How to use
- Replace the example inputs with your loan and property figures.
- Select Calculate to update the estimate and any schedule.
- Change one assumption at a time, then compare the result with the earlier scenario.
How this calculation works
Point cost is the loan amount times the number of points divided by one hundred. The engine calculates both payment schedules, then measures the monthly difference and accumulated interest difference at the selected horizon after subtracting the point cost.
Point cost = loan × points ÷ 100
Worked example
Illustrative inputs — not a quote or a local average.
- Loan amount
- $320,000.00
- Zero-point note rate
- 6.5 %
- Note rate with points
- 6.25 %
- Loan term
- 30 years
- Discount points
- 1 points
- Comparison period
- 7 years
Upfront cost of points: $3,200.00. Monthly payment reduction: $52.32. Simple payment break-even: 61.2 months.
Reading the result
Payment break-even is useful for a quick first comparison, but the horizon interest figure distinguishes loan repayment from borrowing cost. A borrower who expects to refinance before recovering the upfront cost should test a shorter holding period. A negative horizon result means the point option costs more under that scenario.
Before acting on the estimate
The rate reduction must come from the quote; it is not inferred from the number of points. Keep the loan amount, term and other fees equal when isolating this choice. Taxes and the return you could have earned on the upfront cash are excluded.

Questions, answered
Is one point a one-percentage-point rate cut?
No. The point is a percentage of the loan amount; its rate benefit is separately quoted.
Can points be fractional?
Yes. Enter the actual decimal amount quoted.