One of the most significant advantages of investing through a limited company — beyond the Section 24 exemption covered earlier in this series — is the ability to deduct a wider and more straightforward range of business expenses before calculating your taxable profit. Understanding what qualifies as an allowable expense, and what does not, is fundamental to running your property company efficiently. This article covers the key expense categories relevant to property investment companies and flags where the rules require careful attention.
Why Expenses Matter More in a Ltd Company
In a limited company, every pound of allowable expense reduces your taxable profit before Corporation Tax is applied. At a 19% Corporation Tax rate, every £1,000 of legitimate expense saves you £190 in tax. Over a portfolio of multiple properties, with multiple expense lines running each year, the cumulative effect is substantial.
This is in stark contrast to the personal name position under Section 24, where mortgage interest — your largest expense — is no longer deductible at all, and you are taxed on gross rental income instead. In a company, there is no Section 24 restriction. You deduct what you genuinely spend on running the business, and you pay tax on what is left.
This is in stark contrast to the personal name position under Section 24, where mortgage interest — your largest expense — is no longer deductible at all, and you are taxed on gross rental income instead. In a company, there is no Section 24 restriction. You deduct what you genuinely spend on running the business, and you pay tax on what is left.
Core Allowable Expenses
1. Mortgage Interest
Unlike personal name landlords, limited companies can deduct 100% of their mortgage interest as an allowable expense. This is the most significant single expense for most property investors and the primary reason why a limited company is so much more tax-efficient for higher-rate taxpayers. The interest is deducted in full before Corporation Tax is calculated.
2. Letting and Management Agent Fees
If you use a letting agent to find tenants, manage the property, or both, their fees are fully deductible. Management fees typically range from 8–15% of monthly rent. These are a direct cost of generating your rental income and HMRC treats them as allowable.
3. Repairs and Maintenance
Genuine repairs — work that restores a property to its previous condition without improving it — are allowable. Replacing a broken boiler, fixing a leaking roof, repairing a window: these are revenue expenses and they reduce your taxable profit.
The distinction that matters here is between repair (allowable) and improvement (capital). If you are replacing a standard bathroom with a standard bathroom, that is a repair. If you are upgrading from a basic bathroom to a high-end en suite that increases the value of the property, HMRC may treat that as capital expenditure, which is treated differently for tax purposes. Your accountant can advise on the correct classification for specific works.
4. Insurance
Buildings insurance, landlord insurance, and contents insurance (where the landlord provides contents) are all allowable expenses. Keep your insurance policies organised and ensure they are in the company name where the property is owned by the company.
5. Professional Fees
Accountancy fees, legal fees related to the management of existing tenancies (not the acquisition of a property), and professional advice costs relating to running the business are allowable. Legal fees for acquiring a property are capital costs rather than revenue costs and are treated differently — they form part of the acquisition cost of the asset.
6. Mortgage Broker Fees
Broker fees paid in connection with obtaining finance for a property held by the company are generally an allowable business expense. As with all expense claims, keep receipts and ensure the cost is clearly related to the company's property business.
7. Travel Costs
Travel costs incurred specifically for business purposes — visiting a property you own for inspection, attending a meeting with your letting agent, travelling to meet a contractor at the property — can be claimed as an allowable expense. Personal travel cannot be mixed in. Again, keep records.
8. Advertising Costs
The cost of advertising properties to let — whether through Rightmove, Zoopla, a local letting agent's marketing, or elsewhere — is an allowable expense.
9. Utilities and Council Tax During Voids
If a property is empty and the company is meeting utility costs or council tax during a void period, these can be allowable expenses of the business. Check the specific circumstances with your accountant.
What You Cannot Deduct
Not everything associated with a property is a deductible expense, and it is important to understand the categories that fall outside the allowable expense rules.
Capital Expenditure
Personal Expenses
Fines and Penalties
Capital Expenditure
- Improvements that enhance the value of the property — an extension, a loft conversion, a significant upgrade that goes beyond restoring the property to its previous condition — are capital expenditure. They are not deductible against rental income in the year they are incurred. Instead, they form part of the base cost of the asset and may be relevant when calculating any gain on disposal. Capital allowances rules also apply in some circumstances. This is an area where your accountant's guidance is essential.
Personal Expenses
- This one sounds obvious but it is where problems arise if accounts are not kept cleanly. Personal meals, personal travel, personal purchases that are not related to the property business — none of these are allowable. If personal and business finances are mixed through the same account, HMRC has the right to challenge any expense that cannot be clearly attributed to the business. This is exactly why keeping a dedicated business bank account is non-negotiable, as emphasised in the JPU lesson structure from day one.
Fines and Penalties
- HMRC does not allow tax deductions for fines, penalties, or costs that arise from illegal activity. A fine for a licensing breach, for example, cannot be deducted as a business expense.
Record-Keeping: The Foundation of Everything
The allowable expense rules only work in your favour if you can evidence the costs you are claiming. HMRC can open an enquiry into any tax return and ask you to substantiate every deduction. If you cannot produce receipts, invoices, bank statements, or other evidence, the expense may be disallowed.
The practical standard to aim for is this: every business expense that passes through your company bank account should have a corresponding record. Use accounting software — Xero, QuickBooks, FreeAgent, and others all integrate with business bank accounts and make this straightforward. Your accountant can advise on the best option for the size and complexity of your portfolio.
The practical standard to aim for is this: every business expense that passes through your company bank account should have a corresponding record. Use accounting software — Xero, QuickBooks, FreeAgent, and others all integrate with business bank accounts and make this straightforward. Your accountant can advise on the best option for the size and complexity of your portfolio.
The Role of Your Accountant
A property-specialist accountant is not a luxury for a limited company property investor — it is a necessary cost of running the business efficiently. They will ensure your expense classifications are correct, your Corporation Tax return accurately reflects your deductible costs, and that you are not missing legitimate deductions that reduce your tax bill. The cost of a good accountant is itself an allowable expense. And in most cases, the tax saving they generate will comfortably exceed their fee.
Key Takeaway
- Limited companies can deduct 100% of mortgage interest — unlike personal name landlords under Section 24.
- Management fees, repairs, insurance, professional fees, and broker fees are all allowable.
- The key distinction is repair (allowable) vs improvement (capital — treated differently).
- Personal expenses mixed with business expenses create HMRC risk.
- Use dedicated accounting software and a property-specialist accountant from the start.
