Accounting, invoicing and e-invoicing software, explained

What accounting and invoicing software actually does

Accounting software turns what your business did into what the tax administration and your accountant need, in their format, on their schedule. Invoicing software only does the front half: it issues the document, numbers it correctly and chases the payment. The division matters because in Europe the back half is national. A ledger has to know your chart of accounts, your VAT rates, the file format your administration accepts and the export your accountant opens, and almost no vendor does that for every country. So the first question is not which product is best, it is which products know your country at all.

The four kinds of product in this category

Invoicing-only tools. Zoho Invoice, Zervant, Invoice Ninja, Stripe Invoicing. They issue and track invoices and stop there. Right for a freelancer or a side business whose bookkeeping is a quarterly handover. Zoho Invoice is free, and Stripe Invoicing charges 0,4 percent per paid invoice instead of a subscription. Wrong once you need a ledger, a balance sheet or a VAT return.

Small-business bookkeeping with invoicing. sevdesk and Lexware Office for Germany, Moneybird for the Netherlands, Zoho Books for general use. Invoices, bank feeds, expenses, a usable ledger, and tax features aimed at one country. Right for a company that keeps its own books. The catch is that the country they localise for may not be yours.

Fiduciaire-grade local ledgers. Sage BOB, Horus, Exact WinBooks, Exact Online. These are the packages Luxembourg and Belgian accounting practices actually run, built around the standardised chart of accounts, the official returns and the audit file. Right when your accountant has a vote, which in Luxembourg is most of the time. Wrong if you wanted a modern interface for 10 EUR a month.

ERP accounting modules. Odoo is the clearest case: the ledger sits next to sales, stock and purchasing, and the Luxembourg localisation documents the PCN 2020 chart of accounts, eCDF XML and a FAIA export. Right when one system for everything is worth more than the best single module. Wrong if you only need invoices, because you are paying per user for a suite.

What actually matters when you choose

1. Does it know your country? Chart of accounts, the local VAT rates, the return format and the audit file. For Luxembourg that means PCN 2020, eCDF XML and FAIA 2.01. A product that cannot name those three does not do Luxembourg accounting, whatever the feature page says.
2. Will your accountant work in it, or do they need a file? Both answers are fine, but they lead to different products. Ask your fiduciaire before the demo, not after.
3. Real e-invoicing or a file export? Ask whether the product emits Peppol BIS Billing 3.0 in UBL and transmits through an access point. Moneybird includes Peppol sending and receiving on all four plans from 3 EUR a month. Invoice Ninja requires its Enterprise tier for Peppol. Many vendors describe a downloadable XML as e-invoicing.
4. Intra-EU VAT. Reverse charge for B2B across borders, and the One Stop Shop for digital services to consumers. Stripe Invoicing with Stripe Tax validates a customer's VAT number and applies reverse charge automatically, sevdesk names the One Stop Shop as a feature. Most tools leave both to you.
5. Bank feeds and reconciliation. A PSD2 connection to your actual bank, not a CSV import. Check your specific bank, because coverage in Luxembourg is thinner than in France or Germany.
6. The price unit and the caps. Per user, per organisation, per client file, or per invoice. Horus bundles fifteen client files, Exact publishes a Belgian range of 49 to 299 EUR a month, Odoo charges per user for all apps.
7. Retention and the audit trail. Ten years of readable records in Luxembourg, and corrections that leave a trace. Ask what an export looks like after you cancel.

What does accounting software cost in 2026?

Published prices, net, read from vendor pages on 11 November 2026.

Read as a range: invoicing costs 0 to 15 EUR a month, bookkeeping for a small company 10 to 25 EUR, and a package that genuinely handles Luxembourg obligations starts around 50 to 70 EUR a month. The gap between the second and third band is the price of the national compliance work, and it is the single most common surprise in this category.

The mistakes buyers make

Buying German or Dutch software for a Luxembourg company, because the interface is nicer, then discovering there is no eCDF output and no FAIA file. Treating a PDF sent by email as an electronic invoice. Choosing before asking the fiduciaire whether they will open the file. Assuming a global brand has a local edition: QuickBooks Online has no Luxembourg edition and no prefilled EU VAT rates. Paying per user and then adding seats for the accountant and the bookkeeper. And accepting a feature list instead of a generated file, when the only real test is an eCDF declaration and a FAIA export produced from a demo database.

Europe and Luxembourg specifics

• Four VAT rates. Luxembourg applies 17 percent standard, 14 percent intermediate, 8 percent reduced and 3 percent super-reduced, set in article 39(3) of the VAT law and unchanged since 1 January 2024. The rate follows the article, so one invoice can carry several.
• eCDF is the filing channel. All VAT returns go through the eCDF platform, mandatory since 1 January 2020. Frequency follows turnover: annual below 112 000 EUR, quarterly between 112 000 and 620 000 EUR, monthly above. The small enterprise scheme sits at 50 000 EUR of national turnover, raised from 35 000 EUR on 1 January 2025.
• FAIA 2.01 is the audit file. A VAT taxable person keeping computerised accounts under the standardised chart of accounts can be asked for it during an inspection, in one of three schemas depending on whether invoicing lives inside the accounting system. One file per calendar year, no truncated years.
• E-invoicing is already compulsory towards the state. Since 18 March 2023 every economic operator invoicing a Luxembourg public body sends a structured electronic invoice, in Peppol BIS Billing 3.0 UBL or XRechnung 3.0.1, through Peppol or the forms on MyGuichet.lu. Bill 8815 proposes extending this to business to business invoicing between 2028 and 2029, and the EU ViDA directive sets 1 July 2030 for cross-border transactions.
• The fiduciaire is part of the product. In Luxembourg most small companies do not file alone. The practice's software, and whether it can import your data, is a real constraint rather than a preference.

Questions to ask an accounting software vendor

• Can you produce an eCDF XML return and a FAIA 2.01 file from a demo database today?
• Do you transmit Peppol BIS Billing 3.0 through an access point, or only export a file?
• Which Luxembourg banks have a working PSD2 feed?
• How do you handle reverse charge on intra-EU B2B sales, and the One Stop Shop?
• What is my bill including accountant seats or client files?

Where to go next

The ranking against Luxembourg obligations is in the best accounting software for Luxembourg, and the invoicing-only end is ranked separately in the best invoicing software for freelancers in Europe. Before you shortlist, read choosing accounting software with a fiduciaire. The two obligations that decide most shortlists have their own pages: which VAT rates apply in Luxembourg and what the FAIA export is, plus the e-invoicing obligation. Prices and sources sit on the Odoo Accounting and Horus profiles. Vendors can correct us through get listed.