Sirius Global Solutions Limited — HMRC registered agents based in Stanmore, Greater London, providing fully managed HMRC compliance services for UK businesses, sole traders, landlords, and foreign nationals operating in the United Kingdom.
Sirius Global Solutions Limited manages every aspect of your HMRC compliance — from corporation tax CT600 filing and PAYE RTI submissions to Making Tax Digital, VAT returns, penalty appeals, and HMRC enquiry representation. Zero missed deadlines, zero compliance risk.
From corporation tax and PAYE to Making Tax Digital and HMRC enquiry representation — Sirius Global Solutions Limited handles every HMRC obligation your UK business faces, so you can focus on growing your company with complete peace of mind.
Preparation of your company tax computation, calculation of reliefs and allowances, and electronic submission of the CT600 return to HMRC before the 12-month statutory deadline. Includes R&D tax credit and capital allowance claims.
Monthly Full Payment Submission (FPS) and Employer Payment Summary (EPS) RTI filings with HMRC, year-end P60 returns, new employee P45 management, and employer PAYE liability payment scheduling.
MTD VAT return filing via HMRC-approved bridging software, digital record-keeping setup, and full preparation for MTD for Income Tax Self-Assessment (MTD ITSA) rollout for sole traders and landlords.
Personal SA100 returns for directors, sole traders, landlords, and non-domiciled individuals. Includes foreign income disclosure, remittance basis elections, property pages, and capital gains computations.
Professional defence during HMRC aspect enquiries, full investigations, and VAT visits. We handle all HMRC correspondence, negotiate settlements, and protect your legal rights throughout the enquiry process.
Drafting and submission of formal appeals to HMRC against late filing penalties, late payment surcharges, and inaccuracy penalties — citing reasonable excuse and statutory grounds for mitigation or cancellation.
Preparation and submission of P11D and P11D(b) forms for employee and director benefits — company cars, private medical insurance, loans, and accommodation. Includes Class 1A National Insurance liability management.
Full UK tax registration and compliance for non-domiciled individuals, non-resident landlords, and overseas nationals with UK income — including Non-Resident Landlord scheme registration, UK-India and UK-UAE treaty claims.
Every critical HMRC deadline your business must meet — and how Sirius Global Solutions keeps you ahead of all of them.
| HMRC Obligation | Filing / Payment Deadline | Risk Level | How We Help |
|---|---|---|---|
| Corporation Tax Return (CT600) | 12 months after accounting period end | Critical | Prepare tax computation, review with directors, submit electronically before deadline |
| Corporation Tax Payment | 9 months and 1 day after accounting period end | Critical | Calculate liability in advance, schedule payment, notify you 30 days beforehand |
| VAT Return (MTD) | 1 month and 7 days after VAT period end | Critical | Prepare bridging submission via MTD-compatible software, file and reconcile quarterly |
| PAYE / RTI Full Payment Submission | On or before each pay date | Critical | Process payroll, submit FPS on time, manage PAYE payment to HMRC by 22nd each month |
| P11D (Benefits in Kind) | 6 July following end of tax year | Moderate | Collect benefit data from clients, prepare all P11D and P11D(b) forms, submit by deadline |
| Class 1A National Insurance (P11D(b)) | 22 July (19 July by cheque) | Moderate | Calculate Class 1A NI liability and schedule payment within HMRC window |
| Self-Assessment (Online Filing) | 31 January following end of tax year | Critical | Gather income data, compute tax, file return and schedule balancing payment by 31 Jan |
| Confirmation Statement (Companies House) | Within 14 days of annual review date | Moderate | Review company details for accuracy, submit confirmation statement on schedule |
| Annual Accounts (Companies House) | 9 months after accounting period end (private companies) | Moderate | Prepare statutory accounts, file with Companies House — coordinated with HMRC CT600 |
| CIS Monthly Return | 19th of the month following the tax month | Moderate | Verify subcontractors, calculate deductions, file monthly CIS return with HMRC |
A structured, transparent approach that keeps your business compliant from day one — with no surprises, no missed deadlines, and full visibility at every stage.
We conduct a comprehensive review of your current HMRC registrations, outstanding filings, open obligations, and any existing correspondence or penalties. This gives us a complete picture of where you stand.
We register you for all required HMRC schemes (Corporation Tax, PAYE, VAT, CIS) and become your authorised tax agent — enabling us to correspond directly with HMRC, access your online tax accounts, and act on your behalf.
