

Variable Definitions:

Interactive Financial Calculator

Real-World Underwriting Example

Key Underwriting Takeaways

Related Financial Terms

Annual Percentage Rate (APR)

Closing Costs

Amortization

Basis Points (BPS)

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