Keeping the House in a Boston Divorce: When It Makes Financial Sense and When It Quietly Doesn’t
By Janice Berner, CDFA, CPA, MBA | High Net Worth Divorce Financial Planning, Boston & Eastern Massachusetts
In nearly every divorce I work on as a high net worth divorce financial planner in the Boston area, the family home is the asset that generates the most emotion and the least financial analysis. I understand why. The house is where children grew up, where holidays happened, where a life was built. The desire to keep it is not irrational. But when that desire drives a settlement without a clear-eyed look at what the home actually costs to own on a single income, what the tax consequences of keeping it versus selling it are, and what the rest of the post-divorce financial picture looks like, the house that felt like a victory in the negotiating room can quietly become a source of financial pressure that compounds for years.
Boston-area real estate makes this decision particularly consequential. In communities like Newton, Wellesley, Brookline, Lexington, and Lincoln, a family home purchased ten or fifteen years ago may have appreciated by a million dollars or more. The equity is real. So are the carrying costs, the tax exposure, and the illiquidity of that equity until the home is eventually sold. Understanding all of those dimensions before agreeing to keep the house is the only way to make a decision that holds up financially over time.
The Carrying Cost Question That Most People Ask Too Late
The first question is the most practical: can you afford the house on your post-divorce income, and what does that actually mean for the rest of your financial life? Carrying costs for a high-value Boston-area home extend well beyond the mortgage payment. Property taxes in Wellesley average over $15,000 annually. Homeowner’s insurance on a high-value property, maintenance reserves, utilities, landscaping, and periodic capital expenditures like roof replacement or HVAC systems add meaningfully to the monthly and annual cost of ownership. A home with a $4,500 mortgage payment and $3,000 in additional monthly carrying costs requires $7,500 per month in cash flow before a single dollar goes to any other living expense, retirement savings, or investment.
For a spouse who was not the primary earner during the marriage, the transition from a dual-income household to a single-income household supporting those carrying costs is the calculation that determines whether keeping the house is viable. Alimony and support payments are part of that income picture, but they are not permanent, and Massachusetts alimony reform tied term lengths to the duration of the marriage. A ten-year marriage produces general term alimony capped at roughly seven years under the 2011 Alimony Reform Act. If the house requires the alimony income to sustain its carrying costs, the post-alimony financial picture requires a separate analysis that most people are not running at the time of settlement.
I build a post-divorce cash flow model for every client before any decision about the house is made final. That model shows the carrying costs as a percentage of projected income, the impact on retirement savings capacity, and what the financial picture looks like not just in year one but in year five and year ten. The house that is manageable today on the current settlement structure may become genuinely difficult when alimony ends, when children age out of the household, or when an unexpected expense requires drawing on reserves that are already thin because too much of the marital estate was tied up in real estate.
The Equity Is Real, but It Is Not Liquid
One of the most persistent misconceptions in divorce settlement negotiations is that home equity functions like a financial account. It does not. A $900,000 home with a $300,000 mortgage has $600,000 in equity, but that equity cannot pay a bill, fund a retirement account, or cover an emergency without either selling the home or taking on debt against it through a home equity line or a cash-out refinance. Both of those options have their own costs and conditions.
The liquidity trap in divorce looks like this: one spouse takes the home as their primary marital asset and offsets their share of the investment and retirement accounts to the other spouse as part of the trade. The spouse who took the house is now holding most of their net worth in a single illiquid asset with significant carrying costs, while the spouse who received the financial accounts has a diversified, liquid, and growing portfolio. Five years out, the gap between those two financial positions is frequently striking, and it was entirely foreseeable at the time of settlement.
This is not an argument against keeping the house. It is an argument for understanding what you are trading when you do. If the home equity will eventually be monetized through a planned sale, if the carrying costs are comfortably within the post-divorce income picture, and if enough liquid assets remain after the home offset to sustain an investment portfolio and an emergency reserve, keeping the house can be a sound financial decision. The analysis has to be done explicitly, not assumed.
The Capital Gains Exclusion Window and Why Timing Matters
The tax consequences of the home are not static. Under IRC Section 121, a married couple selling their primary residence can exclude up to $500,000 in capital gain from federal income tax, provided both have owned and lived in the home as their principal residence for at least two of the five years prior to the sale. After divorce, each individual is entitled to a $250,000 exclusion, but only if they continue to meet the ownership and use requirements.
For a Boston-area couple with significant appreciation in the home, the difference between the $500,000 joint exclusion and the $250,000 individual exclusion is a real number. A home with $700,000 in capital gain sold while both spouses still qualify for the joint exclusion generates $200,000 in taxable gain. The same sale after divorce, if the departing spouse has already lost their two-year use qualification, may generate $450,000 in taxable gain for the spouse who kept the house. At a combined federal and Massachusetts rate that can approach 28 to 29 percent for high earners, the tax cost of that timing difference is over $70,000.
