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Published on 27 November 2024

Selling online? Make sure you keep clear records

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More people are using online platforms to sell goods to make some money. There are different tax rules depending on whether you are trading, making some casual income, or just selling off unwanted personal items. But what if you are doing a mixture of activities? This article explains what type of sales are relevant for tax, and how keeping clear records can help you be more confident in understanding your tax position.

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Online platform sales

If you use an online platform to sell items, you might need to think about your tax position. We have a lot of useful information about online sales in our main guidance as well as a flowchart summarising the tax rules, but the general position is:

  • If you are running a business with a view to making a profit, then that is considered trading income. In the context of selling goods, this may include buying in items to resell or making/improving things specifically to sell on for a profit. There are a number of indicators of trading which HMRC use, these are called ‘badges of trade’ and include the intention to make a profit and are explained in more detail on GOV.UK.
  • If you receive income on a more casual basis this is sometimes called miscellaneous income. For example, this might include income from a hobby. This activity might not meet the ‘badges of trade’, but is still relevant for income tax.
  • If you are selling unwanted personal possessions such as old toys or clothes, this would not be classed as trading or miscellaneous income, and there is usually no tax to pay. In some circumstances there may be capital gains tax when selling valuable items such as jewellery, this is covered in our flowchart.

The difference between trading income and miscellaneous income, as described in the first two bullet points above, is not always clear. This is especially true if you start your activity as a hobby without any real profit-seeking motive, and then start earning money from it more regularly. However, in both cases any income can be covered by the trading allowance, discussed below.

Complications with tax may arise if you are using the same online platforms to make sales related to a trade/miscellaneous income and to sell personal possessions.

Trading allowance

The trading allowance is a tax free allowance for trading and/or miscellaneous income of up to £1,000 per tax year. Our trading allowance page provides details on how this relief works and when you may want to use it, but in brief:

  • If your total trading and/or miscellaneous income for the tax year is not more than the £1,000 trading allowance, you can claim ‘full relief’. In this case HMRC say that you do not need to register for self assessment and complete a tax return, unless you have another reason to do so.
  • If your total trading and/or miscellaneous income is more than the trading allowance, HMRC say that you do need to register for self assessment and complete a tax return. However, you might still be able to use the trading allowance by claiming ‘partial relief’. This means you can deduct the £1,000 trading allowance instead of your actual business expenses.

Therefore, if you are using online platforms to make money, it may be beneficial to use either full relief or partial relief trading allowance, depending on the level of your sales.

  As already mentioned, selling unwanted personal possessions is not trading or miscellaneous income, and so these sales do not need to be included when considering the £1,000 trading allowance threshold. 

If you are using the same online platform to trade and to sell personal possessions, then you need to make sure you keep records of the different types of activities. This is shown in the example below.

Example – Trading allowance full relief

Libby is employed, but also sells items using an online platform to make some extra money. During the tax year, her total sales via the online platform (before any fees were deducted) were £1,350. Of this total:

  • £500 was from selling clothes she no longer wanted (non-trading);
  • £850 was from reselling new items that Libby originally paid £450 for, so she made £400 profit (trading).

Libby can use full relief trading allowance because her total trading income is below the £1,000 trading allowance threshold.

This means she does not have to register for self assessment and complete a tax return, unless she has another reason to do so. There will be no tax to pay on any of her income earned through the platform.

Example – Trading allowance partial relief

Roger is employed, but also makes sales using an online platform. He has total sales income for the tax year as follows:

  • £250 from selling old toys that his children no longer play with (non-trading);
  • £1,100 from reselling new items that Roger originally paid £750 for, so he made £350 profit (trading).

Roger is not able to use full relief trading allowance because his trading income is above the £1,000 trading allowance threshold. This means Roger will need to register for self assessment and complete a tax return.

However, he can use partial relief trading allowance which means he can deduct £1,000 instead of his actual expenses (£750). Roger’s taxable profits from his online trading will therefore be £100.

Roger does not need to declare the £250 from selling the toys.

Understanding the new OECD online platform reports

In January 2025 online platforms will start sending reports to HMRC for the 2024 calendar year for certain sellers. Online platforms users should also receive a copy of any information sent to HMRC about their platform earnings. You can read more about these reports and the criteria for sending them on our webpage, OECD rules.

If you receive a report from an online platform it is important to bear in mind:

  • The report will be for the 2024 calendar year which covers part of two tax years (2023/24 and 2024/25). A tax year runs from 6 April to 5 April in the following year, so the 2023/24 tax year is from 6 April 2023 – 5 April 2024.
  • The report will cover all transactions you have made through the online platform.
  • If you use the same online platform for both trading/miscellaneous income sales and selling unwanted personal items, these will be shown combined together on the report.

HMRC plan to use the reports and other information to identify online platform users who may need to complete a tax return and possibly pay tax. However, it may be the case that even if you receive a report, you did not need to register for self assessment, perhaps because some of the sales in your report are just personal items which are not relevant to your income tax position.

Example – Online platforms reports

Ilya regularly uses an online platform to sell unwanted personal items. In June 2024, Ilya started to trade making items that he sells for a profit, using the same online platform to reach his customers. During the 2024 calendar year, Ilya sells over 40 items for £1,900 (before any deductions for platform fees).

In January 2025, Ilya receives an online platform sales report and isn’t sure what this means for his tax position.

He looks at his transactions during the 2024 calendar year and separates them into different tax years and type of activity (trading or non-trading). This is summarised in the table below:

  Trading income Non-trading income (selling personal possessions)
1 January 2024 - 31 March 2024 (2023/24 tax year)   £350
1 April 2024 – 31 December 2024 (2024/25 tax year) £950 £600

As Ilya didn’t start trading until June 2024, which is in the 2024/25 tax year, he knows that any transactions from 1 January – 31 March 2024 will relate to selling off unwanted personal items. This means for the 2023/24 tax year, there should be no tax due or any requirement to register for self assessment for these transactions. He works out that this income amounts to £350.

For 1 April 2024 to 31 December 2024 Ilya calculates he has earned £950 of gross trading income (so before deductions for platform fees) and £600 from selling personal possessions.

This means that so far in the 2024/25 tax year, Ilya is covered by full relief trading allowance as his trading income is not above £1,000. However, if he earns more than £50 during the period 1 January - 5 April 2025 then he will need to register for self assessment for the 2024/25 tax year and complete a tax return for his trading income. Ilya should also check whether it would be beneficial to claim the £1,000 trading allowance against his gross trading income, as partial relief, rather than deducting his actual business expenses.

Ilya may want to keep a record of this information in case HMRC ask for details about his online platform sales, such as screenshots of his non-trading items. Also, going forward Ilya may want to use different platforms for his different activities so he can separate his trading activities from selling unwanted personal possessions.                                                 

Keeping records

If you are doing a mixture of different sorts of sales using online platforms then it is a good idea to keep a basic record of the gross income for each type of activity as you go along. As shown in the examples above, keeping records will make it easier to identify:

  • What sales are taxable
  • What tax year those sales fall into
  • Whether you can claim full relief trading allowance
  • Whether you need to register for self assessment and complete a tax return.

It will also mean you can easily provide information about your sales to HMRC if requested. This is particularly important if HMRC receive an online platform report for you, under the new OECD rules mentioned above.

There is information on keeping business records on our website and detailed guidance if you have started trading in our self-employment guide and specifically on online trading

Claire Thackaberry
Technical officer

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