How to Onboard a New Agency Client
The first 90 days predict whether a client renews. Get it right and they're a 3-year retainer. Get it wrong and they churn at month 4.
Here's the week-by-week playbook.
Week 1: Welcome + access
Day 1: Send the welcome packet
- Welcome email from agency lead
- Onboarding doc (PDF or Notion)
- Slack/Teams channel invitation
- Calendly link for kickoff call (within 5 business days)
Day 2-3: Collect access
- Brand assets (logos, fonts, brand guidelines)
- Tool access (CMS, ad accounts, analytics)
- Past performance data (last 6-12 months)
Day 4-5: Kickoff call
- Re-confirm goals from the proposal
- Introduce your team
- Walk through 90-day plan
- Set the communication SLA
Week 2: Discovery + audit
- Deep-dive on their existing efforts
- Audit of current state (depending on service: SEO audit, ad-account audit, brand audit)
- Stakeholder interviews (3-5 internal people)
- Competitive analysis
Deliverable: Discovery findings doc + 30-60-90 plan
Weeks 3-4: First deliverables
Ship something concrete in week 3 or 4 — even if it's small. Early wins matter.
Examples:
- SEO: First content piece live + technical-fix list submitted
- Paid: First campaign live with $X spent
- Content: First 2 articles published
- Web: Discovery → wireframes → design direction approved
Weeks 5-8: Build cadence
Weekly rhythm:
- Monday: Status update (async, written)
- Wednesday: Standup call (30 min, optional in-flight weeks)
- Friday: Deliverable shipped
Monthly rhythm:
- Last business day: monthly report sent
- First Tuesday of month: monthly review call (60 min)
Weeks 9-12: Stabilize + plan renewal
By week 9 you should have:
- Clear ROI signal (impressions, leads, traffic, whatever your metric is)
- 3-4 internal champions on the client side
- A "look back" doc showing what we did vs what we said we'd do
Week 12: schedule the renewal conversation. Don't wait for them to bring it up.
The 5 rituals that retain clients
1. Weekly written status update
Every Monday. Bullet points. What we shipped, what's next, blockers.
Even if it's "nothing changed since Friday's update." The act of writing it builds trust.
2. Monthly report (1-pager max)
- Top 3 wins
- Top 3 metrics (with context)
- Top 3 things planned next month
- 1 ask of them
3. Quarterly QBR
60-90 min. Strategic, not tactical. Where are we vs goals? What changes?
4. The "What's keeping you up at night" question
Ask the client champion this every quarter. Their answer tells you what to focus on next.
5. Surprise wins
Once a quarter, deliver something they didn't ask for. A landing page they need. A research summary. An intro to someone helpful.
This is the most under-used retention lever in agencies.
What NOT to do in the first 90 days
❌ Don't oversell early wins. Be conservative. "We're tracking ahead of plan" beats "We've crushed it."
❌ Don't let the first deliverable slip. Ship on time even if it's smaller than ideal.
❌ Don't over-communicate via Slack. Keep big stuff in scheduled calls + monthly reports.
❌ Don't introduce new team members suddenly. Always pre-warn the client when staffing changes.
The renewal conversation script
At week 12, send:
"Hi [name], coming up on 3 months together — wanted to flag that the renewal conversation is coming up in about 6 weeks. Want to schedule 60 min for a 'look back, look forward' review? I'll bring [results doc + Q2 plan]."
90% of clients renew if you've done weeks 1-12 well.
Use AgencyPitch lifecycle emails — they auto-fire welcome, day-7 check-in, and renewal-prompt emails so you don't drop the ball.