Household Budget Planner

Enter your monthly income and expenses. See a 50/30/20 analysis and find out if you have a surplus or deficit.

A household budget is the single most effective tool for taking control of your money. The Money and Pensions Service found that 11.5 million UK adults have less than £100 in savings, and the leading cause is not low income but a lack of budgeting. Knowing where your money goes each month is the first step to changing where it goes.

This planner uses the 50/30/20 framework: 50% of income on needs (housing, bills, food), 30% on wants (entertainment, dining out, hobbies), and 20% on savings or debt repayment. It gives you a clear picture of whether your spending is balanced or needs adjusting.

Enter your monthly take-home pay and fill in your expenses by category. The tool calculates your surplus or deficit and shows you how your spending compares to the 50/30/20 benchmark. Use it monthly to track progress and build better financial habits.

How it works

  1. Enter your monthly net income (take-home pay after tax).
  2. Fill in each expense category with your typical monthly spending.
  3. View your surplus or deficit and a 50/30/20 comparison chart.

Written by the CalcStack team · Last updated April 2026

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Needs (essentials)

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Savings & debt

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Wants (lifestyle)

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Frequently asked questions

What is the 50/30/20 rule?▾
The 50/30/20 rule suggests spending 50% of after-tax income on needs (housing, bills, food), 30% on wants (entertainment, dining, subscriptions), and 20% on savings and debt repayment. It is a guideline, not a strict rule.
Is the 50/30/20 rule realistic in the UK?▾
In high-cost areas like London, needs may take 60-70% of income. Adjust the ratios to your situation. Even 50/30/20 is aspirational for many — the key is having a plan and tracking spending.
What counts as a need vs a want?▾
Needs are essentials: housing, utilities, food, transport to work, insurance, minimum debt payments. Wants are nice-to-haves: eating out, streaming services, new clothes, holidays. Some items blur the line — use your judgment.
How much should I save each month?▾
Aim for at least 20% of after-tax income if possible. Start with building a 3-6 month emergency fund, then focus on pension contributions and other goals. Any amount saved consistently is better than nothing.
Should I budget weekly or monthly?▾
Monthly budgeting works best for most people since bills are monthly. If you are paid weekly, multiply by 4.33 to get a monthly figure. Some people find weekly cash budgets for variable spending (food, entertainment) helpful.
What if my expenses exceed my income?▾
Look for expenses to cut, starting with wants. Can you reduce subscriptions, switch energy providers, or find cheaper insurance? If essential costs exceed income, seek free advice from Citizens Advice or StepChange.
Should I include annual costs?▾
Yes — divide annual costs (car insurance, MOT, Christmas, holidays) by 12 and include the monthly figure. This avoids surprise large expenses and smooths your budget over the year.
How do I stick to a budget?▾
Use separate accounts for bills and spending money. Set up standing orders on payday. Track spending with a budgeting app. Review monthly. The key is making it automatic so willpower is not required.
What about irregular income?▾
Budget based on your lowest expected monthly income. In good months, put the extra into savings. Build a larger emergency fund (6+ months) to cover shortfalls in lean months.
Should I budget before or after pension?▾
Budget using your take-home pay after pension, tax, and NI deductions. Your pension is already being saved automatically. The 20% savings target in 50/30/20 is in addition to workplace pension.

Related calculators

Take Home Pay CalculatorDebt Repayment CalculatorSavings Goal Calculator

© 2026 CalcStack — a Flavoureak UK Ltd product. This is a budgeting tool only and is not financial advice.