Duplicated client workflows limit client accounting services (CAS) capacity before sales demand does. Every new client brings another bank login and another close checklist. Small variations that don't match the last client pile up by mid-month while the sales pipeline keeps filling.
If your firm keeps adding clients, standardize the tools, close calendar, bank access, scope, and pricing before each exception becomes another private checklist. A shared client file lets another team member pick up the work without waiting for the usual owner.
What do client accounting services (CAS) cover?
CAS covers recurring finance work your firm runs for the client every month. Unlike a tax engagement that ends when your firm files the return, CAS keeps going because your firm operates part of the client's finance function continuously.
CAS often starts with transaction work such as bookkeeping and the monthly close. AP/AR coordination usually joins the scope once the client wants your firm to manage the flow of bills and invoices alongside the ledger. From there, your firm may add financial reporting, cash flow oversight, budgets, forecasts, and chief financial officer (CFO)-level guidance on the decisions clean books make possible.
Who is CAS for?
CAS engagements typically fit businesses in these situations:
Growing small and mid-sized businesses that have outgrown pure bookkeeping but don't need or can't justify a full-time controller or CFO.
Owner-led businesses where the owner wants to hand off the finance function instead of running it personally.
Professional service firms with predictable monthly reporting needs.
Clients needing board-ready reporting or covenant tracking without in-house finance staff.
CAS demand is rising faster than many firm processes can handle. The CPA.com and American Institute of Certified Public Accountants (AICPA) PCPS 2024 CAS Benchmark Survey report described CAS as the fastest-growing service area in public accounting, with participating practices reporting 17% median growth for 2023. As CAS demand grows, duplicated work can block the roster.
How to standardize CAS operations across clients
A CAS practice adds clients without adding proportional headcount when each engagement runs on the same workflow, tools, bank access, work routing, delegated access, pricing structure, and annual scope review.
Standardize the workflow before adding clients
Standardized CAS workflows make recurring client work something the whole team can share. During close week, anyone on your team should be able to find the bank feed, checklist, and missing-document request without asking the client owner. When every client runs on different software with different close rhythms, each engagement depends on the one person who knows its quirks.
CAS setups that support more clients define a few shared pieces:
One general ledger platform: The accounting system where the client's transactions, chart of accounts, and reports live stays familiar from client to client.
One monthly close checklist: The close doesn't get rebuilt from memory.
One document collection process: Your team cuts down on the chase across email threads, portals, and texts.
One banking layer: Client bank accounts, feeds, and access rules follow documented defaults, so troubleshooting varies less bank by bank.
One client communication channel: Requests land in the task queue instead of scattering.
Once your team documents these pieces across the roster, close work becomes easier to assign, review, and back up. For banking, Relay's account setup keeps client account structures and permissions familiar from one engagement to the next.
Choose a tool set your team can repeat
A repeatable tool set matters because reviewers need to recognize the work quickly. The goal is a system your team can run without relearning the basics for every client.
Pick one primary tool per category and apply it across the roster:
Category | Common options |
|---|---|
General ledger | QuickBooks Online, Xero |
Task queue and review notes | Karbon, Financial Cents, Keeper |
Banking and AP | Relay, Bill.com, Ramp |
Payroll | Gusto |
Reporting and forecasts | Fathom, LiveFlow, Jirav |
Documents and engagement letters | Liscio, SmartVault, Ignition |
The exact combination varies, but the operating rule should be clear: pick one primary tool per category, apply it across the roster, and document exceptions before the first close. If the exception lives only in one person's head, it will resurface at the worst time.
Standardize bank access during intake
Bank access belongs in intake so the first close starts with the right accounts, feeds, permissions, and approval path already in place. Set the account structure, transaction feed, owner approval workflow, and permission rules before the client signs the engagement letter.
When clients bank on a defined setup, reconciliation changes less from client to client. The same feed pattern shows up in every ledger, and the same permission model tells staff what they can view or approve. If the engagement needs separate accounts for operating cash, tax, payroll, or AP, document the structure during intake.
On Relay, auto-transfer rules can move a set percentage or dollar amount from each incoming deposit into those accounts, so the split runs on its own once the structure is in place. You may also require clients to adopt your systems and decline prospects who won't, because a nonstandard client can consume the time and margin expected from several standard ones.
Route work as one roster-wide queue
A roster-wide queue gives every recurring task a single owner and a standing due date. Tuesday's close and the missing statement request sit in one visible list instead of living in separate inboxes.
To build the queue, turn recurring work into scheduled tasks:
Inventory every recurring deliverable across the roster: closes, payroll coordination, filings, and report packages.
