Expert Accounting & Bookkeeping Services Across Maine

Serving Businesses & Individuals in Brunswick, Portland, Augusta, & South Portland


In the diverse and dynamic landscape of Maine, every business and individual faces a unique set of financial opportunities and challenges. From the coastal entrepreneurial spirit of Brunswick to the bustling urban environment of Portland, the commercial energy of South Portland, and the governmental hub of Augusta, the need for reliable, strategic, and locally-informed financial guidance is universal. Many business owners find themselves overwhelmed by the intricacies of tax compliance, the demands of precise bookkeeping, the complexities of payroll, and the critical need for actionable financial insights to drive growth.


At Clarkson and Clarkson INC., we bridge this gap by providing professional, transparent, and personalized accounting, bookkeeping, tax preparation, payroll, and advisory services across Maine. While our roots and primary office are firmly established in Brunswick, we are deeply committed to serving businesses and individuals throughout our key service areas, including Portland, South Portland, Augusta, and indeed, the entire state of Maine. Our mission is to transform your financial challenges into opportunities, empowering you with clarity, confidence, and the strategic support needed to succeed in your unique local market.

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Professional team members at Clarkson and Clarkson INC. ready to assist clients by phone and email

Our Core Service Areas: Local Expertise, Broad Reach


Our commitment to serving Maine businesses is reflected in our dedicated focus on understanding the distinct financial ecosystems of our primary service areas. We combine our deep local knowledge with extensive accounting expertise to provide solutions that are not just accurate, but genuinely relevant to your specific location.

Brunswick is more than just our office location; it's our community. As a vibrant coastal town with a rich history and a growing business scene, Brunswick offers a unique blend of small-town charm and entrepreneurial spirit. From family-owned businesses to startups, retail shops, and professional service providers, Brunswick's diverse economy demands attentive and precise financial support.


  • Community Immersion: Being based in Brunswick, we are intimately familiar with the local economy, municipal regulations that might impact businesses, and the nuances of operating within this tight-knit community. This allows us to offer highly localized and practical advice.
  • Accessible Support: For our Brunswick clients, in-person consultations are easily arranged, providing direct, face-to-face opportunities to discuss your financial needs and build a strong, personal relationship with your accounting team.
  • Tailored for Local Businesses: We specialize in helping Brunswick businesses navigate the daily demands of bookkeeping, optimize their local tax strategies, and manage payroll efficiently, ensuring they remain compliant and financially robust.

As Maine's largest city and economic engine, Portland boasts a diverse and fast-paced business environment. From innovative tech startups and booming hospitality venues to established retail and healthcare institutions, Portland's entrepreneurial spirit demands dynamic and sophisticated financial guidance.


  • Understanding Portland's Dynamics: We recognize the specific challenges and opportunities inherent in operating in a major metropolitan area, including higher operational costs, diverse labor markets, and competitive landscapes.
  • Industry-Specific Expertise: Our team possesses experience working with a wide range of Portland's key industries, including restaurants, craft breweries, retail, technology, and professional services, allowing us to offer specialized advice on industry benchmarks, tax implications, and operational efficiencies.
  • Scalable Solutions for Growth: Whether you're a burgeoning startup or an established enterprise in Portland, our services are designed to scale with your growth, providing robust bookkeeping, tax, and advisory support that adapts to your evolving needs.

Adjacent to Portland, South Portland is a significant commercial and industrial hub, home to major retail centers, logistical operations, manufacturing facilities, and a diverse array of businesses. Its distinct economic profile requires specific accounting and financial strategies.


  • Focus on Commercial Operations: We understand the unique financial reporting and tax considerations for larger retail establishments, manufacturing operations, and businesses with significant inventory and supply chain dynamics typical of South Portland.
  • Compliance with Local Regulations: We ensure South Portland businesses adhere to all relevant local and state regulations, from property taxes to sales tax complexities for large-scale commerce.
  • Optimizing Efficiency: Our management accounting and advisory services help South Portland businesses streamline their operations, control costs, and enhance profitability in competitive sectors.

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As Maine's state capital, Augusta hosts a unique blend of government entities, professional service firms, and local businesses that cater to a distinct population. Businesses in Augusta often deal with specific regulatory environments and a different pace of commerce.


  • Public Sector & Professional Service Focus: We offer tailored accounting solutions for businesses that interact with government contracts, as well as the needs of law firms, medical practices, and other professional services prevalent in Augusta.
  • Regulatory Compliance Expertise: We are well-versed in navigating state-level regulatory requirements and compliance standards that may uniquely impact businesses operating within the capital city.
  • Stable & Reliable Support: Our services provide consistent, reliable financial management and tax preparation, offering peace of mind to Augusta businesses focused on stability and long-term planning.

Serving the Greater Maine Region with Virtual and On-Site Services

While Brunswick, Portland, South Portland, and Augusta are our core focus areas, our commitment to Maine extends statewide. We leverage secure, cutting-edge virtual accounting technologies and communication platforms to seamlessly serve clients in remote towns and regions across the entire state. Whether you're in Bangor, Lewiston, Waterville, or anywhere else in Maine, Clarkson and Clarkson INC. offers flexible solutions to meet your financial needs without the need for frequent travel. Our virtual capabilities mean that expert financial guidance is always within reach, no matter where your business is located.

