Deloitte / Big Four Advisory vs iii Partners
When PE operating partners and independent sponsors need to improve the profitability of a labour-heavy portfolio company, Deloitte and the other Big Four firms are often the first call. They bring global reach, brand credibility, and deep implementation benches. But their model is built around delivering a project and billing for it — not standing behind what it earns. This page lays out exactly where the two approaches differ and where each one genuinely wins.
| Feature | iii Partners | Deloitte / Big Four Advisory |
|---|---|---|
| Engagement model | Outcome-based: iii is paid for measurable profit improvement over time, not for the hours or the build. | Project-based: Deloitte is paid a fixed or time-and-materials fee once the engagement closes, regardless of whether margin structurally changes. |
| Alignment after go-live | iii governs, owns, and operates the AI-native stack on the client's behalf — our incentive stays tied to the business's performance. | Big Four teams typically disengage at go-live; ongoing value capture is the client's responsibility or a separate, re-priced retainer. |
| Scope of delivery | Five integrated pillars built and operated as one machine — instrumentation, AI stack, operations, governance, and outcome measurement — sold as a single result. | Typically scopes and prices each workstream separately (strategy, technology, change management); integration across streams is the client's coordination burden. |
| Target asset fit | Purpose-built for labour-heavy, low-margin businesses (>$500k EBITDA) where repetitive human-process cost is the primary lever. | Designed to serve large enterprise clients; labour-heavy mid-market businesses are rarely the primary market and often receive junior teams. |
| Entry point | Short, risk-reversed diagnostic first — proves the margin lift before any larger commitment is made. | Engagements typically begin with a paid strategy or assessment phase whose output is a recommendation deck, not a proved profit number. |
| Published governance standard | Outcomes governed by a published standard that the client can hold iii accountable to. | Methodology is proprietary and internally defined; no independently published performance standard the client can reference. |
| Portfolio leverage for sponsors | Selling one sponsor reaches an entire portfolio — iii's model is designed to replicate the machine across assets. | Each portfolio company is typically a separate engagement, re-scoped and re-priced from scratch with no built-in replication mechanism. |
The difference that matters
iii is paid for the profit improvement it produces, not for the work it does to produce it — a structural alignment the Big Four model is commercially unable to replicate at the engagement level.
FAQ
- Can a Big Four firm and iii Partners work together on the same asset?
- Yes. The Big Four are strong at enterprise-wide strategy and change management at scale. iii's five-pillar machine is focused on instrumenting and operating the specific labour-heavy processes where repetitive cost lives. The two are not mutually exclusive, though iii's outcome-based model means it is accountable in ways a project engagement is not.
- Is iii Partners cheaper than Deloitte?
- The fee structures are structurally different, not just differently priced. Contact iii Partners directly to understand how the outcome-based model compares to a project fee for a specific asset.
- How do I know iii can deliver what a Big Four implementation bench can?
- iii built its five-pillar machine to run its own companies first — it is not a methodology applied to a client's business for the first time. The risk-reversed diagnostic at the start of any engagement is specifically designed to prove the lift on your asset before you commit to a larger scope.
- What happens if the profit lift does not materialise?
- iii's model is governed by a published standard and the engagement is structured around a proved, measurable outcome. The diagnostic phase exists precisely so that the lift is demonstrated before the larger commitment — reducing the risk that a full engagement produces no measurable result.