How Other Debt Affects Couples
His car loan: 5.2% APR, $350/month. Her student loans: 4.5% APR, $280/month. Neither is keeping anyone up at night. Both are being paid on time. Everything looks fine.
But that's $630/month in combined payments going to past decisions instead of future goals.
Why couples are especially vulnerable to this leak
When two people combine finances (even loosely), their individual debts combine too. And low-interest debt has a specific property that makes it easy to ignore as a couple: it's not hurting, so nobody raises it.
The car loan is fine. The student loans are fine. The personal loan from the kitchen renovation is fine. Each one is individually manageable. But collectively, they might represent $700-$900/month in payments that the household treats as fixed costs. They're not fixed. They're temporary obligations that could, once cleared, redirect significant monthly capacity toward shared goals.
For couples specifically, the accumulated drag is often larger than either partner realizes because each person only tracks their own debt. Partner A knows about the $350 car payment. Partner B knows about the $280 student loan. Neither has added them up as a household line item of $630/month.
What this actually looks like
Combined take-home: $9,000/month. After rent ($2,400), groceries ($800), utilities ($350), and other bills ($500), you have $4,950 of capacity. Combined debt payments: $630/month. That's 12.7% of your remaining capacity going to past purchases. Without the debt, you'd have an extra $7,560/year for a house deposit, investments, or the goals you keep saying you'll start "soon."
What to do about it
The Leak Ladder puts other debt at rung six. For couples, the starting point is making the combined number visible. Add up every debt payment across both partners. See the total. Then decide together whether to accelerate payoff or prioritize investing alongside it.
Take the Know Your Digits quiz to find out if this leak is active in your finances.