What Software Do Accountants Actually Use in 2026?
A plain list of what sits on an accountant's desk in 2026, from the general ledger to the e-filing portals, and what that means for the system you choose.
Accountants in 2026 use seven kinds of software: a general ledger or bookkeeping system, a practice management tool, the tax authorities' e-filing portals and the software that produces files for them, bank feed and document capture tools, spreadsheets, audit file exporters, and payroll software. No single product covers all seven, and most accountants work in several at once. Which products fill each slot depends on the country, because statutory formats and filing portals are national.
This article walks through each category, explains how an accounting firm's toolkit differs from an in-house finance team's, lists the country-specific formats an EU accountant has to produce, and ends with what accountants look for in a client's system.
The seven categories
General ledger and bookkeeping
The system of record: chart of accounts, journal entries, customer and supplier ledgers, VAT, fixed assets, period close. Everything else reads from or writes to this. For small businesses this is usually a cloud product; for larger ones it is the finance module of an ERP. Accountants rarely choose it; the client already has one, and the accountant works in whatever that is.
Practice management
Used by firms, not by in-house teams: client lists, engagement letters, deadline tracking across all clients, time recording, billing and document requests. It knows nothing about debits and credits. Its job is to make sure forty clients' VAT returns are filed on time.
Tax filing and e-filing
Two layers. First, the national portals run by the tax authority (ELSTER in Germany, VMI's EDS in Lithuania, AEAT's Sede in Spain, and so on) where returns are submitted. Second, the software that produces the file the portal accepts, or that submits directly through a web service under the taxpayer's certificate. In many countries the accountant's ledger software does this; in others a separate filing tool is normal.
Bank feeds and document capture
Open-banking connections that pull transactions automatically, statement importers for camt.053 and MT940 files, and OCR tools that read supplier invoices from PDFs or photos. These replace the typing that used to be most of a bookkeeper's day. Capture tools typically forward documents into the ledger by e-mail intake or an integration.
Spreadsheets
Still everywhere: reconciliations, working papers, provisions, consolidation adjustments, the odd report the system does not produce. The healthy pattern is spreadsheets for analysis and the ledger for the record. The unhealthy pattern is a balance that exists only in a spreadsheet.
Audit file exports
Formats that hand the whole ledger to an auditor, a tax inspector or a successor accountant: SAF-T variants, Germany's DATEV format, France's FEC, Sweden's SIE. An accountant needs the client's system to produce these on demand, correctly, without manual reformatting.
Payroll
Often a separate product from the ledger, because payroll rules change yearly and are national. The payroll run posts a summary journal to the ledger and produces the monthly withholding and social insurance declarations.
Firm versus in-house team
| Accounting firm | In-house finance team | |
|---|---|---|
| Ledger | Works in each client's system, or hosts clients on the firm's own | One system, deeply configured |
| Practice management | Essential | Not used; replaced by the company's own task tooling |
| Filing | Files for many clients, often under a representative's credentials | Files for one company under its own certificate |
| Capture and bank feeds | Standardised across clients to save time | Chosen to fit the company's banks and suppliers |
| Exports | Needs clean exports from every client system it does not control | Needs exports for the auditor and the tax authority |
| Spreadsheets | Working papers per client | Management reporting, budgets, consolidation |
The practical consequence for a business: if an external firm does your books, the firm cares most about how easily it can get data in and out of your system. If you have an in-house team, they care most about how much of the monthly cycle the system does without them.
Country-specific formats an EU accountant must produce
Statutory accounting is national even inside the EU, so the formats below are not optional for the accountants concerned.
| Country | Format or system | What it is |
|---|---|---|
| Germany | DATEV | The export format most German tax advisers' software expects for booking records (Buchungsstapel) |
| France | FEC (fichier des écritures comptables) | A full journal export the tax authority can demand at any audit; mandatory format and field order |
| Sweden | SIE | The standard interchange format for accounting data between Swedish systems |
| Lithuania | i.SAF | Monthly registers of issued and received VAT invoices sent to the State Tax Inspectorate's i.MAS system |
| Lithuania | i.SAF-T | The standard audit file produced on request |
| Portugal | SAF-T (PT) | Monthly billing communication and the full audit file |
| Norway | SAF-T Financial | The standard audit file demanded by the tax administration |
| Romania | SAF-T (D406) | Monthly or quarterly standard audit file to ANAF |
Accountants evaluate a client's software partly on whether it produces these natively. A system that cannot means the accountant rebuilds the file by hand, which costs hours and introduces errors.
