11/15/2025
Is the 50 year mortgage a good or bad thing?
As you may already know, there is talk about doing a 50 year mortgage to help make housing more affordable. Some of you have reached out asking me for details and what I think about it.
Here's the CliffsNotes/X style answer...
1. It's a wolf in sheep's clothing. It looks good at first glance, but it's bad for homebuyers/consumers in pretty much every other way.
2. I think it's one of the dumbest real estate related ideas I've heard in my 21 year career. We shouldn't be using additional consumer debt to try to get out of the housing affordability problem.
And here’s why I say that...
Let's start with the actual numbers and what they mean for homebuyers and homeowners.
First of all, the longer the term of the loan, typically the higher the interest rate. A 15 year mortgage has a lower interest rate than a 30 year mortgage. The same principle would apply to a 50 year mortgage.
I've heard folks guessing as to how much higher the interest for the 50 year mortgage may be. Most are guessing it would be at least .5% higher, but less than 1% higher.
That's for two reasons.
The first reason is that the average difference between a 15 year and 30 year fixed rate conventional mortgage is between .6% and .75% and using a similar formula leads to a similar difference.
The second reason is that a .5% higher rate on a 50 year mortgage provides the homeowner with a savings on their monthly payment while a 1% higher rate actually makes the monthly payment higher.
At the end of the day, the banks are going to want to see a higher rate to reflect the longer term of the loan, but the rate can't be so high that it becomes more expensive for consumers per month.
The first chart below shows the actual monthly payment difference of a 50 year mortgage at both a .5% and 1% higher rate using a 10% down payment at three different purchase prices - $300K, $600K and $900K.
As you can see, at .5% of a higher rate, home buyers will have a lower monthly payment than with a 30 year mortgage. But, at 1%, they will have a higher monthly payment.
So a 50 year mortgage at a .5% higher rate is better for consumers and should lead to more people buying homes…right?
Right?!
Not so fast. Let's take a look at the entire picture and the fine print below it.
Besides a lower monthly mortgage payment, a .5% higher rate on a 50 year mortgage also means the following,
- Additional interest (a LOT of it). Even at a .5% higher interest rate, the total interest is more than double that of a 30 year mortgage. Just the additional interest of a 50 year mortgage over a 30 year mortgage is hundreds of thousands if not well over a million dollars.
- Much slower equity and wealth creation. An even higher percentage of your monthly payment goes toward interest meaning that it will take you about twice as long to build the same amount of equity (and wealth) with a 50 year mortgage than a 30 year mortgage (see second chart below).
- With equity being built at a much slower pace, there's a much higher chance of becoming "upside down" if there's a turn in the market. And being "upside down" is not a good thing for homeowners with many that are "upside down" simply handing in their keys even if they could make the monthly payments (remember all of the "strategic" foreclosures during the GFC/Great Recession 2007-2010?).
In addition to the three disadvantages I noted above, there are several other direct and indirect disadvantages to a 50 year mortgage. Those are related to potential emergency funds, wealth creation, retirement funds, potential emergency funds, and others. But I'll leave that to your financial planner (or AI) to explain as I am neither a financial planner nor an accountant.
At the end of the day, the 50 year mortgage does more for increasing consumer debt and eroding consumer wealth while producing more profit for banks and lenders than it does for making housing more affordable. In fact, I would argue it has very little to nothing to do with making housing more affordable.
I would love to hear what your thoghts about a 50 year mortgage. And if I missed something, please let me know. I'm always happy to chat over the phone or over a cup of coffee.
Daniloheb