Our Comprehensive Services for Your Maine Business


No matter which of our service areas you call home, Clarkson and Clarkson INC. offers a full suite of professional accounting and financial services designed to support your growth, ensure compliance, and provide strategic insights.


  • Strategic Accounting & Bookkeeping: We transform your financial data from raw numbers into actionable intelligence. Our services include meticulous transaction recording, bank reconciliations, and the preparation of accurate financial statements (Profit & Loss, Balance Sheet, Cash Flow). We ensure your books are clean, organized, and provide the clarity you need to make informed decisions for your business in any Maine market.
  • Precision Tax Preparation & Planning: Navigating the complexities of federal and Maine state tax laws can be daunting. Our accountants specialize in comprehensive tax preparation for individuals and businesses across Maine, maximizing deductions and credits while ensuring full compliance. We also offer proactive tax planning to strategically minimize your tax liability throughout the year.
  • Efficient Payroll & QuickBooks Support: Payroll management is critical for employee satisfaction and compliance. We provide full-service payroll solutions, handling everything from wage calculation and direct deposit to payroll tax filings. As certified QuickBooks ProAdvisors, we offer expert setup, training, and ongoing support to ensure your financial software is optimized for your Maine business operations, whether you're in Brunswick or Portland.
  • Proactive Advisory & Business Consulting: Beyond traditional accounting, we offer strategic management accounting and advisory services. This includes budgeting, forecasting, financial analysis, entity selection, growth strategy, and even outsourced CFO services. We become your trusted financial advisor, offering forward-looking guidance to help your business thrive and adapt to market changes across all regions of Maine.
  • Sales Tax & GAAP Compliance: For businesses selling goods or services, particularly those with multi-state operations or significant e-commerce presence, sales tax compliance is paramount. We help determine sales tax nexus (including Maine’s economic nexus rules), handle registrations, ensure accurate collection, and manage timely filings. We also ensure your financial statements adhere to Generally Accepted Accounting Principles (GAAP), crucial for securing financing, attracting investors, and preparing for audits.

Why Choose Clarkson and Clarkson INC. as Your Maine Accountant?


Choosing the right financial partner is a decision that impacts your business's future. Clarkson and Clarkson INC. stands as a premier choice for businesses and individuals throughout Brunswick, Portland, Augusta, and South Portland, due to our unwavering commitment to excellence and client success:


  • Unmatched Local Expertise: We live, work, and operate within Maine. Our deep understanding of Maine’s specific tax laws, compliance requirements, local economic nuances, and business environment sets us apart, allowing us to provide highly relevant and effective solutions wherever you are in the state.
  • Personalized, Direct Access to Expertise: You gain direct access to our senior accountants and QuickBooks ProAdvisor. This means no call centers, no runarounds—just personalized, prompt, and knowledgeable support from a dedicated professional who genuinely understands your business.
  • Transparent, Flat-Fee Pricing: We believe in absolute financial clarity. Our services are offered through clear, flat-fee packages tailored to your specific needs, providing predictable pricing with no hidden costs or surprise bills. This fosters open communication and long-term trust.
  • Audit-Ready Accuracy & Peace of Mind: Our meticulous processes ensure that your financial records are consistently organized, accurate, and fully compliant. This commitment to audit-ready financials reduces your stress during tax season, simplifies financial reviews, and provides crucial peace of mind.
  • Dedicated Community Commitment: We are proud members of the Maine business community. Our success is tied to the success of our clients and neighbors, and we actively support local events and initiatives throughout Brunswick, Portland, and beyond.
  • Holistic Financial Partnership: As a division of Clarkson Corporation, we offer integrated financial solutions. Our accounting services seamlessly connect with other potential financial needs, creating a comprehensive partnership that ensures efficiency and consistency across all your financial operations.

Client Testimonials from Across Maine


Don't just take our word for it. Hear from businesses and individuals in your area who have experienced the Clarkson and Clarkson INC. difference:

5 star reviews

"Clarkson and Clarkson INC. has been an invaluable partner for our growing tech company in Portland. Their expertise in QuickBooks and strategic tax planning has saved us countless hours and ensured we're always compliant."

Joseph Kell

8 months ago

5 star review

"As a small business owner in Brunswick, I appreciate the personalized attention and transparent pricing. They truly understand our local needs and has made our bookkeeping so much easier."

Jane Faber

6 months ago

5 star review for tax services

"Navigating the complexities of sales tax in South Portland was a headache until we found Clarkson and Clarkson INC. Their detailed guidance and efficient filing have been a game-changer for our manufacturing business."

Chris Williams

3 months ago

5 star review for quickbooks

"For our non-profit in Augusta, accurate financial reporting is crucial for funding and accountability. Clarkson and Clarkson INC. provides consistent, audit-ready statements and invaluable advisory support that helps us fulfill our mission."

Kelly Murano

2 months ago