Find out what HMRC large business does, how they work with large businesses and how to contact them.
Large business works with around 2,000 of the UK’s largest and most complex businesses to make sure they pay the correct amount of tax at the right time. We are actively investigating the tax affairs of around half of the UK’s largest businesses at any one time.
We also work with the rest of HMRC to tackle tax risk and deal with customers’ tax affairs.
HMRC’s approach to large business tax compliance
We direct our efforts where we think there’s the greatest risk of tax being unpaid. With large businesses, the money involved and the complexity of the tax affairs means we take a very pro-active approach.
We assign a senior tax expert called a Customer Compliance Manager (CCM) to each of the UK’s largest companies. Their primary role is to make sure the business pays everything they owe. This involves building in-depth knowledge of the business and the sectors they operate in.
Our CCMs are experts in their field and they’re supported by other tax specialists, including:
- risk analysts
- forensic and advisory accountants
- audit specialists
- trade sector experts
How to contact large business
Contact your CCM if you’re a large business with a technical question.
If you have a general, non-technical query you can email your large business region.
You’ll need your 3 digit tax office code number that will be shown on all correspondence your Corporation Tax office has sent you: