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Buying a home · 2 min read

Calculate a simple mortgage-points break-even

Show the upfront-cost difference and monthly-payment difference, then state the limits of the shortcut.

Editorial illustration of a garden balance with a golden seed on one side and growing fruit on the other.

A simple points break-even compares extra upfront cost with an assumed monthly payment reduction. Divide the extra cost by the monthly reduction to find the number of months needed to recover that cost under those assumptions. It is a shortcut, not a complete loan recommendation.

Use comparable written scenarios

Ask for scenarios with the same loan amount, term, and other relevant basis. Keep points, lender credits, and other fee differences separate. The CFPB explains how points and lender credits relate upfront costs to the interest rate; your actual offers need their own figures.

A fictional calculation

InputAmount
Additional upfront cost in scenario B$3,000
Monthly payment reduction in B$60
Simple break-even$3,000 ÷ $60 = 50 months

At 36 months, the assumed payment reduction totals $2,160, less than the $3,000 extra cost. At 60 months, it totals $3,600, which is $600 more than that cost. These are arithmetic illustrations, not predictions of your actual outcome.

Understand what the shortcut omits

The calculation does not model the time value of money, tax treatment, principal-balance differences, refinancing, sale, changing costs, or alternative uses of the upfront cash. If the monthly difference is zero or negative, this simple recovery calculation does not produce a useful positive break-even.

Working template

Calculate a simple break-even from these comparable scenarios.
Show extra upfront cost divided by monthly payment reduction.
If the reduction is zero or negative, explain why the shortcut does not apply.
State the omitted factors and keep all assumptions visible.
Do not recommend paying points or predict how long I will keep the loan.
Scenario figures and sources: [paste]

Turn the result into questions

Ask the lender which charges differ, how the payment reduction was calculated, and whether the scenarios use the same terms. Discuss your circumstances with an appropriate adviser before making a consequential choice.

A break-even table can help you understand a tradeoff, but it should not hide uncertainty about how long you will keep the loan or what other costs matter. Save the written scenarios with the calculation so the figures can be checked again.

References and further reading

The examples and templates above are original. These references support the definitions and documented behavior discussed in the guide.