The 100-Day M&A Integration Playbook
How acquirers actually capture the synergies they modeled — without breaking the asset they just bought.
70% of acquisitions destroy value. The reason is rarely the deal — it's the integration. This playbook is the field-tested SAZ approach to acquiring a business and capturing the modeled synergies in 100 days, while preserving the customer base, team, and operating cadence that made the asset worth buying.
01 — Day -30: The pre-close 30
Most integration teams start on day 0. By then it's too late. Start on day -30 with: integration team formation (yours + theirs), data room re-review focused on operating model, change-management read-out, and Day 1 communication plan. Day 1 is performance — and performance requires rehearsal.
02 — Day 1: Communication is the product
On Day 1, every employee, customer, and vendor of the acquired company will form their lasting impression of the deal. Pre-script every touchpoint: the all-hands deck, the customer email, the vendor letter, the press release, the social. Get the CEO of the acquired entity in the room. The first 8 hours set the tone for the next 8 quarters.
03 — Days 1–14: Stabilize before you integrate
Resist the urge to integrate anything in the first two weeks. Stabilize: payroll runs, customers get supported, vendors get paid, leadership team meets daily, key talent is locked in. Premature integration in this window breaks more value than late integration ever does.
04 — Days 15–60: Wave 1 integration
Wave 1 captures the easiest, lowest-risk synergies: shared tooling, consolidated vendors, payroll/HRIS unification, shared back-office. Avoid: pricing changes, customer migration, sales territory rebalancing. The goal of Wave 1 is operational stability + early cost capture.
05 — Days 61–100: Wave 2 integration
Wave 2 captures the harder synergies: revenue synergies (cross-sell, bundled offers), GTM consolidation, product roadmap alignment. By day 100, both businesses should be running on a unified operating cadence with shared scorecards.
06 — Day 100+: The sustaining model
After Day 100, the deal is no longer "an integration" — it's the company. The leadership team, scorecards, and cadence need to be running the combined business as one. Tracking back to the deal thesis ends here; operating the company starts.
- Start integration at day -30, not day 0
- Day 1 communication is rehearsal-grade
- Stabilize before you integrate — always
- Two waves, not one — sequence matters
- Day 100 means you stop measuring against the deal
Run the M&A Integration with the SAZ team.
Email info@Sedighi.ca or call (604) 632-4959. Senior partner response within one business day.