Business Travel Expenses in the UK: What You Can and Can’t Claim

If you’re running a business in the UK, claiming travel expenses correctly can reduce your tax bill but getting it wrong can lead to HMRC challenges, penalties, and extra tax. Many business owners are unsure where HMRC draws the line between allowable business travel and non-allowable personal journeys.

In this guide, we explain how to claim travel expenses as a business expense in the UK, what HMRC allows, what evidence you need to keep, and the most common mistakes to avoid. Whether you’re a sole trader, partnership, or limited company director, this article will help you stay compliant while claiming everything you’re entitled to.

Travel is one of the most misunderstood business expenses in the UK. Many business owners either claim too little and overpay tax, or claim the wrong things and risk problems with HMRC.

The rule itself is simple, if the travel is genuinely for your business, it’s usually allowable. If it isn’t, it won’t be. The difficulty is knowing where HMRC draws the line, especially when trips involve meetings, conferences, overnight stays, or a mix of business and personal time.

This guide explains how travel expenses really work, using practical examples so you can see what does and doesn’t count.

What Counts as Business Travel for HMRC?

HMRC takes a common-sense approach to travel expenses. If the purpose of the journey is to carry out your business activities, then the related costs can normally be claimed.

For example, if you’re travelling to:

• Attend multiple client meetings

• Visit a supplier or business partner

• Speak at or attend a conference

• Work temporarily at a different location

Then the travel itself is part of running your business. In those cases, costs such as transport, accommodation (if needed), and reasonable food while travelling can usually be treated as allowable business expenses.

The key point is intention. The trip must exist because of the business. If the business activity didn’t happen, the trip wouldn’t either.

Claiming Travel, Accommodation, and Food While Working Away

If you’re travelling for business and the trip requires you to be away from home, HMRC generally allows you to claim:

• Travel costs (train, fuel, parking, flights, taxis)

• Overnight accommodation

• Meals and subsistence while you’re away

For example, if you have four meetings over a couple of days in another city, staying overnight makes sense. In that situation, claiming the hotel, transport, and food during the trip is usually acceptable, because those costs arise directly from the business travel.

Even small costs that help you carry out the trip such as food while travelling or basic necessities while away are normally fine, as long as they’re reasonable and clearly linked to the business journey.

When Business Travel Becomes Personal

Where people often get caught out is when business travel starts to overlap with personal time.

A good example is conferences. If you travel to a conference for your business, the travel and accommodation relating to the conference days are normally allowable. But if you then extend the trip into a personal holiday, HMRC will expect a clear split.

For instance:

• Attending a one-day conference ✔

• Extending the stay for a family holiday ✖

In that situation, HMRC would not allow the additional hotel nights, family travel costs, or personal expenses. Only the part of the trip that relates directly to the business activity can be claimed.

Taking your partner or family along does not automatically make a trip disallowable, but their costs are personal and cannot be claimed. HMRC looks at whether the business would have paid for the trip anyway, without the personal element.

Mileage and Using Your Own Vehicle for Business

If you use your own car or van for business travel, HMRC allows you to claim mileage instead of tracking individual fuel and running costs. This covers things like fuel, servicing, insurance, and general wear and tear. HMRC sets approved mileage rates, which are currently 45p per mile for the first 10,000 business miles in a tax year and 25p per mile thereafter. To support a mileage claim, you must keep accurate records showing the date of the journey, where you travelled to and from, how many miles were covered, and the business reason for the trip. Without a proper mileage log, HMRC may disallow the claim, even if the travel itself was genuinely for business purposes.

Who Can Claim Business Travel Expenses?

Travel expense rules apply to most UK business structures, including sole traders, partnerships, and limited companies. Sole traders and partners usually claim allowable travel expenses through their Self Assessment tax returns, reducing their taxable profits. For limited companies, travel expenses can be claimed where directors or employees incur costs while travelling for business, either by being reimbursed or paid directly by the company. In all cases, the journey must be necessary for the business and must not be ordinary commuting to a permanent place of work. The same core principle applies regardless of structure: the travel must exist because of the business.

What Evidence Do You Need to Support Travel Expense Claims?

When it comes to travel expenses, HMRC is usually more interested in why the cost was incurred than how much it was. You should always be able to demonstrate the business purpose of a trip and support the claim with evidence such as receipts, invoices, mileage logs, and booking confirmations. Keeping clear records makes it much easier to justify claims if HMRC ever raises questions and helps avoid expenses being disallowed due to lack of proof. Even reasonable and legitimate costs can be rejected if there is no supporting evidence to show they relate directly to business activity.

Common Travel Expense Mistakes HMRC Challenges

Many issues with travel expense claims arise from simple misunderstandings rather than deliberate errors. Common mistakes include claiming travel to a normal place of work, claiming the full cost of trips that include personal or holiday elements, and attempting to claim expenses for partners or family members. Poor record keeping is another frequent problem, particularly where mileage logs are incomplete or receipts are missing. These errors can lead to higher tax bills, penalties, and unnecessary stress, even when the original trip involved genuine business travel.

How We Help Clients Get This Right

Travel expenses are an area where careful advice makes a real difference. As accountants for UK limited companies, partnerships, and sole traders, we help clients:

• Understand which trips qualify as business travel

• Split business and personal costs correctly

• Keep HMRC-compliant records and mileage logs

• Claim the right expenses without pushing boundaries

That way, you reduce your tax bill without increasing risk.

Final Thought

If you’re unsure whether your travel costs are allowable, or you want confidence that you’re claiming expenses correctly without pushing HMRC boundaries, professional advice makes a real difference.

At Martlet & Co, we help UK limited companies, partnerships, and sole traders understand exactly what they can claim, keep compliant records, and avoid costly mistakes. If you want clarity, peace of mind, and tax-efficient expense claims, get in touch today to see how we can support your business.