Zero-Based Budgeting
Also known as: ZBB, Zero-Base Budgeting, Decision-Package Budgeting, Build-From-Zero Budgeting
Zero-based budgeting is a method of preparing a budget in which every activity must be justified from scratch each cycle rather than inheriting the previous year's allocation as a baseline. Developed by Peter Pyhrr at Texas Instruments and described in his 1970 Harvard Business Review article and 1973 book, it breaks the organisation into decision units, builds 'decision packages' that describe each activity at alternative funding levels, ranks all packages by priority, and funds them in order until the budget is exhausted. In government it was famously adopted by the State of Georgia under Governor Jimmy Carter and later promoted federally, as a counter to incremental budgeting's automatic perpetuation of past spending.
Key highlights
- Challenges the incremental status quo by requiring every activity to justify its existence, exposing low-value spending that perpetually survives.
- Forces explicit priority ranking across unlike activities, making resource trade-offs transparent to decision-makers.
- The alternative-service-level structure allows partial funding and reveals the marginal value of each spending increment.
- Links funding decisions to activity purpose and workload, improving managers' understanding of what their budget actually buys.
Intuition
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How it works
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When to use it
Use zero-based budgeting when leadership wants to challenge entrenched spending, reallocate resources toward higher priorities, or respond to fiscal pressure that demands cuts be made deliberately rather than across the board. It suits discretionary operating activities that can be sensibly described at alternative service levels and ranked against one another. It assumes managers have the time, data and analytical capacity to build and rank packages, and that activities are genuinely discretionary rather than mandated. It is poorly suited to budgets dominated by legally mandated entitlements, debt service or fixed contractual commitments where there is little real discretion, and its full annual application is so labour-intensive that many organisations adopt a periodic or modified version instead of a yearly zero base.
Strengths & limitations
- Challenges the incremental status quo by requiring every activity to justify its existence, exposing low-value spending that perpetually survives.
- Forces explicit priority ranking across unlike activities, making resource trade-offs transparent to decision-makers.
- The alternative-service-level structure allows partial funding and reveals the marginal value of each spending increment.
- Links funding decisions to activity purpose and workload, improving managers' understanding of what their budget actually buys.
- Extremely labour-intensive: preparing and ranking decision packages for an entire organisation each year imposes heavy analytical and administrative cost.
- Ranking fundamentally unlike activities on a single scale involves subjective judgement that can be gamed or politicised.
- Much public spending is mandated, contractual or entitlement-driven, leaving little genuine discretion to which a zero base can apply.
- The effort often produces marginal change relative to its cost, leading many adopters to abandon or dilute it after a few cycles.
Common pitfalls
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Applications
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Frequently asked
How does zero-based budgeting differ from incremental budgeting?
Incremental budgeting takes the prior year's allocation as a given base and debates only the marginal change up or down. Zero-based budgeting refuses any base: every activity starts at zero and must be re-justified and ranked against all others each cycle. The practical effect is that long-standing programs must compete directly with new proposals for funding, rather than being protected by the inertia of having been funded before.
Why did the U.S. federal government abandon full ZBB?
The full annual application proved enormously labour-intensive, generating mountains of decision packages whose preparation and ranking consumed staff effort out of proportion to the reallocation it produced. Much federal spending was also mandated or entitlement-driven, leaving little discretion for a zero base to act on. By the early 1980s the formal requirement was dropped, though the core ideas survived in modified and periodic forms.
Can zero-based budgeting be applied without doing it every year?
Yes, and most successful adopters do exactly this. A 'modified' or rotating approach applies the zero-based discipline to a subset of programs each year, or conducts a full zero-based review only every few years during a spending review, while using lighter incremental methods in between. This captures much of the reallocation benefit without the unsustainable annual workload that doomed the comprehensive version.
Sources
- 1.Pyhrr, P. A. (1970). Zero-Base Budgeting. Harvard Business Review, 48(6), 111–121.
- 2.Pyhrr, P. A. (1973). Zero-Base Budgeting: A Practical Management Tool for Evaluating Expenses. New York: John Wiley & Sons.ISBN 9780471702344
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Cite this page
ScholarGate. (2026, June 22). Zero-Based Budgeting. ScholarGate. https://scholargate.app/public-administration/zero-based-budgeting