Engagement letters signed by January 31
A clear seasonal milestone that shows whether onboarding is ahead of the work.
Accounting and CPA firms · Client onboarding automation
Have every engagement letter signed before the first W-2 arrives
Each December and January, CPA firms rebuild the same onboarding machine. Engagement letters go out for every returning client, new clients need portal invitations, organizers and prior-year returns, and someone tracks who has signed in a spreadsheet. When that runs late, preparers start February with half their clients unsigned and missing basic documents.
How it often works today
- An admin builds engagement letters in Word or the tax package for hundreds of returning clients, and tracks signatures in a spreadsheet that falls behind by mid-January.
- New clients receive a generic welcome email, then several separate requests for prior returns, ID, bank details and entity documents over the following weeks.
- Organizers come back incomplete or not at all, and preparers discover missing items only when they open the file in March.
- Scope is unclear for clients who added a rental property, a new entity or a state filing, so extra work is done without an updated fee.
Onboarding automation runs the sequence from your practice management system: the right letter for each service, e-signature and payment authorization, portal setup, a tailored document request list and reminders until each step is done. Admin staff watch a single status board instead of a spreadsheet, and partners only see the clients who need a personal nudge.
The improved workflow
Segment clients by service and fee
Each client is tagged by engagement type, such as 1040 only, 1040 with Schedule C, business return, CAS or advisory, so the correct letter and request list are generated.
Send letters for e-signature in batches
Karbon, Canopy or TaxDome sends engagement letters with fee terms and payment authorization. Automatic reminders go out at set intervals until each letter is signed.
Ask scope questions up front
A short questionnaire asks about life and business changes, such as a home sale, new entity or move to another state, so partners can adjust scope and fee before work starts.
Open the portal with a tailored request list
Clients get one portal invitation with a checklist based on last year's documents, so they upload what is needed rather than guessing.
Hand off a ready file
When the letter is signed and key documents are in, the job moves to the preparer queue automatically, with outstanding items still visible.
How we deliver this: AI automation for small business or fractional CTO leadership, scoped in writing and run over 90 days. See pricing or the sample scope.
What we would measure
Days from signed letter to ready-to-prepare
Captures how long document collection takes after the client commits.
Scope changes caught before work starts
Tells you whether the questionnaire is preventing unbilled scope creep.
Where people stay in control
- A partner approves engagement letter templates and fee terms, and any client-specific scope change is reviewed by the engagement partner before sending.
- Clients upload sensitive documents only through a secure portal with multi-factor authentication, never by plain email attachment.
- Consent forms required under Section 7216 for any use or disclosure of tax return information are reviewed by the firm and kept with the client record.
Example
Illustrative: 600 returning individual clients
For example, a firm with about 600 returning individual clients sends engagement letters in two batches in early December, each with a short changes questionnaire. Forty clients report a new rental or business, and the partner adjusts their fees before signing. By late January most letters are signed, and returning clients see a portal checklist based on last year's documents. This is illustrative, not a measured result.
Tools typically involved
What the first 30 days look like
In the first 30 days, ideally between May and September, we would review last season's engagement and onboarding data, map the current steps and timing, gather your letter templates and pick one client segment to pilot. You would leave with a baseline and a build plan.
Common questions
Which practice management tool is best for onboarding?
Karbon, Canopy and TaxDome each handle engagement letters, portals and client requests differently, and the best fit depends on your service mix, size and tax software. We would usually configure the tool you already own first, and only recommend a switch if the gap is significant and the timing works.
What about clients who never use the portal?
Every firm has them. The workflow should include a fallback, such as a staff call or a secure upload link, after a set number of reminders. Tracking who uses the portal also tells you whether the problem is the clients or the instructions.
Can we use this for business and CAS clients too?
Yes, with separate templates. Business onboarding usually needs entity documents, payroll provider access, bank feed connections and accounting software permissions. Building it as its own sequence, with its own owner, keeps individual tax onboarding simple and stops business clients waiting behind 1040s.
The business case
Does it pay for itself?
Illustrative defaults for an accounting firm. Replace them with your numbers.
What this workflow costs today
a month in staff time, before any lost sales
Monthly fee + assumed tools +
Break-even: new clients a month (at first-year value)
Or: staff hours recovered and redeployed
Break-even additional revenue
Value of +1 point of win rate
First 90 days, service fee
Worth a closer lookTest the assumptions
Illustration only, not a forecast or guarantee. Recovered staff time becomes a cash saving only if spending actually declines or the time goes into paid work. Tool costs are an assumption; we replace every number here with yours before recommending a scope.
Client onboarding automation in other industries
Consulting and professional services firmsEvent and catering companiesFinancial advisory firmsLaw firmsMarketing agenciesTax preparation offices
Client onboarding automation: full guide
Related guides
How to scope an automation projectAcceptance criteria for automation projectsZapier for small businessHow to automate client onboarding, step by step
Terms used here
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