Example Achievement Log for a Customer Success Manager

This is an example of how a Customer Success Manager tracks their year: renewals closed, churn prevented, processes built, and the messier parts of account management that actually happened. The entries here are specific enough to jog memory and defend decisions six months after they occurred.

A year in the life of a Customer Success Manager's log

Feb - task: Inherited Meridian Healthcare account from departing CSM mid-contract. 18-person org, heavy Slack integrations, $95k ARR. Spent first week on calls with their ops lead Carmen to map active use cases.
Mar - achievement: Meridian renewal pushed to signature: $95k ARR to $127k ARR after adding three new departments. Carmen told me their CFO almost rejected the renewal until I pulled usage data showing 40% increase in API calls since onboarding.
Apr - feedback: Renewal director Pauline said in Slack: 'You did what we couldn't do in two years. You made them believe they'd grow into this.' Meant more than the contract signature.
Apr - task: Built renewal forecast model in Sheets tracking every account's cohort, contract date, usage trend, and NPS. Handed to Renewal team in April; found we'd been missing 6 accounts in the Feb-Jun window.
Jun - achievement: Caught Beacon Systems churn signal: support tickets up 60% month-on-month, no escalation to me. Reached out to their former client success contact Sarah, learned their product team was understaffed post-layoff. Built them a scaled-back implementation plan, kept the account. $68k ARR retained.
Jul - achievement: Closed Westmark Education expansion deal: 850-seat license. Started in January at 340 seats. Had to navigate three budget cycles and approval from both their regional director and state compliance office. Deal closed at $203k ARR.
Jul - task: Onboarding process broke when Product shipped new data model in August. Six customers got stuck at SSO setup. Worked with Support and Product to write temporary run-book, then pushed for permanent fix in roadmap planning.
Sep - feedback: Support lead Marcus told me after the data model fiasco: 'You owned that instead of blaming us. We fixed it faster because you had clear notes.' That's how to do handoffs right.
Oct - achievement: NPS survey for Q3 cohort: 51 net. Q1 cohort was 38. Changes made: earlier executive business review, usage dashboard sent bi-weekly, three mid-sized accounts added dedicated Slack channel. Movement credited to all three.
Oct - task: Lost Cascade Media to competitor in contract year two. They'd gone through two product managers internally and felt abandoned. Honest exit call; their CTO said they wanted more 'human involvement.' Churn flag I missed in May.
Dec - achievement: Year-end: managed 24 accounts, retained 21 of them. ARR grew 34% net of Cascade loss. Forecast model reduced churn discovery lag from 45 days to 12 days average. Three expansions closed worth $421k combined new ARR.

What makes a strong entry

What most people write: Improved customer retention and NPS through better communication practices.

What went in the log: NPS survey for Q3 cohort: 51 net. Q1 cohort was 38. Changes made: earlier executive business review, usage dashboard sent bi-weekly, three mid-sized accounts added dedicated Slack channel. Movement credited to all three.

The strong version names the actual metric, the comparison cohort, the three specific changes made, and the starting point, so in review time you can defend which changes mattered and repeat what worked instead of claiming credit for unmeasurable 'communication improvements.'

What most people write: Prevented churn by catching at-risk accounts early.

What went in the log: Caught Beacon Systems churn signal: support tickets up 60% month-on-month, no escalation to me. Reached out to their former client success contact Sarah, learned their product team was understaffed post-layoff. Built them a scaled-back implementation plan, kept the account. $68k ARR retained.

The strong version shows the specific signal (ticket trend), the person contacted and why (Sarah had context), the root cause uncovered, and the outcome preserved, a replay of exactly what happened, not a claim of general vigilance.

How this becomes your review in November

I closed three major expansions worth $421k combined new ARR this year, with Westmark Education's 850-seat growth being the largest, a deal that required me to navigate three budget cycles and compliance approval across state and regional sign-off. Beyond headline numbers, I reduced churn discovery time from 45 days to 12 days by building a forecast model that the Renewal team now uses weekly, catching at-risk accounts like Beacon Systems before they escalate. My NPS improved from 38 in the early year to 51 by Q3 through three specific changes: earlier executive reviews, bi-weekly usage dashboards, and dedicated Slack channels for mid-sized accounts. One loss, Cascade Media, taught me that product instability on their side gets interpreted as abandonment if I don't stay visible, a flag I'll catch faster next time.

Starting your own log

Don't try to reconstruct a year you have already had. Start from today, one line whenever something happens, and let it build. The Perform Review Achievement Log does this for you and can capture wins straight from Slack, and how to start an achievement log covers the wider playbook.

Example Logs for Related Roles

Ready to start your own? Start your Achievement Log free, see how the Perform Review Achievement Log works, or browse performance review phrases for Customer Success Manager.