Budget Calculator: See Where Your Money Actually Goes
Enter your income and monthly spending to see how your budget compares to the 50/30/20 guideline — and where your money is actually going. Hint: what you spent last month is a good place to start.
This calculator uses the 50/30/20 framework: 50% of after-tax income to needs, 30% to wants, 20% to savings and debt. It’s a guideline, not a rule — plenty of good budgets don’t match it exactly.
50/30/20 is the standard starting point, but it doesn’t fit every situation — if you live somewhere expensive, your needs may take up well over half your income no matter how carefully you plan. You can shift the targets to something more realistic for you and still keep the underlying idea: cap your needs, leave room for wants, and always put something toward savings and debt.
Here’s how your budget breaks down.
How to use this calculator
Start with your monthly after-tax income — what actually reaches your account, not your gross salary. If your income varies month to month, use a typical or slightly conservative figure.
Then fill in what you currently spend in each category. Use your real numbers rather than what you’d like them to be; the point of this exercise is an accurate picture, and you can decide what to change afterward. Anything you don’t spend on, leave blank. If something you pay for isn’t listed, add it as a custom category and choose which bucket it belongs to.
Two things worth getting right. Under required debt payments, enter what you have to pay each month — card minimums, loan or financing payments, or your monthly deposit if you’re enrolled in a debt resolution program. Anything you pay beyond what’s required goes under extra debt payments instead, because that portion is reducing your balance rather than covering the month’s cost. And if your insurance comes out of your paycheck before you’re paid, don’t enter it, since it’s already excluded from your after-tax income.
How to read your results
You’ll see three cards — needs, wants, and savings & debt — each showing what you actually spend, what percentage of your income that is, and how it compares to the 50/30/20 target.
Being over on one bucket isn’t a failure; it’s the information you came for. Most people find their needs bucket runs above 50%, which usually reflects housing costs more than choices. If you have income left unassigned, the tool will show that too — that’s the easiest money to redirect toward savings or debt.
What the results can’t tell you is what should change. That depends on your circumstances, which parts of your spending are genuinely fixed, and what you’re working toward.
How this calculator works
The framework. This calculator applies the 50/30/20 rule: 50% of after-tax income toward needs, 30% toward wants, and 20% toward savings and debt repayment. It’s a widely used guideline because it’s simple enough to maintain.
How categories are sorted. Each preset category is assigned to a bucket based on standard treatment of that expense: housing, utilities, groceries, transportation, insurance, and required debt payments are needs; dining out, subscriptions, and discretionary shopping are wants; savings, investing, and any debt payment above what’s required fall in the third bucket. Custom categories are assigned by you.
How debt payments are sorted. Debt appears in two buckets here, and the dividing line is whether the payment is required. Required payments — card minimums, loan and financing payments, and program deposits if you’re enrolled in a debt resolution program — behave like any other fixed monthly bill, so they sit with needs. Payments above what’s required are different: that money is shrinking the balance faster than you’re obligated to, which is why it sits alongside savings. This distinction matters, because it means paying extra on debt counts toward your 20% rather than inflating your needs.
What it doesn’t do. The calculator doesn’t project your budget into future months and doesn’t account for irregular annual expenses like car registration or holiday spending — those are a common reason budgets break, and worth planning for separately.
Percentages. Bucket percentages are calculated against your after-tax income and won’t necessarily total 100%. If they total less, you have income left to assign; if more, your spending currently exceeds your income. Both are shown rather than smoothed over.
Frequently asked questions
A need. Auto insurance is required to drive legally in nearly all cases, and it’s a fixed cost of transportation. In this calculator it’s grouped under transportation along with your car payment, gas, and transit costs.
Yes, and that’s the standard treatment. Groceries you prepare at home are a need; restaurant meals, delivery, and takeout are discretionary, so they belong in wants. If you find that line blurry, a reasonable approach is to count basic groceries as a need and anything you’d describe as a treat as a want.
Generally a want, and it’s grouped with subscriptions and memberships here. That isn’t a judgment about its value — exercise matters — but the 50/30/20 framework defines needs as expenses you genuinely can’t go without, and most gym memberships don’t meet that test. If a specific membership is medically necessary for you, move it to needs as a custom category.
Required payments go in needs; anything above them goes in savings and debt. A required payment is whatever you have to pay that month under the arrangement you’re in — a credit card minimum, an auto or personal loan payment, a financing plan, or a monthly deposit into a debt resolution program. These function like your other fixed bills, so they’re grouped with needs. Money you pay beyond that is doing something different: it’s reducing what you owe faster than required, so it belongs in the savings and debt bucket.
Enter your monthly program deposit under required debt payments. Don’t enter creditor minimums you aren’t currently paying; the calculator is meant to reflect money that actually leaves your account. If you’re also paying separately on debts outside the program — a car loan, for instance — include those as required payments too.
That’s very common, particularly if you live somewhere with high housing costs. It doesn’t mean the framework is useless — it’s telling you how much of your income is committed before you make any discretionary choices, which is genuinely useful to know. Many people adjust the ratios to fit their situation while keeping the underlying discipline of capping needs, allowing some wants, and always putting something toward savings or debt.
Yes. Use the “Adjust targets” option to switch to a split like 60/20/20 or 70/20/10, or to set your own. Your three targets need to total 100%. 50/30/20 is the standard published guideline and a sensible starting point, but adjusting it is often the practical choice when housing or other fixed costs take up more than half your income — what matters is keeping the underlying discipline of capping needs, leaving some room for wants, and putting something toward savings and debt.
No. If your premiums are deducted before you’re paid, they’re already excluded from your after-tax income, so entering them would double-count. Only include insurance you pay separately.
No. If you want to keep your figures, note them down before you leave the page.
Where to go from here
Your results are a snapshot — what you do with them is the useful part:
- If your needs came in over target, 50/30/20 Budgeting Explained covers how to work with the framework when your fixed costs are high.
- If you’ve built budgets before and struggled to keep them, Why Budgets Fail (and How to Fix It) walks through the most common reasons and their fixes.
- To build a full plan from scratch, start with How to Make a Budget That Actually Works.
- If you’d rather manage money by structure than by tracking, see Building a Money System.
