The short answer
After closing, the finance function has roughly 100 days to establish three things: reporting the new sponsor believes, a liquidity forecast that holds week by week, and a plan that translates the value creation plan into numbers. Everything else is secondary.
The most expensive mistake in this phase is the sequence. Replace the ERP first or rebuild the chart of accounts, and you spend the window on work nobody sees – and still have no reliable monthly report in month three.
Why finance runs differently after closing
The change of ownership does not change the business. It changes who receives the numbers, and that has three concrete consequences.
The recipient changes. Before, the finance team reported to management and a house bank. Afterwards it reports to an investor with its own reporting standard, to an investment committee and often to a facility agreement with covenants.
The depth changes. The quarterly report becomes a monthly report. The year-on-year comparison becomes variance against plan – explained, not merely shown.
The deadline changes. “When the close is done” becomes a fixed working day. In practice this is the hardest shift, because it does not depend on capability but on processes that were never under time pressure before.
The numbers that were sufficient until now are not sufficient after closing. Not because they were wrong, but because they answered different questions.
Day 1 to 14: take stock
In the first two weeks nothing gets built. Things get read and counted.
- Read the facility agreement. Which covenants apply, at which test dates, on which definition? The question of which EBITDA is meant – reported, adjusted, or as defined in the contract – later decides compliance or breach, and is asked surprisingly often only in the emergency.
- Get the sponsor's reporting requirement in writing. Format, deadline, metrics, level of detail, distribution list. Verbal agreements survive until the first change in the deal team.
- Set up a thirteen-week liquidity forecast if none exists. It is the one instrument that creates certainty immediately – for both sides.
- Collect the due diligence findings log. What the buy side found in diligence is the best to-do list available in this phase. It exists already and it is already prioritised.
- Map the team and the systems. Who can do what, which system holds which truth, where the dependencies on individuals sit.
- Settle the opening balance sheet and purchase price allocation: who prepares them, by when, and how the adjustments affect current earnings.
The most common mistake here is relying on the numbers from the data room. They were prepared for a sale, not for steering.
Day 15 to 45: build reporting capability
The goal of this phase is a monthly report that arrives on a fixed date and is usable without rework. Four components are what an investor expects almost without exception:
- an EBITDA bridge from plan to actual, with variances explained,
- a cash bridge from earnings to the change in liquidity,
- the development of working capital by receivables, inventory and payables,
- the net debt position against the covenant, with a forecast to the next test date.
Two workstreams run in parallel and are regularly underestimated. The first is the written definition of every metric. Recurring revenue, order book, gross margin, retention: until these are defined once and bindingly, the investment committee will re-argue every number instead of interpreting it. The second is consolidation, as soon as more than one entity is involved – with buy-and-build strategies that is the rule, not the exception.
Day 46 to 80: turn the value creation plan into numbers
The value creation plan is a list of actions with an expected value contribution. The finance function's job is not to write it but to make it measurable: every action with a value contribution, an owner, a date and a metric that appears in the monthly report.
The rule behind that is unspectacular and holds without exception: what is in the value creation plan but does not appear in the monthly report does not happen.
Alongside comes integrated planning – profit and loss, balance sheet and cash flow linked, not three separate spreadsheets. Without that link, covenant compliance cannot be forecast, and that is the first question a sponsor asks when the business deviates from plan.
If acquisitions are planned, now is when you decide how one gets integrated: unified chart of accounts, shared closing calendar, consolidation logic. Making that decision in advance costs days. Making it retroactively, after two entities have joined, costs months. More on this under post-merger integration.
Day 81 to 100: hand over to steady state
The last phase decides whether what has been built holds. It consists of four things: a closing calendar for twelve months, documented processes for close, reporting and approvals, clear responsibilities in the team – and, if the role is handed on, a structured handover to the permanent CFO.
A set-up that only works while the person who built it is present is not a set-up.
The five gaps that almost always show up
- No integrated planning. Earnings planning yes, balance sheet and cash flow not linked.
- No reliable liquidity forecast. The bank balance is known, the next thirteen weeks are not.
- Consolidation in spreadsheets. Works with two entities, breaks at four.
- Metrics without written definitions. Every report triggers a definitional debate.
- A monthly close without a fixed date. The report arrives when it is done – and by then it is too late for decisions.
Three mistakes that cost the window
System before process. An ERP implementation in the first quarter after closing ties up exactly the capacity reporting needs. The system question is rarely the most urgent one, even though it is the most visible.
Everything at once. Reporting, planning, system change and team restructuring in parallel – at the end nothing is finished, and the first quarterly report to the sponsor is an apology.
Reporting built only for the investor. If the monthly report is built for the sponsor while management steers internally on different numbers, you get duplicated work and a second set of truths. One reporting system, two audiences – that is the standard.
When an interim CFO is the right answer
Not every portfolio company needs a new appointment after closing. Three constellations argue for it:
- The incumbent CFO leaves with the seller. Common in succession situations and carve-outs. The position is vacant, the requirement is immediate.
- The CFO stays, but the requirement is new. A colleague who ran a mid-market finance function well now faces covenant reporting, consolidation and investor communication. That is not a verdict on their ability but a question of experience that cannot be built in three months.
- The load is time-limited. The build-up is peak load; steady state afterwards is not. A permanent appointment for a temporary requirement is the more expensive option.
The practical advantage of an interim CFO in this phase lies less in availability than in repetition: someone who has done the same build several times knows the sequence and does not have to find it first.
Frequently asked questions
What does a private-equity investor expect from the finance function in the first 100 days?
Three things: a monthly report on a fixed date with an EBITDA bridge, a cash bridge and working-capital development; a rolling thirteen-week liquidity forecast; and integrated planning from which covenant compliance can be forecast. Everything else – system changes, team restructuring, process optimisation – follows after that.
What is a 100-day plan in private equity?
An action plan agreed between investor and management for the first quarter after closing. It sets out which topics are tackled immediately, who is responsible and how progress is measured. For the finance function it consists at its core of reporting capability, liquidity management and putting numbers behind the 100-day plan.
How long does it take to build PE-grade reporting?
A first usable monthly report is generally achievable in four to six weeks if the bookkeeping is in order. Reporting that runs to a fixed date without rework and includes planning realistically takes a quarter. With several entities and no existing consolidation, closer to two.
Does a portfolio company need a new CFO after closing?
Not necessarily. What matters is whether the incumbent has experience with covenant reporting, consolidation and investor communication. If not, the question is less whether to replace than whether to close the gap with temporary reinforcement while the existing leadership stays.
What does an interim CFO for a PE portfolio company cost?
The average day rate in the German interim market is around 1,317 euros across all functions according to the DDIM market study for 2026. CFO mandates with transaction and private-equity experience sit above that; the market range typically extends to about 2,500 euros.
Further reading
- Interim CFO in private equity – the five mandate types and what sponsors actually expect.
- Finance for private-equity portfolio companies – how we work and in what scope.
- Interim CFO references – twelve mandates since 2019 with brief, scope and outcome.
- Exit readiness – how to tell whether a company is ready to be sold.
- Interim management for the finance function – ready to start within 24 hours.
Sources and status
Day rate, utilisation and market volume: DDIM market study 2026 (forecast average day rate 1,317 euros, utilisation 81 percent, total market volume around 2.7 billion euros, roughly 12,500 interim managers in the German market). The remaining statements are based on nugrow's mandate practice in portfolio companies of private-equity investors. As of September 2026. This article is not legal or tax advice.