A provision in the tax code offers some relief for the spouse who moves out of the marital home before the divorce is finalized: if a separation agreement or divorce decree grants the other spouse the right to use the home, the spouse who has moved out can be treated as using the home for purposes of the Section 121 exclusion as long as their spouse is using it as a principal residence. This provision, sometimes called the use-by-agreement rule, allows the departing spouse to preserve their exclusion eligibility during the divorce process. It does not survive indefinitely, and it has specific conditions that must be documented correctly. But it creates a planning window that is worth identifying early in the process.
The cost basis of the home matters too. A home purchased in 2003 for $500,000 in Newton or Lexington may carry current market value well above $1.5 million, depending on the neighborhood. The cost basis can be adjusted for capital improvements made during the ownership period, provided those improvements were documented and actually extend the useful life or add value to the property. Routine maintenance does not qualify. Kitchen renovations, additions, and system replacements generally do. Tracking that basis carefully is part of the financial preparation that reduces the eventual tax bill when the home is sold.
What Happens If the Real Estate Market Shifts
Boston-area real estate has appreciated significantly over the past two decades, and there is reasonable basis for expecting the region’s long-term demand to remain strong. That said, a settlement built entirely on the assumption that current market values will hold indefinitely is a settlement that has not accounted for real risk. Homes are not risk-free assets. They are concentrated, illiquid positions in a single market, and the financial consequences of a market correction fall entirely on the owner.
A spouse who accepted a reduced share of liquid marital assets in exchange for full ownership of the family home has made an implicit bet on the Boston real estate market. If the market appreciates, they benefit. If it stagnates or declines during a period when they need to sell, the equity that anchored their settlement may be worth considerably less than it appeared at the time of the agreement. The financial modeling I provide for clients includes scenario analysis across different home value trajectories so that the decision to keep the home is made with an understanding of the range of possible outcomes, not just the current appraised value.
Rising interest rates add a dimension to this analysis that has become more relevant in recent years. A spouse who needs to refinance the marital mortgage into their own name in order to release their former spouse from the liability may find that the monthly payment at current rates is substantially higher than what the couple was paying on their original loan. What was affordable as a shared obligation at a 3 percent rate may be genuinely difficult as a solo payment at 7 percent on the same principal. Running the refinance scenario with current rate assumptions, rather than assuming the existing mortgage terms will transfer, is part of the financial due diligence that this decision requires.
When Keeping the House Actually Does Make Sense
None of this is an argument against keeping the house. For many couples, particularly when children are involved and stability during the transition period is a genuine priority, keeping the house for a defined period makes both financial and personal sense. The key is that the decision is made with full information rather than on the strength of attachment alone.
The cases where keeping the house tends to work well financially share some common features. The carrying costs represent a manageable fraction of post-divorce income without relying exclusively on alimony. Sufficient liquid assets remain after the home offset to maintain an investment portfolio and an adequate emergency reserve. A defined timeline exists for when the home will be sold or refinanced, which prevents open-ended illiquidity. And the capital gains exposure has been analyzed so that the eventual sale does not produce a tax surprise that undermines the financial benefit of the equity accumulated during ownership.
A transitional arrangement, where one spouse continues to occupy the home for a specified period while both remain on the deed, with a planned sale at a defined future point, can also preserve the joint exclusion window and give the occupying spouse time to stabilize financially before transitioning to different housing. These arrangements require careful legal drafting and financial modeling, but they are a viable middle path for couples where an immediate sale does not serve the family’s interests.
Getting a Clear Financial Picture Before the Home Decision Is Final
Attorneys can negotiate who gets the house. Real estate professionals can tell you what it is worth today. What neither of them can provide is the integrated financial analysis that answers whether keeping the house is the right decision for your specific post-divorce financial life: the carrying cost modeling, the capital gains scenario planning, the liquidity assessment, and the long-term cash flow projection that puts the home decision in the context of everything else you are agreeing to at the same time.
That analysis is what I provide as a high net worth divorce financial planner working with couples in the Boston area. The house question rarely has one right answer. But it always has a set of financial facts that should be on the table before anyone commits to an answer, and those facts look different for every couple depending on the income picture, the rest of the asset division, the tax exposure, and the timeline they are working with.
If you are working through a collaborative divorce in Boston, Wellesley, Wakefield, or elsewhere in eastern Massachusetts and the family home decision is still unresolved, I am glad to walk through the financial analysis with you. A clearer picture of what each option actually costs is the foundation of a decision you can feel confident about.
