Choosing between a 15- and 30-year mortgage is one of the biggest money decisions inside the biggest money decision. The 15-year saves an enormous amount of interest and builds equity fast; the 30-year cuts the monthly payment nearly in half and leaves cash for everything else. Neither is wrong, but they suit very different situations.
Here is what actually separates them, and how to weigh the trade for your budget.
What the numbers show
On the same loan, a 15-year term carries a much higher monthly payment, often 40 to 50 percent more, but the total interest can be less than half. Two forces drive that: you borrow the money for half as long, and 15-year loans usually come with a lower rate than 30-year loans. The result is a dramatic difference in lifetime cost.
Put your own loan in above and the gap is often startling, tens or even hundreds of thousands of dollars in interest, which is what makes the 15-year so tempting.
The catch with the shorter term
That higher payment is a real commitment. It leaves less room for retirement saving, emergencies, and life, and unlike a 30-year loan you cannot easily dial it back in a tight month. A 30-year mortgage with extra principal payments gives you much of the 15-year's benefit while keeping the flexibility to pay only the required amount when money is short.
A 15-year mortgage is a forced savings plan. Make sure you can afford the payment in a bad year, not just a good one.
How to decide
Choose the 15-year if the higher payment fits comfortably even after you are fully funding retirement and an emergency cushion, and you value being debt-free sooner. Choose the 30-year if you would rather keep the lower required payment and invest or save the difference, or if the flexibility matters for your situation. A common middle path is a 30-year loan that you voluntarily pay like a 15-year when you can.
A longer term always lowers the monthly payment while raising lifetime interest. Judge the two on total cost and on how the payment fits your whole budget, not the monthly figure alone.
Frequently asked questions
Is a 15 or 30 year mortgage better?
A 15-year saves far more interest and builds equity faster, but the payment is much higher. A 30-year lowers the payment and adds flexibility at a higher lifetime cost. The right choice depends on whether the higher payment fits comfortably.
How much does a 15-year mortgage save?
Often half or more of the total interest versus a 30-year, because you borrow for half as long and usually at a lower rate. On a large loan that can be well over a hundred thousand dollars.
Can I get the benefit of a 15-year loan with a 30-year mortgage?
Largely, yes. Taking a 30-year loan and voluntarily paying extra toward principal shortens the payoff and cuts interest, while keeping the option to pay only the required amount in a tight month.
Why do 15-year mortgages have lower rates?
Lenders take on less risk over a shorter term and are repaid sooner, so they typically offer a lower rate on a 15-year loan than on a 30-year one.
Put your own numbers in.
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