5 Biggest Onboarding Mistakes Agencies Make (And How to Fix Them)

February 15, 2026
Trevor Anderson
9 min read
5 Biggest Onboarding Mistakes Agencies Make (And How to Fix Them)

5 Biggest Onboarding Mistakes Agencies Make (And How to Fix Them)

After talking to 100+ agencies, we've identified the most common onboarding mistakes. Here they are, and how to fix them.

Mistake 1: Asking for Client Passwords

The problem: You send your client a form asking for their account credentials. They're worried it's a phishing email. Even if they trust you, they hate sharing passwords.

Why it matters: 40% of clients never respond to password requests. Of those who do, half worry about security.

The fix: Use OAuth 2.0. With OneClick Onboard, clients authorize you with one click. No passwords ever shared.

Implementation: - Switch to OneClick Onboard ($39-199/month) - Send clients an onboarding link - They authorize in 30 seconds - You have instant access

Result: Significantly higher completion rate. Faster onboarding. Better security.

Mistake 2: Onboarding Clients to the Wrong Account Level

The problem: You create an account for the client at the wrong level (campaign, ad account, or MCC level). This limits what you can do or creates permissions issues later.

The account structure of Google Ads and Meta looks like this:

Google Ads: MCC > Account > Campaign > Ad Group Meta: Business > Ad Account > Campaign

If you onboard them as a campaign manager, you can't run sitewide optimizations. If you onboard them as an account owner, they might see other clients' data.

Why it matters: Wrong account level = limited functionality or security issues.

The fix: 1. Understand account hierarchy before onboarding 2. Create a standard checklist (are they an MCC owner? Ad account owner? Campaign manager?) 3. Onboard consistently 4. Document the structure for each client

Pro tip: Most agencies should onboard to the ad account level (not MCC, not campaign).

Mistake 3: No Documented Process

The problem: Your onboarding process depends on whoever's doing it that day. Sarah does it one way. Mike does it another. Nobody has a checklist.

This leads to: - Skipped steps - Forgotten follow-ups - Clients falling through the cracks - Inconsistent experience

Why it matters: Inconsistent onboarding = inconsistent results = higher churn.

The fix: 1. Write down your exact onboarding process (5-10 steps) 2. Create a checklist 3. Make it public to your team 4. Measure how long each step takes 5. Optimize the bottlenecks

Here's a sample checklist: - [ ] Confirm client details in CRM - [ ] Send onboarding link via email - [ ] Verify client authorized within 24 hours - [ ] Add client to billing system - [ ] Brief client on campaign strategy (15 min call) - [ ] Launch first campaigns - [ ] Send welcome email with next steps - [ ] Schedule 30-day check-in

Result: Predictable, consistent experience. Faster onboarding. Better client outcomes.

Mistake 4: Not Setting Expectations Upfront

The problem: You don't tell the client what to expect during onboarding. They think it takes 5 minutes. It takes 2 weeks. They get frustrated.

Why it matters: Unmet expectations kill relationships before they start.

The fix: Create an onboarding guide that explains: 1. What you'll need from them (usually nothing if using OAuth) 2. How long it will take (be realistic) 3. What they'll receive (access, dashboard access, reporting, etc.) 4. When it will be ready (same day, next day, etc.) 5. What happens next (kickoff call, first campaigns launch, etc.)

Pro tip: Underpromise and overdeliver. Tell them it takes 2 days. Deliver in 1 day. They'll be delighted.

Result: Alignment. No surprise disappointments. Better client satisfaction.

Mistake 5: Not Automating Reminders and Follow-ups

The problem: You send a client an onboarding link. They're busy. They forget. You have to send a manual follow-up. Then another. Then another.

This wastes your team's time and damages the client experience ("Why do I keep getting emails?").

Why it matters: Manual follow-ups are inefficient and unprofessional.

The fix: Use an automation tool (or OneClick Onboard's auto-reminder feature) that: 1. Sends the initial onboarding link 2. Automatically reminds them 24 hours later if they haven't clicked 3. Sends another reminder 48 hours later 4. Alerts you if they still haven't completed it

This eliminates manual follow-ups and improves completion rates by 35%.

Bonus: The Wrong Tool

The problem: You're using a tool that wasn't designed for agencies. Maybe you're using a manual form. Maybe you're using a CRM that doesn't integrate with Meta/Google.

Why it matters: The wrong tool makes even a good process feel slow.

The fix: Use a tool built for agency onboarding. OneClick Onboard: - Integrates with Meta, Google, TikTok - Handles OAuth securely - Automates reminders - Provides client progress tracking - Works with white label (on Pro+) - Costs less than a contractor

Quick Fix: An Onboarding SOP

Here's a quick template to get started:

  1. Pre-onboarding: Confirm client details, prep paperwork
  2. Send link: Email the onboarding link + explanation
  3. Monitor: Check that they authorized within 24 hours
  4. Confirm access: Log in and verify you have account access
  5. Kickoff: Schedule a call to discuss strategy and next steps
  6. Launch: Create first campaigns and get them approved
  7. Handoff: Provide client with dashboard access and training
  8. Check-in: Touch base after 30 days to review results

Time estimate per client: 2-3 hours (mostly strategic, not admin).

Using OneClick Onboard cuts this to 45 minutes for the access part.

Next Steps

Rate your current process against these 5 mistakes:

  • Are you asking for passwords? (Bad)
  • Do you have a documented process? (Good)
  • Do you automate reminders? (Good)
  • Do you use the right tools? (Critical)

If you're failing on any of these, fix them. Start with the tool. Everything else gets easier.

Try OneClick Onboard free to fix the biggest bottleneck.

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