Short answer: is e-invoicing mandatory in Finland?
For the public sector, the answer is clear-cut: Finnish government agencies and central purchasing bodies have had to accept and process e-invoices meeting the European standard since 1 April 2019, with other public buyers following from 1 April 2020. B2B sales work differently. From that same 1 April 2020 date, any buyer, and any supplier with turnover above €10,000, gained the right to demand an e-invoice instead of a paper or PDF one. That's a right to request, not a blanket obligation for every Finnish small business. It doesn't extend to invoices sent to private individuals, as Vero confirms. As of 25 August 2026, Finland still has no confirmed general domestic B2B e-invoicing mandate. What exists is a demand right, not automatic enforcement.
Don't confuse them: the €10,000 e-invoice threshold and the €20,000 VAT threshold
These two numbers live in two different laws, and mixing them up is an easy mistake to make. The €10,000 threshold in the e-invoicing act is measured against your company's turnover for the financial year. The €20,000 threshold for mandatory VAT registration, by contrast, is measured by calendar year, and you have to watch both the current and the preceding calendar year. That means it's entirely possible for your business to be VAT-exempt while already being legally entitled to both request and send e-invoices.
Why a PDF attached to an email is not a Finnish e-invoice
Valtiokonttori, Finland's state treasury office, says it plainly: a PDF or image file sent as an email attachment is not an e-invoice. A genuine e-invoice is machine-readable structured data (figures and fields a computer can read directly rather than a scanned picture of them) that flows straight into accounting or banking software and follows the European standard EN 16931, the shared data format e-invoicing systems across Europe have to support. Finland's VAT act uses a broader term, “electronic invoice,” and a PDF does technically satisfy that. But that doesn't make it an e-invoice under the e-invoicing act.
How do you send your first e-invoice to a Finnish customer?
Before you send anything, look up the customer's business ID, EDI e-invoice address and operator identifier (EDI here just means the electronic address format e-invoicing networks use to route a file to the right inbox) in the verkollaskuosoite.fi registry. Larger organizations often have more than one address listed, so make sure you've got the right one for the department you're billing. Then build the invoice in software that supports the EN 16931 standard, and let your operator (the network that carries e-invoices between sender and receiver, much like how mobile carriers connect calls across different networks) deliver it in the correct format.
Free portal, accounting software, or an operator?
For a one-off invoice, a free portal offered by the customer is usually enough: you type the details once and send. For regular B2B billing, it's worth connecting your accounting or invoicing software directly to an e-invoice operator instead. If your software doesn't already have that connection built in, you'll need to sign a separate agreement with an operator yourself.
VAT details and the mistakes that get invoices rejected
Say you're billing a Finnish company €1,200 for services. That invoice must legally include the invoice number, issue date, seller's VAT number, the taxable amount broken down by VAT rate, and the VAT amount, and, where reverse charge applies (meaning the buyer rather than the seller accounts for the VAT), a note saying so. Getting these details wrong isn't just a formatting headache: careless non-compliance can bring a fine of up to €5,000.
What should you prepare for cross-border e-invoicing in 2030?
The ViDA directive (VAT in the Digital Age, the EU's overhaul of digital VAT reporting) sets a firm date: from 1 July 2030, intra-EU goods deliveries under Article 138 and reverse-charge transactions under Articles 194–197 must be invoiced within 10 days of the taxable event, and invoices for transactions subject to reporting obligations must be issued as e-invoices. If you sell into other EU member states, it's worth choosing EN 16931-compatible software now rather than waiting for Finland's more detailed national implementation decision.
FAQ
Is e-invoicing mandatory in Finland?
For the public sector, e-invoicing is mandatory from 2019/2020. There is no general obligation in B2B sales, but the supplier and the entrepreneur with a turnover of over 10,000 euros have the right to claim from 1 April 2020. This right does not extend to private individuals.
What is the difference between the €10,000 e-invoice limit and the €20,000 VAT limit?
The €10,000 limit of the E-Invoice Act is calculated based on the turnover of the financial year, while the €20,000 limit for VAT payers is calculated based on the calendar year. A company may be VAT exempt but still have the right to request an e-invoice.
Why is a PDF not an e-invoice?
A PDF or image file sent as an attachment to an email is not an e-invoice, because an e-invoice is a machine-readable structured data set that complies with the European standard EN 16931 and goes directly into accounting software.