What Is An SA104 Form?

You’ll need to include an SA104 form to tell HMRC about your share of the partnership’s income if you’re a partner in a partnership and submit a paper-based Self Assessment forms.

Which version of the SA104 form should I use?

There are two versions of the form:

• SA104S: Use the short version if you’re only declaring trading income from a partnership, or interest after tax from bank and building societies
• SA104F: Use the full version of the form if you need to include additional types of partnership income that you might receive

Who should complete an SA104 Form?

Each individual partner in a business partnership must submit their own Self Assessment tax return. You can do this online, but if you prefer to send a form in the post you should include the supplementary page SA104 form along with your main tax return form.

You only need to complete an SA104 form if you submit your Self Assessment tax return by post. If you’re a partner in multiple businesses, you’ll need to complete a separate form for each partnership.

What about a tax return for the partnership?

It’s the nominated partner’s responsibility to submit an SA800 return for the partnership itself. This should include the details of any profits, losses, or other gains and income. The main partnership’s return also shows the distribution of profits and losses between the partners, and this information must match what you include on your own form.

Partnerships are known as being ‘transparent’ because the entity itself doesn’t pay tax. Instead, HMRC ‘look through’ the partnership’s return to the partners, and then each partner pays tax on the income they receive, which is why you must also include this information on your own tax return.

What do I need to show on an SA104 form?

The form is used to tell HMRC about your share of any profits or losses from the partnership, rather than about what happened to the actual partnership as an entity.

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