# Post-Merger Integration Planning Guide

**Category:** MA
**Author:** Simplif-i Team
**Published:** 2026-04-30
**Read Time:** 10 min read

## Summary
How to plan and execute successful post-deal integration that captures intended value.

## Full Content

# Post-Merger Integration Planning Guide

Most M&A value destruction happens after the deal closes. Here's how to plan integration that actually captures intended value.

## Start Before Close

Integration planning should begin during due diligence, not after signing. Key activities:
- Identify integration priorities
- Assess cultural compatibility
- Plan Day 1 requirements
- Establish integration governance

## The First 100 Days

### Day 1
- Communications to all stakeholders
- Leadership visibility
- Business continuity assurance

### Days 2-30
- Integration team mobilisation
- Quick wins identification
- Detailed planning refinement

### Days 31-100
- Major workstream execution
- Synergy capture initiation
- Progress tracking and adjustment

## Common Pitfalls

### Underestimating Culture
Technical integration is manageable. Cultural integration is where deals fail. Invest in understanding and bridging cultural differences.

### Over-Promising Synergies
Be realistic about synergy timelines and certainty. Build contingency into plans.

### Losing Key People
Identify critical talent early and have retention plans in place before close.

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