Title: What expenses can I deduct in my personal taxation?

If you receive wage income, the Finnish Tax Administration automatically grants you a €750 deduction for income acquisition expenses. If your work-related expenses exceed €750 per year, you should report the full amount yourself in MyTax — do not subtract the €750 yourself.

For light entrepreneurs, the deduction rules depend on whether the invoicing service pays you wages or trade income. If you receive trade income, you must report your deductible expenses separately, even if they are less than €750.

Examples of deductible work-related expenses may include:

professional literature
tools, equipment and office supplies
computers and data connections used for work
workspace or home office expenses, when applicable
phone and telecommunication costs related to your work
travel expenses related to customer work or assignments
YEL insurance contributions, if you are responsible for paying them yourself

YEL contributions are tax-deductible after you have paid them, and you can estimate them already when applying for a new tax card.

Remember to keep receipts and records of your expenses. You do not need to attach receipts to your tax return, but the Tax Administration may ask for them later.

Read more from the Finnish Tax Administration:
Finnish Tax Administration: Travel expenses and other deductions — light entrepreneurship
Finnish Tax Administration: Expenses for the production of income