Cost Centres, Budgets and Basic Management Accounting

Introduction

Financial accounting reports the results of an entire business, but managers usually need more detailed information. They may want to know which department used resources, which branch generated income, whether a production line operated efficiently, and why actual expenditure differed from the plan. Cost-centre accounting, budgeting and variance analysis provide this internal management information.

This chapter introduces practical methods for allocating income and expenses to cost centres, preparing simple budgets, comparing actual results with planned results, and interpreting variances. The emphasis is on sound accounting judgement and the use of accounting software such as Tally to support, rather than replace, managerial analysis.

Learning Objectives

By the end of this chapter, a learner should be able to:

1. Explain the purpose of cost centres and distinguish them from cost categories.
2. Classify direct and indirect costs and allocate them fairly.
3. Create and use cost centres in a computerised accounting system.
4. Prepare a simple operating budget.
5. Compare budgeted and actual amounts.
6. Calculate and interpret favourable and adverse variances.
7. Recommend appropriate managerial action while recognising the limitations of simple variance analysis.

1. Management Accounting and Responsibility Information

Management accounting is the process of collecting, classifying, analysing and communicating information for internal planning, control and decision-making. Unlike published financial statements, management reports may be prepared monthly, weekly or even daily. They may also contain estimates, non-financial information and alternative classifications of cost.

A central principle is responsibility accounting. Under this approach, managers receive information about activities they can reasonably influence. A production supervisor may be responsible for labour hours and material usage, while a sales manager may be responsible for sales revenue and selling expenses. Assigning a cost to a manager who cannot influence it can produce unfair evaluations and poor decisions.

A cost object is anything for which cost is measured, such as a product, service, project, customer or department. A cost centre is a department, location, function or activity for which costs are accumulated and reported. Examples include Administration, Sales, Workshop, Warehouse and Delivery.

Cost centres can be:

• Production cost centres, where goods or services are produced.
• Service cost centres, which support other departments, such as maintenance or information technology.
• Revenue or profit centres, where income and related costs are monitored.
• Investment centres, where managers are also responsible for assets and investment returns.

A cost centre is an internal reporting unit; it is not necessarily a separate legal entity or bank account.

2. Cost Classification and Allocation

Direct and indirect costs

A cost is direct when it can be traced economically to a particular cost object. For example, timber used for a specific table is a direct material cost. A cost is indirect when tracing it to individual products or departments is impractical or uneconomic. Factory rent, electricity for common areas and the salary of a general supervisor are common indirect costs.

The same cost can be direct or indirect depending on the cost object. The salary of a branch manager is direct to the branch but indirect to each individual product sold by that branch.

Fixed and variable costs

A fixed cost remains constant in total within a relevant range and for a specified period, although fixed cost per unit changes with activity. Rent is often treated as fixed in the short term. A variable cost changes in total as activity changes, while variable cost per unit may remain approximately constant. Packaging materials may be variable with units sold.

Many costs are semi-variable or mixed. A telephone contract, for example, may include a fixed monthly charge plus usage charges. Correct classification improves the quality of a budget.

Allocation, apportionment and absorption

Three related terms should be distinguished:

• Allocation assigns an entire cost to one cost centre when a clear relationship exists.
• Apportionment distributes a common cost among two or more cost centres using a reasonable basis.
• Absorption transfers a cost-centre cost to products, services or jobs using an absorption rate.

Examples of allocation bases are shown below.

The selected basis should reflect the cause of the cost as far as practicable. Convenience alone is not sufficient where it creates materially distorted reports.

Allocation formula

When a common cost is apportioned according to a measurable basis, the amount assigned to a cost centre is:

The allocation base must be measured consistently. If rent of $24,000 is apportioned by floor area and the Sales Department occupies 300 square metres out of a total of 1,200 square metres, its share is:

$24,000 × (300 ÷ 1,200) = $6,000.

This calculation assumes that floor area is a reasonable proxy for the use or benefit of the premises. If one department uses specialised air-conditioning or high-security facilities, a single floor-area basis may be inappropriate.

3. Cost Centres in Tally and Other Accounting Systems

In a computerised accounting system, cost-centre information is usually recorded in addition to the normal ledger account. The ledger answers “what type of transaction occurred?” The cost centre answers “where or for whom did it occur?”