We build your personalised HMRC compliance calendar with all statutory deadlines mapped to your specific accounting periods, VAT quarters, and payroll dates — then proactively chase information from you 30 days before each deadline.
We gather your financial data through our secure client portal, prepare all returns (CT600, VAT, PAYE RTI, self-assessment, P11D), and send you a clear summary for review before anything is submitted to HMRC.
All returns are submitted electronically to HMRC and Companies House using HMRC-approved software. You receive immediate confirmation of acceptance, a copy of everything filed, and a record retained in your compliance file.
We monitor your HMRC online tax accounts, respond to HMRC queries on your behalf, handle any HMRC compliance checks, and provide annual tax health checks to identify planning opportunities and emerging risks.
Our credentials, track record, and commitment to keeping UK businesses and foreign nationals fully compliant with HMRC at every stage of their growth.
Every return reviewed by a senior compliance professional before submission. Zero inaccuracy penalties in our client portfolio.
Our proactive compliance calendar system ensures every HMRC deadline is tracked and met, with automated reminders 30 days in advance.
Sirius Global Solutions Limited draws on over a decade of tax and compliance expertise across the UK, India, UAE, Hong Kong, and Australia.
Our team serves clients in English, Hindi, Gujarati, and Urdu — making HMRC compliance accessible to the full diversity of UK business communities.
Many UK compliance firms are not equipped to handle the unique cross-border tax obligations that foreign nationals, non-domiciled individuals, and overseas investors face when operating in the UK. Sirius Global Solutions is different — we specialise in exactly this.
We determine your UK tax residence status under the SRT for each tax year, establishing whether you are UK resident, non-UK resident, or in a split-year scenario — the foundation of all HMRC compliance for foreign nationals.
We advise on the remittance basis of taxation, the remittance basis charge (RBC), and the interaction with double tax treaties — ensuring non-domiciled individuals pay only what is legally required.
Foreign nationals receiving UK rental income must register under the NRL scheme. We handle the HMRC registration, collection of tenant exemption certificates, and annual NRL self-assessment return.
We identify applicable UK tax treaties (with India, UAE, Hong Kong, Australia, and 130+ other countries) and prepare formal relief claims to eliminate or reduce double taxation on your cross-border income.
Our HMRC compliance services are structured to serve the full spectrum of UK taxpayers — from small limited companies to multinational subsidiaries and individual foreign nationals.
CT600 corporation tax, PAYE, VAT, Companies House filings, and P11D — full statutory compliance management for newly incorporated and established UK limited companies.
Self-assessment registration, annual SA100 return preparation, MTD ITSA transition planning, and Class 2/4 National Insurance management for UK self-employed individuals.
Self-assessment property income pages, UK property tax planning, Section 24 mortgage interest restriction analysis, and capital gains tax on property disposals.
Full statutory compliance management for UK subsidiaries of Indian, UAE, Hong Kong, and Australian parent companies — coordinated with group reporting requirements.
Our compliance team walks you through every HMRC obligation your UK business faces — corporation tax deadlines, PAYE RTI requirements, VAT under Making Tax Digital, and what happens if HMRC opens a compliance check on your company.
What our clients say about Sirius Global Solutions' HMRC compliance services.
When HMRC opened a compliance check on our limited company, I had no idea what to do. Sirius took over entirely — all correspondence went through them, and the enquiry was closed with no additional tax due within four months. Exceptional handling.
As an Indian national working in the UK, I was completely confused about my tax obligations — whether I needed to declare my Indian income, and how the treaty worked. Sirius explained everything clearly and filed my returns perfectly. I've recommended them to every international colleague I know.
We have UK, UAE, and Hong Kong entities, and the cross-border compliance was a nightmare before we found Sirius. They now handle everything — CT600 in the UK, coordinated with our Dubai and HK filings. One team, full picture, zero surprises.
Practical answers to the most common questions UK businesses and foreign nationals ask us about HMRC compliance obligations, deadlines, penalties, and what our service includes.
Have a Specific Question?
Our HMRC compliance specialists are available Monday–Friday, 09:00–18:00 to answer your specific situation — free of charge for a first conversation.
Call +44 74 8275 5633Whether you are a UK business, sole trader, landlord, or a foreign national with UK tax obligations, our HMRC compliance team is ready to help. First consultation is always free.
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