Plain definition
Incremental budgeting starts with the previous period’s approved budget or actual run rate and changes selected lines for known movements. It is efficient when the business is stable, because managers do not rebuild every number from zero. Its risk is that old spending survives merely because it was there before.
Illustrative example
Monetary examples use Saudi riyals (SAR). The same principles apply in other currencies.
A department’s prior travel budget was . For the next year, the manager proposes a 5% increase, making . On review, finance finds related to a trade show that has ended, for customer visits that will continue, and for routine travel. The manager replaces the blanket uplift with for continuing activity plus for a new regional launch, giving a more deliberate budget of .
The revised figure is lower, but the purpose is not arbitrary cost cutting. It makes each remaining spend traceable to an activity and lets the business decide whether the launch deserves the extra travel before it commits the cash.
| Continuing travel | |
|---|---|
| New regional launch | |
| Deliberate next-year budget |
Incremental budgeting is a starting method, not evidence that the prior amount was necessary. It works best when the base period is understood and material changes are explicit.
Why it matters
A percentage increase can hide an obsolete contract, a completed project, or a cost that rose because of an unusual one-off event. It can also underfund a genuine change in workload. Reviewing the base prevents managers from treating last year’s allocation as the reason for this year’s decision.
Practical consequence
Begin with a named base: prior approved budget, latest actual run rate, or another documented measure. For each material line, identify what continues, what ends, what changes in price or volume, and what new initiative is proposed. Ask the budget owner to supply supporting contracts, usage data, or activity plans, then retain the bridge from base to final amount. Incremental budgeting is unsuitable as the only method after a major restructuring or business-model change, when the old base no longer describes the work.