For example, an electricity payment may be posted to the Electricity Expense ledger and assigned to the Workshop cost centre. A later report can then show total electricity expense and the Workshop’s share.

Designing a cost-centre structure

A practical structure should be:

1. Relevant: it should support actual management decisions.
2. Understandable: staff should know which centre to select.
3. Stable: frequent unnecessary changes reduce comparability.
4. Economical: the benefit of detail should exceed the recording effort.
5. Compatible with responsibility: reports should support accountable managers.

An illustrative structure for a small trading and service business is:

Tally configurations vary by version and organisation, but the general procedure is to enable cost-centre accounting, create cost-centre categories or groups, create individual cost centres, and select the relevant centre during voucher entry. The user should then review cost-centre reports and reconcile them to the underlying ledger balances.

Practical controls

Cost-centre accounting is only as reliable as the data-entry controls surrounding it. Important controls include:

• documenting the purpose of every cost centre;
• restricting creation and alteration of centres to authorised users;
• requiring a cost-centre selection for relevant expense and income ledgers;
• using approval workflows for unusual allocations;
• reviewing unallocated or suspense transactions;
• reconciling the sum of cost-centre amounts to the general ledger;
• retaining evidence for allocation bases;
• closing or archiving obsolete centres rather than deleting historical data.

A transaction should not be allocated merely because a software field requires a selection. The selection must represent a defensible economic relationship.

4. Preparing Budgets

A budget is a quantified plan for a future period. It may cover sales, production, purchases, payroll, overhead, cash or capital expenditure. A budget is not a guarantee; it is a structured expression of expectations and intended action.

Purposes of budgeting

Budgets help an organisation to:

• translate objectives into measurable plans;
• coordinate purchasing, staffing and production;
• identify expected cash requirements;
• communicate responsibilities;
• establish benchmarks for control;
• identify resource shortages before they occur.

A budget should be based on assumptions that are stated, reviewed and updated when circumstances change.

Types of budget

A sales budget estimates units and selling value. A production or activity budget estimates the level of operations required. An expense budget estimates departmental costs. A cash budget forecasts cash receipts and payments. A capital budget covers long-term assets such as vehicles or equipment.

A static budget is prepared for one planned activity level. A flexible budget adjusts variable costs to the actual activity level while retaining appropriate fixed costs. Flexible budgets provide a fairer comparison when actual volume differs significantly from the planned volume.

Basic budget relationships

If units and price are known, budgeted sales value is:

If opening inventory, required closing inventory and expected sales are known:

For a simple cash budget:

These relationships assume that the relevant amounts are measured for the same period and that non-cash items, such as depreciation, are excluded from cash payments.

Worked example: a departmental expense budget

The Administration Department expects monthly costs as follows:

• Salaries: $8,000
• Rent allocation: $2,000
• Telephone: fixed charge of $300 plus $0.05 per customer order
• Office supplies: $1.20 per order
• Depreciation: $500

The budget is prepared for 2,000 customer orders.

Telephone cost = $300 + ($0.05 × 2,000) = $400.

Office supplies = $1.20 × 2,000 = $2,400.

Total budgeted departmental cost is:

$8,000 + $2,000 + $400 + $2,400 + $500 = $13,300.

Cash operating cost is $12,800 because depreciation of $500 is non-cash. The distinction matters when the same budget is used for both profit planning and cash planning.

5. Comparing Actual and Budgeted Results

A budget-control report normally presents budget, actual result and variance. The report should also show the activity level, because a difference may be caused by volume rather than inefficiency.

For costs:

A positive result is commonly called favourable because actual cost is lower than budgeted cost. A negative result is commonly called adverse because actual cost is higher. For revenue, the direction is reversed:

A positive revenue variance is favourable, while a negative revenue variance is adverse. Organisations should state their sign convention clearly because the terms “positive” and “negative” can otherwise cause confusion.

Worked example: simple variance report

A department budgeted sales revenue of $50,000 and expenses of $32,000. Actual sales were $54,000 and actual expenses were $35,500.

