A zero-based budget means your take-home pay minus every planned use of it equals zero: each pound is given a job before the month starts, whether that is rent, food, savings or fun. It does not mean spending everything. Savings, sinking funds and a small buffer are jobs too. The easiest way to understand it is to see one built, so this guide works through a full month on £2,273 of take-home pay.
For the theory, the comparison with 50/30/20 and the pros and cons, read our main zero-based budgeting UK guide. This page is the worked example you can copy.
Step 1: start from take-home pay, not salary
Zero-based budgets only balance if you start with the money that actually reaches your account. Our example is a single person earning £33,000 a year in England, Wales or Northern Ireland in the 2026/27 tax year, with no pension contributions or student loan.
- Income Tax: 20% of the £20,430 above the £12,570 Personal Allowance, which is £4,086.
- National Insurance: 8% of the same £20,430, which is £1,634.40.
- Take-home: £27,279.60 a year, or about £2,273 a month.
Your own figure will differ if you pay into a workplace pension, repay a student loan, live in Scotland or have a different tax code. Use your payslip or the take-home pay calculator. If your income changes month to month, budget using your lowest typical month and treat anything above it as a bonus to assign when it arrives.
Step 2: list every outgoing, including the irregular ones
Go through the last three months of bank statements and write down every regular payment. Then add the costs that do not come every month: car insurance and servicing, an annual subscription, Christmas, birthdays, glasses, school trips. Divide each annual cost by 12. These become sinking funds, which is what stops a zero-based budget collapsing the first time a big bill arrives. If you pay council tax over 10 months, remember you can ask your council to spread it over 12, which smooths your budget.
Step 3: the worked example
Here is the full month for £2,273 of take-home pay. Every pound has a job, and the total is exactly the income.
| Job | Monthly | Notes |
|---|---|---|
| Rent and council tax | £1,000 | Rent £850, council tax £150 |
| Energy, water, phone, broadband | £205 | Energy £110, water £40, phone and broadband £55 |
| Contents insurance | £20 | Paid monthly |
| Groceries and toiletries | £300 | Weekly shop plus top-ups |
| Transport | £120 | Bus pass and occasional train |
| Subscriptions | £25 | Streaming and phone storage |
| Sinking funds | £110 | Annual costs £60, gifts and Christmas £50 |
| Emergency fund | £150 | Until it reaches three months of essentials |
| Holiday goal | £75 | £900 a year |
| Personal and eating out | £210 | Guilt-free spending |
| Buffer | £58 | Absorbs small overspends |
| Total | £2,273 | Income minus jobs = £0 |
The figures are illustrative, not typical costs for your area. Swap in your own; the only rule is that the total must match your income. The budget planner does the adding up for you.
Step 4: set it running on payday
A zero-based budget is a plan; automation makes it happen. On the day after payday:
- Check all bills are on Direct Debit and collected soon after payday.
- Set standing orders for the emergency fund, sinking funds and holiday goal into separate pots or accounts. See our payday automation checklist.
- Leave groceries, transport, personal spending and the buffer in your current account, or move personal spending to a separate card so you can see what is left at a glance.
- Keep savings in an easy-access account that pays interest; our savings accounts guide explains how to compare.
Step 5: adjust during the month without breaking it
Things will not go exactly to plan, and they do not need to. The rule is simple: if you overspend in one category, move money from another so the total still balances. For example, if a friend's birthday dinner costs £40 more than planned, take it from the buffer, or reduce personal spending for the rest of the month. What you should avoid is quietly pulling from the emergency fund for non-emergencies. A quick check once a week, comparing actual spending with each job, keeps you on track. A free budgeting app or a simple spreadsheet both work; see budget spreadsheet vs app.
What to do with money left at the end of the month
If the buffer or a spending category has money left on the last day, give it a job straight away rather than letting it roll into next month unnoticed. Good options, in order: top up the emergency fund until it hits its target, put it towards a debt with a high interest rate, or add it to a goal. Some people also carry a small amount forward in the groceries line to cover a five-week month. Either way, write the new job down so the plan still adds up to zero.
Adapting the example to your situation
The example is one person on a steady salary. Common variations:
- Weekly or four-weekly pay: build a budget for each pay period instead of each calendar month. With four-weekly pay you get 13 pay days a year, so one month will have two; assign that extra pay deliberately.
- Couples: decide which jobs are joint (rent, bills, food) and which are individual, then build one joint zero-based budget and two personal ones.
- Universal Credit: budget around your monthly payment date and amount, which can change if your earnings change. Our Universal Credit budgeting guide covers this in detail.
- Debt repayments: list them as jobs before savings goals, and use the debt payoff calculator to see how extra payments shorten the term.
Frequently asked questions
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