Practical guide

Your first 90 days as a new manager

The job you were promoted for is not the job you now have. A new manager can keep doing familiar individual work while the conversations and decisions of the new role wait.

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Becoming a manager is one of the few promotions where being good at the previous job actively works against you. You were promoted for shipping things yourself, and shipping things yourself is now the thing you should mostly stop doing.

The first 90 days set expectations that can be expensive to change later. This is what to do in each stretch, and the traps that are easy to fall into.

The method

Six steps, in order.

Roughly in this order, and the early ones matter most because they set expectations that are expensive to change later.

Weeks 1 to 3: ask, do not fix

Meet everyone individually and ask what is working, what is broken, and what they would change if it were their call. Write it down. Change almost nothing yet. Early changes made on incomplete information are the fastest way to spend credibility you have not earned, and the team is watching to see whether you decide before you understand.

Weeks 1 to 3: find out how you are actually judged

Ask your own manager what a good six months looks like, specifically enough that you could both agree afterwards on whether it happened. Without that answer, it is easy to optimise for the wrong thing. If the answer is vague, ask once more for a checkable example.

Weeks 3 to 6: fix the one thing everyone named

Look for an annoyance that repeated across several conversations: an unnecessary meeting, a blocking process, or an unresolved decision. Fix one that is within your authority. It shows that raising a concrete issue with you can lead to action.

Weeks 3 to 6: start real one-on-ones

Start with a regular thirty-minute meeting driven by their agenda rather than a status update. Repeated cancellations signal that the meeting is optional. Use the time to hear about problems while they are still small.

Weeks 6 to 10: give the first piece of real feedback

If you noticed a specific issue early and have been avoiding it, address it while the details are still clear. Waiting can turn a small correction into a formal judgement, and avoiding all corrective feedback can make praise feel less credible.

Weeks 10 to 13: hand over your old work properly

Name the work you are still doing that should now belong to someone else, and hand it over with context rather than instructions. Keeping every difficult task leaves less room for management and risks turning the new role into a second job.

The traps

Common mistakes in the first 90 days.

Each of these mistakes is easier to avoid than to undo.

  • Staying the best individual contributor. It feels productive and familiar. It also leaves less room for the team to grow into the work and less room in your calendar for management.
  • Trying to be the same friend you were last month. You are not, because you now decide their pay and their projects. Being warm is fine. Pretending the power difference does not exist puts the other person in an impossible position.
  • Announcing a vision in week one. Before a broad reset, the team needs to know whether you understand the existing work and will deal reasonably with current problems.
  • Passing everything down unfiltered. Repeating every piece of executive anxiety to your team is not transparency, it is offloading stress onto people who cannot act on it. Filter, then say what it means for them specifically.
  • Waiting for the review cycle to say anything critical. By then it is a formal judgement, it is too late to fix, and it is genuinely unfair to the person hearing it for the first time.

Managing former peers

Managing people who were your peers.

Being promoted over people who were recently your peers adds a power change that the advice to just be yourself does not address.

Have one direct conversation with each of them in the first fortnight and name the change out loud instead of hoping it settles: this is going to be strange for a bit, and I would rather say that than pretend otherwise. Then say what will not change and what will.

If someone tests the new authority by ignoring a small decision, address the behaviour early, privately, and without heat. State the expectation and ask what got in the way.

Try one handoff

Delegate one task with a clear finish.

Choose a low-risk task you are still doing yourself. Write the result you need, the decisions the other person can make, and the point when you will check in. Ask what support or information they need before agreeing the handoff.

For example: prepare a one-page summary of the three options by Thursday. You choose the format; check with me before contacting anyone outside the team. Let us review the outline on Tuesday. This invented example makes the outcome and boundaries visible without prescribing every step.

We build Cadence. If delegation is the part you want to work on, explore the suggested course outline below and judge whether it fits your situation. It is a starting point for a course, not a guarantee about your team's results.

Explore the Delegate Without Hovering course outline

Put it into practice

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Questions

Common questions.

What should a new manager do in the first 30 days?

Meet everyone individually, ask what is working and what is broken, and change almost nothing. Also ask your own manager what a good six months looks like, specifically enough that you would both agree afterwards on whether it happened. Early changes made before you understand the team cost credibility you have not earned yet.

Should I stop doing my old job when I become a manager?

Mostly yes, and faster than feels comfortable. Staying the person who does the tricky part feels productive, but it leaves no room for the job you were given and no room for your team to grow into the work. Hand things over with context, not instructions.

How do I manage people who used to be my peers?

Name the change out loud in a direct conversation within the first fortnight instead of hoping it settles on its own. Say what will change and what will not. If someone ignores a decision, address the behaviour early, privately, and without heat.

How often should I hold one-on-ones?

Start with a regular thirty-minute meeting driven by their agenda, not a status update you could get elsewhere. Avoid repeated cancellations, and use the time to hear about problems while they are still small.

When should I give my first critical feedback as a new manager?

Address a specific issue while the details are still clear rather than waiting for a formal review. The exact timing depends on the situation, but avoiding all corrective feedback can make both expectations and praise less credible.

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