One-Income Check
Two households cost more than one, and the arithmetic is better done on paper than discovered in March. This works out what a month costs on one income, how much of that is fixed, and what each result usually means next.
Rough figures are fine. Nothing here is financial advice, and where a decision has a lease or a court order attached, that belongs with someone licensed where you live.
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Where the four steps come from
The grouping above follows the CFPB's budgeting guidance, which now sits in the agency's archive and walks through it in four steps: "Step 1: Where does my money come from?", "Step 2: Where does my money go?", "Step 3: What are all my bills and when are they due?" and "Step 4: Create your working budget." Their bill calendar exists for the specific problem of money arriving on a different day from when it is needed, which is the thing that turns a workable month into an overdraft.
What this cannot tell you
It does not know about the one-off costs of separating, which distort the first year badly enough that people assume they will never recover: deposits, legal fees, a second set of everything, a car. It also does not know what is coming, and the year after a separation has more surprises in it than most.
What it is good for is the shape: whether the gap is small enough to close by adjusting, or large enough that the housing decision is the real question.
What to read next
- Money after a divorce, for credit files, joint debts, retirement accounts, and the ten-year Social Security rule.
- What to do with the house, if fixed costs are dominated by housing.
- Setting up a place of your own, for what the second household actually costs to start.
- Trial separation rules, if you are working out who pays what while living apart.
Frequently asked questions
How do I work out a budget after a separation?
Start with what arrives rather than what you earn, then separate fixed costs from living costs. The CFPB's budgeting guidance walks through the same four steps: where the money comes from, where it goes, what the bills are and when they are due, and then a working budget.
Why do my costs go up so much when I separate?
Rent, utilities, and insurance rarely halve when a household does, and several costs that were shared quietly become one person's: one internet bill, one car, one grocery run. Losing the second income and the shared cost at the same time is what makes month two a surprise.
What if the numbers do not work at all?
That is information about a lease and a salary rather than a verdict on you. The order that helps is housing first, then utilities and insurance, then unsecured debt last, and contacting a landlord or servicer before a payment is missed rather than after.
Is anything I type here stored?
No. The calculation runs in your browser, and nothing is sent to a server, saved, or shared. Closing the tab clears it.