Personal Tax Advisors & Accountants in London

The statutory deadline for submitting an online Personal Tax Return is 31st January following the end of the tax year. However, as tax advisors in Marylebone, we recommend preparing your documents much earlier. Early filing gives you a clear view of your liabilities, allowing for better cash flow management and more time to implement tax-efficient strategies before the payment deadline.

If HMRC has issued a notice to file, you must comply to avoid penalties. As your personal tax accountant in London, we can take the stress out of this process. We will gather your income data, identify all eligible reliefs and allowances, and submit an accurate return on your behalf. We also act as your agent in all correspondence with HMRC to ensure your interests are protected.

For many founders and SME owners, a combination of a small salary and dividends is often the most tax-efficient remuneration strategy. However, with recent changes to dividend allowances and Corporation Tax rates, the 'ideal' split has shifted. Our tax consultants provide bespoke calculations based on your specific business goals and personal income levels to ensure you are withdrawing profit in the most cost-effective way.

When you sell a residential property in the UK that isn't your main home, you must usually report and pay Capital Gains Tax (CGT) within 60 days of completion. As specialist property tax advisors, we calculate your exact liability - taking into account acquisition costs, improvement works, and available reliefs - and ensure your CGT return is filed accurately and on time to avoid heavy HMRC fines.

From April 2026 MTD for ITSA means that many self-employed individuals and landlords are required to move from one annual filing to quarterly digital updates. Sampson Fielding is helping clients transition to compatible software and file their submissions. By acting as your digital tax advisor, we ensure your records are compliant well before the mandatory deadlines hit.