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Personal Taxes &
Self-Assessments

HMRC Personal Tax Self Assessment

Whether you're a sole trader, landlord, director, or subcontractor under CIS, we make self-assessment straightforward. Our expert team prepares and submits your tax return accurately, helping you avoid penalties and claim back every allowable expense.

Who Needs to Complete a Self-Assessment Tax Return?

 

You may need to file a Self-Assessment if you:

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  • Are self-employed (sole trader or partnership)

  • Are a company director receiving dividends

  • Earn over £1,000 in side income (e.g. freelancing)

  • Receive income from property (UK or overseas)

  • Have foreign income or investments

  • Are registered under the Construction Industry Scheme (CIS)

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Unsure if you need to file? We can advise.

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Fast Tax Rebates for CIS Subcontractors

 

If you’re registered as self-employed under the Construction Industry Scheme (CIS), you’ve likely had 20–30% of your pay withheld as tax. In many cases, you’re due a refund.

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We specialise in quick turnaround CIS tax returns - most clients receive their rebate within 5-10 working days after filing. We’ll ensure:

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  • All allowable expenses are claimed

  • Tax deducted is fully accounted for

  • You receive the maximum rebate possible

 

All we need are your payslips, income summary, and expense details.

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Expenses You Can Claim

 

To reduce your tax bill, we help identify and claim legitimate business expenses, including:

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  • Travel and mileage (business journeys)

  • Tools and equipment

  • Uniform and protective clothing

  • Mobile phone and internet (business portion)

  • Home office costs

  • Accounting fees

  • Training related to your trade

  • Materials and subcontractor payments

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We’ll help you keep it compliant and claim what you’re entitled to.

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Self-Assessment Deadlines You Must Know

 

Avoid penalties by staying ahead of HMRC’s deadlines:

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  • Register for Self-Assessment: by 5 October following the end of the tax year

  • Submit Online Tax Return: by 31 January

  • Pay Tax Owed: by 31 January

  • Payments on Account (if required): 31 January & 31 July

 

Missed the deadline? We can still help file and minimise penalties.

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Why Choose JSC Accounting?

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We provide a fast, friendly, and digital-first tax return service for individuals and small businesses across the UK. Our clients love us for:

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  • Quick turnaround (often within 48 hours of receiving info)

  • Clear, fixed-fee pricing

  • Maximised rebates for CIS workers

  • Expense reviews to reduce tax owed

  • Guidance on saving for future payments

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We take care of the paperwork - so you can focus on your work.

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File your return with confidence.

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