About SIA

We are a firm of professional accountants delivering practical, tailored financial services to entrepreneurs, start-ups and SMEs across the UK — with a focus on clarity, compliance, and long-term growth.

About SIA Overview

Santus Intelligentia Accountants (SIA) is built on a commitment to providing reliable, transparent, and forward-thinking accountancy services. We support individuals, startups and SMEs with everything from company formation and bookkeeping to tax strategy and growth advisory.

Our team combines traditional values with a tech-enabled approach, giving you the insight and control you need to run your business with confidence.

Whether you’re just starting out or scaling rapidly, we’re here to simplify your financial journey and unlock long-term value.

Why Choose SIA? – Our Journey

2014

2018

2019

2020

2021

2014

Founded with a Mission to Support UK Startups

SIA was launched to offer clear, affordable accountancy services to new businesses and entrepreneurs navigating complex financial systems.

2018

Expanded Services to Include Tax Advisory

We introduced dedicated tax planning services for individuals and businesses, helping clients reduce liabilities and grow confidently.

2019

Launched Payroll & Auto Enrolment Division

With more clients hiring, we launched fully managed payroll solutions, including RTI submissions and pension compliance.

2020

Adapted to Cloud Accounting & Remote Support

We embraced a cloud-first model — helping clients access financial data securely and stay compliant even through the pandemic.

2021

Specialist Support for Non-Resident Landlords & Property Investors

We expanded our advisory scope to support international investors and SPV structuring for buy-to-let companies in the UK.

Why Choose SIA?

01.

SME Specialists

We understand the needs of small and growing businesses — our services are tailored to match your stage of growth.

02.

All-in-One Support

From tax planning and payroll to business formation and growth strategy, everything you need under one roof.

03.

Transparent Pricing

No hidden fees. We offer fair, fixed-cost packages with flexible support to suit your budget.

04.

Cloud-Enabled Efficiency

Work smarter with real-time cloud accounting platforms, supported by our responsive team.

05.

Regulated & Trusted

You’ll work with qualified professionals who keep your business compliant and your finances secure.

06.

Real Relationships

We’re not just number crunchers — we’re your financial partner, helping you plan, grow and succeed.