Practical guide

Your first 90 days as a new manager

The job you were promoted for is not the job you now have. Most new managers spend three months doing their old job well and their new job badly, because the old job is the one that still feels productive.

A management course, ten minutes a day

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 are expensive to change later. This is what to do in each stretch, and the specific traps that catch nearly everyone.

The method

Six steps, in order.

Each step removes one decision from the daily version, so the thing you do every day is as small as possible.

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. Most new managers never ask, then optimise for the wrong thing for two quarters. If the answer is vague, push once more.

Weeks 3 to 6: fix the one thing everyone named

There is usually a single obvious annoyance that came up in most of your conversations. A meeting nobody needs, a process that blocks people, a decision nobody will make. Fix that one first. It is proof that talking to you produces results, which is what makes people tell you the harder things later.

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

Weekly, thirty minutes, their agenda not yours, and do not cancel them. Cancelling a one-on-one because you are busy tells the person exactly where they rank. These meetings are where you find out about problems while they are still small, which is most of the actual job.

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

There is something you noticed in week two and have been avoiding. Say it now. Every week you wait makes it a bigger conversation, and a manager who has never given corrective feedback has taught the team that praise from them means nothing.

Weeks 10 to 13: hand over your old work properly

Name the things you are still doing that belong to someone else, and give them away with context rather than instructions. If you are still the person who does the tricky part, you have not become a manager, you have added a second job to your first one and you will burn out on schedule.

The traps

What new managers reliably get wrong.

These are common enough to be predictable, and each one is easier to avoid than to undo.

  • Staying the best individual contributor. It feels productive and it is the thing you know you are good at. It also means nobody on your team gets to grow into the work, and your calendar has no room for the job you were actually given.
  • 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. Nobody wants your vision yet. They want to know whether you are going to be reasonable, and whether their existing problems will be dealt with.
  • 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

The case nobody prepares you for.

Being promoted over people who were your peers last week is the hardest version of this, and the standard advice to just be yourself is useless.

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.

Expect one person to test whether the authority is real, usually by ignoring something small. Address it early, privately, and without heat. Letting it slide once is how a team learns that your decisions are optional.

Where we fit

How Cadence covers this.

Cadence is ours. Judge it on the detail, not on our word.

Cadence has reviewed courses for the transition into management and for the one-on-ones that carry most of the job, both built as short daily lessons. The daily shape fits a new manager's calendar, which is the constraint that stops most people reading the management book they bought.

If your situation has a specific complication, and managing former peers or inheriting a team mid-crisis both qualify, you can describe it and get a course built around that instead.

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. Expect one person to test whether your authority is real, and address it early, privately, and without heat.

How often should I hold one-on-ones?

Weekly, around thirty minutes, driven by their agenda, not a status update you could get elsewhere. The important rule is not cancelling them, because cancelling tells the person exactly where they rank, and these meetings are where you hear about problems while they are still small.

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

Within the first two months, on something you genuinely noticed early. Waiting makes the conversation bigger and turns a small correction into a formal judgement. A manager who has never said anything critical has also made their praise worthless.

Last reviewed

Sources reviewed

Official pages, checked 7 August 2026.

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