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A 30-60-90 day plan for a new customer success manager

By Draft First. Updated October 2026

The first three months in a new CSM role decide how the next year goes. Move too fast and you make promises before you understand the accounts. Move too slow and a renewal slips while you're still reading. This plan balances both.

Days 1 to 30: listen and map

• Build a one-line view of every account: ARR, renewal date, health, last touch, open tickets, known risks.
• List every renewal in the next 90 days. These come first.
• Meet your top 10 accounts. Ask why they bought and what success looks like now.
• Meet sales, support and product counterparts. Ask what goes wrong between teams.
• Learn how the health score is calculated, and whether people trust it.

Book snapshot, day 20
Accounts: 42 | ARR: $3.1M | Renewals in 90 days: 6
Red: 3 (Halden, Marlow, Finch) | Unknown health: 7 (no touch in 90+ days)
Biggest surprise: 2 renewals with no exec contact on record

Days 31 to 60: prioritize and build

• Make a plan for each Red account and each renewal in the next 90 days.
• Write your first two plays: new executive at an account, and health score drop. Use the playbook template.
• Run your first QBR, using the QBR template.
• Set up a weekly routine: risk review Monday, workload check Wednesday, update to your manager Friday.

Days 61 to 90: show results

• Close the renewals that were due, or escalate early with a clear brief.
• Bring every account to known health. No more unknowns.
• Write account plans for your top 15.
• Share a short 90 day review with your manager: what you found, what you changed, what you need.

Your 90 day review, in five bullets

Renewals: 5 of 6 signed, 1 extended 30 days with plan
Health: 0 unknown (was 7); Red down from 3 to 1
Built: 2 plays, weekly risk review running
Learned: handoffs miss promises, fixed with a handoff template
Ask: exec sponsor program for top 10 accounts

Using AI as a new CSM

The first 30 days are mostly reading. An agent can summarize each account's ticket history, notes and emails into a one-page brief, so you walk into first meetings prepared. Check every brief against the source for the first few accounts. See ticket summary prompts and ChatGPT prompts for CSMs.

Questions

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

Map every account, list renewals in the next 90 days, meet top accounts and learn how health is measured.

When should a new CSM run their first QBR?

Usually in the second month, once you understand the account.

What should a 90 day review include?

Renewal results, health changes, what you built, what you learned and what you need.