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⚙ Interactive calculator — use inputs above to calculate instantly.
Mortgage discount points are upfront fees paid to your lender to permanently reduce your interest rate. One point = 1% of your loan amount. Typically, each point reduces your rate by 0.25% (varies by lender). The question is whether the monthly payment savings justify the upfront cost — this is the break-even calculation.
| Loan Amount | Points | Cost | Rate Reduction | Monthly Savings | Break-Even |
|---|---|---|---|---|---|
| $400,000 | 1 | $4,000 | 0.25% | ~$57/mo | 70 months (5.8 yrs) |
| $400,000 | 2 | $8,000 | 0.50% | ~$114/mo | 70 months (5.8 yrs) |
| $500,000 | 1 | $5,000 | 0.25% | ~$72/mo | 69 months (5.75 yrs) |
Buy points if: you plan to stay in the home past the break-even period (typically 5-7 years), you have extra cash at closing, rates are high and you want long-term payment certainty, and you can deduct points on your taxes (points on a home purchase are typically fully deductible in year paid). Do not buy points if you may move or refinance within 5 years — you will not recoup the upfront cost.
Points paid on a home purchase loan are generally deductible in the year paid for your primary residence if they represent normal points for your area and are paid directly by you. Points on refinances must be amortized over the loan life. Points on investment properties are deducted as business expenses. Always verify with your tax advisor as rules have nuance.
Use this calculator as a starting point, not a final answer. Run three scenarios: pessimistic (lower returns, higher costs, worst-case tax rates), base case (your expected scenario), and optimistic (favorable conditions). The range between these three scenarios tells you how much uncertainty surrounds your plan and how much buffer you need.
Once you have your numbers, cross-reference them with complementary calculators. A mortgage payment should be checked against your overall budget and DTI ratio. A retirement projection should account for Social Security income, potential pension, and healthcare costs in retirement. Tax calculations should be checked against available deductions and credits you may qualify for. No single calculator captures everything.
Where you hold investments matters as much as what you hold. High-growth assets belong in Roth accounts where growth is tax-free. Income-producing assets like bonds belong in traditional 401(k) or IRA where taxes are deferred. Tax-managed index funds belong in taxable brokerage where you can harvest losses. This asset location strategy adds 0.2-0.4% annually to after-tax returns without changing your investments at all.
The lifetime value of proper tax planning for a median American household is approximately $150,000-300,000 in additional wealth at retirement — the difference between tax-smart and tax-naive investment management over 30 years. Most of this benefit comes from three decisions made once: choosing the right account types, maximizing employer match, and selecting low-cost index funds.