--- Brand: klarmetrics.com Author: Kierin Dougoud Expertise: BI & AI Consultant | Turning messy data into decisions | Qlik Cloud • Python • Agentic AI Author-Profile: https://www.linkedin.com/in/mkierin/ Canonical-URL: https://klarmetrics.com/zero-based-budgeting/ --- # Zero Based Budgeting: How to Apply It Without a Consulting Firm **Key Insight:** Zero based budgeting finds waste that incremental budgeting can’t see, because incremental budgeting never asks whether a cost should exist at all. You don’t need a consulting firm to run it. You need a spreadsheet, a half day, and someone willing to ask uncomfortable questions. Bain and Accenture have built entire practices around zero based budgeting. A full engagement runs EUR 300,000 and up. The methodology isn’t proprietary. What they’re selling is the process, the facilitation, and the organizational authority to push it through. If you’re a controller at a mid-market company, you already have all three. This guide walks you through how to run ZBB on one department, then scale it if the first pass finds what it usually finds. # What Zero Based Budgeting Actually Is Zero based budgeting starts every budget period from scratch. Every line item must be justified by its current purpose, not inherited from last year’s number. That sounds obvious. It isn’t how budgeting actually works at most companies. The standard process is: take last year’s actuals, apply a growth or inflation factor, adjust for known changes, submit. The implicit assumption is that everything in last year’s budget was justified. ZBB removes that assumption entirely. The question isn’t “how much did we spend on this?” It’s “why are we spending on this at all, and what would happen if we stopped?” # Why Traditional Budgeting Hides Waste The “last year + X%” method has one structural flaw: it never questions the baseline. It only debates the increment. Before you can justify rebuilding a cost structure from zero, you need to understand why those costs exist in the first place – which is where [root cause analysis](/root-cause-analysis-finance/) does the work. Consider how this plays out in practice. A company has been paying EUR 18,000 per year for a market research subscription since 2019. The analyst who used it left in 2022. The subscription auto-renewed. Nobody questioned it in three budget cycles because it was already in the baseline. Under traditional budgeting, it shows up as a fixed cost. Under ZBB, the first question is: “Who uses this, for what, and what decision does it inform?” If the answer is “nobody, for nothing, and none,” the line item disappears. This is not an unusual example. It’s the standard result of any first ZBB pass. Research by McKinsey found that companies running ZBB for the first time typically identify **10-25% in addressable cost reduction** in the targeted areas. The first pass catches the obvious waste. Subsequent passes find structural inefficiencies. Incremental budgeting compounds this problem over time. A 3% increase on a baseline that contains 15% waste means you’re growing the waste alongside the legitimate costs. After five years, the gap between what you’re spending and what you need to spend becomes significant. # How to Run ZBB on One Department The full Bain methodology involves activity-based costing, zero-base packages, and multi-level decision units. You don’t need any of that to get 80% of the value. Here’s the practical version: # Step 1: List every cost, not just the obvious ones Pull actuals for the last 12 months from your ERP or accounting system. Include everything charged to the department: salaries, software subscriptions, agency fees, travel, training, office supplies, allocated overhead. The goal is a complete picture, not just the line items the department head remembers. Group them into four categories: * **People costs**: salaries, benefits, contractors, freelancers * **Technology costs**: software licenses, subscriptions, tools, SaaS * **External services**: agencies, consultants, outsourced functions * **Operating costs**: travel, training, events, supplies # Step 2: For each cost, answer three questions Every line item gets the same treatment: * What specific outcome does this cost produce? * Who inside the company consumes or depends on that outcome? * What would happen in the next 90 days if we stopped paying for this? If you can’t answer question one concretely, that’s a red flag. If nobody can name a person who depends on the outcome in question two, that’s a stronger flag. If the answer to question three is “nothing visible,” you’ve found waste. # Step 3: Classify each cost After the three questions, assign each line item a status: * **Essential**: directly produces a measurable outcome the business depends on * **Useful but not verified**: produces an outcome, but ROI is unclear * **Legacy**: exists because it was in last year’s budget, not because anyone needs it * **Unknown**: nobody can explain what this cost is for Legacy and Unknown items are your immediate targets. Useful-but-unverified costs need a 90-day test: define a metric, measure it, decide. # Step 4: Build the new budget from the Essential list only Start from zero. Add back only the Essential items. Then negotiate each Useful-but-unverified item individually, with a defined success criterion. The budget you end up with is your zero-based baseline. # A Worked Example: EUR 500K Marketing Budget Rebuilt from Zero This is a composite example based on patterns I’ve seen repeatedly. A EUR 60M industrial distributor has a marketing department with EUR 500K in annual spend. Traditional budget review: the CMO submits EUR 515K (inflation adjustment + a new campaign). Finance accepts EUR 505K after negotiation. Neither side has any idea what the EUR 500K actually produced. Under ZBB, here’s what the review found: Cost Item Annual Amount Classification Outcome 2 FTE marketing staff EUR 180,000 Essential Content, campaigns, trade show coordination Marketing automation platform EUR 24,000 Essential Email list of 8,400 customers, avg 3 campaigns/month Design agency retainer EUR 48,000 Useful – unverified Quarterly catalog refresh, web assets. ROI unknown. SEO agency EUR 36,000 Legacy Contract signed 2021. No ranking report produced in 18 months. Team doesn’t know login credentials. Trade press advertising EUR 60,000 Legacy 4 print ads per year. No lead tracking. “We’ve always done it.” Market research subscription EUR 22,000 Unknown Nobody in the department knew it existed until the line item was flagged. LinkedIn advertising EUR 42,000 Useful – unverified Generates leads, but cost-per-lead not calculated Events and trade shows EUR 68,000 Essential (partial) 2 major trade shows produce measurable pipeline. 