Personal Taxes &
Self-Assessments

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:

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)

Unsure if you need to file? We can advise.

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.

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

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.

Expenses You Can Claim

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

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

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

Self-Assessment Deadlines You Must Know

Avoid penalties by staying ahead of HMRC’s deadlines:

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.

Why Choose JSC Accounting?

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

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

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