That receipt shoved in a coat pocket, the software subscription on your company card, the train fare to meet a client – these are exactly the kinds of costs that raise one of the most common finance questions for founders: which business expenses you can claim, and which ones could create trouble later.
For SME owners and self-employed professionals, this is not just an admin issue. Claiming the right expenses affects taxable profit, cash flow and the quality of your records if the tax authority asks questions. Get it right and you keep more money in the business. Get it wrong and a routine filing can turn into an avoidable correction, penalty or long exchange with your accountant.
What counts as business expenses you can claim?
At the simplest level, a business expense is a cost incurred wholly and exclusively for running your business. That principle is straightforward on paper, but in practice many costs sit in a grey area. A laptop used only for work is usually easier to justify than a mobile phone used for both client calls and personal messages. A train ticket to a supplier meeting is more clearly allowable than a meal where the business purpose is vague.
This is why context matters. Tax rules differ by country, and readers operating in the Netherlands or elsewhere in Europe should always check local treatment, especially where VAT, mileage, home office rules and director expenses are concerned. But the broad categories remain fairly consistent, and they provide a useful working framework for most businesses.
The main business expenses you can claim
Premises costs are one of the clearest examples. If you rent an office, coworking desk, studio or storage space for the business, those fees are typically claimable. The same applies to utilities, business rates where relevant, cleaning, security and maintenance tied to the workspace. For office-based businesses, these costs are often substantial, which makes accurate categorisation worth the effort.
Equipment is another major category. Computers, monitors, printers, desks, office chairs and phones used for business are commonly claimable, although the treatment can vary depending on whether the item is treated as an everyday running cost or a capital asset. The distinction matters because some purchases are deducted differently over time rather than in one go.
Software and digital services are increasingly central to day-to-day operations. Accounting platforms, CRM tools, video conferencing subscriptions, cloud storage, cybersecurity services and project management software will usually qualify if they are genuinely for business use. This is one area where modern SMEs often spend more than they realise, especially when small monthly subscriptions accumulate across teams.
Professional services also sit firmly within normal business expenditure. Accountancy fees, legal advice, payroll support, consultants, business banking charges and insurance premiums are usually claimable when connected to the operation of the business. If the advice relates to personal matters rather than commercial activity, that is where the line starts to shift.
Travel expenses are often claimed, but they are also commonly misunderstood. Business travel such as train fares, flights, taxis, parking and mileage for work journeys may be allowable. Ordinary commuting, however, is often treated differently from travel undertaken wholly for business purposes. The distinction between travelling to a regular workplace and travelling to a temporary meeting or site can be significant.
Marketing and sales costs are generally straightforward. Website hosting, branding work, online adverts, printed materials, trade show fees and sponsorships connected to business promotion will usually count. If the expense is clearly aimed at generating revenue or supporting commercial visibility, it is often easier to justify.
Staff-related costs are usually claimable too. Salaries, pension contributions, training, recruitment fees and some employee welfare costs may all fall within allowable expenditure, though entertainment and perks can have special rules. This is an area where growing businesses should be particularly careful, because what feels like a normal team cost is not always treated simply for tax purposes.
Where businesses often get caught out
The problem is rarely with obvious costs. It is the mixed-use expenses that create confusion.
Home office costs
If you work from home, some expenses may be claimable, but the approach depends on how the space is used and what local rules allow. A portion of internet, heating, electricity and rent or mortgage-related costs may be considered, but only where there is a defensible business element. If the kitchen table doubles as your office, the claim may be more limited than if you have a dedicated room used mainly for work.
This is one of those areas where being aggressive rarely pays. A modest, well-documented claim is usually easier to support than an ambitious allocation with no clear method behind it.
Meals and entertaining
Business owners often assume any meal with a client is claimable. Sometimes it is, sometimes it is restricted, and sometimes the VAT treatment differs from the underlying expense treatment. Staff meals, subsistence while travelling and client entertainment can all be treated differently depending on the jurisdiction.
The safest approach is to record who attended, the business purpose and whether the cost related to staff, clients or suppliers. Without that detail, even a genuine business expense can become difficult to defend.
Clothing
A suit bought to look professional is not always treated as a business expense, even if you would never wear it casually. Specialist protective clothing, uniforms and branded workwear are easier to justify because they are tied directly to the business role. Everyday clothing, however business-like, is often a red flag.
Personal and business overlap
Phones, cars and home internet are common examples of dual-use spending. If there is both business and personal benefit, only the business proportion is typically claimable. That means estimates need to be reasonable and consistent. Guesswork after year-end is a weak position to be in.
Good records matter as much as the expense itself
Even legitimate business expenses you can claim may be challenged if the paperwork is poor. Keeping the invoice is the minimum. In many cases, you also need to show what the purchase was for, when it was made and how it relates to the business.
Digital bookkeeping has made this easier, but only if the process is disciplined. Uploading receipts as they happen, using clear categories and reconciling card statements regularly will save time and reduce errors. It also gives management a more accurate view of where money is actually going.
For founders trying to control overheads, that visibility has value beyond tax. You may discover software duplication, overspending on travel or workspace costs that no longer reflect how the team works.
Should you claim everything you are entitled to?
In principle, yes – but with judgement.
There is no benefit in paying more tax than necessary because you were too cautious to claim legitimate costs. At the same time, not every technically arguable expense is worth the compliance risk, especially if the amount is small and the business purpose is hard to evidence.
A sensible rule is this: if you can explain the expense clearly, document it properly and show that it was genuinely incurred for the business, it is usually worth claiming. If your explanation relies on stretching definitions, it may be better to leave it out or seek advice before including it.
A practical approach for SMEs and founders
The most efficient businesses do not wait until filing season to sort this out. They set a simple expense policy, even if the company only has a handful of people. That policy should cover what can be bought, what evidence is required, how mileage or travel is recorded and when approvals are needed.
For owner-managed businesses, this matters just as much. The line between personal and business spending is often blurred in the early stages, particularly when founders use personal cards, work from home or mix networking with social activity. Cleaner systems make for better decisions and fewer tax surprises.
If you operate across borders, use shared workspaces in different countries or employ remote staff, the detail becomes more important still. VAT recovery, employee reimbursement rules and permanent establishment questions can all affect how an expense should be treated. What looks routine in one country may not be in another.
Claiming expenses is not about pushing the boundaries. It is about recognising the real cost of running a business and recording it properly. The businesses that do this well tend to have better reporting, stronger cash discipline and fewer year-end headaches. That is a worthwhile outcome, whether you are running a one-person consultancy or scaling an office-based team across Europe.
