Accounting & Bookkeeping Services in Portland, Brunswick, and Augusta, Maine


Professional, Transparent, and Local Access to CPA Services for Maine Businesses and Individuals

Call Us (207)-955-0554
svg shape

Your Trusted Maine Accounting Firm


Welcome to Clarkson and Clarkson INC., your dedicated accounting and bookkeeping partner serving Brunswick, Portland, South Portland, Augusta, and the greater Maine region. As a specialized division of The Clarkson Corporation, we combine the resources of a multi-service financial group with the personalized attention only a local firm can offer.


Whether you’re a small business owner, entrepreneur, or individual seeking peace of mind at tax time, our team is here to help you achieve clarity, compliance, and confidence in your finances. From QuickBooks setup to complex tax preparation, we deliver the expertise and responsive service you deserve.

Portland Maine CPA firm team at work

Annual October “Catch-Up” Accounting Service

Behind on your bookkeeping? You’re not alone. Our unique October “Catch-Up” service is designed for busy business owners and individuals who need to get their books in order before the end of the year. In one focused annual sprint, we’ll transform your records from a source of anxiety into organized, audit-ready financials—just in time for tax season. Due to the HIGH DEMAND FOR THIS SERVICE, you will need to sign up prior to August 1st of each year.


Let us help you start fresh, so you can move forward with confidence.

Sign Up Now!
QuickBooks setup for small business in Maine

Are your books a source of stress? Let us turn them into a strategic asset. As Certified QuickBooks ProAdvisors, we offer:

  • QuickBooks Onboarding: Customized setup so your software works for your unique business.
  • QuickBooks Clean-Up: We’ll fix errors, reconcile accounts, and organize your records—no matter how messy.
  • Monthly Bookkeeping: Accurate account classification, timely, and reliable financial reporting, so you always know where you stand.

Our ongoing support means you never have to face your finances alone. We’re just a call or email away, ready to answer questions and keep your business running smoothly.


Brunswick Maine tax preparation meeting

Tax season doesn’t have to be overwhelming. Our experienced tax preparation team provides comprehensive tax-return preparation for individuals and businesses throughout Maine. We stay up-to-date on the latest state and federal tax laws, ensuring you maximize deductions and avoidance of costly mistakes.


Whether you need a simple personal return or complex business filings, we make the process straightforward and stress-free. We’ll help you plan ahead, minimize your tax liability, and keep you fully compliant year after year.


accountant going through payroll

Managing payroll, sales tax, and compliance requirements can be a full-time job. We offer:

  • Payroll Services: Accurate, on-time payroll processing for your team, with all filings handled.
  • Sales Tax Compliance: Stay up-to-date with Maine and federal sales tax regulations.
  • GAAP Compliance: Ensure your financial statements meet all professional standards for audits, investors, and lenders.

With Clarkson and Clarkson INC., you can focus on growing your business while we handle the details.


Accounting consultation in Augusta, Maine

No surprises. No hidden fees. We believe in total transparency, offering flat-fee accounting packages tailored to your needs and budget. Whether you’re a solo entrepreneur, small business, or individual, you’ll know exactly what you’re paying for—every month, every year.


Contact us for a personalized quote and discover how affordable professional accounting can be.


Meet Your Dedicated Senior Accountant


At Clarkson and Clarkson INC., you’re never just a number. Every client receives direct access to a senior accountant with years of experience serving Maine’s diverse business community. Our accounting staff is committed to providing rapid, personal support by phone or email, so you always have an expert in your corner.


No call centers. No generic answers. Just honest advice from someone who knows your business and cares about your success.

Clarkson team assisting a client

Why Choose Clarkson and Clarkson INC.?

  • Local Expertise: Deep roots in Brunswick, Portland, Augusta, and South Portland.
  • Trusted Professionals: Access to Certified CPAs and QuickBooks ProAdvisors.
  • Personalized Service: We treat every client like family, with solutions tailored to your goals.
  • One-Stop Financial Solution: As part of The Clarkson Corporation, we’re expanding to offer even more financial services under one roof.
  • Audit-Ready Results: We take clients from messy books to audit-ready in one annual sprint.
  • Community Commitment: We support local events, volunteer, and invest in the success of Maine’s businesses and families.

Proudly Serving Maine’s Leading Communities


From our home base in Brunswick, we’re deeply invested in the success of our neighbors. In Brunswick, Portland and Southern Maine, we help fuel a vibrant entrepreneurial ecosystem, offering hands-on support to startups and established businesses alike. In Augusta, we’re proud to guide both individuals and organizations through the complexities of state and federal regulations.


Our commitment to these communities goes beyond accounting—we’re active participants in local events, supporters of small business growth, and passionate about helping our clients achieve their financial goals.

Looking Ahead: Your One-Stop Financial Solution


Clarkson and Clarkson Inc.. is just one division of the broader Clarkson Corporation. We’re excited to soon offer expanded financial and advisory services, making it easier than ever to manage all your financial needs under one trusted roof. Stay tuned for new sister divisions launching later this year—your complete financial solution is on the horizon.

Frequently Asked Questions (FAQ)

  • Do you offer virtual consultations?

    Yes! We work with clients throughout Maine both in-person and virtually, making it easy to get expert advice wherever you are.

  • Can you help with messy or outdated books?

    Absolutely. Our QuickBooks clean-up and October “Catch-Up” services are designed for clients who need a fresh start.

  • How do your flat-fee packages work?

    We’ll assess your needs and recommend a monthly or annual package with transparent pricing—no surprises.

  • Are you accepting new clients?

    Yes! We welcome new clients and offer a free initial consultation to discuss your needs.


  • What industries do you serve?

    We work with a wide range of industries, from retail and restaurants to professional services and nonprofits, e-commerce firms as well as manufacturing to the arts.


  • How do I get started?

    Simply call, email, or fill out our online contact form to schedule your free consultation.