a question: I am in full -time work, but I am thinking about starting a side bustle to earn some additional money. What are the tax effects that I should be aware of?
answerThis is a common and important question, especially since more people explore ways to increase their income through independent work or online sale or other small projects.
The good news is that it is completely possible to run side bustle along with full -time employment, provided that your contract contract permits. Taking into account, it is necessary to understand your tax obligations to avoid surprises later.
Side bustle is a way to earn an additional income outside the basic function or the main source of income. It can be a hobby, a small company, or any activity that generates revenues in addition to a regular job


If the hustle and bustle of your side earns more than 1000 pounds in a tax year (before expenses), you will need to register as workers for their own account with HMRC and submit a approval of self -evaluation tax. This is known 1000 pounds as trading allowance, and in accordance with this threshold is exempt from taxes.
Once it is crossed, even a little, the income should be reported. You can register online via HMRC and you usually need to do this by October 5 after the end of the tax year in which the trading began.
Once registration, you will need to submit a tax declaration every year, with all income sources and details of the income of self -employment and your expenses. This information is used to calculate the amount of tax and national insurance it owes. The deadline for the file – and pay what you condemn – is January 31 after the end of the tax year.
The government has also announced plans to submit a system for preparing a simple online reports from the tax year 2027/28. This will be suitable for those who earn more than 1000 pounds but less than 3000 pounds of self -employment, although the full details have not yet come.
You may also need to pay national category 4 insurance, depending on your profits. For the tax year 2025/26, this only applies if your profits exceed 12,570 pounds, so it is not something you may need to worry about it at first.
The benefit of free work is that you can claim the permitted commercial expenses to reduce your taxable profit. These may include programs, commercial travel, part of your phone, or internet costs. Make sure to keep accurate records – perfectly using a simple accounting program or a simple spreadsheet – and keep receipts for anything you plan to oppose.
If we look at the future, if your rotation rate grows and exceeds the value -added tax (currently 90,000 pounds), you will need to register in the value -added tax. You should also be aware of the MTD.
From April 2026, individuals who work for their own account who gain more than 50,000 pounds will need to keep digital records and send quarterly updates using compatible programs. This threshold will decrease to 30,000 pounds from April 2027 and 20,000 pounds from April 2028.
Finally, be aware that your profits are added to your total annual income, including your salary.
If you are a basic taxpayer, taxes will be imposed on your side income by 20 %. However, if your total income crosses the higher or additional tax range, taxes may be imposed on some of your profits by 40 % or 45 %.

It can be the start of an exciting and fragmented side bustle, but it is necessary to stay at the top of your tax responsibilities from the beginning.
If this is in doubt, you speak to a tax advisor or accountant, as small professional advice in the early time that can save you time and tension – and helps you focus on developing your business.
- Mark McCluskey (Mark.mccluskey@aabGroup.com) is the first manager of taxes at Aab Group Accountans (www.aabgroup.com). Advice in this column is about the facts surrounding the question. Irish news or shareholders do not accept any responsibility for any direct or indirect loss arising from any dependence on the responses