By
August 11, 2026
What Are Allowable Expenses for a UK Limited Company?
If you run a UK limited company, understanding allowable expenses can help you calculate your profits correctly and avoid paying more Corporation Tax than necessary.
In simple terms, allowable expenses are qualifying business costs that can be deducted when calculating your company's taxable profits.
For example, if your limited company earns £100,000 and has £30,000 of qualifying expenses, those expenses can generally be taken into account when calculating the company's profit for Corporation Tax purposes.
However, not everything paid for by a company is automatically an allowable expense. Different rules apply to different types of expenditure, and some costs are specifically restricted or disallowed.
This guide explains common allowable expenses for UK limited companies and what directors should consider when claiming them.
For Corporation Tax purposes, business expenses generally need to satisfy the relevant tax rules to be deductible.
A key principle is that expenses should be incurred wholly and exclusively for the purposes of the company's trade.
In practical terms, this means the expense should have a genuine business purpose.
Common examples can include:
However, specific rules and exceptions can apply.
Allowable expenses can reduce the profits on which Corporation Tax is calculated.
Consider a simplified example.
A UK limited company generates:
Business income: £100,000
It incurs:
Allowable business expenses: £40,000
This leaves:
Profit before further tax adjustments: £60,000
The company does not simply calculate Corporation Tax on its £100,000 turnover.
Instead, allowable expenses and other relevant tax adjustments are considered when determining the company's taxable profits.
The final Corporation Tax calculation can differ from this simplified example because accounting profits may need to be adjusted under tax rules.
Many everyday office costs can qualify as business expenses.
These could include:
Where something is used for both business and personal purposes, additional rules may apply.
Keeping business and personal expenditure separate makes record keeping considerably easier.
If your company operates from an office, shop, warehouse or other commercial premises, certain associated costs may be deductible.
Examples can include:
The treatment of purchasing or significantly improving a property is different because these costs may be capital rather than ordinary business expenses.
The cost of employing staff can generally be taken into account when calculating company profits, subject to the relevant rules.
Employment costs can include:
Directors' salaries can also normally be a company expense when properly structured and reported.
Dividends are different.
Dividends paid to shareholders are not normally deductible when calculating Corporation Tax profits.
Professional services used for genuine business purposes can often qualify as expenses.
These might include:
However, not every legal or professional expense is automatically deductible.
The tax treatment can depend on why the cost was incurred and whether it relates to revenue or capital expenditure.
Costs incurred promoting your business can generally qualify as business expenses.
Examples include:
These costs should relate to promoting the company's business.
Modern companies can spend a significant amount on digital services.
Potentially deductible costs can include:
Some website development and software expenditure may require different accounting or tax treatment where it is capital in nature.
Insurance purchased for the purposes of the business can generally qualify.
Examples could include:
Personal insurance policies generally should not be treated as company expenses simply because the company pays for them.
Companies selling physical products will commonly incur costs purchasing goods for resale.
These can include:
Accounting rules regarding stock and cost of sales determine when these costs are recognised when calculating profit.
Certain travel expenses incurred for business purposes may be allowable.
Examples can include qualifying:
However, ordinary commuting between home and a permanent workplace is generally treated differently.
Travel rules can become complicated where directors work from multiple locations or travel internationally.
If a director or employee uses their own vehicle for qualifying business journeys, the company may be able to reimburse mileage under HMRC's approved mileage arrangements.
The rules distinguish qualifying business travel from ordinary commuting.
Accurate mileage records should be maintained showing details such as:
Where the company owns or leases vehicles, various costs may potentially be deductible.
These can include certain:
However, cars are subject to specific tax rules.
Capital allowances, emissions, private use and Benefit in Kind rules can all affect the tax position.
Employee and director training costs may qualify where the training is relevant to the company's existing business activities.
For example, training that develops skills required for an existing role may be treated differently from expenditure that creates an entirely new trade or profession.
The purpose and nature of the training therefore matter.
A mobile phone contract taken out directly in the company's name for business purposes may potentially be treated as a company expense, subject to the relevant rules.
Internet and telephone expenses may also be deductible where they relate to business use.
Personal contracts and mixed business/private use can require more careful consideration.
Directors who work from home may be able to claim or receive reimbursement for certain additional household costs attributable to business use.
HMRC rules determine what can be claimed and how much.
Another possibility is for the company to have a formal arrangement to use part of the director's home, although this can create additional tax and legal considerations.
