How to combine finances when one of you has debt

Debt one partner brings into a relationship stays in that partner's name, and the couple's only real decision is how to treat its payments. Either the payments are a personal cost, paid from that partner's own money with the shared split set to allow for it, or they are a shared cost, paid from the shared money by the same split as the rent, and both work if the choice is explicit and the payments are visible to both partners. What does not work is the third option, which is not deciding: the partner with the debt pays it quietly from a personal budget that was already short, and the couple's shared plan is built on a picture with $360 a month missing. The worked example runs $18,000 of student loans and card balances through both treatments on the same two incomes.

What the debt is, legally and practically

A loan or a card balance is owed by the person who signed for it. Moving in together or marrying does not move it to the other partner in most circumstances, and a lender cannot pursue the partner who did not sign. Practically, though, the payments come out of the household's money every month whichever account they leave from, and a couple that shares rent and groceries shares the consequences of $360 a month going to a lender.

The decision is therefore about fairness and visibility, not about liability. Both treatments below leave the debt in the borrower's name; they differ in whose money pays it and how the rest of the split is set.

The two treatments

1. Personal. The partner with the debt pays it from their own account. The shared costs are split by a rule that accounts for it, usually by setting the personal money figure after the debt payments, so the partner with the debt is not living on a fraction of the other's personal money.
2. Shared. The debt payments go on the shared list beside the rent, paid from the joint account by the same split as everything else. The partner without the debt is contributing to it on purpose, and the couple's combined saving rate is what improves when it is gone.

Both are decided together, written down, and revisited when income or the debt changes. The choice often follows the arrangement: couples with separate finances lean personal, couples with a joint account for shared bills go either way, and couples with fully combined money have already chosen shared; see Yours, mine and ours, and the three ways couples combine money.

A worked example, both treatments on the same debt

Partner B has $14,000 of student loans at $160 a month and a $4,000 card balance being paid at $200 a month, $360 in all. Take-home incomes are $3,900 for A and $2,600 for B, and the shared costs, without the debt, are $3,500 a month.

Under the personal treatment, B keeps $840 after the share and the debt, against A's $1,800, and the couple looks at that gap and decides whether it is fair for the years the debt lasts. Under the shared treatment, A contributes $216 a month toward B's debt through the split, and the personal figures are closer, $1,584 and $1,056. Neither is right in general. What is right is that both partners can see the two columns and choose one.

A common middle: the student loan stays personal, since it was for B's education and its rate is low, and the card balance goes shared for the year it takes to clear, since its rate is high and clearing it is the household's best return; see How paying off debt raises your net worth even when savings don't move.

Make the payments visible either way

Whichever treatment is chosen, the debt's balance and its payments are on the shared picture: the balance on the household's net worth sheet, the payments on the bill calendar. A debt paid personally and invisibly becomes a surprise at the first shared decision that depends on it, a mortgage application or a move. Visibility is not the same as the other partner paying; it is the household knowing what its money is doing.

Revisit when things change

The treatment is revisited when the debt changes, a card cleared or a loan refinanced, and when income changes, since the split moves with it. A debt that was personal while the borrower earned more can become shared when the other partner's income rises, and a card that was shared for a year returns to personal when it is gone and the loan remains. The monthly check-in is where it is raised; see A monthly money check-in that takes twenty minutes.

Common mistakes

• Not deciding. The debt is paid quietly from a personal budget that cannot afford it, and the shared plan is wrong by that amount.
• Treating the debt as shared without saying so. The partner without the debt discovers it in the split.
• Setting equal personal money and ignoring the debt. Under the personal treatment, the partner with the debt lives on a fraction.
• Hiding the balance. It is on the household's net worth whether or not it is on the sheet.
• Co-signing to "make it shared." That moves the liability, which the shared treatment never required.
• Letting the treatment drift. A decision made for a card at 22% is not the decision for a mortgage at 6%.

Common questions

Am I responsible for my partner's debt? Legally, not for debt in their name alone from before the relationship, and a lender cannot pursue you for it. Practically, its payments come from the household's money, and the couple decides together whether they are treated as a personal cost or a shared one.

Should we pay off one partner's debt together? If both partners choose to, yes, especially for a high-rate balance whose clearing is the household's best return. Put the payments on the shared list by the same split as the rent, and write down that it was chosen. A debt paid together by default rather than by decision is the version that causes trouble.

How do we split expenses fairly when one of us has debt payments? Set the split with the debt accounted for. Under the personal treatment, the personal money figure is set after the debt payments so the partner with the debt is not living on a fraction; under the shared treatment, the debt is in the shared list and the split covers it.

Should the debt be on our shared net worth? Yes, at its balance, on the liability side, whichever treatment is chosen. The household's net worth is everything both own minus everything both owe, and leaving a debt off makes every shared decision that depends on the figure wrong.

What if the debt is from something we disagree about? The treatment can still be personal, and the visibility is still required. A debt one partner regrets and the other resents is a debt whose payments are on the calendar and whose balance is on the sheet, paid by the borrower, until it is gone.

How Zypper handles this

Zypper puts the debt on the shared picture without deciding the treatment for you. A couple plan gives each of you a private login to one household where connected accounts belong to the household, so the student loan and the card connect and contribute their balances to the liability side of net worth, charted over time, and both partners see them; the payments are identified as recurring groups with their next expected dates, which puts them on the shared calendar. Under the personal treatment, the account the payments leave from can be left out of the budget with the Include in the budget setting, so the debt is visible in net worth while its payments stay out of the shared budget's figures. See Inviting your partner or family member, Supported account types, and Editing and removing accounts for the details, or get started with Zypper to see both columns before you choose.