Last reviewed: 29 September 2026 · Reviewed by IFM's qualified accountant
The purpose is decisions, not prediction theatre. A budget should show what must be true, where cash becomes tight and which actions follow when results differ.
What should you know about begin with decisions and constraints?
List the decisions the budget must support: hiring, pricing, marketing, equipment, owner drawings, premises or funding. Record cash constraints, contractual commitments and minimum service capacity.
Set the period, usually 12 months by month, with a higher-level second year where useful. Align it with the company's reporting year while keeping tax-year obligations visible separately.
Assign one owner to the model and named owners to assumptions. Finance can coordinate, but sales volume belongs with sales and staffing belongs with operations.
What should you know about build revenue from drivers?
Do not start by adding a percentage to last year without explaining it. Build revenue from units, customers, prices, capacity, conversion, utilisation, renewal or another real driver.
For a service business, available people, chargeable days and realised rate may drive the total. For products, units, price, returns and channel mix may matter. For recurring contracts, opening customers, new wins, churn and expansion form a bridge.
Separate confirmed revenue, supportable base assumptions and stretch. State when sales convert to invoices and cash.
What should you know about model direct costs and gross margin?
Link materials, subcontractors, delivery labour, commissions and transaction fees to revenue drivers where appropriate. Fixed direct capacity should not be made variable merely to improve the percentage.
Calculate gross profit and margin by material product or service. Check whether the mix implied by the budget is operationally possible.
Review price increases and supplier changes explicitly. A revenue target without gross-margin assumptions can reward unprofitable growth.
What should you know about build payroll carefully?
Create a role-level schedule with start dates, salary, employer National Insurance, pension, bonus, recruitment and equipment. Allow for notice periods and ramp-up before new hires produce revenue.
Use current payroll rates for the period and label them by tax year. If the budget crosses 6 April, separate the assumptions rather than carrying one unlabelled rate.
Include owner-director remuneration according to the agreed legal and tax plan, not as an unexplained balancing figure.
What should you know about add overheads and one-offs?
Use contracts and renewal dates for rent, software, insurance, professional fees, finance and utilities. Review each cost rather than rolling everything forward.
Separate recurring operating costs, capital expenditure and exceptional projects. Capital spending uses cash but may be depreciated or relieved for tax over a different period.
Include a contingency tied to identified uncertainty, not a hidden plug that makes the total work.
What should you know about translate profit into cash?
Add customer payment lags, supplier terms, VAT, payroll taxes, Corporation Tax or Self Assessment, loan payments, dividends or drawings and capital expenditure. The resulting cash budget should reconcile to the profit plan through working capital and non-cash items.
Show opening cash, facilities and minimum headroom. Identify the lowest point and funding need.
GOV.UK describes financial forecasts as part of a business plan used to secure finance. A lender will expect timing, assumptions and repayment capacity, not only an annual profit total.
What should you know about balance sheet consequences?
Forecast receivables, payables, stock, loans, taxes and retained profit. A plan with rapid sales growth may require more working capital and can breach a facility despite reporting profit.
Check that assets equal liabilities plus equity. An unbalanced forecast often reveals a missing cash movement or financing assumption.
For a company, adequate accounting records of money, assets and liabilities remain a legal duty; the budget sits alongside rather than replacing them.
What should you know about base, downside and upside?
Create three scenarios by changing named drivers. A downside might delay a product launch, reduce conversion, increase supplier prices or slow collections. An upside should include the delivery cost and working capital needed to fulfil extra demand.
Do not create scenarios by applying an arbitrary percentage to every line. That obscures causes and actions.
Define trigger dates and responses. If orders are below a level by the end of a month, delay hiring or reduce discretionary spend under an agreed rule.
What should you know about freeze the approved budget?
Once approved, lock the original budget. Each month compare actual results with it and explain price, volume, mix and timing variances.