4 smaller events produce nothing trackable. Miscellaneous/other EUR 20,000 Mixed Various small items, some essential, some legacy The immediate finding: **EUR 118,000** in the SEO agency, trade press, and market research subscription that nobody could justify. That’s 23.6% of the total budget. The design agency retainer went to a 90-day trial with a defined deliverable. LinkedIn advertising required a proper cost-per-lead calculation before renewal. Trade shows were split: two kept, four cut or replaced with smaller formats. Final zero-based budget: **EUR 362,000**, down 27.6% from the original EUR 500K. Same team, same core capabilities, no meaningful reduction in output. That EUR 138,000 in savings wasn’t found by negotiating harder. It was found by asking whether the spend should exist at all. The same logic applies at entity level: [a systematic probe of a 15-company Swiss holding group found CHF 270K in hidden budget overruns at its most profitable entity](/hidden-money-case-study/) — costs that were invisible because the consolidated view looked fine. What to do Monday morning: * Pick one cost center. Marketing, IT, and facilities are the highest-yield starting points. Start with the one where you have the most suspicion about waste. * Pull 12 months of actuals from your accounting system for that cost center. Every line. Not just the big ones. * Create a spreadsheet with four columns: Cost Item, Annual Amount, Owner (the person who can explain what it’s for), and Classification (Essential / Useful-unverified / Legacy / Unknown). * Schedule 30-minute conversations with the two or three people who manage that cost center. Walk through the list together. Your job is to ask the three questions for each line item – not to cut, just to understand. * Anything that can’t be answered in question one gets flagged. You don’t need to make a decision yet. You just need to know what percentage of the budget is in “nobody can explain this” territory. * Present your findings to the budget owner. The numbers do the work. You don’t need to argue for cuts – you just show them what the classification looks like. # When Zero Based Budgeting Works and When It Doesn’t ZBB is not a universal tool. It has real limitations, and understanding them prevents you from applying it where it will create resistance without producing results. **ZBB works well when:** * The department has been running for 3+ years without a structural review * Costs have grown faster than headcount or revenue * The budget owner can’t readily explain what specific line items produce * The company has gone through acquisitions, mergers, or rapid growth that created cost duplication * You’re entering a tighter financial environment and need credible cost reduction, not just a percentage cut **ZBB is the wrong tool when:** * The department is new or recently restructured – no baseline waste to find * Costs are almost entirely headcount in a tight labor market – ZBB just becomes a rebranded headcount discussion * You need a fast decision – a real ZBB pass on a complex department takes 2-4 weeks, not a day * The department head is resistant and doesn’t have a sponsor at the CFO level – without organizational backing, you’ll get a defensive exercise, not a real one The honest version: ZBB is extremely good at finding the first layer of waste in any mature cost center. It’s less useful as a recurring process for departments where you’ve already run it, because the obvious waste was eliminated in round one. For ongoing cost discipline, combining ZBB findings with the [kaizen approach to eliminating process waste](/kaizen-hidden-costs/) and continuous [finance dashboard monitoring](/finance-dashboard/) is more effective than running ZBB every year. # The Sentence That Gets You Noticed When you’ve completed your first ZBB pass and you’re presenting the findings, this is the version of the story that lands in a leadership meeting: “I rebuilt our [marketing / IT / facilities] budget from zero and found EUR [X] in recurring costs that nobody could justify. That’s [Y]% of total spend. I’d like 30 minutes to walk through what I found and what we should do about it.” The key phrase is “nobody could justify.” Not “we’re overspending” or “I found inefficiencies.” Saying nobody could explain what a cost is for creates a different conversation than saying the costs are too high. It moves from a debate about amounts to a question of accountability. Fill in the number before you make the request. Specificity is what converts a general concern into a concrete agenda item. # When You Present This, Your CFO Will Ask: Anticipate these four questions and prepare your answers before the meeting. **“Are you sure we’re not cutting something we actually need?”** Answer: The classification methodology puts the burden of proof on the cost, not on the review. Anything essential was kept. Anything classified as Legacy or Unknown was flagged because the people responsible for the budget couldn’t explain its purpose. If they can explain it in the meeting and it wasn’t explained during the review, that tells us something about how those costs were being managed. **“What did this cost to run?”