Taxable Profit: Which Profits Count for UK Companies
Understanding which profits count towards Corporation Tax is essential for every UK limited company preparing year-end accounts, Corporation Tax returns, or business forecasts. Many directors assume that all company income is automatically taxable, but in practice your taxable profit is often very different from the accounting profit shown in your profit and loss account. HMRC requires specific tax adjustments before arriving at the final figure used to calculate Corporation Tax liability.
This guide explains what taxable profit means, which types of income are included within Taxable Total Profits (TTP), which forms of income may be exempt, and how allowable deductions can reduce your Corporation Tax exposure. It is particularly useful for SMEs, startups, consultants, property companies, and growing businesses that want to improve reporting accuracy and avoid common Corporation Tax mistakes.
With increased HMRC focus on compliance, digital recordkeeping, and accurate Corporation Tax reporting, understanding how taxable profits are calculated has become increasingly important. Errors involving investment income, disallowable expenses, or chargeable gains can result in incorrect tax returns, overpaid tax, or unnecessary HMRC enquiries. Understanding these rules also supports better financial planning and helps businesses make more informed commercial decisions.
Understanding how your company accounts connect to your Corporation Tax position is an important foundation — our guide on company accounts and Corporation Tax facts explains the key relationship between the two clearly.
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The Difference Between Accounting Profit and Taxable Profit
Your company’s accounts are prepared under accounting standards (typically FRS 102 for most UK SMEs). HMRC requires adjustments to this accounting profit to arrive at taxable profit, known as Taxable Total Profits (TTP). These adjustments include:
- Adding back expenses that are not allowable for tax (e.g. client entertainment, depreciation)
- Deducting capital allowances (the tax equivalent of depreciation on qualifying assets)
- Including or excluding certain types of income based on specific tax rules
The resulting TTP figure is what your company pays Corporation Tax on, not simply the net profit shown in your accounts.
For a full step-by-step walkthrough of how to arrive at your Taxable Total Profits figure, our guide on calculating taxable income for companies covers every adjustment stage with a worked example.
Types of Income That Form Part of Taxable Profits
1. Trading Profits
The most significant component for most companies. Trading profits are the profits arising from your company’s core business activities – selling goods, providing services, or any other commercial trading. This is calculated as trading income minus allowable trading expenses.
Key point: Certain expenses are not deductible for tax even if they appear in your accounts. Examples include depreciation (replaced by capital allowances), client entertaining, and fines.
Whether your company’s activities qualify as a trade for tax purposes is not always straightforward — our guide on the meaning of trade for tax purposes explains how HMRC defines and assesses trading activity.
2. Investment Income
Investment income earned by your company is generally taxable. This includes:
- Interest received on bank accounts or loans made by the company
- Rental income from property owned by the company
- Royalty income
Note that UK dividends received from other companies are generally exempt from Corporation Tax (see below). Foreign dividends may or may not be exempt depending on the source and the UK’s tax treaties.
3. Chargeable Gains
If your company disposes of a capital asset – such as property, shares in another company, or goodwill – and makes a profit, that profit is a chargeable gain and forms part of your TTP. The gain is calculated as the disposal proceeds minus the original cost (plus allowable enhancement expenditure).
For assets held before 31 December 2017, Indexation Allowance can reduce the gain to reflect inflation.
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Income That Is NOT Subject to Corporation Tax
UK Dividends Received
Dividends received from UK companies are generally exempt from Corporation Tax. This prevents double taxation – the paying company has already suffered Corporation Tax on the profits from which the dividend was paid.
Certain Overseas Dividends
Many overseas dividends are also exempt, though the rules are complex and depend on the relationship between the companies and any applicable double tax treaties.
Capital Grants (in some cases)
Government capital grants may not form part of trading income, though this depends on the purpose and structure of the grant.
Allowable Deductions That Reduce Taxable Profits
Arriving at your taxable profit also involves claiming all allowable deductions:
- Staff salaries, wages, and employer National Insurance
- Rent, rates, and utility costs for business premises
- Professional fees (accountancy, legal, etc.)
- Capital allowances on qualifying plant, machinery, and equipment
- Business loan interest (subject to restrictions)
- Research and Development expenditure (potentially with enhanced relief)
Companies should also be aware that certain costs incurred before trading began may qualify for tax relief our guide on pre-trading expenditure for companies explains which costs are eligible and how to treat them correctly.
