Income You Must Declare on Self Assessment

• Self-employment (sole trader, freelance, side hustle, hobby with turnover over £1000)

• Employment income 

• Rental income from UK or overseas property

• Savings interest 

• Dividend income and other investment returns

• Foreign income (e.g. pensions, property, earnings abroad)

• Capital gains from selling shares, property, or assets

• Pension income and taxable lump sums

• Tips, commissions, freelance or casual earnings

• Income from trusts, estates, or settlements

• Other untaxed income such as online sales, gigs, or digital services

 

Forms Typically Used in Self Assessment

• SA100 – Main individual tax return (required for everyone)

• SA102 – Employment income details

• SA103S / SA103F – Self-employment (short/full form depending on turnover)

• SA104S / SA104F – Partnership income

• SA105 – Property income (including rental properties)

• SA106 – Foreign income and gains

• SA108 – Capital Gains Tax details

• SA109 – Non-residence or dual tax residence

• SA101 – Additional information (e.g. tax reliefs, pension contributions)

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