What is Full tax Investigation

As the name suggests, a Full Tax Investigation is an enquiry looking into the entire tax return of a business by way of investigating the businesses records. This may include full personal records belonging to the directors and/or business owners as well as any business records. HMRC will request submission of all business records for the year of the enquiry, though this may vary depending on the nature of the investigation. Common submissions that are requested by HMRC to perform Full Tax Investigations are: bank statements, credit card statements, VAT records, payroll records, purchase and sale invoices or till records, expense receipts, job quotes/estimates, cheque books and paying-in slips. Where computerised records are kept by a business, HMRC can request details of the software packages used and a copy of the records on disk.

The time taken for the Full Tax Investigation varies depending on its nature and can be considered in length, the average duration of a Full Tax Investigation is approximately 16 months. Due to their comprehensive nature, Full Tax Investigations typically take the longest to perform and are resource heavy. Due to their resource-heavy nature, they will usually only be undertaken where HMRC believes a significant risk of error in a tax return is present. As such, when a Full Tax Investigation is initiated by HMRC, the receiving party should take the inquiry seriously as they could be suspect to evading tax, though some Full Tax Investigations are performed routinely.

In some cases, a Full Tax Investigation is executed purely at random, termed a Random Tax Investigation.


Disclosure of Tax Avoidance

The DOTAS operation provides a way to pre-inform HMRC of your intentions before taking part in a tax avoidance scheme.

promoters of tax avoidance

Tax avoidance schemes aim to assist in the acquisition of tax advantages. These schemes are run by promoters.


If a user is involved in a tax avoidance scheme, you will likely be subject to investigation. You may receive an APN