CTO has gone green! We are drawing our power needs from solar energy.

Accounting is art with numbers Accounting solutions and advice is our medium

What we do

Individual Services

Protecting your personal assets has never been more important. Our accounting services safeguard you and your family and optimize all your hard-earned dollars

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Business Client Services

Are you running your business at peak performance? Call on us to increase efficiency, stay in compliance, and boost revenue and profits.

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Small Business Consulting

Don't pay more in taxes than you have to! Take full advantage of all deductions and credits with our tax planning, compliance, and preparation services.

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Life's better when people understand your needs

Service-based Businesses

We make outgoing payments on time and seamlessly manage your cash flow.


Sound financial insight helps build a better business.

Family Businesses

Keep the business in the family, but hand the accounting over to us.


We’ll construct a plan to help lead you toward financial success.

Continuing charitable efforts within our community

Castro, Thresher & Oliver CPAs logo

In celebration of our 50th year in business, Castro, Thresher & Oliveira, PC has established a charitable fund with a goal of giving back to the community.

In addition to the establishment of the charitable fund the firm and it's employees will continue giving back to the community through individual and collective volunteer efforts throughout this year.

man with glasses wearing sport coat sitting on bench smiling and looking at mobile phone


5 steps to managing your financial life on mobile

Download the eBook about 5 steps to managing your financial life on mobile