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Choosing accounting software for a small business

A practical framework for picking accounting or invoicing software that fits your business size, country, and future needs — without over-buying or under-buying.

By The LeapInvoice team

Accounting software is one of those categories where every option looks similar in the demo and completely different in daily use. The wrong pick costs you either time (fighting the tool) or money (paying for features you don't need) or, worst, a mid-year migration which will eat your February.

Here's how to pick well.

Start with what you actually need

Before you look at any product, write down:

  1. Legal structure — sole trader / LLC / GmbH / Ltd / KFT / etc. Different software handles different structures well.
  2. Country — the software has to speak the local tax office's language. A US tool with no VAT support is useless in Europe.
  3. VAT / sales tax status — registered? Cross-border? OSS?
  4. Currencies — one, or many?
  5. Transaction volume — 5 invoices a month or 500?
  6. Who else touches it — just you, or an accountant, or a small team?
  7. What you need to integrate with — Stripe? Wise? Your CRM? Bank feeds?
  8. What's next in the next 24 months — hiring, incorporating, opening a subsidiary, selling internationally?

Half the time the answers point you at one obvious category and you can ignore three quarters of the market.

The five categories

1. Invoicing-first tools

Send invoices, capture payments, log expenses. Not full double-entry accounting.

Examples: Bonsai, HoneyBook, Wave (US), plenty of country-specific tools like LeapInvoice.

  • Fit for: solo freelancers under the VAT threshold, low transaction volume, no complex bookkeeping needs.
  • Cost: €0–€25/month typically.
  • Watch out for: growing out of them fast once you incorporate or need real reporting.

2. Small-business accounting

Full double-entry books, bank feeds, VAT returns, payroll add-ons.

Examples: Xero, QuickBooks Online, FreeAgent, Zoho Books, Sage Accounting.

  • Fit for: VAT-registered freelancers, small companies (Ltd, GmbH, KFT, OÜ), teams under 10 people.
  • Cost: €10–€60/month depending on plan and country.
  • Watch out for: feature bloat and add-on charges. The base plan is usually not enough — real cost is often 2× the sticker price by the time you add payroll, projects, or multiple currencies.

3. Country-native tools

Software built specifically for one country's regulatory stack.

Examples: DATEV (Germany), Fortnox (Sweden), Billy / Dinero (Denmark), Vero (Finland), KIBooks / Számlázz.hu (Hungary), Contpaqi (Mexico).

  • Fit for: businesses fully within one country with strict local compliance requirements (real-time invoice reporting, structured tax filings).
  • Cost: varies widely.
  • Watch out for: limited international support if your business is growing across borders.

4. Mid-market accounting

More complex reporting, multi-entity, better project accounting.

Examples: Xero + advanced apps, NetSuite, Sage Intacct, Odoo.

  • Fit for: businesses with 10+ employees, multiple entities, or ambitions to raise funding.
  • Cost: €200–€2,000+/month, sometimes implementation fees on top.
  • Watch out for: overbuying. Most sub-€1M businesses don't need this tier.

5. Enterprise ERP

SAP, Oracle. Not for you if you're reading this article.

The features that actually matter for solo/small businesses

  • Bank feeds for your bank. This is not universally supported — check that your specific bank is in the tool's supported list for your country. A missing feed means daily manual import forever.
  • Invoice templates that match your country's legal requirements. The tool should produce compliant invoices out of the box for your jurisdiction (VAT breakdown, reverse charge notes, sequential numbering).
  • VAT return generation. For any VAT-registered business, the tool should produce the VAT return in the format your tax authority accepts, ideally submitting electronically.
  • E-invoicing support in mandate countries (Peppol, SdI, Online Számla, KSeF). Increasingly non-optional in Europe.
  • Multi-currency accounting with correct FX handling if you invoice in more than one currency.
  • Accountant collaboration — read-only or full access for your accountant, in a way they can actually use (their firm probably has a preferred set of tools).
  • Mobile receipt capture. Attach a photo of a receipt to a transaction from your phone.
  • Export/import. Whatever you put in, you should be able to get out — CSV of transactions, PDFs of invoices, XBRL of accounts. Vendor lock-in in accounting software is real and painful.

The features you probably don't need yet

  • Time tracking (unless you bill hourly at scale — otherwise a spreadsheet works)
  • Full project accounting (not until you have multi-month engagements with sub-contractors)
  • Inventory management (unless you sell physical goods)
  • Fixed-asset registers (until you have several thousand of assets — a spreadsheet is fine for a few)
  • Multi-entity consolidation (not until you have multiple entities)
  • Advanced analytics dashboards (your P&L is enough)

Buying software for future needs sounds prudent and is usually wrong. You'll pay for features you don't use, and by the time you need them, better options will exist.

The migration trap

Once you have three months of data in a tool, moving is painful. Once you have a year, it's a project. Once you have a VAT filing history, it's a nightmare. Move early or commit.

If you're switching, do it at your fiscal year-end. You start clean in the new tool, your old year sits neatly in the old tool as a reference, and you avoid the ugly mid-year reconciliation.

The "which one specifically" heuristic

  • Solo freelancer, under VAT threshold, one country — a good invoicing tool + a spreadsheet.
  • Solo freelancer, VAT registered, EU — Xero, FreeAgent, or a country-native tool with good VAT support.
  • UK Ltd, one director — Xero or FreeAgent. FreeAgent free with a Mettle or NatWest business account.
  • German GmbH or freelancer — DATEV if your accountant asks for it (they will); Lexoffice or sevDesk otherwise.
  • Hungarian KFT — a Hungarian-native tool with Online Számla integration is non-negotiable. English UI is a bonus.
  • US LLC or S-corp — QuickBooks Online for compatibility with US accountants; Xero as the modern alternative.
  • International business, multi-currency, growing team — Xero or Zoho Books, with serious integration work.

The decision, in one paragraph

Pick the cheapest tool that clears the compliance bar for your country, produces invoices that look serious, has a working bank feed for your bank, and is happily used by an accountant who serves clients like you. Don't overthink it. The best accounting software is the one you'll actually open on the first Monday of every month.