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50/30/20 rule check built in
Needs, wants & savings categorised
Surplus or deficit instantly visible
Annual projection included
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Home›Calculators›Personal Finance›Monthly Budget Calculator

Monthly Budget Calculator
Spending Plan & 50/30/20 Rule Check

Enter your monthly income and expenses to see your surplus or deficit, check the 50/30/20 rule, and get a full spending breakdown with annual projection.

Country
Currency
📈
Your Monthly Budget
Monthly Income
€
Your take-home pay after tax each month.
€
Freelance, rental, benefits, or any other income.
Monthly Expenses

Enter your monthly amounts below. Leave unused rows at zero. The tag shows the default 50/30/20 category — click it to reassign.

Category Monthly Amount Type
📈
—
—
—
monthly surplus
50/30/20 Rule Check
🔴 Needs — target ≤50% —
— 50% target —
🟡 Wants — target ≤30% —
— 30% target —
🟢 Savings — target ≥20% —
— 20% target —
Total Income
—
monthly net
Total Expenses
—
all categories
Monthly Surplus
—
income minus expenses
Annual Surplus
—
surplus × 12
Total Income
—
/month
Total Expenses
—
/month
Surplus / Deficit
—
/month
Needs Total
—
% of income
Wants Total
—
% of income
Savings Total
—
% of income
Savings Rate
—
savings / income
Expense Rate
—
expenses / income
Annual Income
—
×12
Annual Expenses
—
×12
Expense Breakdown by Category
Spending Breakdown
Actual vs 50/30/20 Target
Actual
Target
Surplus at Different Income Levels
Monthly IncomeTotal ExpensesSurplus / DeficitSavings Rate50/30/20 Status
Annual Projection
CategoryMonthlyAnnual (×12)% of Income
Note: This calculator uses the amounts you enter to estimate your monthly budget position. The 50/30/20 rule is a planning guideline, not a universal standard. It may not apply to all income levels, life situations, or cost-of-living contexts. Results are estimates only.
✦ Cal, AI Explanation
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Your budget is ready. Ask me about the 50/30/20 rule, how to increase your savings rate, or which category is taking the most of your income.

📈 Key Notes

50/30/20 is a guideline, not a rule for everyone
Needs: housing, utilities, transport, debt payments, insurance
Wants: entertainment, dining out, clothing, subscriptions
Savings: pension, emergency fund, investments
Surplus after expenses can be reallocated to savings
Estimate only

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Related Guides

50/30/20 Rule Explained→ How to Build a Monthly Budget→ How to Increase Your Savings Rate→

What is the 50/30/20 rule?

The 50/30/20 rule is a budgeting guideline that divides after-tax income into three categories. Fifty percent is allocated to needs, which are essential expenses required for living and working. Thirty percent is allocated to wants, which are discretionary spending choices. Twenty percent is directed to savings and debt repayment beyond minimums. The rule was popularised by Elizabeth Warren and Amelia Warren Tyagi as a simple framework for sustainable personal finance.

CategoryTarget %Examples
Needs≤50%Rent, mortgage, groceries, utilities, transport, insurance, minimum debt payments
Wants≤30%Dining out, entertainment, subscriptions, clothing beyond basics, holidays
Savings≥20%Emergency fund, pension, investments, extra debt repayment

Needs vs wants vs savings

The distinction between needs and wants is sometimes subjective. A need is something required for basic living, working, or financial stability. A want is a discretionary choice that improves lifestyle but is not strictly necessary. Savings includes any money not spent today that builds future financial security, including contributions to pensions, emergency funds, or investments, as well as accelerated debt repayment beyond the minimum required.

Why your savings rate matters

The savings rate is the percentage of income saved each month. A higher savings rate accelerates wealth accumulation and financial resilience. At a 10% savings rate a person accumulates roughly one year of income every decade. At a 20% savings rate the same person accumulates one year of income every five years. Small increases in savings rate compound significantly over time because of investment growth on top of the contributions.

Frequently Asked Questions

What is the 50/30/20 rule?+
The 50/30/20 rule suggests allocating 50% of after-tax income to needs (essential expenses), 30% to wants (discretionary spending), and 20% to savings and debt repayment. It is a simplified framework for sustainable budgeting, not a strict requirement. Many people in high cost-of-living areas find needs consume more than 50%, which means the savings and wants targets must be adjusted accordingly.
What counts as a need vs a want?+
Needs are expenses required to maintain basic living and working conditions, such as rent, mortgage, utilities, groceries, essential transport, minimum debt payments, and insurance. Wants are choices that improve lifestyle but are not strictly required, such as dining out, streaming subscriptions, gym memberships, and non-essential clothing. The boundary between needs and wants is personal and depends on individual circumstances.
What if my needs take more than 50% of my income?+
In many cities and at lower income levels, essential costs exceed 50% of income. In this case the 50/30/20 rule is not achievable as written. The practical response is to maximise savings with whatever remains after needs, minimise wants spending, and look for ways to reduce the cost of needs over time through decisions such as housing, transport, or debt refinancing.
Does the surplus go to savings automatically?+
No. The surplus shown in this calculator is the difference between income and entered expenses. It represents money that has not been allocated to any category. To benefit from a surplus you need to consciously direct it to savings, investment, or debt repayment. Unallocated surplus is often absorbed by untracked small expenses unless it is actively redirected.
Should debt repayment go in needs or savings?+
Minimum required debt payments are generally classified as needs because they are obligatory. Extra debt repayment beyond the minimum is often classified as savings, since it reduces future financial obligations and builds net worth. This calculator lets you reassign any category to the type that best reflects your own situation.