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A Practical Example
Company Example
A consulting company has:
Accounting profit: £180,000
Depreciation in accounts: £20,000 (add back for tax)
Capital allowances claimed: £35,000 (deduct for tax)
UK dividends received: £5,000 (exclude – exempt)
Client entertaining: £3,000 (add back for tax)
Taxable Profit = £180,000 + £20,000 – £35,000 + £3,000 = £168,000
Corporation Tax at 25% less Marginal Relief applies to this figure, not the £180,000 accounting profit.
Beyond Marginal Relief, there are several other reliefs and allowances that can reduce your Corporation Tax liability further our guide on reliefs and allowances for Corporation Tax purposes sets out the full range available to UK companies.
Recordkeeping for Taxable Income
HMRC can enquire into your Corporation Tax return for up to four years (or longer in cases of fraud or deliberate errors). Maintaining accurate records of all income streams is essential.
We recommend:
- Using cloud accounting software (Xero, QuickBooks, etc.) to categorise income automatically
- Keeping supporting documentation for all investment income and asset disposals
- Reconciling bank statements to your accounting records at least monthly
Make Sure You’re Not Overpaying Corporation Tax
At Cigma Accounting, we help businesses across London understand what is included in taxable profits so they can calculate corporation tax correctly and avoid reporting errors. From Farringdon, including Blackfriars and St Paul’s, many companies are unsure how different income streams and adjustments affect their final tax position, which is why our guidance focuses on simplifying the rules into practical, real-world understanding.
Knowing which profits are taxable and which adjustments must be made is essential for accurate year-end reporting and avoiding HMRC enquiries. With physical offices across London, we support businesses in preparing compliant calculations that reflect true taxable income and ensure corporation tax returns are completed correctly.
Frequently Asked Questions
What profits are included in a company’s taxable income?
A company’s taxable income includes trading profits, investment income, and chargeable gains. These are calculated after adjusting accounting profit for tax rules, ensuring only HMRC-defined taxable sources are included in the final corporation tax computation.
Are all business profits subject to corporation tax?
Most business profits are subject to corporation tax, including income from trading activities and investments. However, adjustments are made for allowable deductions, exempt income, and non-taxable items to determine the final taxable profit.
Do capital gains count towards taxable income for companies?
Yes, capital gains made by companies on the disposal of assets are included in taxable income and subject to corporation tax. These gains are calculated separately but form part of the overall taxable profit for the accounting period.
Is rental income included in a company’s taxable income?
Rental income earned by a company is generally included in taxable income and subject to corporation tax. This applies whether the property is in the UK or overseas, subject to any relevant reliefs or deductions.
What income is not included in taxable profits?
Some income may be exempt or not taxable, depending on HMRC rules and reliefs. Examples include certain capital receipts, intra-group transactions in specific cases, or income offset by allowable losses and deductions.
How are investment profits treated for corporation tax?
Investment profits such as dividends (in some cases), interest, and gains on investments are included in taxable income, although certain exemptions or reliefs may apply depending on the source and structure of the investment.
A company’s taxable income includes trading profits, investment income, and chargeable gains. These are calculated after adjusting accounting profit for tax rules, ensuring only HMRC-defined taxable sources are included in the final corporation tax computation.
Most business profits are subject to corporation tax, including income from trading activities and investments. However, adjustments are made for allowable deductions, exempt income, and non-taxable items to determine the final taxable profit.
Yes, capital gains made by companies on the disposal of assets are included in taxable income and subject to corporation tax. These gains are calculated separately but form part of the overall taxable profit for the accounting period.
Rental income earned by a company is generally included in taxable income and subject to corporation tax. This applies whether the property is in the UK or overseas, subject to any relevant reliefs or deductions.
Some income may be exempt or not taxable, depending on HMRC rules and reliefs. Examples include certain capital receipts, intra-group transactions in specific cases, or income offset by allowable losses and deductions.
Investment profits such as dividends (in some cases), interest, and gains on investments are included in taxable income, although certain exemptions or reliefs may apply depending on the source and structure of the investment.
Need Help Understanding What Counts as Taxable Profit?
Determining taxable income can be complex, especially when dealing with multiple revenue streams, accounting adjustments, and allowable deductions. Our team at Cigma Accounting provides clear, practical support to help you get your calculations right.
We help you reduce errors, stay compliant with HMRC requirements, and ensure your corporation tax position is always accurately reported.
Ensure Your Company Profits Are Correctly Calculated
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