Massachusetts millionaire surtax and biotech growth

Fractional CFO & CPA Services in Massachusetts

Massachusetts has a flat income tax plus a 4% surtax on income above $1 million, which matters for owners selling a business or having a big year. NexusWorks provides CPA-led bookkeeping, tax planning and fractional CFO services to Massachusetts companies remotely.

Remote CPA support across Massachusetts

Books and taxes for Massachusetts owners

Monthly reporting included

On-Time Delivery

99.7 %

Acceptance Rate

95 %

Completed Projects

200 +

Client Engagements

100 +

Massachusetts Bookkeeping, Tax and CFO Support

Boston and Cambridge biotech, software and professional firms need investor-ready reporting and careful planning around large income events. We keep books monthly, plan around the surtax and handle sales and use tax.

Bookkeeping & Accounting

Best For:

Growing biotech and life sciences and technology companies

Fractional CFO Services

Best For:

Massachusetts companies ready for CFO-level guidance without a full-time hire

Tax Planning & Strategy

Best For:

Profitable Massachusetts businesses paying more tax than they should

Tax Compliance & Filing

Best For:

Owners who want Massachusetts deadlines tracked for them

Massachusetts Tax Strategy

Massachusetts tax planning often focuses on the millionaire’s surtax, the pass-through entity excise and timing major income events. We model business sales, bonuses and distributions so the surtax does not catch you off guard.

Millionaire Surtax Planning

The 4% surtax applies once income passes the threshold. We plan the timing of sales, bonuses and distributions to manage it.

Pass-Through Entity Election

Massachusetts offers an elective PTE excise. We model the federal benefit for your owners.

Investor-Ready Reporting

Venture-backed companies need accrual books and clean monthly closes. We build reporting that supports fundraising.

Trusted CPA & Fractional CFO Services in Massachusetts

Massachusetts is a center for biotech, life sciences, higher education, finance and technology, with business activity concentrated around Boston, Cambridge, Worcester and Springfield. Business owners face a flat state income tax, an additional surtax on very high incomes and corporate excise tax. NexusWorks helps Massachusetts businesses plan and stay compliant.

CPA advising a business owner on financial reports
Industries We Serve

Industries We Serve in Massachusetts

We serve Massachusetts biotech and life sciences companies, technology startups, investment and financial firms, healthcare practices and education-related businesses in Boston, Cambridge and Worcester.

Professional Firms

Accounting support for Cambridge and Boston firms that bill by the hour or by project.

Real Estate Businesses

Investors and property managers in Worcester and Springfield get property-level books and depreciation planning.

Multi-State Businesses

Massachusetts companies selling into other states get nexus reviews and multi-state filings. We also watch Massachusetts-specific rules: a 4% surtax applies to income above $1 million.

eCommerce & Digital Businesses

Digital businesses in Boston get revenue recognition and sales tax tracking across states.

Healthcare

Medical, dental and therapy practices in Boston and Worcester get payer reconciliation and payroll support.

High-Income Business Owners

Massachusetts's flat income tax keeps state planning simple, so we focus on federal savings, retirement plans and timing for high earners.

Why Massachusetts Owners Work With Us

We plan around the Massachusetts millionaire surtax for owners with big income years.

Senior CPA review on books, returns and reports.

Remote service across Massachusetts, with video meetings and secure document sharing.

One team for books, taxes and CFO work.

Transparent monthly fees, no long-term lock-in.

Request An Instant Consultation

Or Call Us Today At +1 310-810-1790

What Business Owners
Say About Nexus

Trusted by 200+ happy
customers & counting

Areas we cover

Where We Work in Massachusetts

We work with businesses in Boston, Cambridge, Worcester, Springfield and Lowell through video meetings and secure document sharing.

Major Business Cities

Parks
High Schools
Key Landmarks
Colleges / Uni
Charities
Key Roads

Plan Massachusetts Taxes Before Big Years

Book a call to review surtax planning, PTE elections and bookkeeping for your Massachusetts company.

Why Businesses Work With

NexusWorks

CPA oversight from day one
Integrated accounting and tax
Bank-level secure document sharing
Simple monthly pricing
Serving Boston and all of Massachusetts

Frequently Asked Questions

NexusWorks accounting team answering client questions

We provide bookkeeping, tax planning, tax preparation, financial reporting, and Fractional CFO services for businesses across Massachusetts.

Yes. We provide ongoing bookkeeping, account reconciliations, and financial reporting to help keep your records organized and accurate.

Massachusetts adds a 4% surtax on annual taxable income above an inflation-adjusted threshold of roughly $1 million, on top of the flat income tax. Business sales and large distributions can trigger it, so timing matters. We model these events in your tax plan.

Corporations pay the Massachusetts corporate excise tax, individuals pay state income tax on pass-through profits, and most retail sales are subject to sales tax. Massachusetts also offers an elective pass-through entity excise. We coordinate these filings for you.

Yes. We help startups with investor-ready financials, R&D cost tracking, burn rate and runway forecasting, and Fractional CFO guidance for fundraising.

Massachusetts has a flat state income tax and a 6.25% state sales tax. LLCs here generally face a $500 annual report. Also note that a 4% surtax applies to income above $1 million. We map which of these apply to your business and add each one to your compliance calendar.

Massachusetts charges $500 to file the Certificate of Organization and $500 each year for the annual report. Many owners compare this with forming a corporation; we help you choose.

Yes. Our office is in Torrance, California, and we work with Massachusetts clients through video meetings, secure portals and cloud accounting software. Your books, taxes and reports are handled by the same CPA-led team.