Understanding Mileage Claims for Builders
For builders, contractors, and tradespeople operating as sole traders or through their own limited companies, vehicle travel is a fundamental part of the job. Travelling between sites, suppliers, and client meetings generates significant costs. The good news is that HMRC allows you to claim tax relief on these business journeys, effectively reducing your taxable profit. Understanding what mileage you can claim is therefore a crucial element of tax planning for any construction professional. Getting it right puts money back in your pocket, while errors can lead to missed claims or HMRC compliance issues.
The system is based on HMRC's Approved Mileage Allowance Payments (AMAP). Instead of tracking complex actual costs for fuel, insurance, servicing, and depreciation, you can use these simplified flat rates. For the 2024/25 tax year, the rates are 45p per mile for the first 10,000 business miles, and 25p per mile for any business miles thereafter. These rates are designed to cover all running costs of a car or van. Crucially, you can claim this regardless of whether you use your own vehicle or one you've hired.
What Qualifies as a Business Journey?
Not all travel from home counts. To understand what mileage builders can claim, you must distinguish between different types of travel. The key principle is travel "in the performance of your duties."
- Travel to a Temporary Workplace: This is your main claim. If you travel to a construction site or client's property that is a temporary workplace (i.e., you expect to work there for less than 24 months), the entire journey from your home (or any other starting point) is claimable. For most builders moving between different jobs, this is the standard.
- Travel Between Workplaces: Driving from one site to another during the day is fully claimable.
- Travel for Supplies: Trips to merchants, builders' yards, or tool hire shops specifically for business materials are claimable.
- Travel to Meetings: Visiting a client, architect, or surveyor for a business meeting qualifies.
What's not claimable? Your regular commute to a permanent workplace. If you have a yard or office that is your base of operations, travel from home to that base is considered private commuting.
Calculating Your Mileage Claim: A Practical Example
Let's put the rates into practice. Imagine a self-employed builder, Sarah. In the 2024/25 tax year, she logs 8,500 miles travelling to various sites (all temporary workplaces). She also drives 500 miles for trips to suppliers and 1,200 miles between sites during the same day.
Her total business miles are 10,200 (8,500 + 500 + 1,200). Her claim is calculated as follows:
- First 10,000 miles @ 45p = £4,500
- Next 200 miles @ 25p = £50
- Total Mileage Allowance Claim: £4,550
This £4,550 is deducted from her business's taxable profit. If she is a basic rate taxpayer (20% in 2024/25), this claim saves her £910 in income tax. If she operates through a limited company, the company can pay her this tax-free amount as a mileage allowance, saving both corporation tax and personal tax. Manually tracking and calculating this across a year is prone to error. This is where a dedicated tax calculator within a tax planning platform becomes invaluable, ensuring every penny is captured correctly.
Using a Limited Company vs. Being a Sole Trader
The mechanism for claiming differs based on your business structure, but the core rates remain the same.
Sole Traders/Partnerships: You claim the allowance as an expense in your Self Assessment tax return. The total claim reduces your net profit, thereby reducing your Income Tax and National Insurance liability. You simply need to keep a detailed mileage log as evidence.
Limited Company Directors/Employees: If you use your personal car for company business, your company can reimburse you at the AMAP rates (45p/25p) tax-free. If the company pays you less than the AMAP rates, you can claim tax relief on the difference via your Self Assessment. If it pays you more, the excess is treated as a taxable benefit. For company-owned vans, different, simpler flat rates apply for fuel-only reimbursement. Managing these nuances is a core function of modern tax planning software, which can handle the different rules for different entity types.
The Critical Importance of Record-Keeping
HMRC can ask to see evidence of your mileage claims for up to six years after the end of the tax year. A simple, contemporaneous log is your best defence. For each journey, note the date, destination, business purpose, and start/end mileage. A dedicated notebook in your van or a mobile app is ideal. The purpose is to demonstrate the claim is genuine and wholly for business. Without records, HMRC may disallow the entire expense, leading to additional tax, penalties, and interest.
This administrative burden is a major pain point for busy builders. Manually consolidating scribbled notes at year-end is time-consuming and risky. Integrating mileage tracking with your overall financial data is where technology truly shines, automating the process and creating a clear audit trail for HMRC compliance.
How Tax Planning Software Transforms Mileage Claims
This is the modern solution to the age-old problem of "what mileage can builders claim?" Advanced tax planning software does more than just calculate; it streamlines the entire process.
- Automated Tracking & Logs: Mobile apps can use GPS to automatically log journeys, categorise them, and calculate the claim in real-time, syncing with your main account.
- Accurate, Real-Time Calculations: The software applies the correct HMRC rates (45p/25p) automatically, tracks your 10,000-mile threshold, and updates your tax liability instantly. This gives you a live view of your tax position.
- Scenario Planning: What if you buy a new van? What if a job becomes permanent? Good software allows you to model these scenarios to see the tax impact before you make a decision.
- Compliance & Reporting: It generates HMRC-friendly reports from your digital logs, making year-end filing and any enquiries straightforward. Deadlines for Self Assessment (31 January) and company accounts are managed with reminders.
By using a platform like TaxPlan, builders shift from reactive, messy paperwork to proactive, optimised tax planning. You're not just claiming what you remember; you're claiming everything you're entitled to, accurately and efficiently. This is a fundamental part of optimizing your tax position as a tradesperson.
Actionable Steps to Maximise Your Claim
1. Start Logging Today: Don't wait until the new tax year. Begin a disciplined log for all business travel immediately, using an app or notebook.
2. Understand Your Trips: Classify each journey correctly – temporary workplace, between sites, or supplies.
3. Choose Your Method: Decide if the simplified AMAP rate (45p/25p) is better for you than claiming actual costs (this is rare for cars/vans).
4. Use Technology: Investigate tax planning software that includes mileage tracking. The time saved and accuracy gained often far outweigh the cost.
5. Review Annually: Before filing your return or company accounts, ensure your total claim is accurately calculated and fully documented.
Conclusion: Drive Down Your Tax Bill
Understanding what mileage builders can claim is a non-negotiable part of running a profitable trade business. The HMRC AMAP rates provide a simple, generous method to gain significant tax relief on an unavoidable cost. The challenge has always been in the consistent tracking and accurate calculation. Today, that challenge is solved by technology. By leveraging a modern tax planning platform, you can ensure every business mile is accounted for, maximise your legitimate expenses, and keep your tax liability to a minimum. It turns a complex administrative task into a seamless part of your workflow, giving you more time to focus on the build and more confidence in your financial position.
