How accounting firms use Claude across multiple client books.
Connect the QuickBooks Online and Xero companies your firm is authorised to manage, keep each client inside a clear boundary, and review proposed accounting work before it reaches a ledger.
Claude can support a portfolio. It should not become a shared client folder.
A firm can use Claude with several QuickBooks Online and Xero client books through Numbers Game. The point is not to give one broad chat access to everything. The point is to give the right person and approved AI client access to the right company, for a defined accounting job.
Use one project per unrelated client. Keep related entities together only when the work genuinely requires comparison, consolidation, or intercompany review. That boundary protects confidentiality and makes the resulting work easier to explain, review, and revoke.
Set the client boundary before the first prompt.
- 1. Connect only authorised companies. An Owner or Admin connects the QuickBooks Online and Xero companies the firm is entitled to manage.
- 2. Scope the user and AI client. Give each person access to the client companies they need. Keep read-only work read-only where appropriate.
- 3. Load firm-owned instructions. Use the firm’s close sequence, materiality rules, client conventions, and reference files as the operating context for the work.
- 4. Ask for evidence, not a conclusion. Start with the transactions, reports, exceptions, and supporting schedule behind a question.
- 5. Keep human review before a ledger write. Claude can prepare a categorisation, journal entry, reconciliation item, or reporting draft. An accountant decides whether the treatment is right and approves the change.
Work in the client’s Claude organisation. Keep the client in control.
A client can invite its fractional CFO or accountant into its client-owned Claude organisation, then grant that professional access to the client’s approved Numbers Game connection. The adviser works in the client’s Claude environment with the QuickBooks Online or Xero companies the client has authorised, rather than exporting reports or asking the client to relay every question.
A fractional CFO serving several clients can be a member of several client-owned Claude organisations and use Numbers Game in each one. That is not a pooled workspace. The professional enters the relevant client’s Claude organisation, uses that client’s approved company scope, and keeps the work inside that client’s project and instructions.
The client retains control of its Claude membership, projects, and access removal. Numbers Game adds the accounting boundary: the client can limit the adviser to the relevant companies, keep other books read-only or unavailable, and require human review before approved accounting data reaches the ledger.
Repeat the accounting work. Keep the judgment local.
Close review
Prepare uncategorized activity, unusual movements, missing support, and review questions for each approved client.
Client reporting
Pull the checked financial detail behind an AR, cash, margin, or expense narrative before the firm writes to the client.
Portfolio oversight
Compare selected measures across related entities or an approved client portfolio without assembling a new export for every question.
Reconciliation preparation
Organise the items that need a receipt, explanation, bank match, or accountant decision before reconciliation is finalised.
Transition work
Audit inherited books, document unresolved balances, and prepare a controlled handover plan without granting a new team unrestricted access.
Recurring firm routines
Use the same approved prompt and review standard across client projects, then let the responsible accountant handle the exceptions.
A multi-client workflow needs more than a careful prompt.
Prompt wording is useful, but it is not an access control. A firm needs company scope, user roles, a record of tool activity, and an offboarding path when a person or client relationship changes.
Numbers Game keeps the accounting platform as the system of record. Claude retrieves approved live context and prepares work inside the boundary the firm set. The firm reviews the proposed accounting treatment before it is sent to QuickBooks Online or Xero.
Claude for multi-client accounting firms, answered directly.
Build the workflow around controls and evidence.
Roles and access controls
See what Owners, Admins, Members, and Viewers can reach.
Run your firm’s month-end close in Claude
Apply the client boundary to a practical close sequence.
Where client QuickBooks data lives
Understand the data path, storage boundary, and revocation work.
Bring one client workflow. Keep every client boundary.
See how Numbers Game scopes Claude to approved QBO and Xero books while preserving professional review.