Maintain a separate rolling forecast that incorporates what is now known. The budget preserves accountability; the forecast preserves relevance.
Record changes in strategy through a reforecast or formally approved revised budget rather than silently overwriting history.
What should you know about make review useful?
Issue a concise monthly pack: profit and loss versus budget, cash forecast, balance sheet, KPIs, material variances and actions. Lead with the few matters requiring decisions.
Assign actions, owner and date. Begin the next meeting by reviewing them. If the same variance recurs without action, improve the process rather than the commentary.
Use materiality. A small rounding difference should not consume the meeting while a growing debtor or capacity gap is ignored.
What should you know about common budget failures?
Avoid annual totals divided evenly by 12 when the business is seasonal. Do not put hoped-for funding into cash before approval or ignore VAT because it is not revenue.
Do not budget owner withdrawals without testing distributable profits, personal tax and company cash. Do not assume every employee starts on the first day planned.
Finally, do not outsource all assumptions to the accountant. Management must own the commercial plan.
What should you know about a one-week build timetable?
Day one: objectives and drivers. Day two: revenue and direct costs. Day three: people and overheads. Day four: cash, balance sheet and scenarios. Day five: challenge, approve and assign monthly reporting.
See management information and consultancy for the relevant service page. Use the Deadline Finder for standard first accounts, first confirmation statement and Corporation Tax dates. For VAT, payroll, personal tax and other obligations, check the tax deadlines calendar and your official records.
What should you know about challenge questions?
Which revenue assumptions are supported by contracts, historic conversion or capacity? Which rely on a new product, person or channel that has not been tested?
Have all employer costs, taxes, VAT cash flows, debt payments and annual renewals been included? Does the hiring plan begin before the workspace, equipment and management capacity exist?
What would management stop, delay or fund if the downside case occurs?
What should you know about version and access control?
Keep a locked approved budget, a live forecast and a record of changes. Limit formula editing and make assumptions visible in one place.
Reconcile the model to the accounting chart and opening balance sheet. This makes monthly actual-versus-budget reporting possible without manual reinterpretation.
What should you know about connect the budget to objectives?
Every significant cost should support a named operating objective or obligation. Every revenue target should have an owner and leading indicator.
Use the budget in purchasing and hiring approvals during the year. If it appears only in the annual meeting, it is not controlling decisions.
What should you know about review the process?
After the first quarter, assess forecast accuracy, data effort and meeting quality. Correct driver logic and responsibilities, not the original approved figures.
At year end, record what the budget got wrong and why. Feed those lessons into the next cycle so planning improves rather than restarting from the same assumptions.
Archive the approved model, assumptions and meeting record together. Future users should be able to understand the plan without relying on the preparer's memory.
What should you read next?
Management accounts, small-business KPIs and management information services.
What do people also ask about this topic?
What should you know about begin with decisions and constraints?
List the decisions the budget must support: hiring, pricing, marketing, equipment, owner drawings, premises or funding. Record cash constraints, contractual commitments and minimum service capacity.
What should you know about build revenue from drivers?
Do not start by adding a percentage to last year without explaining it. Build revenue from units, customers, prices, capacity, conversion, utilisation, renewal or another real driver.
What should you know about model direct costs and gross margin?
Link materials, subcontractors, delivery labour, commissions and transaction fees to revenue drivers where appropriate. Fixed direct capacity should not be made variable merely to improve the percentage.
What should you know about build payroll carefully?
Create a role-level schedule with start dates, salary, employer National Insurance, pension, bonus, recruitment and equipment. Allow for notice periods and ramp-up before new hires produce revenue.
Which official sources support this guide?
- https://www.gov.uk/write-business-plan
- https://www.gov.uk/government/publications/college-management-accounts-good-practice-guide/management-accounts-good-practice-guide-for-colleges
- https://www.gov.uk/government/publications/academy-trust-management-accounting/academy-trust-management-accounting-good-practice-guide
General guidance, not advice for your situation.
