Finnish investors usually do not struggle with the headline tax rate itself. The practical friction is understanding how P2P income fits inside capital income, how losses or defaults should be documented, and how foreign withholding tax interacts with the annual tax return when the platform operates outside Finland.

How Finland usually taxes P2P income

In many standard cases, P2P interest is treated as capital income. That usually means the familiar Finnish capital-income rates apply, so the effective burden can change depending on how much total capital income you recognize during the year rather than on a platform-specific flat tax.

What investors usually need to report

For most investors, the key step is checking the annual tax return carefully and making sure foreign platform income is correctly reflected in the capital-income section. If the pre-completed return misses interest, recoveries, defaults, or loan-sale effects, the investor normally has to correct the filing instead of assuming the platform has already handled everything.

Losses, defaults, and foreign withholding tax

The common traps are treating every default as immediately deductible, forgetting that recoveries can matter later, and reporting only net cash flows instead of keeping a clean record of gross income and foreign tax withheld. Where foreign withholding tax applies, Finland may allow relief within normal treaty and domestic limits, but you still need usable documentation from the platform.

Bottom line

For most Finnish investors, the practical checklist is to classify P2P returns under capital income, review the annual return closely, and keep evidence for losses, recoveries, and foreign tax paid. If your portfolio spans multiple foreign P2P platforms, accurate records matter just as much as headline yield.

Disclaimer: This article provides general information only and does not constitute tax advice. Always consult a qualified Finnish tax adviser for guidance tailored to your situation.