Deductible expenses for self-employed individuals: a practical overview
04/06/2025
Smart entrepreneurs keep their tax matters in order. By making optimal use of deductible expenses, you retain more money for what truly matters: growing your business. But which expenses can you actually deduct? In this blog, we provide an overview of the main deductible costs.

The golden rule: business-related = deductible
The principle is simple: expenses incurred for your business are deductible. If you use something both for your business and privately (such as your smartphone), you may only deduct the business portion. In case of an audit, you must be able to justify your percentages, so keep them realistic.
Your deductible expenses at a glance
· Transport costs
The tax authorities are strict regarding car expenses, but more generous with public transport and cycling. From fuel to train tickets: this is how you optimise your mobility-related deductions. Read more about transport costs
· Workspace costs
Do you work from home? Then part of your housing costs is deductible. From electricity to mortgage interest: calculate your percentage based on the surface area of your workspace. Read more about workspace costs
· Phone and internet
Your smartphone and internet subscription are essential tools in your entrepreneurial toolkit. Your percentage of professional use determines how much you can deduct. Read all about it here!
Read more about telecom
· Office supplies and IT
From paperclips to software: everything that keeps your workspace running can be deducted. Should you expense it immediately or depreciate it over several years? We take a closer look at the best approach!
Read more about office and IT costs
· Networking and representation
Business lunch or client gift: investing in relationships is fiscally interesting, although often only partially deductible. Discover here how to maximise your advantage.
Read more about representation expenses
· Professional services
From accounting to insurance: the costs that support your business are usually 100% deductible. Yes, including your PIA Go! subscription!
Read more about professional services
· Marketing and promotion
Website, flyers, online ads? Fully deductible! Everything that puts your brand in the spotlight can be deducted—and we’re happy to explain how.
Read more about marketing costs
· Administrative costs
The paperwork of entrepreneurship: from company registration to VAT administration. These mandatory costs are fully deductible.
Read more about administrative costs
Note! / VAT deductibility vs. personal income tax
The rules for VAT deduction are not always the same as those for personal income tax. An expense can sometimes be fully deductible for income tax, but only partially or not at all for VAT, or vice versa.
PIA Go! All the tax benefits, without the administrative burden
At PIA Go!, we understand that tax rules can be overwhelming. That’s why our PIA accountants help you correctly classify your expenses and calculate the right deduction percentages. This ensures that you are always compliant with the legislation while optimising your tax benefits.
Want to maximise deductible expenses for your specific situation? Schedule a non-binding video meeting today. CONTACT US

reviewed by Tom Castelein, Personal Income Tax Expert.