How the maths works
How to use it
- Enter your monthly take-home pay — net, not gross. If you only know your salary, get the net figure from the paycheck calculator first.
- Pick the profile that describes your situation honestly rather than aspirationally.
- Compare each bucket against what you actually spend. The gap is the plan.
A worked example
On $3,200 a month, the standard 50/30/20 gives $1,600 for needs, $960 for wants and $640 for savings and debt. If rent alone is $1,400, that split is fiction. The Tight profile (67/13/20) gives $2,144 for needs, $416 for wants and the same $640 for savings — which is a plan you can actually follow.
Where this sits in the Financial Literacy resource
A calculator tells you where you are. It does not tell you what to do next, and a number without a plan behind it tends to produce anxiety rather than progress. These stages are free, need no account, and cover the decision this calculator is measuring.
Common questions
Is the 50/30/20 rule realistic?
It assumes housing and other essentials fit inside half your take-home pay, which is not true for a large share of renters in high-cost areas. The rule is a useful default, not a law. Using a split that matches your real cost of living and keeps the savings percentage intact beats abandoning budgeting because the standard version does not fit.
What counts as a need versus a want?
A need is something whose absence causes a real problem: housing, utilities, food, transport to work, insurance, minimum debt payments, childcare, medication. Everything else is a want, including the pleasant things you would defend. The distinction only matters when money is tight — which is exactly when people blur it.
Why does the gig profile set aside more?
Self-employed and 1099 income has no tax withheld, and you owe both halves of Social Security and Medicare — 15.3% self-employment tax — on top of income tax. The 25% bucket covers that set-aside as well as savings. Treating gross gig income as spendable is the most common and most expensive mistake in variable-income work.
What this calculator is not
It is an educational model, not a projection and certainly not advice. It knows nothing about your income, your state, your debts or your benefits status, and it ignores taxes and fees unless the page says otherwise. If you receive SSI or SSDI some of this maths works differently and getting it wrong can cost you eligibility — start with the Disability Wealth Guide instead. Our sourcing and correction policy is on the editorial standards page.
Nothing here is stored. Every calculation runs in your browser. No numbers are transmitted, logged or saved to any server, and no account is required. Close the tab and it is gone.