IT Support for Accountants and Accountancy Firms

Managed IT, cybersecurity and Microsoft 365 for accountancy firms across Northern Ireland and the UK, built around client data confidentiality, Making Tax Digital, and the deadlines your firm cannot afford to miss.

The problem your firm actually has

Technology that has to be secure, compliant, and available on filing day

Accountancy runs on deadlines that do not move. Self-assessment, year end, VAT returns under Making Tax Digital, none of them wait for a system to come back online. When practice management software is unavailable or client financial data is exposed, the cost is not only technical. It is client trust, professional standing, and in the worst case a matter for your regulatory body.

Most firms are carrying risks they cannot see: client financial data held with weaker protection than the sensitivity deserves, cloud accounting platforms configured on defaults rather than hardened properly, and a security position that will not survive a client’s own due diligence or a cyber insurance renewal.

What we do for accountancy firms

We take full responsibility for your technology and security

So your team can focus on client work, and your partners can stop worrying about IT.

Managed IT, owned end to end

Your systems monitored, maintained and improved, with one monthly bill and no surprises. Staff supported quickly, by people who understand the pressure of a filing deadline.

Cybersecurity, built in

Protection aligned to Cyber Essentials and insurer requirements, including the email and payment controls that stop invoice fraud before money moves.

Microsoft 365, done properly

Secure document sharing with clients, and a modern workplace configured to enterprise security standards, not left on defaults.

The systems you run on

We keep the practice management and cloud accounting platforms your firm depends on available and integrated. [Confirm and name the systems you support, for example Xero, IRIS, Sage, QuickBooks.]

Why firms choose INNOSEC

Specialists in professional services, not generalists

We understand an accountancy firm’s obligations, not just its hardware.

Specialists, not generalists

Accountancy, legal, finance and architecture are all we do.

Fluent in your compliance world

ICAEW and ACCA standards, GDPR and the ICO, Making Tax Digital, Cyber Essentials and Cyber Essentials Plus.

One monthly bill, no surprises

Simplicity scales, complexity fails.

Security-first, and we own the outcome

If we commit to it, we measure it, test it and deliver it.

Local, and close to you

Based in Northern Ireland, serving firms across Ireland and the UK.

Accountable support

A team that answers, not a ticket queue that goes quiet in filing season.

Built for how accountancy firms are held to account

Your clients, your insurer and your professional body now expect evidence, not assurances. We give you a security and compliance position you can show, not just claim: Cyber Essentials readiness and certification, GDPR and ICO alignment, controls mapped to recognised standards, and reporting your partners can take to a client review.

Want the detail behind all this?

Our Knowledge Hub goes deeper on cybersecurity, Microsoft 365, compliance and business continuity for accountancy firms, with practical guidance you can use whether or not you work with us.

Related insights

Useful reading for accountancy firms

The encryption setting that disappeared from your phone, and why your firm should care

Sometime in early 2025, a setting on my iPhone stopped working. No email. No notification. No explanation. Advanced Data Protection,

27/08/2026

What Your IT Provider Is Responsible For — And What They Are Not

Most professional services firms operate under a quiet assumption: that their IT provider is handling it. Handling what, exactly, is rarely defined.

20/04/2026

What Happens to Your Firm’s IT When a Key Person Leaves

Imagine your office manager hands in their notice on a Monday morning. By Friday, you’ve started to discover what she actually knew. The

20/04/2026

Article

How to stop invoice and payment fraud

The email and payment controls that catch a fraudulent request before any money moves.

Article

Cyber Essentials for accountancy firms, explained

What certification involves, why clients and insurers ask for it, and how to keep it year on year.

Article

The IT Ownership and Risk Self-Assessment

Three minutes to see where your firm stands on confidentiality, compliance and continuity.

Questions accountancy firms ask us

Straight answers

Do you support our practice management and cloud accounting software?

[Answer with the systems you support and how you keep them available and integrated.]

Can you help us achieve Cyber Essentials or Cyber Essentials Plus?

Yes, from readiness assessment through certification, and we maintain it afterwards so you stay certified year on year.

How do you protect us against invoice and payment fraud?

With layered email authentication and payment-verification controls, plus staff training, so a spoofed request never reaches the point of payment.

Can you help with data protection under GDPR?

Yes, we align your systems and data handling to GDPR and ICO expectations, so client financial data is protected properly, not just assumed to be.

Do you work with firms outside Northern Ireland?

Yes, we support accountancy firms across Ireland and the UK.

How does pricing work?

[State your model: per user, per month, one bill, no surprises.]

Next step

See where your firm stands

Book a free IT and security review and we will show you exactly where your risks and costs are, with no obligation.

Not ready to talk? Take the 3-minute IT Ownership and Risk Self-Assessment.

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IT Support for Accountants and Accountancy Firms

Technology that has to be secure, compliant, and available on filing day

We take full responsibility for your technology and security

Specialists in professional services, not generalists

Built for how accountancy firms are held to account

Want the detail behind all this?

Useful reading for accountancy firms

The encryption setting that disappeared from your phone, and why your firm should care

What Your IT Provider Is Responsible For — And What They Are Not

What Happens to Your Firm’s IT When a Key Person Leaves

Straight answers

See where your firm stands

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Services

Service lines

Managed IT

Cloud Transformation

Co-Managed IT

IT Leadership

Microsoft 365

Cybersecurity

Industries

By Industry

Law Firms

Accounting

Financial Services

Architecture

Services Areas

Locations

Antrim

Bangor

Belfast

Carrickfergus

Comber

Donaghadee

Holywood

Lisburn

Newtownabbey

Newtownards