In Toronto mortgages don't work this way. Fixed rate mortgages are typically 5 year terms. After the term is up they'll have to get the higher interest rate.
Well that's all up to the buyer, but most people are risk averse when it comes to their home. The default mortage term is 30 years, and most people fix the interest rate 20 or 30 years.
People who took a shorter term for the interest rate in the past 10 years, now have a housing cost of a few hundred euros, because it came down from 3-4%.
Mortgages where the amortization period and the term are equal are extremely rare in Canada. Most Canadian fix their interest for a term of 5 years (at a fixed rate or a fixed deviation from the prime rate).
I’m not saying you shouldn’t lock down these amazing rates for the long run.
I’m saying that when mortgage rates double, the cost of buying homes will effectively double. Buyers simply won’t be able to afford to pay as much and prices will plateau or even dip.
There are people paying 1M for hones in my neighborhood that sold for 500k ten years ago because their mortgage will be only $2K a month. When it’s $4K a month those buyers are gone. That’s why I’m selling soon.
There's perhaps some regional confusion here. In the U.S, with conventional 30-year fixed mortgages, amortization and term are the same (30 years). There are also adjustable-rate mortgages which have a different term, eg. a 7/1 ARM has a fixed rate for 7 years, adjust annually thereafter, and is paid off in 30 years. Although ARMs are occasionally pushed by banks, most finance sites recommend against them and savvy buyers usually steer clear, because lots of buyers got in a lot of trouble from 07-09 because of them.
I gather, from this thread, that this is not the case in Canada and some other locales. But in the U.S, if you have a fixed-rate mortgage, your interest rate is fixed for the full length of the loan. It sounds like the OP is from Europe, where I guess things work similarly.
Look at Japan's interest rates. It's not gonna happen, because it will destroy a complete country and surroundings.