The Settlement Was Fair. It Just Didn’t Survive March.

Everyone fights over whether the split is even. Almost nobody checks whether it actually works.

Two people sat across from each other and did what everyone told them was the fair thing. They split it down the middle. Every account, every asset, cut clean in half. She kept the house; he took the equivalent in savings and retirement. On paper it was as even as a divorce gets. Both attorneys signed off. Everyone went home.

By March she was underwater.

Not because anyone cheated her. The house that looked like half the marriage on a spreadsheet came with a roof, a furnace, property taxes, and a mortgage she now carried by herself. His half sat in a retirement account he couldn’t touch without a penalty, so on paper he looked fine while his checking account ran thin. The number was fair. The arithmetic of living inside it was not.

I could see that kind of thing coming long before I ever mediated a divorce, because I spent about a decade teaching math. The thing I spent ten years trying to get across to teenagers turns out to be the same thing that quietly sinks divorce settlements: the number on the page and the number in the world are not the same number.

Fair is the easy test

Most people going through a divorce pour their energy into one question. Is the split fair? Is it even? Did I get my half? It’s the number everyone can see, so it’s the number everyone fights over. And it matters. But fair and durable are two different tests, and almost every agreement gets checked against the first and never against the second.

Start with the one that undoes people most often: a dollar is not a dollar. A million dollars in a house, a million in a retirement account, and a million in a savings account are three completely different things the moment you try to live on them. One you can’t spend without selling and moving. One you can’t touch for years without a penalty and a pile of rules. One is simply money. Split those “evenly” and one person can walk away asset-rich and quietly broke while the other walks away liquid, and both believe they got half.

Taxes are the second silent partner in every settlement. Two accounts worth the same on paper can hand two people very different bills a year later, depending on what’s owed on them. Retirement money moved or pulled the wrong way comes with penalties of its own. Spousal support isn’t taxed the way it was a decade ago. None of that shows up in the column that says “even,” which is exactly why a settlement can be evenly split and lopsided at the same time.

And then there’s the plainest arithmetic of all, the one everybody knows and nobody budgets for: two households cost more than one. Two rents or mortgages, two sets of nearly everything, a second bedroom for the kids. The same income that used to run one home now must stretch across almost two. A settlement built on last year’s single-household expenses is a settlement built to run out by spring.

What actually breaks

When a settlement comes apart financially, it almost never looks like a dramatic mistake. It looks like a $1,400 car repair there’s suddenly no cushion for. A tax bill nobody flagged. A furnace that dies in February. The braces. The agreement was fair. It just didn’t survive contact with one ordinary, expensive month.

And here’s why this sits with me as a mediator and not an accountant. A settlement that fails is the single most common thing that pulls two people back into conflict a year after they thought they were finished. They’re suddenly back in each other’s inboxes, back in front of lawyers, renegotiating and resenting. If there are children, those children are now living inside the exact tension the divorce was supposed to end. The money is never really a separate, colder topic. It’s often the thing that decides whether the peace holds.

What I’d want you to take from this

If you’re heading into this, by all means make sure the split is fair. But don’t stop there, because fair is the easy test. Before you sign anything, sit down with the real numbers, not last year’s, and walk through the first year of actually living it. What does the monthly budget look like in each household once this is real? Which assets can you spend, and when? Where is the cushion? And what happens the month something breaks?

Ask your attorney. Ask a financial professional. Ask your mediator. Not just “is this even,” but “does this survive March?”

If nobody in the room can answer that yet, that isn’t a reason to panic. It’s just the next thing to build.

Colleen O’Neil is a divorce mediator and the founder of Mediation and Beyond, working with families across Connecticut. She spent nearly a decade as a math teacher and nearly a decade as a therapist before training in divorce mediation at Quinnipiac University School of Law’s Center on Dispute Resolution. She is not an attorney and does not provide legal or financial advice.