Mortgage Points Break-Even Calculator
Months to recoup the cost of buying down your rate.
Calculate your mortgage points break-even period. Enter upfront points cost and monthly savings to find how many months to recoup your investment.
What this tool does
This calculator models the payback period for mortgage rate buydowns. It takes your upfront points cost, the monthly payment reduction those points deliver, and your remaining mortgage term, then calculates how many months of savings are needed to recover the initial expense. The result shows both the break-even point—when cumulative monthly savings equal what you paid upfront—and the total savings across your full remaining mortgage term. Monthly payment saving is the primary driver: larger reductions shorten the payback period significantly. A typical scenario involves comparing whether paying points now makes financial sense given how long you plan to keep the mortgage. The calculator uses a simple payback method and does not account for the time value of money, inflation, or opportunity costs of the upfront capital. Results are for illustration only and do not account for tax implications, refinancing possibilities, or changes to interest rates.
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Formula Used
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Disclaimer
Results are estimates for educational purposes only. They do not constitute financial advice. Consult a qualified professional before making financial decisions.
Paying points means handing over cash upfront to reduce the rate. One point is typically 1% of the loan. The question is always: how long to recoup that cash in lower payments. A 3,000 point cost that saves 40/month breaks even at 75 months — 6.25 years. A 10-year hold without refinancing recoups the cost; moving at year 5 leaves it unrecouped.
Quick example
With upfront points cost of 3,000 and monthly payment saving of 40 (plus remaining mortgage months of 300), the result is 75 months. Change any figure and watch the output shift — it's often more useful to see the pattern than to memorise the formula.
Which inputs matter most
You enter Upfront Points Cost, Monthly Payment Saving, and Remaining Mortgage Months. Not every input has equal weight. Adjusting one input at a time toward extreme values shows which ones move the result most.
What's happening under the hood
Break-even month = upfront cost divided by monthly saving. Ignores time value of money — strict payback period. The formula is listed in full below. If the number looks off, you can retrace the calculation by hand — that's the point of showing the working.
What the headline rate hides
Lenders quote a rate; what you pay is a blend of that rate, fees, insurance, and any early-repayment penalty built into the product. The figure here isolates the core interest cost so you can compare like-for-like across deals; fees, insurance, and other costs sit on top of that base.
What this doesn't capture
The figure shown reflects the core calculation; additional costs such as arrangement fees, valuation, legal fees, insurance, and any early-repayment charges (where applicable) sit on top and can add materially to the total cost of borrowing. Rates and product terms can also change over the life of the loan, which can shift the picture relative to this fixed-snapshot estimate.
Buying £3,000 in points costs 75 months to break even against £40 in monthly savings.
Inputs
This example uses typical values for illustration. Adjust the inputs above to match a specific situation and see how the result changes.
Sources & Methodology
Methodology
The calculator divides the upfront cost of purchasing mortgage rate points by the monthly payment saving generated by the lower rate. This yields the break-even month at which cumulative savings equal the initial expenditure. The computation treats both the upfront cost and monthly saving as fixed values, applying a simple payback period model that does not account for the time value of money, interest earned on savings, or variation in interest rates over time. The result assumes the mortgage remains active through the break-even point and that monthly savings remain constant. The calculator does not model refinancing scenarios, early repayment, changes in loan terms, or tax implications of interest deductions.
References
Frequently Asked Questions
Are points always worth it?
Is there a tax angle?
Does refinancing reset the clock?
Are points negotiable?
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