Interim CFO Services for the Months the Finance Seat Sits Empty
A full-time finance chief in the seat within weeks, running the close, the lenders and the board until your permanent CFO starts.
Interim CFO services put a full-time, temporary chief financial officer into a vacant finance seat, usually for four to twelve months, to run the close, the audit, lenders and the board until a permanent CFO starts. KORE1 has run finance leadership searches since 2005, and 92% of KORE1 placements clear the one-year mark.
Last updated: September 14, 2026
Most CFO exits don’t come with a runway. Two weeks’ notice, sometimes less, and the calendar keeps moving. The quarter closes, payroll taxes come due, and the bank expects its compliance certificate on the date written into the credit agreement. Nobody waits.
Enter the interim CFO. The interim takes the title, runs the controller and the team, signs what the seat signs, and leaves on the day your permanent hire is ready. That’s a different purchase from a part-time fractional CFO, who adds senior judgment a day or two a week to a seat someone already sits in. KORE1 places both through its accounting and finance staffing desk, and our longer guide to picking between contract, interim and fractional covers the grey areas.
Twenty-Eight Weeks of Finance Deadlines, and Who Holds Each One
A model, not a client. The CFO of a PE-backed company resigns on Monday, September 14, with two weeks’ notice, and we get the call that same week. The dates are real. Weeks count from the resignation.
One CFO seat · resignation to permanent hire · 28 weeks
- Someone holds the title
- Lands on an empty seat
- Empty if the call waits
- Interim CFO startsWeek 4 · Oct 12
- Start if the call waits for the notice to run outWeek 7 · Nov 2
- Permanent CFO startsWeek 20 · Feb 1
- Interim’s last dayWeek 21 · Feb 12
- September quarter closeOct 1 to 9 · wk 2Empty seat
- Form 941 for Q3IRS · Oct 31 · wk 6Interim, if called in week 1
- Lender compliance certificateNov 14 · wk 8Interim
- Budget to the boardDec 10 · wk 12Interim
- Year-end closeJan 4 to 15 · wk 16Interim
- W-2 and 1099-NEC filingsIRS · Jan · wk 19Interim
- Audit fieldwork beginsMar 1 · wk 24Permanent CFO
Look where the hollow mark falls. The September close lands in the two weeks between the outgoing CFO’s last day and the interim’s first, and while a controller can run a close, nobody senior signs off on the numbers the lender and the board are about to lean on. Wait for the notice period to end before starting the search and that gap stretches to five weeks, which pulls the quarterly Form 941 into it as well. Two deadlines, not one.
Twenty weeks to a permanent start isn’t pessimistic. It’s about fourteen weeks of search with the holidays inside it, then six weeks of notice at the new CFO’s current company, which is ordinary for a sitting finance chief. Budget the interim for five months. Anything shorter is a bonus.
A Part-Time CFO Can’t Cover an Empty Chair
Fractional CFOs are good at what they do. We place plenty of them. But the model assumes somebody is already in the building every day, a controller or a VP of finance who runs the function while the fractional leader brings forecasting and board judgment on a set day or two each week.
An empty seat breaks that. Approvals pile up. The controller starts making calls that belong to someone with the title, and the bank’s questions sit until whichever day the part-time CFO is next in.
- Interim CFOThe seat is empty, or about to be. Full-time, with the title, until the permanent hire starts.
- Fractional CFOSomeone runs finance day to day, and what’s missing is senior judgment for a day or two a week.
- Permanent CFOYou know what the job needs and can wait six to twelve weeks for the right person.
Try a quick test. Write down every decision in finance last Wednesday that needed someone at the top. If the list is empty, a part-time arrangement through our fractional executive placement desk will probably cover you, and if it runs past five items, you’re staffing a full-time seat and the only question left is interim or a permanent CFO search.
What an Interim CFO Owns From the First Monday
Everything the last CFO owned, on day one. The close calendar, the controller and the team, cash and the thirteen-week forecast if there is one, the auditors, the lenders, and the chair at the board table. Titles matter here. Give the interim the CFO title for the duration, or the bank and the auditors will keep asking to speak with someone else.
Month one has an order. Week one is access and signatures, meaning bank signatory changes, the ERP, the payroll provider and whoever at the audit firm needs a new name on file. Weeks two through four bring a cash read, a close the interim actually signs, and a short written note to the CEO on what the next CFO should inherit and what ought to be fixed before they arrive.
Public companies add two obligations. The SEC gives a registrant four business days to file a Form 8-K when its principal financial officer leaves or a new one is appointed, and Exchange Act Rule 13a-14 requires the principal financial officer, or a person performing similar functions, to certify each 10-Q and 10-K. An interim can sign. Tell them before they accept.
