Which Accounting Software Is Best for a Small Business in the EU?

There is no single best product. There is a best product for your country, your VAT position, your bookkeeper and your transaction source, and this guide shows how to find it.

The best accounting software for a small business in the EU is the one that files your country's returns, handles your VAT situation, fits the person who keeps your books, and matches where your transactions come from. Those four facts narrow the field more than any feature list does, and a product that is excellent for a German consultancy can be the wrong choice for a Lithuanian online shop selling into five countries.

This article turns the four facts into a decision table, lists what to check specifically because you are in the EU, gives one neutral sentence on each of the commonly shortlisted products, and says where Nordlet does and does not fit.

The four things that decide it

1. Your country's filings. VAT returns, EU sales lists, Intrastat, withholding and social insurance declarations, corporate tax, annual accounts: each is national, filed through a national portal, in a national format. Software either produces these for your country or it does not. This is a yes-or-no check, and it comes first.

2. Your VAT situation. A business below its national VAT registration threshold has almost no VAT work. A registered business selling only domestically has a monthly or quarterly return. A business selling to consumers in other member states above €10,000 a year needs OSS. A business importing low-value goods needs IOSS. A business selling through a marketplace needs the deemed-supplier treatment. Each step up needs software that models it.

3. Who keeps the books. An external accountant wants clean exports and a system they already know. An in-house bookkeeper wants a good interface and automation of the monthly cycle. A founder doing it themselves wants the fewest decisions. These pull in different directions.

4. Where transactions come from. If people create them, by sending invoices and paying bills, you need an application. If your own software creates them, by selling through a storefront, settling marketplace payouts or billing subscriptions, you need an API that your software calls, and the interface matters less. Accounting SaaS in 2026 explains this distinction in more depth.

Decision table by business type

Business	What matters most	What to look for	What to avoid
Sole trader or micro company with an external accountant	The accountant's workflow	A product the accountant already uses, or one with exports they accept (DATEV, FEC, SIE, SAF-T); bank feed; invoicing	Anything that needs configuration the accountant will not do
Small company with an in-house bookkeeper, domestic sales	The monthly cycle	Bank feeds, OCR capture, payment matching, period locking, the national VAT return produced in the system, payroll or a payroll integration	Per-user pricing that penalises giving the accountant and the manager access
Cross-border e-commerce seller	VAT treatment per destination	VAT resolution by customer country and type of supply, OSS and IOSS returns, distance-sales threshold tracking, VIES checks, e-invoicing where mandated	Products where EU VAT is a manual rate you type on each invoice
SaaS or marketplace platform	Transactions created by code	An API with idempotency, webhooks, scoped keys, sandbox companies; revenue recognition; multi-company; metered pricing	Application-first products whose API is a sync companion rather than the product

Most businesses fit one row. A business that fits two rows, such as an e-commerce seller that is also a platform, should pick the more demanding one.

What to check because you are in the EU

These are the checks that non-EU product reviews skip and that decide whether a product works here.

National VAT return, produced by the system. Not a summary report you copy from. Ask for your country by name.
E-invoicing. Peppol BIS 3.0 for the countries that use the network, and the national clearance systems where they exist: Italy's SdI, Poland's KSeF, Romania's e-Factura, Hungary's Online Számla reporting, Croatia's Fiscalization, Spain's SII and Veri*Factu, Greece's myDATA, and the French and German mandates arriving in 2026 and 2027. The EU e-invoicing country guide lists them.
OSS and IOSS. If you sell to consumers in other member states, the quarterly Union return and the monthly import return should come out of the invoices, with credit notes netted and prior-period corrections reported.
SME exemption thresholds. Since 2025 small businesses can use the exemption across borders with an EX number. The software should know the thresholds and warn you as you approach them.
Peppol and VIES. Customer VAT numbers checked against the EU registry before you zero-rate an intra-EU supply.
The national chart of accounts and statement layout, so the annual accounts come out in the format your register expects.
Language. Yours, and your accountant's.
Where the data is hosted and the GDPR terms.

The commonly shortlisted products, in one sentence each

Each sentence states what the product is generally known for; verify the specifics for your country against the vendor's own documentation.

