Zero-Based Budgeting

Zero-based budgeting is a method in which every cost is justified from nothing each cycle rather than carried forward from last year’s number. Managers build the budget up from activities, not down from last year’s base with a percentage adjustment on top.

The name is literal. Every line starts at zero, and a manager who wants £40,000 for travel has to argue for all of it, not for the £3,000 increase.

That is both the appeal and the cost. It surfaces spending nobody can defend any more — and it takes far more management time than rolling last year’s numbers forward.

Key takeaways

• Every cost starts at zero each cycle and has to be justified on its own merits.
• Spending is broken into decision packages that are ranked against each other, not against last year.
• The method finds buried cost, but it is slow — most firms run it on a two or three year rotation.
• It began at Texas Instruments in the late 1960s and returned through consumer goods in the 2010s.

How it works

Zero-based budgeting breaks spending into decision packages. Each package describes one activity, what it costs at a minimum service level, what the next increment of spending buys, and what breaks if the money goes elsewhere.

The sequence inside a cycle is consistent:

1. List the discrete activities the unit actually performs.
2. Cost each activity at a minimum viable level, then at one or two higher increments.
3. Attach the cost driver that explains why the number moves.
4. Rank every package across the unit against all the others.
5. Fund the ranked list until the money runs out, then stop.

Cost drivers are what make it stick. Tying a cleaning budget to square metres, or a service desk to ticket volume, turns an argument about last year’s number into an argument about the underlying unit.

The unit of review is the real change. Conventional cost center analysis asks who overspent, while zero-based budgeting asks whether the activity should be funded at all.

Government tried it at scale first. In an April 1978 memorandum, President Jimmy Carter told agency heads to use zero-base budgeting as the sole basis for their 1980 budget requests.

It still resurfaces in public finance. Launching the December 2024 spending round, HM Treasury said a zero-based review was last undertaken 17 years ago across United Kingdom departments.

The effort is the catch. A full pass can take a finance team months — which is why most companies pair a periodic zero-based review with a rolling forecast in between.

It also needs somewhere to land. Without a cost transformation program holding the savings, cut budgets drift back up within two cycles as managers quietly rebuild the lines.

Examples

Zero-based budgeting has had two clear lives: a public-sector run through the 1970s and a corporate revival led by consumer goods in the 2010s. Both were driven by the same complaint about creeping cost.

Texas Instruments is where it started. Peter Pyhrr built the method there in the late 1960s and set it out in Harvard Business Review in November 1970, which is how it reached a wider audience.

Georgia adopted it next. Jimmy Carter brought Pyhrr in as governor in the early 1970s, then carried the method into the federal budget process after taking office in 1977.

Consumer goods revived it forty years later. 3G Capital applied zero-based budgeting at Anheuser-Busch InBev and then at Kraft Heinz after the 2015 merger — rivals including Unilever and Mondelez followed soon after.

Each wave ended the same way. The savings were real in the first year, and the discipline faded once the people who ran the exercise moved on.

Public finance keeps coming back to it. The United Kingdom framed its 2025 spending review around the zero-based exercise launched the previous December, and several US state legislatures have debated a similar rotation.

Related terms

Zero-based budgeting is one of several ways to set a budget, and it is easiest to understand against the methods it competes with. These four terms are the ones most often confused with it.

• Activity-Based Budgeting: the method that builds budgets from the activities needed to hit a planned output level.
• Budget Variance Analysis: the review of the gap between budgeted and actual spend once the period closes.
• Capital Budgeting Techniques: the appraisal methods used for long-lived investments rather than annual operating cost.
• Zero-Based Outsourcing: the sourcing equivalent, where every function is reassessed for whether it belongs in house.

FAQ

How often should zero-based budgeting be run?

Most organisations run a full pass every two to three years and use lighter reviews in between, because an annual rebuild costs more management time than it saves.

Does zero-based budgeting always cut costs?

No. It reallocates as often as it cuts, and the usual result is money moving from legacy activities to ones with a clearer case.

What is a decision package?

A decision package is a written case for one activity, setting out what it does, what it costs at a minimum level, and what the next increment of funding would buy.

Why do zero-based budgeting programmes fail?

Usually because the savings are never locked into the following year’s targets, so the cut lines creep back. Weak cost-driver data is the other common cause.

How is it different from activity-based budgeting?

Activity-based budgeting starts from a planned output level and works out the activities needed to reach it, while zero-based budgeting questions whether each activity is worth funding at all.

Is zero-based budgeting only for large companies?

No, and smaller firms often find a full pass easier because there are fewer activities to document.

Compare providers in the Outsource Accelerator directory when a zero-based review says a function no longer belongs in house.