Interim CFO Pricing Beside a Retainer and a Search
2026 ranges from our finance desk and the bands in our CFO salary guide. The interim row prices the eighteen weeks from the model above. For a band on your own permanent seat, run it through the salary benchmark assistant.
| Model | What you pay | Time in the seat | Ends when |
|---|---|---|---|
| Interim CFO | $150 to $300 an hour, or $1,200 to $2,400 a day. Eighteen weeks at $200 an hour is about $144,000 | Full-time, starting three to six weeks after the first call | The permanent CFO has started and the handover is done |
| Fractional CFO | $5,000 to $15,000 a month on retainer | A day or two a week, open-ended | You stop needing the judgment, or the seat goes full-time |
| Permanent CFO | Base from about $240,000 at mid-market private companies to well over $400,000, plus a search fee of 20% to 35% of first-year base | Full-time, after a six to twelve week search and a notice period | It doesn’t |
Interim looks expensive by the week. It is. A full year at $200 an hour runs past $400,000, more than most permanent CFOs earn in base pay, which is exactly why an interim engagement shouldn’t run a year. The fair comparison is eighteen weeks of an experienced CFO against eighteen weeks of the seat sitting empty through a quarter close, a lender certificate and a budget cycle.
Federal wage data only sets a floor. In May 2025 the Bureau of Labor Statistics recorded a $166,570 median for financial managers and $213,990 for chief executives, counting every company size and leaving out bonus, equity and benefits. Mid-market CFO packages sit far above both. Interims usually bill hourly or by the day through KORE1, the same commercial shape as our contract staffing.
When Companies Call Us for an Interim CFO
Four situations cover nearly every interim CFO search we run. Each starts differently. Russell Reynolds Associates counted 316 new CFO appointments worldwide in 2025, a seven-year high, and reported more companies leaning on interim or bridge CFOs before a permanent appointment lands.
A resignation with two weeks’ notice
The most common call, and the one where phoning in week one instead of week three matters most.
Medical or family leave
The CFO is coming back, so the interim holds the seat, keeps decisions reversible and hands everything back.
A sponsor close or a carve-out
New owners want monthly reporting done their way, often before anyone has hired the permanent finance team.
An exit in the middle of an audit
Fieldwork has a date, and the auditors need one senior person answering their requests every single day.
Need cover below the CFO line instead? Contract controllers come through our controller staffing desk, an interim VP of finance through VP of finance staffing, and accountants out on leave through backfill and leave coverage. When the pressure is audit fieldwork, contract accountants for audit season take the schedules off the interim’s desk.
Planning the Handover Before the Interim Starts
An interim engagement should end on purpose. Before day one we put three things on paper with the CEO or board, the date the permanent CFO is expected to start, a monthly check on that date, and what the interim leaves behind. The third gets skipped. Often.
The list is concrete. A close checklist someone else can run, a cash forecast with its assumptions written down, the open audit and lender items with an owner beside each, and a one-page view of the team covering who’s strong, who’s stretched and which hire should come first. Two weeks of overlap with the permanent CFO is usually enough to walk through all of it. Rarely more.
Now and then the best permanent candidate is the person already doing the job. It happens. Decide early whether they’re in the running and write the conversion terms into the agreement, much like a contract-to-hire conversion clause, while the permanent search runs through our CFO recruiters alongside the engagement.
From Resignation Letter to Handover
Only step one is urgent. People put it off anyway.
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01
Call the week the notice lands
The interim search can run beside the permanent one, but starting it after the notice period ends leaves the seat empty.
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02
Scope the seat in one call
What’s due in the next ninety days, who reports to the CFO, what the seat signs, and whether anyone inside can step up.
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03
Meet two or three interims
Each has handled your situation before, whether that’s an exit, a leave, a sponsor close or an audit.
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04
Start with the title on day one
Signatory changes, system access and introductions to the auditors and lenders all happen in the first week.
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05
Hand over, then leave or convert
Two weeks of overlap with the permanent CFO, a written handover, and either a clean exit or a conversion agreed at the start.
Common Questions
How much does an interim CFO cost?
$150 to $300 an hour is the usual range in 2026, or $1,200 to $2,400 a day. Because the role is full-time, an eighteen-week engagement at $200 an hour comes to about $144,000. Transaction work and public-company reporting price toward the top of the band.
What’s the difference between an interim CFO and a fractional CFO?
Hours, and whether the seat is empty. An interim CFO works full-time in a vacant seat until a permanent hire starts, while a fractional CFO works a day or two a week, usually beside a controller or VP of finance who already runs the function.
How fast can an interim CFO start?
Usually three to six weeks after the first call. Interim candidates are signing up for full-time work, so most have something to wrap up first, which is why the search should begin the week a resignation arrives rather than when the notice period ends.
How long do interim CFO engagements last?
Four to twelve months covers most of them. They end when the permanent CFO starts, and since a CFO search plus the new hire’s notice period often takes five months, engagements tend to run longer than companies first plan.
Can an interim CFO sign SEC certifications for a public company?
Yes. Exchange Act Rule 13a-14 calls for certifications from the principal financial officer or a person performing similar functions, so an interim appointed to the role signs the 10-Q and 10-K certifications. The appointment itself also requires a Form 8-K.
Can we hire the interim CFO permanently?
It’s a good outcome when it fits, so plan for it rather than stumbling into it. Agree at the start whether the interim can be considered for the permanent seat, and put the conversion terms in the agreement before the first day.
When is an interim CFO the wrong call?
When the seat isn’t really empty. If a capable controller or VP of finance is running the function and what’s missing is forecasting or fundraising experience, a fractional CFO costs less and fits better.
Send Us the Deadlines Your Last CFO Left Behind
Send the list of what’s due and who reports to the seat. We’ll tell you whether it needs an interim, a fractional CFO or a straight permanent search.
Start an Interim CFO Search →