The department generated $4,000 more revenue but spent $3,500 more. Its contribution improved by only $500. A conclusion based only on revenue would therefore be incomplete.

Percentage variance

Percentage variance helps compare items of different size:

For expenses in the example, the percentage variance is:

($3,500 ÷ $32,000) × 100 = 10.9375%, approximately 10.9% adverse.

Percentage variance is less informative when the budget is zero or very small. In such cases, the absolute amount and the reason for the difference should be emphasised.

Price, quantity and volume explanations

A total variance may have several causes. In a simple purchasing analysis, where actual quantity and price are available:

This total can be separated into:

The two components add to the total variance under this convention. Here, standard price is the planned price per unit, actual price is the price paid per unit, standard quantity is the quantity allowed for the actual output, and actual quantity is the quantity used. The convention assumes that the standard quantity has been adjusted for actual output; otherwise, a volume effect may be mixed into the calculation.

For certificate-level work, managers often begin with a total variance and then investigate material price, usage, labour hours, overtime, sales volume and sales price as appropriate. Not every variance requires a complex decomposition.

6. Interpreting Variances for Control

A variance is a signal for investigation, not a final judgement. A favourable variance may indicate efficiency, but it may also result from poor quality, delayed maintenance, understaffing or postponed expenditure. An adverse variance may reflect waste, but it may also result from an intentional decision to buy higher-quality materials or respond to an unexpected opportunity.

A useful investigation process is:

1. Confirm that the budget and actual figures are comparable.
2. Check the activity level and timing of the transactions.
3. Identify material or recurring variances.
4. Discuss operational causes with the responsible manager.
5. Separate controllable from uncontrollable causes.
6. Decide whether corrective action, budget revision or no action is appropriate.
7. Record the explanation and follow up in the next reporting period.

Possible causes include changes in supplier prices, exchange rates, sales volume, product mix, staff overtime, wastage, errors in coding, late invoices and changes in policy. Investigation thresholds should be proportionate to the size and risk of the variance.

Flexible-budget illustration

A cleaning department budgeted variable supplies at $4 per service and fixed costs at $6,000 per month. The original plan was 1,000 services, so the static budget was $10,000. Actual activity was 1,200 services and actual cost was $11,100.

A static comparison gives an adverse variance of $1,100. However, a flexible budget for 1,200 services is:

($4 × 1,200) + $6,000 = $10,800.

Compared with the flexible budget, actual cost is adverse by only $300. The remaining $800 of the static variance is explained by higher activity. This example shows why managers should not label a department inefficient simply because total cost increased when output also increased.

7. Illustrative Case: Riverside Repairs

The following is a fictional illustrative case.

Background

Riverside Repairs operates a small vehicle-service workshop and a retail parts counter. The owner wants monthly reports showing the performance of Workshop, Parts Sales and Administration. Previously, all rent, electricity and telephone costs were posted to general expense accounts without departmental analysis.

Problem

The business experienced rising expenses, but management could not determine whether the increase came from workshop activity, the parts counter or administration. The owner also prepared a budget using total monthly cost, even though the number of repair jobs varied substantially.

Analysis

The accountant created three cost centres and selected the following allocation bases:

Workshop materials and technician wages were charged directly to Workshop. Parts purchases and counter wages were charged directly to Parts Sales. The accountant documented the assumptions and reviewed them with the managers.

The monthly operating budget assumed 80 repair jobs and $18,000 of parts sales. Workshop variable supplies were budgeted at $45 per repair job, and fixed workshop overhead was $5,000. Actual activity was 95 repair jobs, supplies were $4,600, and fixed overhead was $5,200.

The static supplies budget was $3,600 (80 × $45), producing an apparent adverse variance of $1,000. The flexible supplies budget for 95 jobs was $4,275 (95 × $45). The activity-adjusted adverse variance was therefore $325. Management investigated the remaining difference and found higher prices for lubricants and some avoidable wastage.

Approach and solution

The accountant configured cost centres in the accounting system, introduced a cost-centre selection rule for relevant vouchers, and prepared a monthly report containing:

• budgeted activity;
• actual activity;
• flexible budget;
• actual cost;
• variance and explanation;
• responsible manager and proposed action.

