5.5 Budgets – Meaning, Purpose and Types
5.5.1 Meaning and Purpose of Budgets
A **budget** is a detailed financial plan that estimates the expected income, expenditure and cash‑flows for a defined period (normally one year). In the Cambridge syllabus a budget is described as a tool that helps an organisation to plan, coordinate, control and measure performance.
- Planning – sets quantitative targets for revenue, costs and profit.
- Coordination – links the objectives of different departments, projects or activities.
- Control – provides a benchmark against which actual results are compared.
- Performance measurement – the difference between actual and budgeted figures is a budget variance, which is used to assess efficiency, effectiveness and to motivate staff.
Budgets as Performance‑Measurement Tools
When the period ends, the organisation calculates:
Variance = Actual – Budgeted
- For costs a **favourable** variance occurs when the actual cost is lower than budgeted; an **adverse** (unfavourable) variance occurs when the actual cost is higher.
- For revenues a **favourable** variance occurs when the actual revenue exceeds the budget; an **adverse** variance occurs when it falls short.
- Variance analysis enables managers to identify the cause (price, volume, efficiency or external factor) and to take corrective action.
5.5.2 Overall Benefits and Drawbacks of Budgets
| Benefits |
Drawbacks |
- Provides a clear financial target for the whole organisation.
- Facilitates resource allocation and prioritisation.
- Improves coordination between departments.
- Enables performance monitoring through variance analysis.
- Motivates staff by linking rewards to achievement of targets.
|
- Time‑consuming to prepare, especially for large firms.
- Can become a rigid “rule‑book” if not regularly reviewed.
- Risk of “budgetary slack” – managers may under‑estimate activity to make targets easier.
- May focus attention on short‑term financial targets at the expense of long‑term strategy.
|
5.5.3 Types of Budgets
Three approaches are highlighted in the Cambridge syllabus:
- Incremental budgeting
- Flexible budgeting
- Zero‑budgeting (including the related Zero‑Based Budgeting method)
1. Incremental Budgeting
Preparation starts from the previous year’s actual results; each line item is then increased or decreased by a set percentage or amount to reflect expected changes (inflation, growth, new projects, etc.).
| Aspect |
Details |
| Typical adjustment |
+/- % for inflation, sales growth, new product launch, etc. |
| Advantages |
- Simple and quick to prepare.
- Provides stability – departments know what to expect.
- Useful where the external environment is relatively stable.
|
| Disadvantages |
- May lock in past inefficiencies.
- Little incentive for managers to seek cost reductions.
- Not responsive to major market or technological changes.
|
| Numerical example |
Last year sales = £500 k. Management adds 5 % for expected growth → budgeted sales = £525 k. |
2. Flexible Budgeting
A flexible budget adjusts the original (static) budget to the actual level of activity, usually expressed as a function of a cost driver such as output volume.
Total Cost = F + c × Q
- F = fixed cost (does not change with activity)
- c = variable cost per unit
- Q = actual activity level (e.g., units produced)
| Aspect |
Details |
| Preparation |
Develop a budget for a range of activity levels (e.g., 0, 5 000, 10 000 units). |
| Use |
After the period, adjust the budget to the actual output and compare actual costs with the flexible budget. |
| Advantages |
- Separates the effect of volume changes from efficiency issues.
- Provides a more meaningful basis for variance analysis.
- Ideal for businesses with fluctuating demand.
|
| Disadvantages |
- Requires identification of reliable cost drivers.
- More complex than a static (incremental) budget.
|
| Numerical example |
Fixed costs = £20 k, variable cost = £5 per unit, actual output = 8 000 units.
Flexible‑budget cost = £20 k + (£5 × 8 000) = £60 k. |
3. Zero‑Budgeting (and Zero‑Based Budgeting)
Zero‑budgeting starts each budgeting cycle from a **zero base** – no cost is carried forward automatically. Every expense must be justified for the upcoming period, regardless of past spending.
- Often used by start‑ups, new divisions, or organisations undergoing major restructuring.
