Starting a business alongside working full time paye

Ironmad

New Member
Jan 10, 2026
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Hi everyone

I am looking into setting up a side business along side working full time paye, I have no idea how this would effect my taxable income while having 2 income sources could anyone advise the most efficient way of doing this?

I would be operating as a sole trader

If I need to give anymore information please ask away
 
It's a very broad question

In the most simplistic terms, you'll need to register for self assessment and file returns. Any profit as a sole trader will be classed and taxed as personal income.

You may not actually pay tax for 18 months - be sure to put money aside, because it will hurt when it happens!

For tax-optimisation you will need to pay for dedicated personal advice
 
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fisicx

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Sep 12, 2006
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A good place to start:

 
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Ironmad

New Member
Jan 10, 2026
3
0
It's a very broad question

In the most simplistic terms, you'll need to register for self assessment and file returns. Any profit as a sole trader will be classed and taxed as personal income.

You may not actually pay tax for 18 months - be sure to put money aside, because it will hurt when it happens!

For tax-optimisation you will need to pay for dedicated personal advice
Would my paye and my self employed income be treated separately? Are do they be combined for tax purposes?

If the combined income puts me into the higher tax bracket is there a more efficient way to operate in my situation?

Thanks
 
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DWS

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Oct 26, 2018
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Would my paye and my self employed income be treated separately? Are do they be combined for tax purposes?

If the combined income puts me into the higher tax bracket is there a more efficient way to operate in my situation?

Thanks
They are combined for Income Tax, it might be more efficient to open a Ltd Company but so many other things to consider.
Maybe worth having a chat with a local accountant to go over your options, most would give a free initial consultation .
 
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fisicx

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Sep 12, 2006
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If your side business earns under £1000 you don’t need to tell anyone.
 
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MyAccountantOnline

Business Member
Sep 24, 2008
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Hi everyone

I am looking into setting up a side business along side working full time paye, I have no idea how this would effect my taxable income while having 2 income sources could anyone advise the most efficient way of doing this?

I would be operating as a sole trader

If I need to give anymore information please ask away

This is exactly how many small businesses start and its not an issue to have PAYE income and sole trader income at the same time. Your PAYE tax continues as normal through your employer, and you declare the sole trader profits separately on a self-assessment tax return.

The sole trader profit is added to your other income and the tax you will pay will depend on your other income.

There are lots of things to consider as a sole trader including registering with HMRC, paying Self Assessment and keeping records for MTD (Making Tax Digital).

The most tax efficient way of trading will depend on your PAYE income, expected profit levels and personal circumstances, it's not always a sole trade, so it's worth taking professional advice from an accountant when you start.
 
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