BIM71100 - Computation of liability: introduction to 'previous year' basis period rules


For a trade, profession or vocation which commenced before 6 April 1994:


  • The ‘previous year’ basis period rules apply for 1995-1996 and earlier years
  • There are transitional rules for 1996-1997, see BIM71105
  • There are special cessation rules where the business ceased in 1996-1997, 1997-1998 or 1998-1999.

This paragraph gives an outline of the ‘previous year’ basis period rules which apply for 1995- 1996 and earlier years where accounts were regularly made up to the same date each year.


General rule

The general rule under the ‘previous year’ basis of assessment is that for any tax year income tax is charged on the profits of the previous tax year. Where accounts are prepared for a 12 month period to a date in the previous tax year the assessment for the current tax year is based on the profits shown by those accounts.

Example – a trader has been in business for many years and makes up their accounts each year to 31 December. Their basis period for 1992-1993 is the 12 months to 31 December 1991.

Different rules apply to the early years after the trade commenced, and to the year of cessation and the years immediately before it.


Summary

The following table summarises the basis period rules for each year under the ‘previous year’ basis:


YearBasis period

1

Date trade commenced to 5 April in Year 1
212 months from date trade commenced (unless claim made under old s62(2) ICTA 1988*)
3(a) Where future accounting date in Year 2 is more than 12 months after date trade commenced – 12 months to that date (unless claim made under old s62(2) ICTA 1988*)
(b) Where future accounting date in Year 2 is less than 12 months after date trade commenced – 12 months from date trade commenced (unless claim made under old s62(2) ICTA 1988*)
4 onwards12 months to accounting date ending in previous tax year (see General Rule)
Antepenultimate and penultimate yearsWhere aggregate profits of the antepenultimate and penultimate years exceed the amounts assessed for those two years under the General Rule, the assessments are adjusted to the actual profits for those years.
Year trade ceased6 April in final year to date of cessation.

* Under old Section 62(2) ICTA 1988 a taxpayer could make a claim for the assessments for both Years 2 and 3 to be based on the actual profits of those years. The claim must be made within 6 years of the end of Year 3.


Further guidance

Please contact CT&VAT Technical for guidance on how the ‘previous year’ rules apply where:


  • there was a change of accounting date in 1995-1996 or earlier years, or
  • the business ceased in 1996-1997, 1997-1998 or 1998-1999, or
  • losses have been set off under old Sections 380-382 ICTA 1988.