Self Assessment Accountant in Streatham

Who has to file a return

• You are self-employed and your trading income was more than the £1,000 trading allowance
• You rent out property, including a single room or a flat
• You are a private hire or taxi driver, a delivery courier, or work through an app
• You are a CIS subcontractor and have had tax deducted at source
• You had a capital gain, for example on selling a second property or shares
• You or your partner claimed Child Benefit while earning above the high income threshold
• You have untaxed income from dividends, savings, or work abroad

The deadlines that matter

The tax year runs from 6 April to 5 April. A paper return is due by 31 October after the end of that tax year, and an online return by the following 31 January, which is also when the tax is payable. If you make payments on account, the second one falls on 31 July.

Filing late triggers an automatic £100 penalty even when you owe nothing at all, and further penalties and interest build up after that. Getting the return in early does not mean paying early, and it does mean knowing your bill well in advance.

What we do

• Work through your records, income and allowable expenses
• Claim the reliefs and allowances you are actually entitled to
• Prepare the return and show you the figures before anything is submitted
• File with HMRC and confirm it has been received
• Tell you exactly what to pay, when, and how

Common situations we see in South London

A lot of our Self Assessment work is for drivers and couriers, CIS subcontractors, and landlords. Each has its own traps: mileage versus actual running costs for drivers, deductions and refunds for subcontractors, and which expenses are genuinely allowable against rental income. These are the areas where a return prepared in a hurry usually costs someone money.