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Budgetary slack

Budgetary slack is the deliberate inclusion of an easier performance margin, such as understating achievable revenue or overstating necessary cost. It can protect managers against uncertainty or increase the chance of earning a bonus, but may distort resource allocation and conceal capacity. Distinguish deliberate bias from an evidence-based allowance for risk or normal loss. Review incentives, information asymmetry and negotiation practices rather than assuming every conservative forecast is dishonest.

Worked example

A manager reasonably expects to need 1,000 labour hours but requests 1,200 solely to ensure the department will beat its cost target.

Common mistake

A justified contingency is not automatically slack. Identify the evidence and purpose before judging the estimate.

Where it appears in your exams

QualificationExamRelationshipPeriod
ACCA MA Direct September 2026–June 2027
ACCA PM Direct September 2026–June 2027
FIA FMA Direct September 2026–June 2027