Insights

Growth potential Mid-sized accounting firm with revenue in the $10M-$25M range serving business and individual clients; potential upsell opportunities with sophisticated tax planning, advisory services, and larger client onboarding for expanded audit and consulting offerings.

Regional focus Located in the greater Attleboro area with a multi-decade presence since 1972; leverage local market knowledge for cross-sell of industry-specific services to nearby small and mid-market businesses seeking trusted, long-term CPA partnerships.

Technology stack Uses cloud and analytics-related tools (AWS, Matomo, Piwik PRO, Cloudinary, Office 365) suggesting readiness for digital transformation projects, data analytics, and cybersecurity enhancements to attract clients prioritizing tech-enabled accounting.

Competitive positioning Size aligns with mid-tier firms like RSM and CLA in terms of client scope, presenting an opportunity to differentiate through specialized tax, financial planning, and niche compliance services to win mid-market clients seeking personal attention with scale.

Growth levers Broad service description and long-standing experience indicate potential to expand advisory offerings, payroll and bookkeeping outsourcing, ESG reporting, and outsourced CFO services to diversify revenue and attract growing businesses.

Similar companies to Castro, Thresher & Oliveira, PC

Castro, Thresher & Oliveira, PC Tech Stack

Castro, Thresher & Oliveira, PC uses 8 technology products and services including Matomo, Amazon Web Services, Cloudinary, and more. Explore Castro, Thresher & Oliveira, PC's tech stack below.

Castro, Thresher & Oliveira, PC's Email Address Formats

Castro, Thresher & Oliveira, PC uses at least 3 email formats:
Castro, Thresher & Oliveira, PC Email FormatsExamplePercentage
FLast@ctocpa.comJDoe@ctocpa.com
86%
Last@ctocpa.comDoe@ctocpa.com
7%
First.Last@ctocpa.comJohn.Doe@ctocpa.com
7%

Frequently Asked Questions

What is Castro, Thresher & Oliveira, PC's phone number?

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You can contact Castro, Thresher & Oliveira, PC's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is Castro, Thresher & Oliveira, PC's official website and social media links?

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Castro, Thresher & Oliveira, PC's official website is ctocpa.com and has social profiles on LinkedIn.

How much revenue does Castro, Thresher & Oliveira, PC generate?

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As of September 2026, Castro, Thresher & Oliveira, PC's annual revenue is estimated to be $10M - $25M.

What is Castro, Thresher & Oliveira, PC's SIC code and NAICS code?

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Castro, Thresher & Oliveira, PC's SIC code is 8721 - Accounting, Auditing, and Bookkeeping Services and NAICS code is 5412 - Accounting, Tax Preparation, Bookkeeping, and Payroll Services.

How many employees does Castro, Thresher & Oliveira, PC have currently?

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As of September 2026, Castro, Thresher & Oliveira, PC has approximately 11 employees across 1 continents, including North America. Key team members include Business Owner: J. B. Explore Castro, Thresher & Oliveira, PC's employee directory with LeadIQ.

What industry does Castro, Thresher & Oliveira, PC belong to?

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Castro, Thresher & Oliveira, PC operates in the Accounting industry.

What technology does Castro, Thresher & Oliveira, PC use?

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Castro, Thresher & Oliveira, PC's tech stack includes Matomo, Amazon Web Services, Cloudinary, Font Awesome, Google Maps, Office 365, PHP and Piwik PRO Core.

What is Castro, Thresher & Oliveira, PC's email format?

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Castro, Thresher & Oliveira, PC's email format typically follows the pattern of FLast@ctocpa.com. Find more Castro, Thresher & Oliveira, PC email formats with LeadIQ.

When was Castro, Thresher & Oliveira, PC founded?

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Castro, Thresher & Oliveira, PC was founded in 1971.
Castro, Thresher & Oliveira, PC logo

Castro, Thresher & Oliveira, PC

AccountingMassachusetts, United States11-50 Employees

Castro, Thresher & Oliveira, PC operates as a certified public accounting firm in the greater Attleboro area of Massachusetts. It provides a broad range of accounting, financial, and tax services to both business clients and individuals. The firm was founded in 1972 and has a long-standing tradition of delivering reliable service.

The practice is a mid-sized firm within the accounting industry, emphasizing professional and dependable client support. Its local footprint and multi-decade presence position it as a regional CPA resource for clients in the Attleboro area. The organization underscores its commitment to service quality as part of its established history.

Section iconCompany Overview

Phone number
Website
ctocpa.com
SIC Code
8721 - Accounting, Auditing, and Bookkeeping Services
NAICS Code
5412 - Accounting, Tax Preparation, Bookkeeping, and Payroll Services
Founded
1971
Employees
11-50

Section iconFunding & Financials

  • $10M - $25M

    Castro, Thresher & Oliveira, PC's revenue is estimated to be in the range of $10M - $25M

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