Use This For Every New Client
Your Complete Onboarding System
A smooth onboarding process is where trust either compounds or cracks. This checklist ensures every new client — regardless of business type — gets the same professional, organized experience from Day 1. Work through each phase in order. Reset for every new client.
Phase 1 — Immediately After Contract Signed
Same day the agreement is signed
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Send a warm welcome email confirming the signed agreement
Include: excitement to work together, what happens next, and a link to schedule the onboarding call within the next 3-5 business days.
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Create the client's folder in your file system
Set up a dedicated folder (Google Drive, Dropbox) with subfolders: Financial Statements, Bank Statements, Contracts, Tax Documents, Correspondence.
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Set up the client in your practice management / invoicing system
Add their business details, billing information, and service start date so invoicing runs smoothly from month one.
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Send the Onboarding Questionnaire
Business structure, EIN/Tax ID, accounting software in use, bank/credit card accounts, prior bookkeeper info (if any), and key business contacts.
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Schedule the Onboarding Call within 3-5 business days
Use a scheduling link (Calendly) or propose 2-3 specific time options directly. The sooner this happens, the more momentum carries forward.
Phase 2 — Access & System Setup
Complete during or right after the onboarding call
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Get added as Accountant/User on QuickBooks Online or Xero
Request Accountant-level access specifically — this gives you the tools needed (like the Accountant Toolbox) without giving you owner-level billing control.
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Connect or confirm bank feed connections
Ensure all business bank accounts and credit cards are properly linked and feeding transactions into the accounting software.
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Request read-only access to relevant platforms
Depending on business type: Shopify/Amazon Seller Central, Stripe/PayPal, payroll platform (Gusto/ADP), or property management software.
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Collect prior year financials (if available)
Last year's P&L, Balance Sheet, and tax return help establish opening balances and historical context.
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Confirm business structure and tax classification
Sole Prop, LLC, S-Corp, Partnership — this affects how you categorize owner draws, distributions, and payroll.
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Set up secure password sharing if needed
Use a password manager (1Password, LastPass) for any credentials that must be shared directly rather than via user invitations.
Phase 3 — Books Assessment & Clean-Up
First 1-2 weeks of the engagement
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Review the existing Chart of Accounts
Identify duplicate, vague, or misused accounts. Note what needs restructuring for clean, useful reporting.
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Check reconciliation status of all bank and credit card accounts
Identify how far behind reconciliation is and flag any accounts that have never been reconciled.
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Scan for miscategorized or uncategorized transactions
Look for anything sitting in "Uncategorized Expense" or "Ask My Accountant" — these directly distort financial reports.
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Identify any personal expenses mixed into business accounts
Common issue, especially with solopreneurs. Flag for correction and discuss with the client tactfully — no judgment, just clarity.
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Draft the clean-up plan and estimated timeline
Document what needs fixing and roughly how long it will take. Share this with the client so they know what to expect.
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Send the Initial Assessment Summary to the client
A short, non-judgmental summary: current state of the books, what will be cleaned up, and by when. This builds immediate confidence.
Phase 4 — Systems & Communication Setup
Establish the ongoing rhythm of the relationship
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Confirm preferred communication channel and response expectations
Email, Slack, WhatsApp, or a client portal — agree on the primary channel and set expectations for response time (e.g., within 24 hours).
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Set the monthly reporting delivery date
Confirm reports arrive by the 5th business day of each month (or whatever was agreed in the contract) — and put it on your own calendar as a recurring task.
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Set up recurring invoicing for the agreed billing cycle
Automate this wherever possible so payment collection never becomes a manual, awkward task.
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Share your document request process
Explain how and when you'll request missing receipts or clarification on transactions — and how the client should send them back to you.
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Add key dates to your own calendar
Monthly close deadlines, quarterly review calls, and tax season prep dates specific to this client.
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Introduce yourself to the client's CPA or tax preparer (if separate)
A brief, professional email establishing the working relationship makes tax season significantly smoother for everyone.
Phase 5 — First Month Delivery & Confidence Building
Prove the value immediately
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Deliver the first clean monthly report on time
This is the single most important trust-building moment of the entire relationship. Never let the first report be late.
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Include a short walkthrough note with the first report
Highlight 1-2 specific insights or observations — this shows you're actively thinking about their business, not just processing data.
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Ask directly: "Is this report clear and useful for you?"
Invite feedback early. Small formatting or clarity adjustments now prevent bigger dissatisfaction later.
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Confirm all access, systems, and communication are working smoothly
A brief check-in: "Has everything on your end been working well so far?" catches friction points before they become frustrations.
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Add the client to your recurring check-in schedule
Quarterly business reviews, satisfaction check-ins, and eventual referral requests — set the long-term relationship rhythm from day one.