Housing guide
Short answerSeparate the cost of living in the home from the equity the owner builds. Share what it costs to live there (mortgage interest, property tax, insurance, HOA fees and upkeep), and let the owner cover the principal part of the mortgage, unless you agree in writing that the other partner gains a share of the property.
| Method | How it works | When it fits |
|---|---|---|
| Cost of living | Share interest, property tax, insurance, HOA and upkeep | The fairest default for most couples |
| Reference rent | The non-owner pays their share of what renting a similar place would cost | When the home is paid off or interest is low |
| Split the full payment | Share the whole mortgage payment | Only if the non-owner gains equity in writing |
The mortgage payment is $2,400 a month: $1,000 interest and $1,400 principal. Property tax, insurance and HOA add $500 a month. The cost of living there is $1,000 + $500 = $1,500. Split 50/50, each partner covers $750; the $1,400 of principal is on the owner, who keeps that equity.
Paying part of the mortgage does not make you an owner. If you want it to count, put it in a written agreement reviewed by a lawyer where you live. This guide is not legal advice.
In Couplesplit, add the mortgage as a fixed payment, mark which part is shared and which is the owner’s, and the monthly balance shows who owes whom. The owner’s personal costs stay in Mine and never mix with Ours.
Contributing to the cost of living there is reasonable. Funding the principal of their property without any share is not, unless you both choose it knowingly.
It depends on local law and on whether you are married. That is why any contribution to equity should be in writing.
Then the cost of living is property tax, insurance, HOA and upkeep. Some couples add a reference rent below market rate.
Shared money, clearer
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