- Ensures that each cost is linked to current strategic objectives.
Zero‑Based Budgeting (ZBB)
ZBB is the systematic methodology that implements the zero‑budgeting principle. It requires:
- Identification of all activities (decision packages).
- Estimation of the cost of each activity.
- Ranking of packages according to their contribution to organisational goals.
- Allocation of resources to the highest‑ranked packages.
| Aspect |
Zero‑Budgeting |
Zero‑Based Budgeting (ZBB) |
| Starting point |
All items begin at zero each period. |
All items begin at zero and are justified & ranked as decision packages. |
| Typical use |
New businesses, divisions, or after a major change. |
Large organisations seeking thorough cost‑review and strategic re‑allocation. |
| Complexity |
Low‑medium – justification required but no detailed ranking. |
High – extensive analysis, ranking and documentation. |
| Motivation for cost control |
Strong – every cost must be defended. |
Very strong – resources allocated only to justified, high‑value activities. |
5.5.4 Budget Variances – Calculation and Interpretation
| Variance type |
Formula |
Interpretation (costs) |
Interpretation (revenues) |
| Favourable |
Actual – Budget < 0 (costs) / Actual – Budget > 0 (revenues) |
Cost lower than expected – positive outcome. |
Revenue higher than expected – positive outcome. |
| Adverse |
Actual – Budget > 0 (costs) / Actual – Budget < 0 (revenues) |
Cost higher than expected – problem to investigate. |
Revenue lower than expected – problem to investigate. |
Illustrative calculations
- Budgeted sales = £100 k; Actual sales = £115 k.
Variance = £115 k – £100 k = +£15 k → **Favourable** revenue variance.
- Budgeted production cost = £60 k; Actual cost = £68 k.
Variance = £68 k – £60 k = +£8 k → **Adverse** cost variance.
After calculating variances, managers should ask:
- Is the variance due to volume, price, efficiency or an external factor?
- What corrective action is required (e.g., renegotiating supplier terms, revising sales strategy)?
- How can the budgeting process be improved for the next cycle?
5.5.5 Comparison of the Three Budgeting Approaches
| Aspect |
Incremental Budget |
Flexible Budget |
Zero‑Budgeting |
| Basis of preparation |
Previous year’s actuals + adjustments |
Original static budget adjusted for actual activity level |
All items start from zero; each cost must be justified |
| Complexity |
Low |
Medium – requires cost‑driver analysis |
Medium‑high – justification of every line item (higher for ZBB) |
| Responsiveness to change |
Low – changes only through predetermined adjustments |
High – reflects actual volume and can highlight efficiency issues |
High – aligns spending with current strategic priorities |
| Motivation for cost control |
Limited – budgets are largely carried forward |
Moderate – variance analysis points out inefficiencies |
Strong – every expense must be defended |
| Typical use |
Stable environments, routine operations |
Businesses with variable demand (manufacturing, retail, services) |
Start‑ups, new divisions, organisations undergoing major restructuring |
5.5.6 Practical Guidance for Choosing a Budgeting Approach
- Market volatility – highly variable demand favours flexible or zero‑budgeting.
- Strategic focus – if cost‑containment and alignment with new objectives are priorities, consider zero‑budgeting/ZBB.
- Resource availability – limited time or expertise may make incremental budgeting more realistic.
- Organisational culture – cultures that value autonomy and innovation respond well to flexible or zero‑budgeting; highly hierarchical cultures may prefer the predictability of incremental budgets.
- Performance measurement needs – where detailed variance analysis is required, a flexible budget provides the most useful benchmark.
5.5.7 Key Take‑aways
- Budgets are essential for planning, coordination, control and performance measurement.
- Incremental budgeting is quick and stable but can perpetuate past inefficiencies.
- Flexible budgeting links costs to activity levels, giving a realistic basis for variance analysis.
- Zero‑budgeting forces a fresh justification of all expenses, supporting strategic alignment but requires more effort.
- Understanding and interpreting variances is central to effective control and continuous improvement.