Collecting an unpaid invoice in Finland step by step

The payment deadline has passed, but your client has not paid. Start with a reminder. If that does not resolve the problem, you can ask a collection agency to handle the invoice. Going to court and applying for enforcement are separate decisions you may need to make later.

These steps apply to ordinary invoices for work and services in Finland. Once the client pays the outstanding invoice and any valid interest and costs, the matter is settled. You do not have to go through every stage.

1. Check the payment and send a reminder

Make sure the invoice is correct, the client received it and the payment has not already arrived. Then send a polite reminder without adding a reminder fee. Include the invoice number, the outstanding amount and the date by which you are asking for payment. Attach the original invoice.

Allow enough time for the client to pay or respond. Reminders that carry a fee have additional conditions. Our detailed guide to overdue invoices explains the timing and fees for consumer and business clients and includes an email you can adapt.

2. Agree a payment plan if it would help

If the client agrees they owe the money but needs more time, you can agree a new payment date or payment in instalments. Confirm the dates, amounts and any interest by email. Keep track of whether each payment arrives.

If the client does not respond or misses the agreed payments, consider using a collection agency. A payment plan is an option, not a compulsory step before collection.

3. Hand the invoice over to a collection agency

Choose an agency and authorise it to collect the debt on your behalf. Give it:

• the client’s details and the unpaid invoice
• the contract or accepted quote, plus the client’s approval of the completed work
• the reminders you have sent and any replies
• details of payments already received and any payment arrangements.

A written agreement and confirmation that the client accepted the work help show why the money is owed. Arrange these before invoicing. See our guide to client contracts.

Check what the agency will charge you, including if it cannot recover the money. Its fee to you is not the same as the collection costs it can claim from the client. Tell the agency immediately if the client pays you directly.

4. The agency sends a payment demand

The agency sends the client a formal demand showing the unpaid debt, any late payment interest and collection costs. The client can pay, request a payment plan or explain why they dispute the invoice.

This is voluntary collection: the agency is trying to obtain payment without court proceedings. It cannot seize the client’s money or property itself.

If the client bought the service for personal use, the agency can send its demand only after the overdue invoice has been followed up with a reminder and at least 14 full days have elapsed since that reminder was sent. Business debts follow different rules. See KKV’s explanation of consumer debt collection.

5. Decide whether to take the claim to court

If the money still does not arrive, you may consider legal collection. You can bring a claim for payment before a Finnish district court yourself or use an authorised representative. The client has an opportunity to respond.

An ordinary invoice for work or services generally needs a court judgment before it can be enforced. Court action is not automatic. First weigh the amount owed against the legal costs and the client’s ability to pay. Oikeus.fi explains debt cases.

6. Apply for enforcement after the judgment

Once you have a judgment, you or your authorised representative can apply for enforcement. The judgment does not start enforcement proceedings by itself.

Finland’s enforcement authority, Ulosottolaitos, sends the client a demand for payment. If they do not pay, the authority can recover money from their income or assets within the limits set by law. See its explanation of how enforcement begins.

If there is no income or property from which the debt can be recovered, the authority may return the case to you because the client lacks means. Neither a collection agency nor a judgment guarantees that you will get paid. Read the authority’s guidance on the end of enforcement.

What if the client disputes the invoice?

Ask them to explain their objection in writing and address the disagreement. Voluntary collection must stop if they dispute the obligation to pay on grounds that could affect that obligation. Inform the agency as well. The dispute may need mediation or a court decision. This rule comes from section 4 b of Finland’s Debt Collection Act (in Finnish).

Was the invoice issued through Bisse without your own Finnish Business ID? Contact Bisse support first and agree on reminders and next steps. Do not independently send the same invoice to another collector or change its payment details.

Ready to invoice for your work? Explore Bisse’s invoicing service or register with Bisse.fi.

Official sources

• KKV: the consumer debt collection process
• Finlex: Debt Collection Act (in Finnish)
• Oikeus.fi: debt matters
• National Enforcement Authority Finland: beginning of enforcement
• National Enforcement Authority Finland: end of enforcement

Published on 14 October 2026.