Budget Calculator
Create a monthly budget using the 50/30/20 rule.
Results update as you type.
This calculator is for illustrative purposes only. Actual rates, fees and terms vary by lender. Consult a qualified financial adviser before making borrowing decisions.
How it works
A budget is the foundational tool of personal finance — a plan that assigns your income to specific categories before the month begins, ensuring your spending aligns with your priorities. This budget calculator uses the 50/30/20 rule popularized by US Senator Elizabeth Warren in her book All Your Worth, which provides a simple framework for allocating after-tax income. Fifty percent is allocated to needs: housing, utilities, food, essential transportation, insurance, and minimum debt payments — the non-negotiable expenses. Thirty percent goes to wants: dining out, entertainment, subscriptions, travel, and hobbies. Twenty percent is reserved for savings and debt repayment beyond the minimums. This budget calculator reveals your current allocation and shows whether your surplus or deficit requires adjustment. A surplus signals room to increase savings or accelerate debt payoff. A deficit means spending must be reduced or income increased — and the category breakdown reveals where the most impactful cuts can be made. Budgeting is a skill that improves with practice; even imprecise budgets beat no budget at all. Tracking spending for just three months gives most people a clear picture of their patterns and a realistic baseline for reducing discretionary costs.
Surplus = income − total expenses; Savings rate = savings / income × 100
Total expenses are summed across all input categories. Surplus is income minus total expenses. Savings rate is savings divided by income, expressed as a percentage. The 50/30/20 targets are income × 0.50 for needs, income × 0.30 for wants, and income × 0.20 for savings/debt. The housing percentage divides housing cost by total income and reveals whether housing is consuming a disproportionate share of budget.
Source:50/30/20 budgeting guideline
We review all our tools from time to time to ensure accuracy.
Worked example
How to use this calculator
- 1
Enter your values
Enter monthly take-home income.
- 2
Adjust the options
Adjust housing (rent/mortgage), utilities & internet, groceries & dining, transportation, healthcare & insurance, entertainment & subscriptions, monthly savings and other expenses if they apply — sensible defaults are already set.
- 3
Read your result
Monthly surplus / deficit updates instantly as you type — no button to press.
Frequently asked questions
What is the 50/30/20 budgeting rule?
The 50/30/20 rule divides after-tax income into three buckets: 50% for needs (essential expenses you cannot avoid — housing, food, utilities, insurance, minimum debt payments), 30% for wants (discretionary spending that enhances life — dining out, entertainment, subscriptions, travel), and 20% for savings and extra debt repayment. It provides a simple starting framework rather than a detailed line-item budget. Many people find it easier to maintain than zero-based budgeting because it allows flexibility within each bucket without tracking every transaction.
What is the difference between needs and wants in a budget?
Needs are expenses that are necessary to live and meet your obligations: shelter, basic food, utilities, essential transportation, health insurance, and minimum debt payments you are legally required to make. Wants are expenses that improve your quality of life but could be reduced or eliminated without threatening your basic welfare: dining out versus cooking at home, a streaming service, new clothes beyond what you need, gym memberships, and vacations. The distinction is sometimes fuzzy — a car is a need in most US cities but a luxury vehicle is a want.
What is a healthy savings rate?
Financial advisors commonly recommend saving at least 20% of gross income, which aligns with the 20% portion of the 50/30/20 rule applied to take-home pay. If you contribute 10% to a 401k and save another 10% for other goals, you are in solid shape. The higher your savings rate, the faster you build wealth — at a 50% savings rate, you can retire in roughly 17 years from a standing start under typical market assumptions. Even a 10–15% rate puts you on track for a comfortable retirement if started early.
How do I stick to a budget?
The most effective budgeting strategy is the one you will actually maintain. Popular methods include the envelope system (physically or digitally allocating cash to categories), zero-based budgeting (assigning every dollar a purpose each month), and the 50/30/20 automatic approach (automating savings and bills, then spending freely within the remaining balance). Tracking apps like YNAB, Mint, or Personal Capital make it easier by linking to accounts and categorizing transactions automatically. The key behavioral insight is that awareness alone reduces spending — people who review spending weekly consistently spend less than those who do not.
How much should I budget for housing?
The 50/30/20 rule places housing within the 50% needs bucket, and a common sub-guideline is to keep housing costs under 30% of gross income. In high-cost cities like New York or San Francisco, this is often impossible, and some financial advisors accept 35–40% for renters in very expensive markets if other categories are tightly controlled. Homeownership adds property taxes, insurance, and maintenance (budget 1–2% of home value annually), so total housing costs can run well above the mortgage payment alone and must be factored into affordability calculations.