One real difference: the rate. A 15-year almost always prices lower than a 30-year, often by around half a percent. Take the 30-year and pay it on a 15-year schedule and you land very close to the same payoff date, while paying a somewhat higher rate on the balance along the way. That gap is the price of flexibility. What the price buys is optionality, and it is worth a lot. On a true 15-year, the higher payment is required for all 180 months, through job losses, surprise expenses, and tight stretches alike. On a 30-year you are choosing to pay down faster, so the extra principal is voluntary. In a good month you match the 15-year pace. In a bad month you fall back to the lower required payment and ride it out with no stress and no risk to the loan. The honest tradeoff runs both ways. The 15-year's lower rate means it takes a bit less extra each month to hit the payoff, and a highly disciplined borrower saves some interest. The 30-year costs slightly more in rate and buys a safety valve. We lean toward the lower required payment with voluntary extra principal, because the cushion usually matters more than the small rate difference, but the right loan is the one you can sleep with. We will run both side by side for your numbers on the free Roadmap conversation.