I think it's a terrible idea.
I don't even like the idea of a 30-year. Those end up raking up an amount of interest that I would consider predatory.
If we even operate on the generous assumption that a 50-year loan would have the same interest rate as a 30 (which is unlikely)
(While I know some people hate AI, I did task it with crunching some numbers to see how much interest people were paying for various mortgage terms for different loan durations.)
For a $250,000 home....
| Term | Rate | Monthly Payment (approx) | Total Payments | Approx Interest Paid |
|---|
| 15 yr | 5.70% | ~$2,061 | ~$2,061 × 180 = ~$370,980 | ~$370,980 − $250,000 = ~$120,980 |
| 20 yr | 6.06% | ~$1,676 | ~$1,676 × 240 = ~$402,240 | ~$402,240 − $250,000 = ~$152,240 |
| 30 yr | 6.22% | ~$1,532 | ~$1,532 × 360 = ~$551,520 | ~$551,520 − $250,000 = ~$301,520 |
| 50 yr | 6.22% | ~$1,473 | ~$1,473 × 600 = ~$883,800 | ~$913,800 − $250,000 = ~$633,800 |
I think it's pretty obvious, the choices people should have are 15 yr and 20 yr.
When you make that jump from a 20 to a 30, that's where the "lower monthly payment" benefit really diminishes, and where the "whoa! that's a lot of total interest" really kicks into full gear.
Getting a payment that's $400 less per month at the expense of paying back an additional 30k over a period of 20 years is an acceptable trade-off.
That jump in interest between a 20 and a 30 is staggering, and the only benefit in that different term length is a $140/month reduction in the monthly payment. -- not worth it at all.
While I'm not a finance guy and not an economist (so there may be things I'm overlooking), I would be all in favor of a stipulation/law that stated that an FDIC lending institution shouldn't be able to offer loan terms that involve the total interest paid exceeding the amount of the actual amount being borrowed.
Whatever happens between two people privately is between them (for instance, if my brother wanted to borrow $100, and I told him "okay, but you gotta pay me back $250 two months from now", that's a different story), but for government-backed institutions, they shouldn't be the business of usury.
Now, there are tips and tricks for getting your home paid off quicker even on a 30-year (that the banks obviously don't want you to know about), but speaking as a person who's happy to say that mine was officially paid off as of August (woo-hoo) while still in my 40's, they're something that should be taught in high school.