Budget Calculator
Split your monthly take-home pay into needs, wants, and savings using the 50/30/20 rule, then see what's left after your actual expenses.
Example
With $5,000 monthly after-tax income, the 50/30/20 targets are $2,500 needs, $1,500 wants, and $1,000 savings. If you spend $2,400 on needs, $1,300 on wants, and put $900 toward savings/debt (total $4,600), you have $400 remaining to allocate.
How it works
Enter your monthly after-tax income to get 50/30/20 targets for needs, wants, and savings. Optionally enter your current spending in each bucket to see how much income remains unallocated.
Good to know
This Budget Calculator applies the 50/30/20 rule to your monthly after-tax income, translating a single take-home figure into dollar targets: 50% for needs, 30% for wants, and 20% for savings or debt payoff. It then compares those targets against what you actually spend in each bucket and shows the cash you have left to allocate. It is built for people who want a fast, no-spreadsheet snapshot of whether their spending is roughly in balance, without signing up or sharing bank data.
Reach for it when you are setting up a budget from scratch, deciding how much rent you can afford, or sanity-checking a month after a raise or a move. Because everything recalculates as you type, it also works well as a "what if" tool: bump your income, trim your wants figure, and watch the remaining number and the progress bars respond instantly.
Read the results in two layers. The big "Remaining" number is your income minus everything you entered across the three buckets: positive means you have unallocated cash, zero means every dollar has a job, and negative means you are over your income. The bars compare each bucket against its own target, so a bar past 100% flags a category that is running hot even if your overall total still fits.
One caveat: the 50/30/20 split is a starting guideline, not a rule that fits everyone. High-cost-of-living areas often push needs well above 50%, while aggressive savers may intentionally exceed 20%. Treat the targets as reference points and adjust the proportions to your own situation rather than forcing your spending into the exact percentages.
Frequently asked questions
What counts as a need versus a want?
Needs are essentials you must pay: rent or mortgage, utilities, groceries, insurance, minimum debt payments, and transportation. Wants are lifestyle choices like dining out, streaming, hobbies, and vacations. Savings (the 20%) covers emergency funds, retirement contributions, and extra debt payoff beyond the minimums.
Why is my remaining amount negative?
A negative remaining value means your entered spending across needs, wants, and savings exceeds your after-tax income, so you're overspending. Reduce spending in the bucket that most exceeds its target (watch for bars over 100%) to bring the total back within your income.
Is my data uploaded anywhere?
No — this calculator runs entirely in your browser; nothing is uploaded.
Is this financial advice?
No. These are educational estimates — consult a qualified financial professional before making decisions.
People also ask
What is the 50/30/20 budget rule?
It is a guideline that allocates 50% of your after-tax income to needs, 30% to wants, and 20% to savings and debt payoff. It is meant as a simple framework rather than a strict requirement.
Should I use gross or net income for the 50/30/20 rule?
The rule is based on net, after-tax income, which is your actual take-home pay. Using gross income would overstate your targets because taxes and payroll deductions are not money you can budget.
Do minimum debt payments count as needs or savings?
Minimum required debt payments are generally treated as needs because they are obligations you must pay. Extra payments beyond the minimum to pay debt off faster typically fall under the 20% savings and debt-payoff bucket.
What if my needs are more than 50% of my income?
This is common in high-cost areas, and it usually means less room remains for wants or savings. Many people adjust the percentages, such as a 60/20/20 or 70/20/10 split, to fit their real costs.
How much should I have in an emergency fund?
A frequently cited benchmark is three to six months of essential expenses, though the right amount varies with job stability and household needs. Contributions toward this fund are part of the savings portion of a budget.
Does this calculator account for irregular or variable income?
It works from a single monthly after-tax figure, so for variable income you would enter an estimate, such as a conservative average of recent months. Re-running it with different income figures can show a best-case and worst-case picture.
What does it mean if my remaining amount is positive?
A positive remaining figure means your entered spending across needs, wants, and savings is less than your after-tax income, leaving cash unallocated. That surplus can be directed toward savings, debt, or another category.
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