A budget is simply a plan for your money — a way of deciding in advance where each pound goes rather than wondering where it went. Creating a budget doesn’t require a spreadsheet or financial expertise. What it does require is a clear picture of what comes in, what goes out, and what’s left over. This guide walks you through the process step by step.
Step 1: Calculate your monthly take-home pay
Start with your net income — the amount that actually lands in your bank account after tax, National Insurance, pension contributions, and any other deductions. If your income varies month to month (freelance, self-employed, or variable hours), use a conservative average based on your last three to six months.
Include all income sources: salary, side income, benefits, child benefit, rental income, or any other regular payments.
Step 2: List all your fixed expenses
Fixed expenses are costs that stay the same every month — the non-negotiables. These typically include rent or mortgage payments, council tax, energy bills (if on a fixed tariff), broadband, phone contract, insurance premiums, loan repayments, and subscriptions.
Go through your last three months of bank statements to make sure you’ve captured everything. It’s easy to forget small recurring charges that add up significantly over the year.
Step 3: Estimate your variable expenses
Variable expenses change month to month — groceries, transport, eating out, clothing, entertainment, personal care, and household items. Again, use your bank statements to calculate realistic averages rather than guessing. Most people underestimate their variable spending significantly.
Step 4: Calculate what’s left
Subtract your total monthly expenses from your total monthly income. The result is your surplus — the money available for saving, investing, or debt repayment. If the number is negative, you’re spending more than you earn, which needs addressing before anything else.
Step 5: Allocate your surplus intentionally
A surplus without a plan tends to disappear. Decide in advance where your remaining money goes each month — building your emergency fund, paying down debt, saving for a specific goal, or investing. Automating these transfers on payday removes the temptation to spend the money before it’s allocated.
The 50/30/20 rule as a starting framework
If you’re unsure how to split your income, the 50/30/20 rule provides a simple starting point: 50% on needs, 30% on wants, and 20% on savings and debt repayment. It’s a guideline, not a rule — adjust the percentages to suit your income level and goals.
Step 6: Review monthly
A budget only works if you check it regularly. Set aside 15 minutes at the end of each month to compare what you planned to spend with what you actually spent. If a category consistently goes over, either adjust your spending or adjust your budget — but don’t ignore the gap.
Frequently asked questions
How do I stick to a budget?
Automate as much as possible — savings, investments, and bill payments on payday so the money is allocated before you can spend it. Use a separate account for discretionary spending with a fixed weekly allowance. Review monthly and adjust rather than abandoning the budget when things go wrong.
What’s the best budgeting app in the UK?
Popular options include Monzo, Emma, and Snoop — all of which link to your bank accounts and automatically categorise spending. The best app is the one you’ll actually use consistently.
How much should I save each month?
A common starting target is 20% of take-home pay. If that’s not achievable immediately, start with whatever is realistic — even 5% is better than nothing — and increase it gradually as your income grows or expenses fall.
Should I budget weekly or monthly?
Monthly budgets align with most UK pay cycles and bills. However, a weekly spending allowance for variable costs like food and entertainment can help make the budget feel more tangible and easier to track day to day.