Who needs to complete a tax return?
self-employed people (including members of a partnership)
company directors (except not for profit organisations)
ministers of religion (any faith)
people who get rent or income from land and property in the UK (but if you are an employee and this income is less than £2,500 a year a tax return may not be necessary)
people who have other untaxed income and the tax due on it cannot be collected though a PAYE tax code
people with taxable foreign income, even if they are not normally resident in the UK (this includes non-resident landlords)
anyone who receives annually (or can be treated as receiving) income from a trust or settlement, or any income from the estate of a deceased person, and further tax is due on that income
trustees and personal representatives (including people who manage the tax affairs of deceased persons)
trustees of certain pension schemes
names or members of Lloyd's
employees and pensioners with more complex tax affairs - see below
If you have any income that is not taxed at source, like rents or freelance earnings, you may need to complete a tax return.
Employees and pensioners with complex tax affairs
You need to fill in a tax return if you:
have an annual income of £100,000 or more
have annual income from savings or investments of £10,000 or more (before tax)
claim against tax for expenses or professional subscriptions of £2,500 or more
have untaxed income of £2,500 or more (although some pensioners may be able to pay the tax on this through their PAYE tax code)
owe tax at the end of the year that cannot be collected through a change to your PAYE tax code for the following year
If you are 65 or over, HM Revenue & Customs may ask you to fill in a tax return so that they can work out how much higher personal allowance or Married Couple's Allowance you should get.