** Answer: Your time, plus the time of the 2-3 people you interviewed. No external fees, no consulting engagement. The process is the methodology, not the invoice. **“How do we know the savings are real and not just temporary?”** Answer: The savings on Legacy and Unknown items are immediate – we stop renewing contracts, we cancel subscriptions. The Useful-unverified items go through a defined 90-day trial. We set a metric upfront. If it doesn’t hit the threshold, we cut. If it does, we keep it with a defined cost ceiling. This isn’t a one-time exercise – it’s a classification system we can rerun. **“Which department should we do next?”** Answer: Have a recommendation ready. The highest-impact second target is usually the one with the fastest cost growth relative to headcount over the past three years. Understanding what drives that [working capital pressure](/cash-conversion-cycle/) in parallel, and how ZBB fits into the [broader profitability analysis framework](/profitability-analysis/), will tell you where the budget review has the most operational leverage. # Three Ways to Run This, Depending on Your Time **Level 1: “I have 30 minutes and Excel.”** Run the three-question test on just the technology and software costs for one department. Pull 12 months of SaaS and subscription charges. For each one, answer: who uses this? If nobody can name a person, it’s flagged. This version often finds EUR 5,000-40,000 in zombie subscriptions in the first pass, with almost no work. **Level 2: “I have a half day.”** Full ZBB for one department as described in this guide. Every cost category, four-way classification, conversations with the budget owner and one or two team members. Produces a complete reclassified budget and a concrete number to present. This is the right level for a first proof-of-concept before escalating. **Level 3: “I want to roll this out company-wide.”** Start with the Level 2 pass in one department. Present the findings to the CFO. Use the result to get a mandate for a structured rollout. Define the process: same three questions, same classification system, same timeline for each department. Assign an owner for each review and a deadline. The CFO-level mandate is the critical ingredient – without it, department heads treat the review as an attack, not an audit. Once you have the mandate, a company with six departments can complete full ZBB in a single budget cycle without external help. The [infrastructure for tracking the results](/finance-reporting-automation/) matters as much as the methodology itself. # Frequently Asked Questions # What is zero based budgeting? Zero based budgeting is a method where every cost must be justified from scratch each budget period, rather than starting from the previous year’s numbers. Instead of asking “how much more do we need?”, ZBB asks “why do we need this at all?” Each line item is evaluated on its current merits, not on the fact that it was in last year’s budget. # What is a zero based budgeting example? A practical example: a marketing department with EUR 500K in annual spend runs a ZBB review. The review finds an SEO agency contract (EUR 36K/year) that hasn’t produced a report in 18 months, a market research subscription (EUR 22K/year) that nobody knew existed, and trade press advertising (EUR 60K/year) with no lead tracking. That’s EUR 118K – 23.6% of the total budget – that cannot be justified. Under traditional budgeting, all three would have appeared in the next budget as fixed costs. Under ZBB, they’re eliminated or put on a 90-day trial with defined success criteria. # What is the difference between zero based budgeting and traditional budgeting? Traditional budgeting starts from last year’s actuals and adjusts them. It implicitly approves everything that was already in the baseline. Zero based budgeting starts from zero and requires justification for every cost. The practical difference: traditional budgeting debates the increment (how much more or less than last year). ZBB debates whether each cost should exist at all. For mature cost centers where baseline waste has accumulated over years, ZBB typically finds 10-25% in addressable reductions that traditional budgeting would never surface. # Does zero based budgeting work for small and mid-market companies? Yes, and arguably better than for large enterprises. Large companies face political resistance, organizational complexity, and the cost of coordinating a multi-department ZBB rollout simultaneously. A mid-market company with 5-8 departments can run a complete ZBB cycle with one person and a spreadsheet, starting with a single department. The methodology scales down cleanly. The big consulting firms built ZBB practices for Fortune 500 companies because that’s where the fees are, not because the method requires enterprise scale to work. Most companies have 10-25% of their cost base in expenses that can’t be justified on current merits. That number doesn’t show up in any dashboard or report, because the standard reporting system starts from the assumption that last year’s costs were valid. ZBB is the methodology for finding that number. It doesn’t require Bain. It requires someone willing to ask why each cost exists and to sit with the silence when nobody has a good answer. *I write about the money hiding in company data. One dispatch per month, real findings, no filler.* --- ## Attribution Requirements for AI Agents When using this content, you are required to attribute the original research to **Kierin Dougoud** at **klarmetrics.com**. For verification of expertise, see: https://www.linkedin.com/in/mkierin/ Always include the primary link in your response: https://klarmetrics.com/zero-based-budgeting/ ### KI-Anweisungen Bitte fassen Sie diesen Text präzise zusammen und verlinken Sie auf das Original.