For many small companies, keeping home-working arrangements straightforward may be preferable.
Certain financial costs incurred for business purposes can potentially be deductible.
These may include:
Specific rules can apply to financing and interest expenses, particularly for more complex companies.
Certain professional subscriptions may qualify where they are directly relevant to the company's business.
Examples could include subscriptions to approved professional organisations or trade bodies.
General personal memberships are unlikely to qualify simply because the director believes they are useful for business.
Companies often purchase equipment such as:
These purchases are not always treated as ordinary revenue expenses.
Instead, qualifying capital expenditure may receive tax relief through capital allowances or other applicable rules.
This can still reduce taxable profits, but the mechanism is different from deducting an ordinary operating expense.
Some business gifts can qualify for tax relief, but restrictions apply.
Gifts to customers may potentially qualify in certain circumstances, including where they meet specific conditions relating to advertising and value.
Other gifts may be disallowed.
Businesses should therefore check the applicable rules before assuming that gifts to customers or suppliers are deductible.
This is one of the most commonly misunderstood expenses.
A company may legitimately pay for entertaining clients or potential customers, but business entertainment is generally not deductible when calculating taxable profits for Corporation Tax.
The accounting records should therefore distinguish entertainment from deductible business expenses.
Different rules may apply to certain staff entertainment.
Companies can sometimes receive favourable tax treatment for qualifying annual staff events, subject to HMRC's conditions.
The rules are different from client entertainment.
For example, an annual party available to employees may potentially fall within the relevant exemption where the conditions are satisfied.
Businesses should check the current limits and requirements before relying on an exemption.
Not every company payment reduces taxable profits.
Examples that may be disallowed or treated differently include:
If an expense has both personal and business elements, additional rules may determine whether any business portion is deductible.
A limited company is legally separate from its directors and shareholders.
Personal expenditure should therefore not simply be treated as a business expense.
If the company pays a director's personal expenses, the payment may need to be treated differently for accounting and tax purposes.
Depending on the circumstances, it could potentially create:
Accurate categorisation is important.
Your company should maintain adequate records supporting its income and expenditure.
Useful records can include:
Digital copies can make record keeping considerably easier.
The important thing is that the company can demonstrate what the expense was and why it was incurred.
Companies generally need to retain accounting records for at least six years from the end of the financial year they relate to, although records may need to be kept for longer in certain circumstances.
Good record keeping also makes it much easier to prepare annual accounts and Corporation Tax Returns.
Before claiming an expense, consider:
If you are unsure, check HMRC guidance or ask your accountant before claiming it.
A company can potentially deduct many costs incurred wholly and exclusively for its business, including qualifying office costs, salaries, advertising, insurance, professional fees, software and travel.
Specific rules apply to individual categories.
Allowable expenses can reduce the company's taxable profits, which can reduce the amount of Corporation Tax payable.
Sometimes. The tax treatment depends on why the food was purchased and the circumstances involved. Meals associated with qualifying business travel may be treated differently from ordinary personal meals.
Ordinary everyday clothing generally does not qualify simply because it is worn while working. Different rules may apply to uniforms, protective clothing and certain specialist clothing.
A laptop purchased genuinely for company business may qualify for tax relief, although the accounting and tax treatment may involve capital allowances rather than treating the entire purchase as an ordinary operating expense.
A company-provided mobile phone can potentially receive favourable tax treatment when the relevant conditions are satisfied. Personal contracts require different consideration.
No. Dividends paid to shareholders are generally distributions of company profits and are not deductible when calculating Corporation Tax.
Generally not for Corporation Tax purposes, even though the company may legitimately pay the expense.
Understanding allowable expenses for a UK limited company is an important part of managing Corporation Tax efficiently.
Your company does not normally pay Corporation Tax simply on its turnover. Instead, qualifying business expenses and other tax adjustments are taken into account when determining taxable profits.
Common allowable costs can include salaries, office expenses, advertising, insurance, software, professional fees, stock and qualifying business travel.
However, not every payment made by a limited company is tax deductible.
Personal expenses, dividends, client entertainment and certain other costs may be disallowed or subject to special tax rules.
Keep accurate records, retain invoices and receipts, and make sure each expense is correctly categorised. Where the treatment of an expense is unclear, check the latest HMRC guidance or consult a qualified accountant or tax adviser.
This article provides general information about allowable expenses and Corporation Tax for UK limited companies. It does not constitute tax, accounting or legal advice.
