what do I fill in for the question about equity of my business

Equity comes from the most recently filed annual accounts

Enter the amount shown in the balance sheet under "equity": paid-up capital, reserves and retained earnings combined. That figure is on the balance sheet filed with the Chamber of Commerce, and it is also the amount that a customer asking this type of question wants to see — not an estimate, not an internal figure from an interim report, unless the question explicitly asks for that. If in doubt, check which annual accounts were most recently filed: at are the annual accounts of the enterprise filed? shows you how to verify that and what a customer can check with it.

If the enterprise has no filing obligation, or the most recent annual accounts have not yet been filed, there is no public figure to refer to. Answer then with what is available: a recent interim balance sheet, an audit report, or — if none of that is available — leave the field empty and provide an explanation in the comments field of the portal. Do not invent an amount and do not round upwards to appear "safe"; a customer asking this question often uses the figure together with other signals. For a question about financial health in a broader sense, for example from an insurance company, it rarely concerns equity alone — see insurer asks about our financial health what should I enter for what else is involved.

Where this follows from: Trade Register Act and CSRD

The obligation to file annual accounts derives from the Trade Register Act 2007, and that annual account contains the balance sheet on which equity is stated — that is the source where the figure comes from, not an estimate or internal report. For larger enterprises, an additional reporting obligation applies via Directive (EU) 2022/2464 (CSRD) that goes beyond the balance sheet figure alone, but for a simple question about the equity position in a customer's questionnaire, the filed annual accounts are usually the appropriate source. The Act on the Prevention of Money Laundering and Terrorist Financing is not the direct legal basis for the figure itself, but it does explain why banks and insurers ask these types of questions: the client due diligence they are required to perform.