A chief executive in Dubai told us they were looking for a fractional CFO. What they described over the next ten minutes was an interim appointment, and the difference was going to cost them about four months.
The five words are used as if they were synonyms in this market. They are five different purchases, with five different contracts and five different ways of going wrong.
The table
| Instrument | The seat | The clock | Who owns the outcome | Ends when |
|---|---|---|---|---|
| Fractional | A real C-suite seat, part of the week | Ongoing, two or three days | The leader | It stops being useful |
| Interim | A vacant seat, full-time | Full-time, three to twelve months | The leader | The permanent appointment starts |
| Consultant | No seat | A project with an end date | The client | The work is delivered |
| Advisor | No seat | A few hours a month | The client | Either side stops calling |
| Non-executive director | A board seat | Board and committee meetings | The board, collectively | The term ends |
Fractional
A senior executive holds one C-suite seat at a company for an agreed part of the working week, under a business-to-business contract, and owns a named metric.
Buy it when the seat is genuinely needed, genuinely senior, and genuinely not a full-time job at this size of company. The classic case is a company between AED 20m and AED 100m of revenue that needs the judgement of a leader it cannot yet employ.
It fails when the leader is given a title and no authority. A fractional CMO who cannot direct the marketing team is an advisor being paid at leadership rates.
Interim
A senior executive fills a seat that is vacant, at full-time hours, until a permanent appointment is made.
Buy it when a CFO has resigned and the audit is in eight weeks. When a business is in a turnaround. When an acquisition needs integrating on a deadline. Anything where the intensity is daily and the end is defined.
Heidrick's 2026 report is a report about this instrument rather than about fractional work, which is worth knowing before its numbers are quoted in a fractional conversation. In its data, interim CFOs account for 51% of all interim leadership requests, ahead of CEOs at 13% and technology leaders at 12%.
It fails when the company uses the interim period to avoid the permanent decision, and the interim leader spends month five explaining a strategy they will not be there to run.
Consultant
A firm or an individual takes a defined question, works it, and returns a recommendation. The ownership goes back to the client on delivery.
Buy it when the question is bounded and the answer is the deliverable. A market entry study. A pricing analysis. A systems selection.
It fails when the company needed the thing done rather than the thing decided. This is the complaint behind every board that says it has a shelf of strategies and no execution, and it is usually a misdiagnosis at purchase rather than a failure of the firm.
Advisor
A senior person gives a few hours a month. A call before a board meeting, an introduction, a second opinion on a hire.
Buy it when the chief executive wants counsel and intends to keep the decision. This is a legitimate and underrated arrangement, and it is priced accordingly.
It fails when it is sold as leadership. An advisor cannot own a metric in four hours a month, and a company that expected ownership will feel short-changed by an arrangement that is doing exactly what it said.
Non-executive director
A member of the board who is not part of management, with oversight of strategy, audit and risk.
Appoint one when the company has outside shareholders, a lender who wants governance, a regulator who expects it, or a founder who needs a peer who can disagree with them in a formal setting.
It fails when the director is chosen for their name rather than for the committee they will chair, and when the duty is misunderstood. A non-executive director owes their duty to the company, not to the chief executive who invited them.
The one combination to avoid
The same person as both fractional executive and non-executive director at the same company. One oversees management, the other is management. Holding both means signing off your own work, and it is the first thing a serious investor or lender will ask about.
The question that sorts all five
What has to be owned by somebody other than the chief executive, and for how many hours a week.
If the answer is "a metric, permanently, part of the week", that is fractional. If it is "everything in this function, now, until we appoint", that is interim. If it is "an answer to one question", that is a consultant. If it is "a second opinion", that is an advisor. If it is "oversight of all of it", that is the board.
The five instruments are in the complete guide alongside what each costs, and the cases where none of them is the answer are in when fractional is the wrong answer.