Invoicing software in 2026 — what EU law requires, and what's free vs paid

Invoicing software in the EU answers to one rule set at directive level and a second one decided by each member state on its own. The VAT Directive 2006/112/EC harmonises what an invoice must contain, wherever in the EU you issue one. E-invoicing is the opposite: whether it's mandatory, and from when, depends on each country's own domestic schedule, and the EU-wide ViDA directive only ties the cross-border layer together later. There's no single EU e-invoicing platform that every business must use, so this article covers the content rules every invoice has to meet, and the free and paid tools that help you issue one.

Because of that split, choosing invoicing software comes down to two questions: how many invoices you issue a month, and whether you want the tool to also handle bookkeeping or just invoicing. A free plan with a low document limit is fine for a handful of early clients and stops being enough once sales become regular. Data security matters too — a provider holding your clients' invoicing data is a provider you're trusting with a lot, so we end with a checklist, not a vendor name.

What an EU invoice must contain

VAT Directive 2006/112/EC, Art. 226 sets out the details a full invoice needs for VAT purposes, in every member state:

1. the date of issue;
2. "a sequential number, based on one or more series, which uniquely identifies the invoice";
3. the supplier's VAT identification number;
4. the customer's VAT number, where the customer is liable for the tax or the supply is intra-EU;
5. the full name and address of both supplier and customer;
6. the quantity and nature of the goods supplied, or the extent and nature of the services rendered;
7. the date of supply, if different from the date of issue;
8. the taxable amount per rate, the unit price net of VAT, and any discounts not included in the price;
9. the VAT rate applied;
10. the VAT amount payable.

Later points in Art. 226 add references for exemptions, reverse-charge supplies and other special cases — check the Directive directly before building a template for one of those. Art. 229 removes one requirement you might expect: "Member States shall not require invoices to be signed." Art. 230 lets the amounts on an invoice "be expressed in any currency, provided that the amount of VAT payable or to be adjusted is expressed in the national currency of the Member State".

Simplified invoices for small amounts

A simplified invoice carries fewer details, listed in Art. 226b: the date of issue, the supplier's identity, the type of goods or services, and the VAT amount or the information needed to calculate it. Under Art. 220a(1), every member state "shall allow" one in three cases: (a) where the invoice amount is not higher than €100; (b) for a document that amends an earlier invoice; and (c) "where the taxable person is benefitting from the exemption for small enterprises provided for in Article 284". Art. 220a(2) excludes, among others, intra-EU supplies of goods and reverse-charge supplies. On top of that, Art. 238(1)(a) lets a member state allow simplified invoices for amounts above €100 and up to €400 — a national option, not an EU-wide guarantee, so check your own country's rules before assuming the higher threshold applies to you. Whether you're eligible for the small-enterprise exemption in the first place, and at what national threshold, is covered in how much it costs to start a business.

E-invoicing: national mandates, not one EU date

Unlike invoice content, e-invoicing obligations are national, not EU-wide. The ViDA package, Council Directive (EU) 2025/516, entered into force on 14 April 2025. It standardises the e-invoice format itself (EN 16931) and introduces mandatory digital reporting for cross-border B2B transactions from 1 July 2030, with existing domestic real-time reporting systems required to align with the EU standard by 1 January 2035.

What ViDA does not do is set one date on which "e-invoicing becomes mandatory in the EU." Each member state that runs a domestic e-invoicing mandate — and several already do, or are phasing one in — sets its own scope, its own thresholds and its own timeline; ViDA only harmonises the format and the cross-border reporting layer on top of those national schemes, later. If a source tells you 2030 is "when EU e-invoicing becomes mandatory", it's confusing the cross-border reporting date with domestic mandates, which depend entirely on your own country. Check your own country's rules directly.

Peppol is an international e-invoicing network: an invoice sent through one provider's access point reaches a recipient connected through another provider, without a direct point-to-point connection between the two businesses. Many invoicing tools sell Peppol connectivity as a paid feature.

Free and paid invoicing tools

A free tool available across the EU exists: the FAQ on the Zoho Invoice pricing page answers "Is Zoho Invoice free?" with "Yes, Zoho Invoice is free for small business owners, freelancers, and entrepreneurs" (read 2.10.2026). The page we read is Zoho's global one, priced in dollars, so we simply say "free". We didn't read any usage limits for it, so none are stated here — check the current terms before relying on it for regular invoicing.

Paid invoicing tools sold across the EU exist too, but we haven't verified a euro price list we could quote, so here is what paid tiers sell rather than a price: moving up from a free plan, you typically pay for automatic import of incoming invoices, integrations with your bank and shop, built-in bookkeeping, and e-invoicing or Peppol connectivity for the countries where that matters to you.

Data checklist for invoicing software

Whatever tool you choose, it holds your clients' invoicing data, and that makes its security part of the decision, not an afterthought. Before you commit:

• Check whether the account can be protected with two-factor authentication. If a password alone unlocks every invoice and every client's details, that's a single point of failure.
• Check whether the provider signs a data-processing agreement. Under GDPR, a provider processing personal data on your behalf as a processor should offer a DPA setting out what it does with that data and under what safeguards — GDPR, Art. 28. Ask for the DPA by name.
• Check whether you can export your invoices and client list at any time. If your own records are locked in, you're no longer just using the tool — you depend on it.

How to secure business accounts more broadly, including the admin account itself, is in protecting company data. Questions worth asking any cloud provider holding business data are gathered in cloud data security.

How to choose invoicing software: a checklist

Pick invoicing software by answering these questions in order, not by brand:

1. How many invoices do you issue a month? At a handful, a free plan or Zoho Invoice's free tier is likely enough. At regular, repeat sales, check the specific plan's document limit before relying on it.
2. Who handles your bookkeeping? If an accountant does, invoicing software that exports cleanly is enough. If you do it yourself, compare plans that bundle bookkeeping, not ones that only invoice.
3. Do you need e-invoicing or Peppol connectivity? That depends entirely on your own country's domestic mandate and who you're invoicing — check directly rather than assuming a date from this article applies to you.
4. What should the data checklist above look like for this specific provider? Two-factor authentication, a signed DPA, and an export you can run yourself.
5. How many people need to issue invoices? User limits differ between free and paid tiers, so check before you need a second person to issue one.

Invoicing software is usually the first paid or free tool a new business adopts, but rarely the only one. Once enquiries pick up and you need to remember who asked what, it's time for CRM for a small business. If you want incoming invoices to land automatically in your accounting system or a spreadsheet, see business process automation. The order of the rest of a new business's technology purchases — domain, mail, office suite — is in technology for a new business.