Mortgage Points Calculator

The Economics of Buying Mortgage Points

Buying mortgage discount points is essentially a financial arbitrage decision: you're choosing between paying more upfront to reduce long-term interest costs or keeping that cash and accepting higher interest charges. The mathematics are straightforward but the decision requires careful consideration of your circumstances. Consider a $300,000 loan at 6.5% for 30 years with a monthly payment of $1,896. Buying two points for $6,000 reduces your rate to 6%, dropping your payment to $1,799—a monthly savings of $97. Your break-even point is 62 months (just over 5 years). If you stay in the home for the full 30-year term, you'll save $34,920 in interest minus the $6,000 paid for points, netting $28,920. That represents a 482% return on your $6,000 investment over 30 years, or about 5.7% annually—guaranteed and risk-free. That's attractive compared to bonds or savings accounts. However, this assumes you keep the mortgage for 30 years, which most people don't. The average homeowner refinances or moves every 7-10 years. If you refinance in 7 years, you've saved $8,148 in interest but paid $6,000 for points—only $2,148 net benefit, a 36% return over 7 years (4.5% annually). Still decent, but not spectacular. If you move in 4 years (before breaking even), you've saved $4,656 but paid $6,000—you lose $1,344. This illustrates why your planned holding period is crucial to the points decision.

Opportunity Cost: Points vs. Alternative Uses of Cash

The decision to buy points isn't just about break-even timelines; it's about opportunity cost—what else could you do with that money? That $6,000 for points could serve multiple purposes. If you have credit card debt at 18%, paying that off provides an immediate 18% guaranteed return—far better than the 5-7% effective return from points. If you lack an emergency fund, keeping that $6,000 in savings provides financial security that prevents expensive borrowing during hardship. If your employer matches 401(k) contributions and you're not maxing it out, the 50-100% immediate return from the match dwarfs mortgage point returns. Even investing in an S&P 500 index fund, which has averaged 10% annually over long periods, might beat the points' return, though with market risk. The points decision also ties up cash that could be used for a larger down payment, potentially eliminating PMI—which might save more than the reduced interest from points. Another consideration is liquidity: once you pay for points, that money is locked in your house, inaccessible without selling or refinancing. If you might need cash for home repairs, medical expenses, or other emergencies, keeping funds liquid has value beyond pure financial return calculations. The optimal strategy for many borrowers is using a tiered approach: first maximize employer 401(k) match, pay off high-interest debt, build an emergency fund, make a 20% down payment to avoid PMI, then consider points if extra cash remains. Points make most sense for financially secure borrowers with excess cash who plan to stay long-term in the home.

Strategic Considerations: When Points Make Exceptional Sense

While points require careful break-even analysis for most borrowers, certain scenarios make them particularly attractive. If you're buying a forever home—a place you plan to stay for 15+ years—points become increasingly valuable as the cumulative savings far exceed the upfront cost. Retirees downsizing to their final home often find points attractive because they have equity from their previous home to pay the points and want the lowest possible monthly payment for their fixed-income budget. High-income earners who can deduct the points and are in the highest tax brackets effectively get a government subsidy on the points cost, improving the return. In high-interest-rate environments, points become more valuable because the rate reduction saves more in dollar terms; reducing from 8% to 7.5% saves more monthly than reducing from 4% to 3.5% on the same loan amount. Conversely, points are less valuable in low-rate environments—when rates are already at 3-4%, paying thousands to reduce to 2.75-3.75% produces smaller dollar savings and longer break-even periods. Market timing matters too: if you're buying when rates are elevated but expect them to drop soon, skip the points and plan to refinance when rates fall; you'd lose the points value when refinancing. Some lenders offer permanent point buy-downs (reducing the rate for the loan's life) versus temporary buy-downs (reducing the rate for 1-3 years then reverting to the original rate); make sure you understand which you're getting. Finally, some borrowers use a hybrid strategy: buy one point instead of two, reducing both upfront cost and break-even time while still capturing some benefit—a middle ground that balances upfront cost, monthly savings, and uncertainty about future plans.