Review your allowable expenses before 5 April and ensure you are not overpaying tax. Essential checklist for self employed individuals and landlords.
As the end of the tax year approaches, many taxpayers focus on submitting their Self Assessment return. However, one of the most common reasons people overpay tax is simply because they forget to claim all of their allowable expenses.
If you are self employed or a landlord, reviewing your expenses before 5 April can make a real difference to your final tax bill. If you need any help, Tax2u will guide you.
This simple year end checklist will help you understand what you can claim and how to make sure nothing is missed.
Why reviewing allowable expenses matters before the tax year ends
Allowable expenses reduce your taxable profit, which means you only pay tax on the income that remains after legitimate business costs are deducted.
Many taxpayers unintentionally overpay because they forget small but valid expenses throughout the year. When these costs are added together, the tax savings can be significant.
A quick review before the tax year ends gives you time to identify missing expenses and make sure your records are complete before preparing your Self Assessment tax return.
What HMRC considers allowable expenses
HMRC defines allowable expenses as costs that are wholly and exclusively for business purposes.
This means the expense must relate directly to running your business or managing your rental property.
Common allowable expenses include:
Office and business running costs
If you run a business, many everyday operating costs may be deductible, including:
• Office supplies such as stationery and printer ink
• Business phone and internet costs
• Software subscriptions used for work
• Professional services such as accountants or legal advice
Keeping clear records helps ensure these costs are properly claimed when preparing your tax return.
Travel and vehicle expenses
If you travel for business purposes, you may be able to claim expenses such as:
• Fuel for business journeys
• Parking fees and toll charges
• Public transport used for work travel
• Business mileage if using your personal vehicle
However, commuting between home and a permanent workplace is normally not allowable under HMRC rules.
Working from home expenses
Many self employed individuals now work from home.
If you use part of your home for business, HMRC allows you to claim a portion of household costs such as:
• Electricity and heating
• Broadband and phone usage
• Council tax or rent in some cases
You may claim either the simplified HMRC flat rate or calculate the actual proportion used for business.
Allowable expenses for landlords
Landlords can also reduce their tax liability by claiming legitimate rental property expenses.
Typical allowable expenses include:
• Letting agent fees
• Property maintenance and repairs
• Landlord insurance
• Safety certificates and inspections
• Replacement of domestic items such as appliances or furniture
It is important to note that property improvements or capital upgrades are treated differently and may not be claimed as regular expenses.
Year end allowable expenses checklist
Before 5 April, review your records and ask yourself the following questions:
• Have all business purchases been recorded
• Have travel and mileage logs been updated
• Have professional fees and subscriptions been included
• Have home working expenses been calculated correctly
• Have all property maintenance costs been recorded
This simple review can highlight missing expenses that could reduce your tax bill.
Common mistakes that lead to overpaying tax
Many taxpayers make small mistakes that result in paying more tax than necessary.
Common issues include:
• Forgetting small recurring expenses
• Mixing personal and business costs
• Losing receipts or records
• Not claiming home working costs
• Missing landlord maintenance expenses
Taking time to organise your records before the tax year ends can help avoid these problems.
How professional tax support can help
If you are unsure whether certain costs qualify as allowable expenses, it can be helpful to get professional guidance.
A tax specialist can review your records, identify missing deductions, and ensure your Self Assessment return is completed accurately according to HMRC requirements.
This not only reduces the risk of errors but also helps ensure you are not paying more tax than necessary.
FAQ about allowable expenses
What are allowable expenses for Self Assessment
Allowable expenses are business related costs that HMRC permits you to deduct from your income before calculating your taxable profit.
Can I claim expenses from previous years
You can amend previous Self Assessment returns within HMRC time limits if legitimate expenses were missed.
Do I need receipts for every expense
HMRC expects taxpayers to keep evidence such as receipts, invoices, or bank statements to support expense claims.
Can landlords claim mortgage payments
Mortgage interest may be eligible for tax relief, but the rules differ from normal expense deductions and are applied as a tax credit.
Final thoughts before 5 April
Reviewing your allowable expenses before the end of the tax year is one of the simplest ways to reduce your tax bill and avoid overpaying.
Many taxpayers discover missed expenses only after filing their return, when it is often too late to benefit fully from them.
Taking action now can ensure your records are accurate and your tax position is as efficient as possible.