Monthly Budget Planner

This is a back-to-basics cash-flow tool. It subtracts what you spend from what you earn to reveal your monthly surplus — the money available to save, invest, or throw at debt. It suits anyone who has never written down their numbers, households recalibrating after a change in income, and people who have found extra cash in their budget and want to deploy it deliberately rather than let it drift away.

It is deliberately simple. If you already track spending in a banking app and want forecasting or bank-sync features, this tool is not trying to replace that — it is a quick, honest snapshot you can build in two minutes.

• Your net (take-home) pay, not gross salary — the amount that actually lands in your account after tax, NI, pension, and student loan deductions. Use our UK Salary Calculator if you're unsure.
• Any other regular income — benefits, side income, child benefit, rental income.
• A rough breakdown of monthly spending. The fastest way is to open your last two months of bank statements and group transactions into categories.
• Annual costs that don't appear every month (car insurance, Christmas, holidays) — divide each by 12 and add as a line so they don't ambush you later.

• Income rows — each source of money coming in this month, named and amounted in £. Add as many as you need (salary, freelance, benefits).
• Expense rows — each category of spending this month. Group similar items (e.g. one "Groceries" line rather than every receipt) so the chart stays readable.
• Add / Delete buttons — create new rows or remove ones you don't need. The totals and chart update instantly.
• Summary panel — totals your income and expenses and shows the Remaining balance, colour-coded green (surplus) or red (deficit).
• Pie chart — shows each expense as a share of total spending, so you can see at a glance which category dominates.

The single most important number is Remaining. A positive figure is your monthly savings capacity — the engine behind every other financial goal on this site. A negative figure means you are spending more than you earn and accumulating debt, and the priority is to close that gap before anything else.

The pie chart tells you where the money goes. A common benchmark is the 50/30/20 rule: roughly 50% of net income on needs (housing, bills, groceries, transport), 30% on wants (dining out, subscriptions, hobbies), and 20% on savings or debt repayment. If your "needs" slice swallows 70% of income, housing or transport is likely the pressure point. If a single category dominates the chart, that's the first place to look for savings.

A two-person household with combined net pay of £3,200 a month:

• Income: £3,200 (Combined net salaries)
• Housing (Rent/Mortgage): £1,100
• Utilities & Council Tax: £350
• Groceries: £450
• Transport (Fuel/Fares): £250
• Subscriptions & Entertainment: £150

Total expenses equal £2,300, leaving a Remaining balance of £900. Housing consumes roughly 34% of net income — within healthy guidelines — and the surplus gives this household real options: an emergency fund, overpaying the mortgage, or boosting pension contributions.

• Forgetting annual costs. Car MOTs, Christmas, and annual subscriptions quietly break budgets. Divide each by 12 and add it as a monthly "sinking fund" line.
• Guessing instead of checking. People routinely underestimate grocery spend by 30–40%. Base your figures on the last two months of actual statements, not optimistic guesses.
• Leaving the surplus unassigned. A £900 surplus that sits in a current account gets spent. Give every pound a job the moment it arrives — move it to savings or a debt overpayment the same day.
• Using gross pay. Budgeting against pre-tax salary hides the real constraint and leads to overspending.

• If you have a surplus, point it at your highest-priority goal first — usually a starter emergency fund of £1,000, then high-interest debt, then 3–6 months of essential spending.
• If you have a deficit, the pie chart shows which category to attack. Housing and transport are the biggest levers; subscriptions and dining out are the quickest wins.
• Revisit this planner whenever your income changes — a new job, a pay rise, or a new recurring bill all shift the picture.
• For irregular income (freelance, zero-hours), build the budget around a conservative monthly average, not a bumper month.

• UK Salary Calculator: Determine your exact net income to input into this budget.
• Debt Snowball Calculator: Use your "Remaining" balance to aggressively pay down debts.
• Savings Goal Calculator: Allocate your surplus cash to hit specific financial targets.
• Savings Goals Guide: Strategies for turning a monthly surplus into real progress.

SmartMoneyTools checks statutory rates and thresholds against official government publications. Results are estimates for educational purposes and may not reflect every individual circumstance. Last reviewed: 11 September 2026.

Budgeting principles and average household spending data are informed by:

• Office for National Statistics — Family spending in the UK
• MoneyHelper — Budgeting guidance
• Citizens Advice — Managing living costs