Certified Accountants & Tax Advisors · Essex & London

Your Numbers. Our Expertise. Your Growth.

MSB are certified accountants and tax advisors with offices in Basildon, Southend-on-Sea and East London. Trusted by SMEs, startups, creative agencies and freelancers since 2011.

Our locations
Basildon Southend-on-Sea East London
Basildon Accounting Southend-on-Sea Tax Advisory East London VAT Returns Shoreditch Payroll Startups Self Assessment Creative Agencies Bookkeeping Freelancers Business Advisory Basildon Accounting Southend-on-Sea Tax Advisory East London VAT Returns Shoreditch Payroll Startups Self Assessment Creative Agencies Bookkeeping Freelancers Business Advisory
3
Office Locations
200+
Clients Served
£4M+
Tax Saved for Clients
14 Yrs
Established Since 2011
Essex → E1
Trusted Across the Region

Where to Find Us

Our Offices

Three locations. One team. The same trusted service wherever you are.

01

MSB Basildon

◎ Basildon, Essex

Our founding office, open since 2011. MSB Basildon has been serving local businesses, sole traders and SMEs across Essex for over a decade — delivering reliable, plain-English accountancy and tax advice to the businesses that keep Essex moving.

Accounting Tax Returns VAT Payroll Self Assessment
Visit MSB Basildon →
02

MSB Southend

◎ Southend-on-Sea, Essex

Our second established practice, serving the Southend-on-Sea business community with the same fixed-fee, no-jargon approach that built MSB's reputation in Basildon. From sole traders to growing limited companies, we've got Southend covered.

Accounting Tax Returns VAT Payroll Bookkeeping
Visit MSB Southend →
03

MSB London

◎ Shoreditch · Aldgate · East London

Our newest chapter. MSB London brings 14 years of Essex expertise to East London's tech startups, creative agencies and freelancers — with specialist knowledge of R&D tax credits, IR35, startup structures and the financial realities of running a modern creative or tech business.

Startup Accounting R&D Tax Credits IR35 CFO Support VAT & Payroll
Visit MSB London →

What We Do

Our Services

End-to-end accounting and tax — available across all three locations.

📒

Accounting & Bookkeeping

Accurate monthly books so you always know where your business stands. No year-end panic, no nasty surprises.

📋

Tax Returns & Self Assessment

Personal and corporate tax returns filed accurately and on time. Every allowance identified. Never overpay.

🧾

VAT Returns

MTD-compliant VAT returns prepared and submitted on your behalf. Deadlines always met.

👥

Payroll

Full payroll management — RTI submissions, auto-enrolment, P60s and P11Ds. Your team paid correctly, every time.

📈

Business Advisory & CFO Support

Strategic financial guidance without the full-time CFO cost. Cash flow, growth planning and investor-ready reporting.

🔬

R&D Tax Credits

Specialist R&D tax relief claims for tech startups and innovative businesses. Maximise what you're owed from HMRC.

Who We Work With

Built for Your Business

From sole traders to scale-ups — we understand the businesses we serve.

🚀

Tech Startups & SaaS

R&D credits, SEIS/EIS, incorporation and investor-ready accounts for East London founders.

🎨

Creative Agencies & Studios

Agency bookkeeping, VAT and payroll for design studios, production companies and creative firms.

💼

Freelancers & Contractors

Self Assessment, IR35 guidance and limited company tax — so you keep more of what you earn.

🏢

Established SMEs

Year-end accounts, VAT, payroll and strategic advice for growing businesses across Essex and London.

Our Story

Essex Roots.
London Ambitions.

MSB was founded in 2011 with a simple belief — that small businesses deserve the same quality of financial advice as large ones, without the large price tag or the jargon that comes with it.

We started in Basildon, grew into Southend-on-Sea, and are now bringing that same trusted approach to East London's thriving startup and creative community. Three offices, one team, one standard of service.

Every client gets a dedicated accountant, fixed monthly fees and advice they can actually understand and act on. Trading under the registered name of RSB Essex Ltd.

2011
Year Founded
200+
Clients Served
3
Office Locations
£4M+
Tax Saved
2011

MSB Basildon Founded

Our founding office opens in Basildon, Essex. Built on fixed fees, plain-English advice and a genuine commitment to every client we serve.

2023

MSB Southend Opens

Growing demand across Essex leads to our second practice opening in Southend-on-Sea in April 2023, extending our reach along the Thames Estuary.

2026

MSB London Launches

We bring 14 years of expertise to East London — serving the tech startups, creative agencies and freelancers shaping the future of business in Shoreditch, Aldgate and beyond.

Next

What Comes Next

We're building the accountancy practice that grows with its clients — wherever business takes them.

Get in Touch

Find Your
Nearest Office.

Book a free 30-minute discovery call with your local MSB office. Plain-English advice, no commitment, no sales pitch.

Basildon Essex · Est. 2011 Southend Essex · Est. April 2023 East London Shoreditch · Aldgate · New 2026