Post-acquisition integration in France: 100-day plan to secure cash, teams, margins

Updated 28 April 2026.

The first 100 days after a French SME acquisition concentrate most of the value creation — or destruction. The buyer discovers the operational reality of the target: monthly close quality, reporting reliability, real cash position, supplier dependencies, key staff to retain. The seller has usually prepared the deal — they have polished the company. The gap between data room and ground reality is almost always under-estimated.

This 100-day plan addresses French SME buyers (revenue €2–30M) who have closed their LBO and start their tenure. It is split into 10 ten-day blocks (D0-D100), each with priorities, deliverables and risks to control.

To secure the first 100 days of a French SME acquisition: (1) lock down cash from D0-D10 (payments, bank lines, real working capital), (2) activate French tax consolidation within deadlines (CGI art. 223 A), (3) meet top-20 customers and top-10 suppliers before D50, (4) stabilise key staff through individual reviews D0-D30, (5) produce a first in-house monthly close at D60 integrating DD adjustments. Without this discipline, synergies promised at credit committee evaporate and year-1 DSCR slips.

Top priority: cash. From D0, the buyer (or their CFO) must reclaim:

• Bank signatures (powers updated before D3).
• Inventory of bank accounts open, dormant, legacy.
• Status of credit lines: receivables financing, overdraft, mobilisations. Confirm renewal with each bank within the first week.
• Next payroll calendar and 3-month coverage.
• Payment commitments for the next 30 days (suppliers, tax, social).

Common mistake: letting the system run on autopilot. In reality, a strategic supplier may block a delivery for lack of updated signatures; a bank may freeze a wire pending power verification.

D0-D10 deliverables#

• 13-week cash flow forecast (gross, weekly).
• Bank authorisations and signatures inventory.
• Payment commitment list to D+30.
• Letter to top-5 banks: new manager, unchanged accounts, contacts.

Watchpoint. Verify that the price escrow (if stipulated in reps & warranties / GAP) has been actually set up at the notary — a contractual obligation whose oversight triggers immediate dispute.

Key staff#

In a French SME, 3 to 8 people actually drive performance. Identify them D11-D20 and run one-to-one interviews with each:

• Their perception of the deal, fears, expectations.
• Their understanding of their new perimeter.
• Any external offers they may have.

Employment contracts transfer by operation of law (French Labour Code art. L.1224-1): no signing formality, conditions maintained. But motivation remains fragile. A key departure at D45 can destroy 20% of value.

Accounting#

• Retrieve chart of accounts, accounting policies, options.
• Reconcile the closing reference statement with carried-forward accounting.
• Onboard the buyer's expert-comptable (or keep the seller's for 6 months for continuity).
• Secure access to SaaS tools: ERP, payroll, CRM, banking, e-signature.

Key contracts#

• List change-of-control clauses.
• Notify counterparties within contractual deadlines.
• Verify commercial lease: change of beneficiary, condition report.

Top-20 customers#

The buyer must be physically (or video) in contact with the top-20 customers before D50. Goals:

• Confirm relationship stability.
• Detect any anticipated order drop (sometimes hidden by the seller).
• Formally announce continuity, terms maintained, no immediate change.

On top-20, target 50% physical visits over the period. The other 50% via video.

Top-10 suppliers#

Same logic: confirm payment terms, lead times, outstanding balances, ongoing negotiations. A supplier may exploit the change to tighten terms.

Real margins#

Build gross margin by client / product / contract on the last 12 months, from accounting and CRM. The picture often differs from DD presentation:

• A "profitable" key account may show negative net margin after correct cost allocation.
• A flagship product may be eroding over the last 6 months.

This analysis feeds the strategic trade-offs of D71-D100.

Monthly reporting#

Set up standard monthly reporting by D60:

• Monthly P&L vs budget and prior year.
• 13-week rolling cash flow, refreshed weekly.
• Sales KPIs: pipeline, bookings, conversion rate, churn.
• HR indicators: headcount, absenteeism, open hires.

Goal: a robust in-house close by D70, independent from seller tools.

French tax consolidation#

The election for tax consolidation (CGI art. 223 A) must be formally notified to the French tax authority before the legal deadline following the start of the first consolidated fiscal year. On a standard LBO, this election is essential to offset holding interest expense against target profits. Do not skip or postpone.

Compliance#

• 2026 e-invoicing: reception capability by 1 September 2026 (mandatory for all French companies). Audit the target.
• Monthly DSN payroll filing: continuity, check of the past 6 months.
• CSRD / VSME depending on size: extra-financial obligations in motion.
• GDPR: processing register up to date, sub-processors identified.

Findings synthesis#

By D70, the buyer has solid operational visibility:

• Bridge between DD-presented EBITDA and reconciled real EBITDA.
• Real cash vs LBO forecast.
• Margins by segment, ground truth.
• Expectations of teams, suppliers, customers.

This synthesis feeds three structuring trade-offs:

Trade-off 1 — 18-month action plan. Which priorities (sales, digital, organisation, HR, IT)? Which investments? Which hires?

Trade-off 2 — Synergies. If the deal is part of a build-up, plan real synergies (purchasing, support functions, sales) with a realistic calendar. Quick wins to be executed by M+12.

Trade-off 3 — LBO communication. Prepare the first covenant report to the bank: projected DSCR, leverage, alert or not on plan deviations.

18-month plan#

A short document (8–15 pages) shared with key staff, co-investors, and presented to the bank in a 6-month update. The plan formalises:

• 3 to 5 strategic priorities.
• Budget M+1 to M+18, base and stressed scenario.
• Investment and hiring plan.
• Monthly tracking indicators.

On the deals we advise, LBOs that hit year-1 plan share three characteristics: (a) a buyer physically present full-time on site for the first 60 days, (b) a CFO (in-house or outsourced) onboarded from D0, (c) a clear mandate to the expert-comptable to produce the first in-house close by D60, free from legacy tools. LBOs that drift share the opposite: remote buyer, accounting still run by the legacy firm without scope, reporting cobbled in spreadsheets.

The most under-rated risk is silent working capital deterioration in the first 60 days. Team panic effects, slower customer collections, accelerated payments to anxious suppliers: WC can swell 5–15% in 8 weeks, consuming cash and stressing LBO liquidity. Weekly WC tracking is mandatory over the period.

1. Full-time on-site presence for the first 60 days.
2. CFO mandate from D0 (in-house or outsourced).
3. Tax consolidation calendar activated immediately.
4. Key-staff retention plan: reviews, contract amendments, retention bonus.
5. First covenant report prepared by D100 maximum.

• E-invoicing: immediate compliance audit.
• CSRD / VSME: depending on size, anticipate extra-financial data collection.
• Interest limitation (ATAD): model from the first consolidated fiscal year.
• Cybersecurity: immediate access and backup audit.