The workshop manager negotiated with a supplier and introduced a measured-issue procedure for lubricants. The owner also revised the budget to reflect seasonal repair volumes rather than relying on a single annual average.

Outcome

The business obtained clearer information about departmental costs. It did not treat every variance as evidence of poor performance. Higher workshop expenditure was partly justified by higher repair volume, while the residual variance led to practical action on purchasing and wastage.

Learning points

1. A cost-centre system must be designed around decisions, not merely around software menus.
2. Shared costs require documented and reasonable allocation bases.
3. Flexible budgets produce more meaningful control information when activity changes.
4. Variance investigation should lead to explanation and action, not automatic blame.

8. Limitations, Ethics and Governance

Cost allocation is not perfectly objective. Different reasonable bases can produce different departmental results. Allocating all central costs to operating departments may also discourage managers from accepting useful support services. Reports should therefore distinguish direct controllable costs from centrally allocated or non-controllable costs.

Budgets can encourage dysfunctional behaviour. Managers may deliberately request excessive resources to create an easy target, postpone necessary maintenance to remain within budget, or cut training that is important for long-term performance. Excessive emphasis on favourable short-term variances can damage quality, safety and customer service.

Ethical budgeting requires honest assumptions, transparent documentation and appropriate challenge. Employees should not be pressured to manipulate timing, coding or estimates. Access controls and audit trails should protect the integrity of accounting data. Sensitive employee, supplier and customer information should be restricted to authorised users.

Accounting software and AI-assisted tools can help identify unusual transactions, suggest classifications and produce dashboards. However, automated recommendations may reflect incomplete data or biased historical patterns. A responsible user reviews the underlying transaction, validates the allocation basis and retains human accountability for the report.

9. Best Practices

Effective cost-centre and budget control usually follows these practices:

• define centres according to responsibility and management use;
• keep the chart of accounts and centre structure understandable;
• separate direct costs from shared costs;
• document allocation bases and review them periodically;
• use activity measures that reflect cost behaviour;
• prepare flexible budgets where volume changes materially;
• compare actual results with an appropriate budget;
• investigate significant, recurring or unusual variances;
• combine financial measures with quality, delivery and safety indicators;
• reconcile reports to the general ledger;
• protect data through authorisation, backups and audit trails;
• revise forecasts when assumptions change rather than concealing the change.

Chapter Summary

Cost centres provide a structured way to accumulate and report income and expenses by department, activity or responsibility area. Direct costs can be traced to a centre, while common costs must be allocated or apportioned using reasonable, documented bases. In a computerised accounting system, cost-centre information supplements ledger information and supports departmental reporting.

Budgets express planned activity, revenue, expenditure and cash flows. Static budgets are useful for initial planning, but flexible budgets improve performance evaluation when actual activity differs from the plan. Variance analysis compares budgeted and actual outcomes. Revenue and cost variances must be interpreted using a clear sign convention, and favourable or adverse results should be investigated rather than judged automatically.

Good management accounting links numbers to operational causes and managerial action. Reliable reports require appropriate classifications, sound allocation methods, internal controls, ethical conduct and informed professional judgement.

Key Terms

Management accounting: Internal accounting information used for planning, control and decision-making.

Responsibility accounting: Reporting performance according to areas and managers who can influence results.

Cost object: Any product, service, project, customer or activity for which cost is measured.

Cost centre: A department, location or activity for which costs are accumulated.

Production cost centre: A centre directly involved in producing goods or services.

Service cost centre: A support centre that provides services to other departments.

Direct cost: A cost economically traceable to a particular cost object.

Indirect cost: A cost that cannot be economically traced to one cost object.

Fixed cost: A cost that remains constant in total within a relevant range and period.

Variable cost: A cost that changes in total with activity.

Allocation: Assignment of an entire cost to one cost centre.

Apportionment: Distribution of a common cost among several cost centres.

Absorption: Charging cost-centre costs to products or services using a rate.

Budget: A quantified plan for a future period.

Static budget: A budget prepared for one planned activity level.

Flexible budget: A budget adjusted for the actual activity level.

Variance: The difference between a planned amount and an actual amount.

Favourable variance: A result generally beneficial to performance, such as higher revenue or lower cost than planned.

