Strategy is rarely a full-time job at a company under $100M in revenue. It becomes one for short periods: during a transformation, an acquisition program or a major integration. That is where the interim and fractional models divide. An interim CSO leads a full-time strategic program for a defined period. A fractional CSO works one to two days a week on the ongoing strategy work.
When an interim CSO fits
Interims fit when a strategic program needs a full-time leader and has an end date. Examples: integrating a large acquisition, where two companies’ products, customers and teams must be combined within a year; a transformation that changes the business model, such as moving from project work to recurring contracts; a carve-out or a separation from a parent company; or the setup of a buy-and-build program that will make several acquisitions in quick succession. Interim strategy and transformation leaders usually work three to nine months and are priced roughly $20,000 to $40,000 a month.
When a fractional CSO fits
A fractional fits the steady cycle of strategy: an annual plan, quarterly priorities, regular reviews of whether the plan is working, board preparation, and specific initiatives such as a market entry. One to two days a week covers this at most companies between $10M and $100M. Quotes typically run $6,000 to $15,000 a month, and many engagements follow the planning calendar, heavier in the months before the annual plan and lighter afterward.
Comparing cost
Six months of an interim at $30,000 a month costs $180,000. A year of a fractional at $9,000 costs $108,000. The interim buys a full-time leader for a program that justifies one. The fractional buys strategic discipline across the year.
The private equity case
PE firms often arrive with a value creation plan, and the portfolio company needs someone to turn it into a working strategy. In buy-and-build strategies, where a platform company acquires several smaller ones, someone must run the pipeline of targets, the early conversations and the integration playbook. Larger platforms may hire an interim or a full-time corporate development leader. Smaller ones frequently use a fractional CSO alongside the fund’s own deal team, at higher hours during active acquisition periods.
The exit case
A sale is a strategy exercise of its own. The company needs an equity story: why it will keep growing, which markets it can still enter and why a buyer should pay a premium. Strategic buyers also need to be identified and understood, since they often pay more than financial buyers when the fit is right. A fractional CSO brought in 18 to 24 months before a sale can build a record of strategic choices that worked, sharpen the segments the company leads in and map the likely buyers. The investment bank runs the sale itself; the CSO’s work makes the story credible.
Choosing
Ask whether the need is a program or a practice. A program with a deadline and full-time work points to an interim. A practice that runs on the annual and quarterly calendar points to a fractional. Some companies use a fractional CSO year-round and add interim capacity for an integration.