What accountants want from a client's system
When accountants describe a good client system, the list is consistent:
- A real audit trail. Who changed what, when, with the before and after values, queryable rather than buried in logs.
- Period locking. Once a month is closed and the VAT return filed, nothing can be posted into it, by anyone, through any interface.
- Posted entries that cannot be edited. Corrections by reversal, so the history is complete.
- VAT registers and returns the system produces itself, not figures someone assembles in a spreadsheet.
- Clean exports. Trial balance, general ledger detail and the national audit file, in formats the accountant's own tools read.
- Document attachments on transactions, so the supporting invoice is one click from the entry.
- A role for the accountant with the access they need and no more.
- Bank reconciliation inside the system, so the books meet the bank statement every month.
Nothing on that list is about the user interface being pretty. It is about the record being trustworthy and portable.
How Nordlet fits
Nordlet is an API-first accounting platform, so it is not a tool accountants buy for themselves. It is the system a business runs, and accountants work in it or take exports from it. Measured against the list above:
- Audit trail: every change is recorded with actor, action, entity and diff, and is searchable in Settings → Audit log or through
audit/list. - Period locking and immutable entries: a posting dated into a locked period is rejected with HTTP 409, through the app and the API alike; posted entries are corrected by reversal. See the immutable ledger glossary entry.
- VAT registers and returns: Lithuanian i.SAF registers and the FR0600 return, OSS and IOSS returns, and national VAT return packs are computed from the ledger; the filing support table lists, for all 30 countries, which deadlines Nordlet files itself, which files it builds for upload, and which figures are keyed in by hand.
- Exports: trial balance, general journal and ledger detail as XLSX, PDF or JSON, and ledger exports in DATEV, FEC and SIE formats for German, French and Swedish accountants.
- Roles: owner, admin, accountant, manager, developer and viewer, described in the roles guide.
- Bank reconciliation: PSD2 bank feeds, camt.053 and MT940 import, Stripe CSV import, and payment matching scored by amount, reference, counterparty and IBAN.
- Document capture: OCR at €0.005 per page and an e-mail intake address per company.
- Filing calendar: each company sees its own deadlines; the ones Nordlet can produce have a File now button and an optional automatic-filing switch.
Nordlet is a young product, in early access in 2026. An accountant assessing it should test the exports and the period lock in a sandbox company before relying on them, which is the same advice we would give for any system.
FAQ
Do accountants use Excel?
Yes, nearly all of them, for working papers, reconciliations and analysis. The question is whether the figures in the spreadsheet are copied from a ledger that holds the record, or whether the spreadsheet is the record. The first is normal practice; the second is a risk.
Do accountants prefer a specific accounting product?
Preferences are national and depend on what a firm's other clients use. In Germany, software that exports to DATEV is strongly preferred because most tax advisers run DATEV. In the Nordics and the UK, cloud products with bank feeds dominate small-business practice. An accountant will usually accept any system that produces clean exports and a trustworthy audit trail.
What software do accountants use for tax filing in the EU?
The national portal of each tax authority, plus software that produces or submits the required file. Which portal depends on the country: ELSTER in Germany, EDS and i.MAS in Lithuania, AEAT's Sede electrónica in Spain, Intervat in Belgium, and so on. Nordlet's filing support page names the system for every deadline it knows about.
Can an external accountant work in Nordlet?
Yes. Invite them with the accountant role and they see the company's ledger, documents, reports and declarations, with the audit log recording what they do. They can also take DATEV, FEC or SIE exports into their own software.
Is practice management software part of accounting software?
No. Practice management tracks a firm's clients, deadlines and billing. Accounting software holds a company's books. Firms use both; businesses only need the second.