The deal is done, the champagne’s been poured… and then comes the part that really matters.

From what we’ve seen, those first 100 days after a merger are where the tone is set, for better or for worse. It’s the window where confidence is either built or shaken, and where value is either unlocked or slowly eroded.

A focused, human-centred action plan makes all the difference. Here are the five priorities we believe matter most in those early days:

1️⃣ 𝐂𝐮𝐥𝐭𝐮𝐫𝐞 𝐟𝐢𝐫𝐬𝐭.

Shared values, behaviours and leadership styles don’t “just happen.” The work starts long before Day 1, and continues every day after.

2️⃣ 𝐑𝐞𝐚𝐬𝐬𝐮𝐫𝐞 𝐲𝐨𝐮𝐫 𝐜𝐥𝐢𝐞𝐧𝐭𝐬.

Clear, steady communication builds trust. Clients want to know nothing important is changing except your ability to serve them even better.

3️⃣ 𝐇𝐨𝐥𝐝 𝐨𝐧 𝐭𝐨 𝐲𝐨𝐮𝐫 𝐭𝐚𝐥𝐞𝐧𝐭.

Your best people are your biggest asset. Identify them early, support them, and make sure they feel part of the future.

4️⃣ 𝐀𝐥𝐢𝐠𝐧 𝐡𝐨𝐰 𝐲𝐨𝐮 𝐨𝐩𝐞𝐫𝐚𝐭𝐞.

Systems, processes, reporting; they all need attention. Momentum only lasts if the organisation can actually run at the speed of the strategy.

5️⃣ 𝐁𝐫𝐢𝐧𝐠 𝐜𝐥𝐚𝐫𝐢𝐭𝐲 𝐭𝐨 𝐭𝐡𝐞 𝐯𝐢𝐬𝐢𝐨𝐧.

Everyone should understand why the merger happened and the direction you’re heading together.

The first 100 days won’t fix everything, they’re not meant to.

But they do shape the trajectory: trust, culture, pace, belief.

Get them right, and you build on solid ground.

Get them wrong, and you risk months, even years, trying to rebuild what slipped away.

In the marketing communications sector, many successful agencies are built on their founders’ vision, energy, and relationships. That’s what drives growth, culture, and client trust.

But here’s the challenge: if the future of the business relies too heavily on one individual (or a small group), it’s not just the leader who carries the risk. It’s the entire enterprise.

✅ 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐰𝐚𝐧𝐭 𝐜𝐨𝐧𝐭𝐢𝐧𝐮𝐢𝐭𝐲. They need reassurance that their trusted team will still be there tomorrow.
✅ 𝐓𝐚𝐥𝐞𝐧𝐭 𝐰𝐚𝐧𝐭𝐬 𝐩𝐫𝐨𝐠𝐫𝐞𝐬𝐬𝐢𝐨𝐧. High performers are motivated when they see a clear pathway to leadership.
✅ 𝐁𝐮𝐲𝐞𝐫𝐬 𝐰𝐚𝐧𝐭 𝐜𝐨𝐧𝐟𝐢𝐝𝐞𝐧𝐜𝐞. In M&A, a business without a succession plan will always be valued lower, or worse, seen as too risky to touch.

Succession isn’t just about preparing for the founder’s exit. It’s about creating resilience, protecting value, and ensuring the agency’s legacy extends beyond any one person.

That’s why succession planning is never an optional extra when we work with ambitious founders; it’s a non-negotiable step in safeguarding long-term value.

Have you stress-tested your succession plan? If not, the best time to start is today.