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What Expenses Can I Really Claim as a Small Business?
Navigating the world of business expenses can feel overwhelming, but understanding what you can legitimately claim is crucial for managing your finances effectively. From office costs to travel expenses, knowing the rules helps you maximise your tax relief whilst staying compliant with HMRC regulations.
Tax Savings
Understanding Business Expenses: Why It Matters
Claiming allowable expenses reduces your taxable profit, which directly translates into real money saved on your tax bill. Understanding this fundamental principle is essential for every business owner who wants to operate efficiently and legally.
For instance, if your business generates a turnover of £40,000 and you've incurred £10,000 in legitimate business expenses, you'll only pay tax on the remaining £30,000 profit. This simple calculation demonstrates the significant impact proper expense management can have on your bottom line.

Key Rule: Only costs wholly and exclusively for business purposes qualify as allowable expenses. Mixed personal and business use requires careful apportionment.
£10K
Typical Annual Savings
Average tax relief for small businesses
100%
Business Use Required
For full expense deduction
Who This Applies To: Sole Traders, Partnerships & Limited Companies
Sole Traders
Claim allowable expenses directly on your Self Assessment tax return to reduce your Income Tax liability. You report your business income and expenses annually, with tax calculated on your net profit.
Partnerships
Similar to sole traders, partnerships claim expenses through Self Assessment. Each partner reports their share of profits after expenses, with the partnership filing a separate return showing the business's overall financial position.
Limited Companies
Limited companies deduct allowable expenses when calculating profit before Corporation Tax. The company files annual accounts and a Corporation Tax return, with stricter reporting requirements and different rules for certain expenses.
Understanding your business structure is crucial because different rules and allowances apply depending on how you're set up. Always ensure you're following the correct procedures for your specific situation.
Office Costs
Office and Premises Costs You Can Claim
Workspace Essentials
Running an office involves numerous day-to-day expenses that are fully claimable when used exclusively for business. These include stationery supplies, telephone bills, internet charges, and essential office equipment. If you operate from commercial premises, you can also claim heating, lighting, and business rates.
Home Office Claims
Working from home? You can claim a proportion of your household bills based on the size and business use of your workspace. Calculate the percentage of your home used for business and apply this to expenses like utilities, council tax, and mortgage interest or rent.
Business Premises
Rent, business rates, heating, lighting, cleaning, and security costs for dedicated commercial spaces.
Office Supplies
Stationery, printer ink, postage, telephone bills, and internet connections used for business.
Home Working
Proportionate household expenses or simplified flat rate of £6 per week for 25+ hours monthly use.
Travel and Vehicle Expenses
Travel expenses represent one of the most common areas for legitimate business claims, but they're also where many business owners make costly mistakes. Understanding what qualifies is essential for maximising your relief whilst staying compliant.
Business Mileage
Claim 45p per mile for the first 10,000 business miles, then 25p thereafter. This simplified rate covers fuel, insurance, servicing, and depreciation. Keep detailed mileage logs with dates, destinations, and business purposes.
Public Transport
Train tickets, bus fares, and Underground costs for business journeys are fully claimable. Remember to retain all receipts and tickets as proof of expenditure for HMRC.
Associated Costs
Parking fees, congestion charges, and tolls incurred during business travel. Hotel accommodation and meals whilst travelling overnight for business purposes are also allowable.

