Offshore staffing specifically built for CPA firm Client Accounting Services (CAS) practices. Dedicated bookkeepers, accountants, and controllers delivering under your firm brand for your CAS clients. For CPA firms growing CAS revenue without proportional US hiring.
Client Accounting Services (CAS, sometimes called CAAS for Client Accounting & Advisory Services) has grown from approximately 8% of mid-market CPA firm revenue in 2015 to 20–30% in 2026. The growth is real and durable: businesses that used to hire in-house bookkeepers increasingly outsource the entire finance function to their CPA firm.
The operational challenge: CAS economics depend on being able to deliver recurring work efficiently. US-only CAS practices hit a hiring wall quickly – finding, hiring, and retaining US bookkeepers and accountants at the rate CAS growth requires is genuinely difficult. Most CPA firms growing CAS successfully past $1M annual revenue are using offshore staff to deliver the volume.
A typical offshore-enabled CAS practice has:
Routine work flows offshore: transaction coding, reconciliation, AP/AR processing, standard close entries, financial statement preparation. US team reviews outputs, handles client communication, makes judgment calls, signs off on deliverables. Client sees a unified firm experience – they work with your US team primarily and may or may not know offshore staff contribute to delivery (depending on your disclosure approach).
The specific math that makes offshore CAS staffing compelling for CPA firms:
A US senior bookkeeper's loaded cost (salary + benefits + payroll tax + equipment) runs $70k–$95k annually. At fully-utilized 1,600 billable hours annually, that's $44–$60/hour loaded cost. CAS services bill at $95–$165/hour typically. Realization: 1.7x to 3.0x.
A US CAS manager loaded cost $110k–$150k, billing at $145–$250, realization 1.5x–2.2x.
These numbers are tight. Any inefficiency (rework, long onboarding, staff turnover) compresses realization below breakeven.
An offshore senior bookkeeper at $2,600–$3,200/month delivers 160 productive hours monthly, or $16–$20/hour loaded cost. Same $95–$165/hour billing rate. Realization: 4.8x–10x.
The differential (realization jumping from 1.7x–3.0x to 4.8x–10x) is what funds: (1) additional US manager capacity, (2) higher CAS partner compensation, (3) pricing competitiveness against non-CPA outsourced alternatives, (4) reinvestment in technology and process.
| CAS practice size | Typical offshore staff needed | US staff needed |
|---|---|---|
| Small ($250k annual CAS revenue) | 1–2 offshore bookkeepers | 1 US CAS manager |
| Mid-small ($750k) | 3–5 offshore bookkeepers + 1 offshore accountant | 1 CAS manager + 1 CAS senior |
| Mid-size ($2M) | 8–15 offshore staff (mixed seniority) | 2–3 CAS managers, 2 seniors, 1 partner/principal |
| Large ($5M+) | 20–50 offshore staff with offshore team leads | 5–10 US CAS team, dedicated CAS partner |
Three common approaches to disclosing offshore CAS work to end clients:
For full compliance templates see compliance forms hub. For CPA firm-specific guidance see CPA firm guide.
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