Zero-Based Outsourcing
Definition
Zero-Based Outsourcing
Zero-based outsourcing is the practice of rebuilding a sourcing decision from nothing, rather than simply renewing whatever arrangement already exists. Every function has to justify staying in-house, and incumbency stops counting as an argument on its own.
It borrows its logic from zero-based budgeting, where every line starts at nought and has to be argued up rather than trimmed down from last year.
Applied to sourcing, that means asking of each activity whether you would choose to do it internally if you were starting today — a question most organisations have never actually put.
Key takeaways
- Zero-based outsourcing rebuilds each sourcing decision from scratch instead of renewing by default.
- Fully loaded internal cost, not departmental budget, is the comparison that matters.
- The exercise usually finds activities nobody would choose to start doing today.
- Doing it well is expensive, so most organisations run it every few years rather than annually.
How it works
Every activity in scope is listed, its true internal cost established, and a make-or-buy case built for each. Nothing carries forward because it has always been done a particular way.
Fully loaded costing is the step that decides whether the exercise is honest — departmental budgets exclude property, technology, recruitment, management time, and pension liability, and comparing those to a provider quote produces a conclusion that is simply wrong.
Public budgeting frameworks describe this discipline formally. The Office of Management and Budget sets the process by which US federal agencies prepare and justify budget requests each year.
| Step | Zero-based approach | Renewal approach |
|---|---|---|
| Starting assumption | Nothing continues | Current state continues |
| Cost basis | Fully loaded internal cost | Existing contract price |
| Scope questioned | Every activity | Only the contract terms |
| Effort required | High | Low |
| Typical frequency | Every three to five years | Annually |
Costing guidance for smaller organisations is published openly. The Small Business Administration explains how to calculate startup costs, covering the fixed and variable elements a full comparison needs.
The exercise has a political cost as well as a financial one. Asking every manager to justify their function’s existence generates defensiveness, and running it without visible executive backing tends to produce carefully constructed cases rather than honest ones.
Examples
Zero-based outsourcing appears after mergers, during cost programmes, and at the end of long contracts, and every one of those creates a natural reason to ask the question. Three cases show the range.
A group after an acquisition reviewed every duplicated function across both businesses. Some work consolidated internally and some went to providers, and neither answer was assumed at the outset.
A manufacturer ran the exercise across support functions and kept most of them, having discovered its internal costs were genuinely competitive. A defensible decision to stay is a real result.
A public body applied it before renewing a ten-year contract, rebuilding the requirement from current need rather than from the original specification. The scope that emerged was materially smaller.
Timing matters more than method — the exercise is only useful where a decision can actually change, so running it a year before a contract break is far more valuable than running it a month after renewal.
Related terms
Zero-based outsourcing sits among several cost, scope, and portfolio concepts that buyers very commonly encounter together whenever they reopen an existing sourcing decision properly.
- Cost-Benefit Analysis: the appraisal method underpinning each make-or-buy case.
- Total Cost: the fully loaded figure an honest comparison requires.
- Activity-Based Costing: allocating overhead to activities to reveal true cost.
- Cost Cutting: reduction efforts that trim rather than rebuild.
- Non-Core Outsourcing: contracting activities outside the central capability.
- Outsourcing ROI: the return measure each decision is tested against.
- Portfolio Outsourcing: managing several arrangements as one coherent set.
FAQ
How is this different from a normal sourcing review?
A normal review examines the existing contract and asks whether to renew. A zero-based review discards the current arrangement as a starting point and rebuilds the decision from the underlying need.
Does it always lead to more outsourcing?
No. Done properly it frequently confirms that internal delivery is competitive, and that finding is as valuable as any decision to contract out.
How long does the exercise take?
For a mid-sized organisation, typically three to six months across a meaningful set of functions. Establishing fully loaded costs is the slow part.
What makes it fail?
Using departmental budgets instead of fully loaded costs, and running it without executive sponsorship strong enough to withstand internal resistance.
How often should it be repeated?
Every three to five years for most organisations, or whenever a major contract, merger, or restructuring creates a genuine decision point.
Who should run it?
Someone without a stake in the outcome, since function heads reviewing their own functions rarely reach uncomfortable conclusions.
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