Adverse variance: A result generally detrimental to performance, such as lower revenue or higher cost than planned.

Controllable cost: A cost that a manager can influence within a relevant period.

Review Questions

Short Answer Questions

1. What is a cost centre, and how does it differ from a cost object?
2. Distinguish between allocation and apportionment.
3. State two purposes of preparing a budget.
4. What is the difference between a static budget and a flexible budget?
5. Why should a favourable variance not always be treated as evidence of good performance?

Long Answer Questions

1. Explain the role of cost centres in responsibility accounting and describe the controls needed for reliable cost-centre reporting.
2. Discuss the factors that should be considered when selecting an allocation basis for shared costs.
3. Explain how a small business can design and implement a cost-centre structure in Tally or a similar accounting system.
4. Describe the budgeting process for a department, including the distinction between profit planning and cash planning.
5. Explain the benefits and limitations of variance analysis for managerial control.

Analytical / Application Questions

1. A department budgets rent of $30,000 for premises of 1,500 square metres. The Sales Department uses 450 square metres. Calculate its share of rent and explain the assumption behind the allocation.
2. A service centre budgets variable supplies at $6 per service and fixed costs of $7,000 for 1,000 services. Actual activity is 1,300 services and actual cost is $15,200. Prepare a flexible budget and calculate the activity-adjusted cost variance.
3. A manager reports that actual expenses exceeded the budget and recommends reducing staff immediately. Identify at least three additional pieces of information that should be reviewed before accepting the recommendation, and explain why each is relevant.

Multiple Choice Questions with Answers

Question 1

Which statement best defines a cost centre?

A. A legal entity with a separate bank account

B. A department or activity for which costs are accumulated and reported

C. A customer who purchases goods on credit

D. A ledger used only for cash transactions

Correct Answer: B. A department or activity for which costs are accumulated and reported

Question 2

Rent of $24,000 is apportioned by floor area. Department A occupies 300 m² of a total 1,200 m². What amount is assigned to Department A?

A. $4,800

B. $6,000

C. $8,000

D. $9,600

Correct Answer: B. $6,000

Question 3

Which is normally a direct cost of a workshop cost centre?

A. The workshop technician’s wages

B. Head-office rent allocated by floor area

C. The managing director’s salary

D. Insurance for the entire building

Correct Answer: A. The workshop technician’s wages

Question 4

What is the main advantage of a flexible budget?

A. It eliminates all estimation

B. It adjusts planned costs for the actual activity level

C. It records only cash transactions

D. It guarantees that actual results will equal the budget

Correct Answer: B. It adjusts planned costs for the actual activity level

Question 5

Budgeted revenue is $40,000 and actual revenue is $44,000. The revenue variance is:

A. $4,000 favourable

B. $4,000 adverse

C. $84,000 favourable

D. 10% adverse

Correct Answer: A. $4,000 favourable

Question 6

Budgeted expenses are $25,000 and actual expenses are $27,500. The cost variance is:

A. $2,500 favourable

B. $2,500 adverse

C. $52,500 favourable

D. 10% favourable

Correct Answer: B. $2,500 adverse

Question 7

A business budgets variable cost at $5 per service and fixed cost at $4,000. At 1,200 services, what is the flexible budget?

A. $5,000

B. $6,000

C. $9,200

D. $10,000

Correct Answer: C. $9,200

Question 8

Which allocation basis is generally most appropriate for electricity used by a machine?

A. Number of customers

B. Machine-hours or meter readings

C. Number of directors

D. Annual sales price only

Correct Answer: B. Machine-hours or meter readings

Question 9

Why should a variance be investigated before managerial action is taken?

A. Every variance is caused by fraud

B. A variance may result from activity changes, timing or uncontrollable factors

C. Budgets are never useful

D. Actual figures are always incorrect

Correct Answer: B. A variance may result from activity changes, timing or uncontrollable factors

Question 10

Which control most directly supports reliable cost-centre reporting?

A. Deleting old cost centres each month

B. Allowing every employee to alter allocation bases

C. Reconciling cost-centre totals to the general ledger

D. Posting all expenses to one general account

Correct Answer: C. Reconciling cost-centre totals to the general ledger