Turn each deliverable into a task template with a standing due date, so nothing depends on memory.
Stagger close schedules so not every client closes in one week.
Assign owners based on current capacity across the team.
Review blocked items daily so your team can clear them while there is still time to adjust ownership or request missing documents.
Staggering and capacity-based ownership do the most work here. Spreading close dates across the month levels the load, supported by a shared calendar for multi-client workflow management. Capacity-based ownership also means you can reassign the roster when someone is out sick instead of waiting for the usual client owner to return.
Use delegated bank access instead of shared client logins
Your staff need individual, role-based delegated access to client bank accounts, with permissions matched to their job. For reconciliation, view-only access lets your team pull transactions and confirm balances without payment authority. For payment runs, have one team member prepare payments and another review or release them. Keep final approval with the client or a firm principal, so no single person can move money alone.
Shared logins fail in predictable ways. The password changes without notice. The two-factor code goes to the client's phone while the close waits. Someone hands a staff member the owner's full access as a workaround, which creates a control problem in place of the convenience problem it was meant to solve.
Across every client, a banking platform can give each team member an individual login. Relay's Partner Portal gives your firm one surface for the client accounts you've been granted access to, so your team doesn't have to share credentials or text the client for a code on close day. Write the access tiers into the engagement letter so the client knows exactly what your firm can see and do.
Price CAS work by scope tier
Flat monthly CAS pricing works best when each fee maps to a defined scope tier. When a client adds weekly AP support and cash flow reporting, the work moves tiers instead of becoming unpaid work.
CAS services usually cost a recurring monthly fee tied to service depth, client complexity, transaction volume, and how much advisory work your firm owns. The transactional tier covers the close and day-to-day bookkeeping. When work shifts into controller territory, the fee should include reporting and cash oversight. Advisory pricing belongs to budgets, forecasts, CFO-level guidance, and board-ready reporting.
Tier-based pricing lets your firm keep the benefit of process efficiency instead of turning every saved hour into lower billings. Each tier needs named deliverables and exclusions, so scope creep becomes a pricing conversation instead of unpaid work.
Review CAS engagement scope annually
Annual scope reviews keep CAS engagements aligned as clients grow. Build the review into every contract and price transaction growth into the next contract term.
To run the annual scope review:
Pull twelve months of time entries or task logs for the client.
Compare actual work against the engagement letter and note anything recurring that wasn't in the original scope.
Quantify the difference in hours. Recurring extras might include weekly AP runs, extra sales-tax filings, additional entities, and board-package prep.
Decide where the extra work lands:
If it will continue, move the client to a higher tier or add the new work as a named line item at a specific fee.
If it shouldn't stay with your firm, return the out-of-scope work to the client.
Run the review in the same month every year so it stays calendared on a predictable schedule.
Build a CAS roster you can keep serving
A CAS roster is durable when a backup preparer can step in without reconstructing the client from memory. Before expanding the roster, audit one active client file that way. If a backup preparer can't find the next task, source documents, open questions, bank setup, and approval path within a few minutes, the file has a capacity problem tied to process visibility.
To have that structure in place before the next engagement starts, opening a Relay account gives LLC and corporation clients up to 20 checking accounts (50 on the Scale plan) and delegated staff access. Those two pieces let another preparer understand the client cash setup without waiting for the original owner.
Frequently asked questions
What is the difference between client accounting services and bookkeeping?
Bookkeeping handles the records; CAS manages an ongoing piece of the client's finance function. A CAS engagement can start with categorizing transactions and closing the month, then extend into reporting, cash flow planning, and advisory work once the books are reliable.
What services are typically included in a CAS engagement?
Most CAS engagements include bookkeeping, month-end close work, payroll coordination, and financial statements. AP/AR coordination is a common addition, typically priced as a named line item once a client wants that level of support. Higher tiers add cash flow oversight, budgeting, and CFO-level guidance.
How do CAS firms take on more clients without hiring at the same rate?
Your firm does it by making each client setup follow the same tool set and access rules, with tasks assigned from shared templates. A shared roster view lets your firm see work across clients, then shift owners or close dates before deadlines pile up.
How do CAS firms usually charge?
CAS firms usually charge a recurring monthly amount based on the work included in the engagement. The fee rises as the scope moves from transaction work to controller-level reporting and advisory support. Firms often revisit scope and price annually as workload changes.
What kind of access should a CAS firm have to a client's bank accounts?
A CAS firm should have individual, role-based credentials for the work it performs. Reconciliation work usually needs view-only access, while payment work should separate preparation from approval. Shared logins create security and continuity problems, so access levels should be documented in the engagement letter.
