I need help thinking through the finances of our home ownership with my partner. We are not married, and we keep separate finances, but I manage them for both of us. My goal has always been for things to be fair 50/50. In 2014, I bought a house in my name only, which we lived in. The intention was always for it to become a rental when we found a "forever home".
In 2017, we found a house we thought we liked and we had it titled/mortgaged in his name only, bought for $854k. I contributed half the down payment, and since then have always paid for our other life expenses equivalent to the mortgage/taxes/insurance, which he pays 100%. Along the way, we decided we don't like this house and have since bought another place in both our names. Anticipating this, in late 2021, we changed the title of the 2017 house to be 50/50 and he wrote a loan note to me for $550k, which we feel was a reasonable estimate of 1/2 the house price at the time ($1.1M). This was because we realized without me on the title, we'd be missing out on $250k of cap gains exclusion.
We are now planning to sell the 2017 house in 2025. I estimate the house to now be valued at $1.5-1.6M. Since signing the loan note between us, I have continued contributing our life expenses as always. To keep things fair, does it make sense that the loan amount should have been paid down by the amounts I've been contributing?
When we sell, does it make sense that 100% of the outstanding mortgage should be paid out of his half of the proceeds, and then the remaining amount of the outstanding note amount between us be transferred from my proceeds to him? Somehow, following this process, the end proceeds to him are still a lot more than to me.
We are planning to spend a ton of the proceeds on a major renovation of our new place, so maybe it doesn't matter?