Budget Calculator

Last Updated:

Plan your monthly budget with the 50/30/20 rule. See exactly where your money goes and how much you should be saving.

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🏠 NEEDS (50%)

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🎯 WANTS (30%)

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💰 SAVINGS (20%)

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Monthly Budget Summary

$0

Needs $0
Wants $0
Savings $0

📐 Formula

Needs ≤ 50% of take-home income. Wants ≤ 30%. Savings/debt ≥ 20%

How to Use the Budget Calculator

1

Enter your monthly take-home income

Input your net income after all taxes and deductions — the money that actually enters your account. Include all sources: salary, freelance, rental income.

2

Categorise your expenses

Allocate spending to needs (housing, utilities, groceries, transport, insurance), wants (dining, entertainment, subscriptions), and savings/debt repayment.

3

Check surplus or deficit

Review the difference between income and total expenses. A deficit requires immediate action. A consistent surplus is the foundation of wealth-building.

4

Apply the 50/30/20 benchmark

Compare your allocations: 50% to needs, 30% to wants, 20% to savings and debt. Adjust based on your goals and cost-of-living realities.

The 50/30/20 Rule Explained

The 50/30/20 framework divides after-tax income into three categories. 50% for needs: rent/mortgage, utilities, groceries, transport, insurance, minimum debt payments. 30% for wants: dining, streaming, gym memberships, holidays. 20% for savings and debt repayment: emergency fund, retirement accounts, extra debt payments. These are guidelines — high cost-of-living cities may require 60–65% for needs, and high earners may comfortably save 30–40%.

Building an Emergency Fund First

Before aggressively investing, build 3–6 months of essential expenses in a high-yield savings account (currently 4–5% APY). This prevents job loss, medical bills, or car repairs from creating a debt spiral. Until this foundation is in place, the 20% savings allocation should flow primarily into the emergency fund rather than investments. Once funded, redirect to retirement accounts, then additional investment accounts.

Common Budget Leaks: Where Money Disappears

Subscription creep is one of the most common causes of budget deficits. The average household pays for multiple streaming services, software subscriptions, and auto-renewed annual fees totalling $200–$400/month — much of it unused. Conduct a monthly audit: review every recurring charge and cancel anything unused in the past 30 days. Food spending is another major leak — the gap between weekly meal planning versus daily convenience or takeout spending often exceeds $400/month for a household. Small daily habits compound into annual thousands.

Sources & Methodology

Calculations are based on the most current publicly available data from authoritative government and industry sources:

Frequently Asked Questions

Allocate 50% of take-home pay to needs (housing, food, transport, utilities), 30% to wants (dining, entertainment, hobbies), and 20% to savings and debt repayment. It was popularised by Senator Elizabeth Warren in All Your Worth.
Needs are essentials you cannot live without: rent/mortgage, basic groceries, utilities, minimum debt payments, and essential transport. Wants are nice-to-haves: streaming services, gym memberships, restaurants, and non-essential shopping.
Start with whatever you can — even 5% is better than 0%. Automate savings so they happen before you spend. As income grows or debts are paid off, gradually increase your savings rate. The goal is progress, not perfection.
The traditional rule is 30% of gross income. In 2026, median US rent as a share of income is closer to 35–40% in major metros. Many financial advisors now suggest keeping total housing costs (rent + renters insurance + utilities) under 30% of take-home pay rather than gross income for a more realistic target.