PureTools
Enter income and spending to see your budget health.
Budget Calculator
Build a monthly budget from your take-home pay, compare it with 50/30/20 or a custom rule, and see your savings rate, category gaps and next best move instantly.
Budget rule
Monthly income
Needs
Wants and savings
Effective savings rate
0%
Savings plus unassigned surplus.
Needs share
0%
Compared with selected rule.
Wants share
0%
Flexible monthly spending.
Total planned spending
$0
Needs, wants and assigned savings.
Rule comparison
50/30/20| Bucket | Target | Actual | Gap | Status |
|---|
Spending breakdown
Monthly| Category | Amount | Share |
|---|
Next best moves
How to use the Budget Calculator
This calculator turns a rough monthly budget into a decision dashboard. It shows whether your fixed needs, flexible wants and savings plan fit the selected rule, then gives you the exact dollar gap instead of a vague percentage. Use it before changing subscriptions, setting a savings goal, planning extra debt payoff in the Debt Payoff Calculator, or deciding how much can move toward long-term investing.
- Enter monthly take-home income - use the money available after taxes and payroll deductions, not gross salary.
- Add required needs - housing, utilities, groceries, transportation, insurance, healthcare and minimum debt payments.
- Add wants and assigned savings - include lifestyle spending plus emergency fund deposits, investments and extra debt payments.
- Pick a rule - start with 50/30/20, switch to 60/20/20 or 70/20/10 for high-cost months, or use custom percentages.
- Read the gaps - green means the bucket fits, while warning gaps show the exact amount to move, cut or increase.
- Export the plan - copy a summary, download a CSV, or save a formatted Excel workbook generated locally in your browser.
Power feature: rule-based gap analysis
Most budget calculators stop at income minus expenses. This one compares your real spending against a chosen rule and separates the result into needs pressure, wants flexibility and effective savings rate. The savings rate includes unassigned surplus because that money can be directed to emergency savings, retirement contributions or extra debt payoff. If your savings rate is strong but needs are too high, the tool surfaces that nuance instead of calling the whole budget bad.
Sources and practical limits
The 50/30/20 framework appears in financial education materials such as the Consumer Financial Protection Bureau activity on analyzing budgets with the 50-30-20 rule. For a simpler worksheet approach, the Federal Trade Commission's consumer education site offers a budget worksheet, and the CFPB recommends tracking current spending before building a plan in its spending tracker guidance. This calculator is informational and does not replace professional financial advice.
Frequently asked questions
What is the 50/30/20 budget rule?
The 50/30/20 rule is a simple monthly budgeting framework: up to 50% of take-home income goes to needs, up to 30% goes to wants, and at least 20% goes to savings, investing or extra debt payoff. It is a guideline, not a law. This calculator shows the target caps, compares them with your real spending, and lets you switch to 60/20/20, 70/20/10 or a custom rule when your cost of living needs a different split.
Should I use gross income or take-home income?
Use monthly take-home income: the money that actually lands in your checking account after taxes, payroll deductions and mandatory withholdings. A budget based on gross salary can look comfortable while still failing in real life because taxes and deductions are not spendable. If you receive variable income, use a conservative monthly average or enter your base income first, then add side income only when it is reliable enough to plan around.
How does the calculator treat savings and leftover cash?
The savings rate shown here counts money you explicitly assign to savings, investing or extra debt payments, plus any unassigned surplus left after expenses. That makes the result more practical than a simple savings input because leftover cash can still be directed to an emergency fund, retirement account or debt payoff plan. If your budget is short, the calculator reduces effective savings by the shortfall so the rate does not overstate what you can actually keep.
What counts as needs, wants, and savings?
Needs are required costs such as housing, utilities, groceries, transportation, insurance, healthcare and minimum debt payments. Wants are flexible lifestyle costs such as restaurants, entertainment, shopping, subscriptions and travel. Savings includes emergency fund deposits, retirement contributions, investments and extra debt payments above the minimum. The categories are not always perfect, so use the custom rule when your household, city or debt load makes the standard 50/30/20 split unrealistic.
What if my needs are above 50%?
High needs are common in expensive housing markets, during childcare years, while paying medical costs, or when minimum debt payments are heavy. The first step is not guilt - it is visibility. The calculator separates needs from wants so you can see whether the pressure comes from fixed bills or flexible spending. If needs stay high, a 60/20/20 or 70/20/10 rule may be more realistic while you work on income, refinancing, moving costs or debt reduction.
Can this replace a spreadsheet or budgeting app?
It can replace the first-pass planning spreadsheet: income in, spending categories out, savings rate calculated, and gaps shown immediately. It does not connect to bank accounts, categorize transactions automatically or track history across months. That is intentional for privacy. Use it to design a monthly plan, export the local CSV or Excel workbook, then decide whether you need a full budgeting app for ongoing transaction tracking.
Are my budget numbers saved after I close the tab?
No. Budget inputs are stored only in sessionStorage, which is cleared automatically when you close the tab or browser window. Nothing is uploaded to PureTools, no account is created, and the calculator has no backend database. The temporary tab storage exists only so a refresh does not erase the scenario you are currently editing. Once the tab is closed, your budget numbers are erased. Your data is never used to train AI models or improve machine learning systems.
Is this budget calculator financial advice?
No. This is an educational planning tool, not financial, tax, legal or credit counseling advice. It can help you understand category limits, savings rate and monthly cash flow, but it cannot evaluate your full financial situation, local costs, family needs or debt terms. For serious debt hardship, housing affordability problems or major investment decisions, compare the output with official consumer resources and speak with a qualified professional. For long-term savings planning, use the Retirement Calculator as a separate estimate.