Cost of Divorce Calculator: Legal Fees + Running Two Households
Beyond the asset split, two homes cost about 1.6× one and legal fees run $5K-$50K. A financial-picture estimate of the one-time and 10-year costs — not legal advice.
The cost most people underestimate isn't the lawyer
Legal fees get the attention — and they range from a few thousand for an uncontested filing to $15,000–$50,000+ each in a contested one. But the bigger long-run number is usually the loss of economies of scale. The same logic that makes living together cheaper works in reverse: splitting one household into two doesn't halve costs, it roughly multiplies them by 1.5–1.6×. Two rents, two utility bills, two of everything.
On a $5,000-a-month shared household, each person's own place can cost about $4,000 — a $1,500 monthly increase per person that quietly compounds. Over a decade that ongoing delta dwarfs the one-time legal bill. Seeing both side by side is the point: the headline fee is visible, the structural cost is the one that reshapes a budget for years.
How the math works
- Asset split: marital assets × your share (default 50/50). The rest transfers to the other party.
- One-time costs = legal fees + the cost of setting up a second home (deposit, furniture, moving).
- Ongoing increase: two households cost the current one × a multiplier (default 1.6). Each person carries about half the grossed-up total, so the monthly increase ≈ ½ × household × (multiplier − 1).
- 10-year cost = one-time costs + 120 months of that increase.
Source: Nolo on divorce legal fees, the US Census on household economies of scale, and USDA food-cost data for per-person household estimates.
The honest limit: this deliberately omits the hardest, most variable items — spousal and child support, custody arrangements, dividing retirement accounts, and the tax change from joint to single filing. Those can swamp everything modeled here, in either direction. Read the output as "the baseline structural cost," not a forecast of your settlement.
Math runs locally. Inputs never leave your browser. Source on github.
Where this calculation doesn't apply
- There are minor children. Child support and custody can dominate the financial picture and follow strict state formulas this tool doesn't model. Treat the estimate as incomplete.
- One spouse earns far more. Spousal support (alimony) can transfer large sums for years, changing both parties' real ongoing position well beyond the household-split math here.
- Most wealth is in retirement accounts or a business. Dividing a 401(k) needs a QDRO; valuing a business is its own process. Asset "splits" aren't always clean 50/50 cash.
- It's an amicable, DIY uncontested split. Then legal fees may be minimal and the second-household cost is the whole story — set legal fees low and focus on the ongoing delta.
What to actually do
- Use it to understand the structural cost — the ongoing two-household increase — before any conversation, so you're not blindsided by the long-run number.
- Get a real fee quote from a local family-law attorney; the legal-fee slider is a placeholder for your actual situation and state.
- Build or check your emergency fund first — the transition period is when a cash buffer matters most.
- For anything involving support, custody, or retirement accounts, the answer comes from professionals, not a calculator. This is the starting frame, not the plan.