Bought our first place in July 2021, financed $410K @ 2.75% for 30 years. I really am not trying to pay this off early, but am so naturally debt averse that the first thing I did was make a principal only payment in August before the 1st payment was even due in September. IDK, I couldn't help myself?! Here to try to keep myself on the mathematically smarter track, I guess?!
You recognize that there’s a strong mathematical advantage towards not paying down your fixed very low interest loans early. Fantastic - you are well ahead of most. What’s prompting you to make early payments is emotional, and as every economist will tell you, one shouldn’t let emotion dictate your finances.
Now you can reflect on
why you feel compelled to do something you realize is not in your best interests, and find ways to address that. For me it was the realization that it was always “either/or” - I could have less mortgage or more money to deploy whenever and however was needed. If I spent the money on the mortgage it couldn’t (easily) be used for anything else, and ultimately it became apparent there were *many* more productive places for that money for me.
Others (like my sister) feel compelled to follow the herd advice. It’s social pressure. So she set up a home sinking fund and to the outside world pretends that her mortgage balance is whatever it is minus the sinking fund. Social pressure managed.
Many others just want “the good feeling” of no mortgage payment. Strategies there can be broad - one I’ve seen as effective is to ask what excites more: a $450K home with ‘only monthly T&I payments (still substantial), or an investment account with $600,000+ in it.
Up to you to find out what works, but good that you recognize it’s not a rational desire.