What is an interim controller?

An interim controller is an experienced accounting leader hired on a temporary basis, usually three to twelve months, to run a company's accounting function: month-end close, team management, accurate GAAP-consistent reporting, and internal controls. Companies hire one when the permanent controller leaves or during transitions like audits, acquisitions, and system implementations.

How long does an interim controller engagement last?

Most run three to twelve months. Vacancy-coverage engagements last as long as the permanent search; project engagements (an ERP migration, audit preparation) run the length of the project. Many end early because the company hires the interim into the permanent seat.

How much does an interim controller cost?

Market hourly rates run $150 to $300, with most engagements between $200 and $250 per hour. At the low end of that range, a full-time engagement runs roughly $26,000 a month, and heavy part-time coverage at 25 hours a week runs roughly $12,500 a month. Rates vary with experience, industry, and whether you hire independently or through a firm.

What is the difference between an interim controller and a fractional CFO?

An interim controller is temporary and accuracy-focused: they run the accounting function and make the historical record right during a vacancy or transition. A fractional CFO is ongoing and forward-looking: part-time strategic help with cash forecasting, pricing, and capital decisions. Different seats solving different problems.

Can an interim controller become our permanent controller?

Yes, and it is common. The interim period functions as an extended working evaluation, months of observed performance instead of an hour of interviews, so many companies convert the interim rather than run a search. If conversion is possible, agree on the terms (including any placement-firm fee) before the engagement starts.

Do we need an interim controller or an outsourced controller?

Depends on the seat. If a full-time controller seat exists and is empty, an interim covers it. If your company is not yet big enough to justify the full-time seat (roughly $120,000 to $200,000 fully loaded), an ongoing outsourced or fractional controller delivers the discipline at a fraction of the cost.

Advisory

Interim Controller: How to Fill an Empty Seat Without a $150,000 Mis-Hire

An interim controller is an experienced accounting leader who steps into your finance seat on a temporary basis, usually three to twelve months, to run the month-end close, manage the accounting team, and keep your reporting accurate while the permanent seat is empty or the business is in transition.

Read on Walden →