--- title: "Self-Employed Profit Calculation in Cardiff | TCK Accounting" description: "Accurate sole trader profit calculation from your income and allowable expenses, ready for Self Assessment and better tax planning." canonical: "https://www.tckaccounting.co.uk/services/self-employed-profit-calculation" --- ![A person at a desk reviewing business documents and a checklist, reflecting preparation for accounting tasks.](/_next/image?url=%2Fapi%2Fmedia%2Ffile%2Fquickbooks-mtd-preconnection-checklist-hero.png%3Fv%3D1769183245309&w=1536&q=75&dpl=dpl_HkjxAMLz8SoKDEaYz6gDcGJLMf1v) Self-employed & partnership accounts # Self-Employed Profit Calculation [Book a free consultation](https://www.tckaccounting.co.uk/redirect-contact) Self-Employed Profit Calculation gives you a clear, accurate profit figure for the tax year by checking your income and allowable expenses. It removes guesswork, helps you stay compliant, and gives you numbers you can trust for Self Assessment and planning. ## What your profit calculation includes To calculate your taxable profit properly, we bring your income and expenses together and apply the correct UK tax treatment. - Review of sales and other income for the tax year - Checks for missing items and obvious duplicates - Categorisation of expenses and identification of allowable business costs - Treatment of mixed personal and business spending where relevant - Consideration of common sole trader adjustments (for example, simplified expenses where appropriate) - A clear profit summary you can use for your Self Assessment return ### When this service is most useful This is a good fit if you are self-employed and want confidence that your profit is right before you file. - You have multiple income streams (for example, contracts, platforms, ad hoc work) - Your bank account mixes personal and business spending - You are unsure what you can claim, or you do not want to risk overclaiming - You are catching up on records and want to get to a reliable year-end figure - You want an accurate profit figure before discussing tax, budgeting, or cash flow ### How the calculation is done We start by confirming the tax year, how you trade, and what records you keep. We then reconcile income and costs from your source documents, query anything unclear, and apply HMRC rules on allowability and apportionment. You will get a straightforward breakdown so you can see how the profit figure was reached. ### What you receive and what happens next You receive a profit calculation summary that is ready to feed into your Self Assessment and useful for planning. If needed, we can highlight areas to improve record keeping for next year and identify items to track monthly so your numbers stay accurate throughout the year. [Book a free consultation](https://www.tckaccounting.co.uk/redirect-contact) ## Frequently Asked Questions What does “profit” mean for Self Assessment? For Self Assessment, profit is your business income minus allowable business expenses for the tax year. It is the figure used to work out your Income Tax and National Insurance. Which expenses can I claim as a sole trader? You can usually claim costs that are wholly and exclusively for business, such as software, travel and certain professional fees. If a cost is partly personal, we apply a reasonable business proportion and keep the calculation supportable. What records do you need to calculate my profit? Typically we need bank statements, sales invoices or platform statements, and receipts for expenses. If you use accounting software, we can work from the reports plus any supporting documents. Can you calculate profit if I was paid in cash or have several income sources? Yes, as long as there is a reliable record of what was earned and when. We will help you pull together cash logs, platform reports, invoices and bank deposits into one consistent view. Is this a one-off service or do I need ongoing bookkeeping? It can be done as a one-off calculation for a tax year if your records are available. Many clients choose ongoing bookkeeping afterwards so profit is easier to track and year-end work is simpler. [Book a free consultation](https://www.tckaccounting.co.uk/redirect-contact) ## Related Services Complete your experience with these services - Self-Employed Deadline Support [View](/services/self-employed-deadline-support) - Error Prevention Review (Self-Employed Returns) [View](/services/error-prevention-review-self-employed-returns) - Self-Employed Tax Efficiency Support [View](/services/self-employed-tax-efficiency-support) - Self-Employed Accounts for Self Assessment [View](/services/self-employed-accounts-for-self-assessment) Show more services - Expense Categories Guidance (Travel, Rent, Supplies) [View](/services/expense-categories-guidance-travel-rent-supplies) - Allowable Expenses Review (Self-Employed) [View](/services/allowable-expenses-review-self-employed) - Self-Employed Record Collection Checklist [View](/services/self-employed-record-collection-checklist) - Partnership Accounts Preparation [View](/services/partnership-accounts-preparation) - Sole Trader Accounts Preparation [View](/services/sole-trader-accounts-preparation) ## Related Blog Posts - [![Person at a desk in a small office environment reviewing documents and using a laptop, symbolizing business accounts preparation.](/_next/image?url=%2Fapi%2Fmedia%2Ffile%2Fqa-filing-profit-figures-uk-business.png%3Fv%3D1769514403751&w=1536&q=75&dpl=dpl_HkjxAMLz8SoKDEaYz6gDcGJLMf1v) ### Do I Still File a Self Assessment Return if I Don’t Know My Profit Yet? Yes—HMRC says you must still file. Use provisional figures, tell HMRC, then amend your return once your final profit is known. Read more ](/blog/do-i-still-file-a-self-assessment-return-if-i-dont-know-my-profit-yet) - [![A computer on a desk in a small business office setting, displaying accounting software.](/_next/image?url=%2Fapi%2Fmedia%2Ffile%2Fhmrc-vat-software-editorial-uk-small-business.png%3Fv%3D1769183233536&w=1536&q=75&dpl=dpl_HkjxAMLz8SoKDEaYz6gDcGJLMf1v) ### MTD for VAT Penalties: What HMRC Says About Filing Without Functional Compatible Software HMRC says it may charge a penalty of up to £400 for every VAT return filed without functional compatible software under MTD for VAT. Read more ](/blog/mtd-for-vat-penalties-what-hmrc-says-about-filing-without-functional-compatible-software)