Form SA100 is a Self Assessment tax return. This form is completed in a variety of circumstances to make a declaration of income to HM Revenue & Customs. It is possible for anyone to complete a tax return annually if they wish to do so, but it is usually people that meet certain criteria who complete a tax return.

If a person is self employed as an individual, a partner or in a company they will need to register for Self Assessment with HMRC, who will then issue the relevant tax return on a yearly basis. Other criteria for completion of a tax return includes anyone with income which exceeds £100,000, company directors, savings or investments that exceed £10,000 or untaxed savings or investments above £2500. Ministers of religion, a member of Lloyd’s, or if you receive income from property above £2500 will also require a tax return.

Pensioners may also have to complete a form SA100 if they are over the age of 65 and have total income which exceeds a specified limit which varies each year. For instance, if someone aged over 65 had income which exceeded £24,000 in the year 2011-12, their age allowances would be reduced accordingly. To ensure that they pay the correct amount of tax, a tax return is required.

There are other instances that require completion of a Self Assessment tax return, and also many cases which are straight forward and a return isn’t required. Contact an accountant or HMRC if you are unsure whether you need to complete a form SA100.

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