Divorce Financial Planning Worksheet: Budget for Life After Divorce

The Budget Nobody Wants to Build

Divorce splits one household economy into two. That's not a metaphor — it's a math problem. The same combined income that covered one mortgage, one set of utilities, one grocery bill, and one insurance policy now has to stretch across two of everything, often increasing combined living costs.

Building a post-divorce budget before you negotiate anything is the single most practical step you can take. Without one, you're negotiating blind — agreeing to spousal support amounts, property splits, and debt allocations based on what feels reasonable rather than what the numbers actually support.

Step 1: Map Your Current Combined Finances

Before you can plan for two households, you need an accurate picture of the one you're leaving. Gather the last 12 months of bank statements, credit card statements, and receipts for both spouses. Track every category:

Fixed monthly costs: Mortgage or rent, car payments, insurance premiums (health, auto, home, life), minimum debt payments, child-related expenses (tuition, daycare, extracurriculars), and subscription services.

Variable monthly costs: Groceries, utilities, gas, dining out, personal care, clothing, entertainment, medical co-pays, pet expenses, and home maintenance.

Annual or irregular costs: Property taxes (if not escrowed), vehicle registration, holiday spending, vacation, professional dues, tax preparation, and home repairs.

Add it all up. That's your household's actual spending baseline — and a complete record is usually more reliable than either spouse's memory.

Step 2: Build Two Separate Budgets

Now split that combined picture into two individual budgets. Each one needs to cover:

Housing. If one spouse keeps the marital home, that budget absorbs the full mortgage, taxes, insurance, and maintenance. If both spouses will rent, research current rental costs in your area for the space each person needs.

Health insurance. The spouse covered under the other's employer plan will need independent coverage. COBRA continuation coverage in the U.S. can require you to pay the full plan cost plus an administrative charge, and continuation is time-limited. Marketplace plans vary widely by state and income level.

Transportation. If the household shared one car, someone needs a second vehicle. If both already have cars, maintenance and insurance costs still need to be allocated.

Child-related expenses. These don't split neatly. Medical costs, school supplies, extracurricular fees, and clothing needs don't halve just because the child moves between two homes. If anything, duplicated supplies (two sets of school materials, two wardrobes) increase total costs.

Debt service. Each spouse needs a plan for their share of marital debt. If one spouse takes on the credit card balance and the other takes the car loan, map the monthly payment obligations into each budget individually.

Step 3: Identify the Gap

Subtract each post-divorce budget's total expenses from that person's individual income (including projected support payments). If income minus expenses is negative, that gap needs to be closed through one of three mechanisms: negotiating a larger share of liquid assets, securing adequate spousal support, or reducing expenses.

This is where the budget becomes a negotiation tool. If your post-divorce budget shows a $1,200 monthly shortfall, that is a concrete basis for presenting your needs, but it does not by itself establish entitlement to $1,200 or determine what a court will order.

In Canada, spousal support calculations often use the Spousal Support Advisory Guidelines (SSAG), which provide a formula-based range. In the UK, courts consider the Section 25 factors, including each party's financial needs and resources. In Australia, Section 75(2) of the Family Law Act lists similar considerations. The budget you build is the raw material for any of these frameworks.

Step 4: Model Scenarios

Don't build just one budget — build three:

Scenario A: You keep the house, your spouse pays support at the amount you'll request, and you return to work at a realistic starting salary.

Scenario B: You sell the house, split the proceeds, and each rent. No spousal support or a reduced amount.

Scenario C: A middle path — you keep the house for two years (deferred sale), receive transitional support, and plan to be fully self-supporting by year three.

Running the numbers on each scenario before negotiation starts tells you which outcomes are financially sustainable and which ones look fine on paper but collapse six months in. The Divorce Settlement Negotiation Guide includes a financial planning worksheet with pre-built formulas for all three scenario types, so you can compare the results side by side and bring hard numbers into your first negotiation session.

Common Budgeting Mistakes

Ignoring taxes. For federal U.S. tax purposes, spousal support (alimony) is tax-neutral under the Tax Cuts and Jobs Act for agreements executed after December 31, 2018 — the payer doesn't deduct it, and the recipient doesn't include it in income. But in Canada, support payments are generally taxable income to the recipient and deductible for the payer. Failing to account for the tax treatment of support can throw off your entire post-divorce budget.

Underestimating the cost of re-establishing credit. If most accounts were in your spouse's name, you may need to build credit from scratch. Higher interest rates on credit cards and loans during that period increase your real cost of borrowing.

Forgetting inflation. A spousal support agreement that works today may be inadequate in three years. If support has a fixed end date, your budget should model what happens when it stops — not just what happens while it's flowing.

Overlooking retirement. Every dollar you spend now on living expenses is a dollar that isn't going into retirement savings. If you're 45 and haven't been contributing to retirement during the marriage, you need to factor catch-up contributions into your long-term plan.