A financial planner explains why splitting your partner's $2,100 mortgage will leave you with nothing. And it's okay

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Skip to navigationSkip to main contentSkip to right columnADVERTISEMENTRinna DiamantakosSun, July 19, 2026 at 4:30 PM GMT+2 5 min readLa Famiglia/ShutterstockLiving together before marriage was once a cultural taboo, but cohabitation has grown in popularity and it's reshaped relationships, families and finances.In 2024, approximately 20.4 million (1) Americans were living with their unmarried partner. And between 2020 and 2022, roughly 80% (2) of recent marriages were preceded by cohabitation.Must ReadThe trend means more couples are entering into living situations where the traditional financial protection of marriage or co-ownership isn't afforded — and this could raise possible financial questions couples must work through.Let's take the example of Emily and David, who have been in a relationship for four years. They're looking to take the next step in their partnership and finally move in together. But Emily has already bought her own home and is locked into a mortgage.Emily wants David to just move in and begin splitting her monthly mortgage payments, which are just over $2,100 a month. David, who is currently paying around $1,200 a month for rent, figures this arrangement could actually save him money since his split of the monthly mortgage payments would be lower than what he currently spends on housing.But David is worried that he could be contributing to a home he has no say in. Is this a smart move for David? And is paying for someone else's mortgage, even if it is your partner, too risky?The landlord-tenant perspectiveLegally speaking, Emily's home is hers alone. In most states, David will have no right to the home unless his name is on the deed. This means he will be contributing to her mortgage payments — and her equity — without gaining anything.If Emily eventually decides to sell the house down the road for more than what she's paid for it, David will not profit off of the sale, even though he helped pay it off.On the other hand, the arrangement means David isn't taking on any risk. If the house needs a new roof, someone is injured on the property or the home's value declines, David isn't on the hook. Those costs and liabilities remain Emily's responsibility alone.In many ways, the arrangement is the same as any landlord-tenant relationship, David is just paying rent to a different kind of landlord.Terms and Privacy PolicyEU DSA contactPrivacy & Cookie SettingsMore Info