The New Manager Checklist: What to Do in Your First 90 Days

A clear new manager checklist can turn an overwhelming transition into a manageable one. The first 90 days of management involve a lot of firsts, your first 1:1s, your first feedback conversation, your first team decision, and having a structured checklist helps ensure nothing critical falls through the cracks while you’re still finding your footing. Here’s what to prioritize, broken down by phase.

In This Article

• Before You Start: Setting Expectations

• Week One Checklist

• First Month Checklist

• Days 30 to 60: Building Momentum

• Days 60 to 90: Establishing Your Rhythm

• Mistakes This Checklist Helps You Avoid

• Beyond the Checklist

Before You Start: Setting Expectations

Before you’re fully in the role, get clarity from your own manager on what success looks like in your first 90 days. Ask directly: what would make you confident this transition is going well? Vague answers like “just do a good job” aren’t useful. Push for something concrete, whether that’s specific team outcomes, stakeholder relationships to build, or particular skills to demonstrate.

It’s also worth reviewing anything available about the team you’re inheriting: recent performance context, any known challenges, and the history of how the team has been led before you. This isn’t about forming firm conclusions before you start, just building enough context to ask better questions once you do. For the fuller narrative version of this same window, see first-time manager: a 30-60-90 day guide.

Week One Checklist

• ☐ Schedule individual 1:1s with every direct report

• ☐ Ask each person: what’s working well, what’s frustrating, what do you want a new manager to know

• ☐ Meet with your own manager to confirm expectations and priorities

• ☐ Identify key stakeholders outside your direct team and set up brief intro conversations

• ☐ Review any current projects, deadlines, or commitments you’re now responsible for

• ☐ Resist making any process or team changes this week, focus entirely on learning

The goal in week one is pure information-gathering. Any temptation to demonstrate quick wins should be set aside in favor of genuinely understanding the team and context you’ve inherited.

First Month Checklist

• ☐ Establish a consistent 1:1 cadence with each direct report

• ☐ Set clear expectations with your team about how you like to communicate and be updated

• ☐ Identify one or two early opportunities to build trust, small, visible ways to support your team

• ☐ Begin noticing (without acting yet) any patterns, gaps, or opportunities you observe

• ☐ Ask your manager for a first checkpoint conversation on how the transition is going

• ☐ Start building relationships with peer managers whose teams intersect with yours

By the end of month one, you should have a foundational understanding of your team, your stakeholders, and your own manager’s expectations, enough to start making informed decisions rather than just observing.

Days 30 to 60: Building Momentum

• ☐ Begin making small, considered changes based on what you’ve learned, not sweeping changes, but targeted improvements

• ☐ Deliver your first pieces of real feedback, both positive and constructive

• ☐ Check in explicitly with your team on how the transition feels from their side

• ☐ Set concrete goals with your team for the next quarter

• ☐ Identify any skill gaps of your own, delegation, feedback, difficult conversations, and seek out support

This phase is where you start shifting from purely learning to actively leading, but changes should still be grounded in the context you built in your first 30 days, not made in isolation.

Days 60 to 90: Establishing Your Rhythm

• ☐ Solidify your management rhythm: 1:1 cadence, team meetings, how you track and communicate priorities

• ☐ Have a formal check-in with your own manager on your 90-day progress

• ☐ Reflect on what’s working well in your management approach and what needs adjustment

• ☐ Begin thinking beyond immediate team execution toward slightly longer-term priorities

• ☐ Ask your team directly for feedback on your management style so far

By day 90, you should have moved from “the new manager still learning the ropes” to someone with an established, if still evolving, management rhythm and real credibility with your team.

Mistakes This Checklist Helps You Avoid

Following a structured checklist helps new managers avoid some of the most common first-90-days mistakes: making changes before understanding the context, avoiding difficult conversations because they feel uncomfortable, neglecting to set clear expectations early (which makes later feedback conversations harder), and failing to check in with your own manager regularly enough to catch misalignment early.

Beyond the Checklist

A checklist provides structure, but the real work of becoming a good manager happens in how you handle the specific, unpredictable situations that don’t fit neatly into a checklist, a difficult conversation you didn’t anticipate, a conflict between team members, a decision with no clear right answer.

Having support for those in-the-moment situations matters just as much as following the checklist itself. Blomma’s AI career coaching gives new managers a place to think through the real, specific challenges that come up during this transition, complementing a structured checklist with the flexible, real-time support that the unpredictable parts of management actually require.