Free Mortgage Points Calculator (2026)
Discount points purchase breakeven timeline. Calculate instantly — no signup required. Updated for 2026.
What Is a Mortgage Points Calculator?
A mortgage points calculator is a specialized home loan planning tool designed to evaluate the financial viability of purchasing discount points. When securing a mortgage, lenders offer you the option to buy "discount points" (often called mortgage points) at closing in exchange for a lower, permanent interest rate on your loan. Each mortgage point typically costs exactly 1% of your total loan amount and reduces your interest rate by approximately 0.25%.
Buying points represents paying interest upfront rather than monthly over the life of the loan. To determine if this strategy is smart, you must calculate the **Breakeven Point** — the exact number of months of monthly savings required to recover the upfront cash paid for the points. If you plan to sell the home or refinance your mortgage before reaching this breakeven month, buying points is a financial loss. Our mortgage points calculator runs the exact numbers to optimize your closing strategy.
How to Use This Mortgage Points Calculator
To calculate your mortgage points breakeven, enter the following loan details:
- Loan Amount: The principal balance of your mortgage (e.g., $300,000).
- Base Interest Rate (%): The default interest rate offered by the lender with zero points.
- Points to Purchase: The number of discount points you are considering (usually between 0.5 and 2.0).
- Reduced Interest Rate (%): The lower interest rate offered in exchange for the points.
The calculator instantly processes the loan parameters, displaying the upfront cost of the points, your monthly payment savings, and the exact breakeven month.
The Mortgage Points Formulas
First, the upfront cost of the points (C_points) is calculated:
Cost of Points = Loan Amount × (Points to Purchase / 100)
Next, the monthly payment with zero points (M_base) and with points (M_reduced) is computed using the standard mortgage formula. The **Breakeven Horizon (N_months)** represents the payback period:
Breakeven Horizon (Months) = Cost of Points / (M_base − M_reduced)
Step-by-Step Practical Example
Let’s calculate the breakeven point for a $300,000 conventional mortgage:
- Loan Amount: $300,000
- Base Interest Rate: 6.75% (monthly payment = $1,945.79)
- Points to Purchase: 1.0 point (costs $3,000)
- Reduced Interest Rate: 6.50% (monthly payment = $1,896.20)
Step 1: Calculate the upfront cost of the points
Cost of Points = $300,000 × 1% = $3,000
Step 2: Calculate the monthly savings
Monthly Savings = $1,945.79 − $1,896.20 = $49.59 per month
Step 3: Apply the breakeven formula
Breakeven Horizon = $3,000 / $49.59 ≈ 60.5 months (approx. 5 years)
This shows that buying 1.0 point costs $3,000 upfront and saves you $49.59/month. You will break even in **60 months (5 years)**. If you plan to remain in the home for 10 or 20 years, buying points is highly profitable; if you plan to move in 3 years, you should choose the zero-points option.
Key Takeaways
- Mortgage points are upfront fees paid to the lender at closing to secure a permanently lower interest rate.
- Each point costs 1% of the loan amount and typically reduces your interest rate by 0.25%.
- Only buy points if you plan to keep the mortgage past your calculated breakeven month.
Frequently Asked Questions
What is the difference between discount points and origination points?
Discount points are prepaid interest fees paid voluntarily to permanently lower your mortgage interest rate. Origination points are mandatory administrative fees charged by the lender to cover the costs of processing, underwriting, and preparing your loan. Both appear at closing, but only discount points lower your interest rate.
Are mortgage discount points tax-deductible?
Yes. In the United States, mortgage discount points are generally tax-deductible as home mortgage interest, provided you itemize deductions. For a primary residence purchase, points are usually fully deductible in the tax year they are paid. For a refinance, the deduction must be spread out evenly over the life of the loan.
How much does 1 mortgage point lower your interest rate?
While there is no legal requirement, the mortgage industry standard is that 1 discount point costs 1% of your loan principal and reduces your interest rate by 0.25% (or 25 basis points). Lenders adjust these metrics based on market conditions, and you can often buy fractional points (e.g., 0.5 points for a 0.125% rate drop).
What is the average breakeven period for mortgage points?
The average breakeven period for buying discount points is typically between 5 and 7 years (60 to 84 months). Because this is a relatively long timeline, buying points is highly recommended for buyers purchasing their permanent "forever home," but is financially risky for buyers who plan to move or refinance within a few years.
Is it better to put more money down or buy discount points?
In most scenarios, putting more money down is superior because it directly reduces your loan principal, which lowers your interest accumulation, reduces your monthly payment, and can help you eliminate private mortgage insurance (PMI). However, if you have already put 20% down to eliminate PMI, buying points can be an excellent secondary way to lower your rate.