Xero is a cloud application with bank feeds and a large app marketplace, priced per organisation, widely used by small businesses and their accountants in the UK, Ireland and elsewhere.
QuickBooks Online is a similar application with a large global footprint, priced per organisation in feature tiers, and often the default where the accountant already uses it.
Zoho Books is a lower-priced cloud application that is part of a wider business suite, with EU VAT handling that is generally described as simpler than that of products built for European tax regimes.
Odoo is a modular open-source ERP whose accounting app works for many EU countries through localisation modules, at the cost of someone owning the configuration.
DATEV-connected tools in Germany matter because most German tax advisers work in DATEV, so a product that exports booking records in DATEV format fits the German accountant's workflow.
Fortnox is a Swedish cloud application that is common among Swedish small businesses and produces SIE files.
Visma is a Nordic group whose products are widely used across Norway, Sweden, Denmark, Finland and the Netherlands.
Pennylane is a French application that combines bookkeeping, invoicing and the relationship with the accountant, built around French GAAP.

Our country article on Germany, the UK and the Nordics goes further on the national patterns.

Where Nordlet fits

Nordlet is an API-first accounting platform for the EU and EEA. It fits the fourth row of the table best, and the third row when the seller's own software issues the invoices.

Country filings: 30 country modules, covering the EU-27 plus Norway, Iceland and Liechtenstein. The filing support table states, deadline by deadline, whether Nordlet sends the filing itself under your certificate, builds a file for you to upload, or shows the figures for you to key in. Today that is 168 filings sent, 63 built for upload and 10 keyed in by hand.
VAT: the EU VAT engine resolves the treatment per supply, invoices carry the scheme, and OSS, IOSS, distance-sales and SME-threshold figures come out of the ledger.
E-invoicing: Peppol BIS 3.0 through your own access point or the built-in one, and national formats for Italy, Poland, Romania, Hungary, Greece, Croatia, Spain, Portugal and France, sent under your own credentials.
Pricing: metered by request, every module in every plan, from €10 a month with 3,000 requests. Unlimited users and companies, so the accountant's access costs nothing extra. Full details on the pricing page.
The honest limits: the interface is in Lithuanian and English only, and the product is young, in early access in 2026 and onboarding design partners. A sole trader whose accountant lives in Xero or DATEV and who never touches an API has no reason to switch. A business whose product creates its transactions, or that sells across EU borders and wants the VAT and filings handled from the books, is who it is built for.

How to run the choice

Write down your country, your VAT position, who keeps your books, and where transactions come from.
Eliminate every product that does not produce your national filings. Check by name, not by "EU support".
Among the rest, pick the pricing model that matches you: per organisation for one entity and few people, metered for volume and automation. Our pricing guide covers the models.
Test the two finalists with a month of real data in a trial or sandbox: issue an invoice, import a statement, match the payment, produce the VAT return, lock the period, export the ledger.
Ask your accountant which of the two they would rather receive files from. Their answer is a tie-breaker, not a veto.

FAQ

Is there one best accounting software for all EU countries?

No. Filings, VAT returns, e-invoicing systems and annual-accounts formats are national. A product can cover many countries, but "best" is decided by whether it covers yours.

Do I need accounting software if I have an accountant?

You need something that records sales and purchases and gives the accountant the data. For a very small business that can be the accountant's own system. Once you have bank feeds to reconcile, customers to invoice regularly or VAT to report, your own system saves both of you time.

What should an e-commerce seller in the EU look for first?

VAT treatment by destination country and type of supply, and OSS and IOSS returns produced from the invoices. Sellers above the €10,000 EU-wide threshold owe destination-country VAT on consumer sales, and the software should know that without being told on each invoice.

Is open-source accounting software a good choice for a small EU business?

It can be, if someone on the team will own installation, updates, localisation modules and backups. The licence is free; the time is not. See our article on free accounting software.

When is an API-first product the wrong choice?

When no software of yours creates transactions and nobody on the team will call an API. In that case an application built for bookkeepers is a better fit, and the API-first product's advantages are ones you would never use.