Important: Commuting from home to your regular workplace doesn't count as business travel. Only journeys to temporary workplaces, client meetings, or business events qualify.
For business vehicles, you can claim capital allowances which allow you to deduct a portion of the vehicle's cost from your profits. Cars, vans, motorcycles, and even bicycles used for business purposes may qualify for these allowances.
Staff and Subcontractor Costs
When you employ staff or engage subcontractors, the costs associated with these working relationships are generally allowable expenses. This represents a significant area of potential tax relief for growing businesses.
Salaries, wages, bonuses, and employee benefits all qualify as legitimate business expenses. Additionally, employer's National Insurance contributions and pension scheme payments made on behalf of your staff are fully deductible against your business profits.
Employee Costs
  • Salaries and wages
  • Bonuses and commissions
  • Employee benefits and perks
  • Staff training and development
Statutory Obligations
  • Employer's National Insurance
  • Workplace pension contributions
  • Statutory sick pay and maternity pay
  • Employee insurance policies
External Support
  • Subcontractor fees and invoices
  • Recruitment agency charges
  • Freelancer and consultant costs
  • Temporary staff expenses
Inventory
Stock, Materials, and Reselling Goods
If your business involves buying and selling goods or manufacturing products, the cost of stock and raw materials represents a major allowable expense. This includes the direct costs of goods you purchase for resale, as well as raw materials used in production or manufacturing processes.
What You Can Claim
  • Goods purchased specifically for resale to customers
  • Raw materials and components used in manufacturing
  • Packaging materials for your products
  • Direct costs of bringing goods to a saleable condition
Important Considerations
Only the business portion of mixed-use items can be claimed. If you purchase items that serve both personal and business purposes, you must apportion the cost appropriately and only claim the business element.
Keep detailed records of stock purchases, including invoices and delivery notes, to support your claims.
100%
Business Stock
Fully deductible when bought exclusively for resale
50%
Mixed Use
Example proportion you might claim on dual-purpose items
Marketing, Advertising, and Professional Development
Investing in your business's growth and visibility is essential, and fortunately, most marketing and development costs qualify as allowable expenses. From digital presence to traditional advertising, these investments in your business's future can reduce your tax bill.
Digital Presence
Website hosting and development costs, domain registration fees, and online advertising campaigns including Google Ads and social media promotion.
Skills Development
Training courses directly related to your business activities, professional qualifications, and industry-specific certifications that enhance your business capabilities.
Marketing Materials
Printed promotional materials, business cards, brochures, exhibition stand costs, and sponsorship of relevant industry events.
Website and Online Marketing
Advertising Campaigns
Professional Subscriptions
Business Training
Professional subscriptions to industry bodies and trade associations necessary for your business are also claimable, as are licenses required to operate legally in your sector.
Financial and Legal Expenses
Insurance Protection
Business insurance premiums including public liability, professional indemnity, and employer's liability coverage.
Banking Charges
Business bank account fees, transaction charges, and merchant service fees for card payments.
Borrowing Costs
Interest on business loans, overdrafts, and hire purchase agreements used for business purposes.
Running a business involves various financial and legal costs that protect your interests and ensure compliance. Fortunately, most of these professional expenses are allowable for tax purposes.
Legal fees related to business operations—such as contract reviews, debt recovery, and defending business-related legal claims—are generally claimable. However, legal costs for purchasing business assets are treated differently and may need to be added to the asset's cost for capital allowances purposes.
Accountancy and bookkeeping fees
Business insurance premiums
Bank charges and merchant fees
Interest on business borrowing
Legal fees for business matters
Best Practice
Keeping Records and Claiming Expenses Correctly
Maintaining accurate records isn't just good practice—it's a legal requirement. HMRC expects you to keep detailed documentation of all business income and expenses, and proper record-keeping protects you in the event of an enquiry whilst ensuring you claim everything you're entitled to.
Collect and Store
Keep all receipts, invoices, and bank statements. Store them systematically, either physically or using digital scanning and cloud storage solutions.
Record Details
Note the date, amount, supplier, and business purpose for each expense. This information is crucial if HMRC questions any claims.
Regular Review
Update your records weekly or monthly. Don't wait until year-end to sort through a shoebox of receipts—it's inefficient and increases error risk.
Annual Reporting
Report all allowable expenses on your Self Assessment tax return or in your company accounts, ensuring accuracy and completeness.
VAT Considerations
If you're VAT registered, you can reclaim VAT on business purchases. The amount you reclaim must be proportionate to your business use—if an item is used 60% for business and 40% personally, you can only reclaim 60% of the VAT.
Retention Requirements
Keep records for at least 5 years after the 31 January submission deadline of the relevant tax year. Limited companies must retain records for 6 years from the end of the accounting period.

Expert Advice: When in doubt about whether an expense is allowable, speak with a qualified accountant. It's better to ask first than face penalties later. Professional advice often pays for itself through legitimate tax savings you might have missed.