Here’s how much a 40-year mortgage would save you each month vs. a 30-year loan. And the ultimate cost.

The U.S. home-financing market has been dominated by the 30-year fixed-rate mortgage loan for decades.

Now some key players in the U.S. housing market think it is time to give home buyers the option of stretching loans out to 40 years. The lower monthly payments might help some borrowers handle home-price inflation. Then again, it may not be worth adding another 10 years of loan payments.

Below…