Best Invoicing App Germany 2026: Deep Dive Comparison (sevdesk, Lexoffice, Billbee, XRechnung, ZUGFeRD, VAT)

If you run a Freiberufler practice in Berlin, a UG in Munich, or a Kleinunternehmer side business in Hamburg, the right invoicing app is not a nice-to-have in 2026. It is the difference between a 30-minute monthly bookkeeping ritual and a 6-hour weekend grind that ends with VAT errors and a stern letter from your Finanzamt.

This guide compares the six dominant invoicing apps in Germany for 2026, scores them against the new XRechnung B2G mandate, ZUGFeRD hybrid format, OSS one-stop-shop reporting, and DATEV export workflows. We finish with a worked example for a 20-invoice-per-month solopreneur, a Polish reader angle for cross-border invoicing, and an FAQ that covers the gotchas auditors actually flag.

TL;DR

• Winner: sevdesk Buchhaltung Pro at roughly EUR 19.90 per month (billed annually). Native XRechnung and ZUGFeRD output, DATEV-ready export, OSS module, PSD2 bank reconciliation with 4,000+ German banks, mobile receipt OCR, and a forgiving free trial.
• Runner-up: Lexoffice Buchhaltung & Berichte at roughly EUR 19.90 per month. Stronger DATEV story for tax advisors, slightly weaker e-commerce integrations than sevdesk.
• Best for e-commerce-heavy invoicing: Billbee at EUR 9-39 per month based on order volume. Multi-channel from Amazon, Etsy, Shopify, with automatic invoice generation per order.
• Best free starter: Lexware Office Free (limited) or sevdesk 14-day trial without credit card.
• Compliance status: XRechnung is mandatory for all B2G invoicing in Germany since 2020. B2B mandatory e-invoicing rolls in phased: receipt capability mandatory 2025-01-01, full issuance for revenue >EUR 800k from 2027-01-01, all others from 2028-01-01. Plan for it now.
• Monthly cost band for 20 invoices/month solopreneur: EUR 10-25.

The German E-Invoicing Landscape: What Changed and What Is Coming

Germany sits in the second wave of EU e-invoicing mandates. Three names you must know:

• XRechnung is the XML format required by federal, state, and most municipal public-sector buyers since November 2020. The regulator is KoSIT (Koordinierungsstelle für IT-Standards) under the IT-Planungsrat. Format basis: EN 16931 European standard.
• ZUGFeRD 2.x is a hybrid PDF/A-3 carrying embedded XML. Accepted by most German B2B buyers and is the practical lowest-friction option for B2B invoicing today. Maintained by FeRD (Forum elektronische Rechnung Deutschland).
• Wachstumschancengesetz (Growth Opportunities Act) mandates structured B2B e-invoicing under EN 16931 in phases. Key dates: from 2025-01-01 every German B2B recipient must be able to receive structured e-invoices; from 2027-01-01 issuers above EUR 800,000 annual turnover must send structured e-invoices; from 2028-01-01 all B2B issuers must send them. PDF-only invoices for B2B sales become non-compliant.

If you are buying invoicing software in 2026, the question is no longer "can I send a PDF" but "can my app output a valid XRechnung XML and a ZUGFeRD PDF/A-3 without manual XML editing." Five of the six apps in our comparison answer yes. One does not.

The Six Apps: Comparison Table

Notes on pricing: prices are list prices for new customers as of Q2 2026, billed annually, excluding VAT. Monthly billing carries a 10-20 percent premium. Add-on modules (payroll, project time tracking) cost extra and are excluded.

Top Pick: sevdesk Buchhaltung Pro

sevdesk has been the German solopreneur default for five years and the 2026 release closed its remaining gaps. The reason it wins this comparison:

Feature walkthrough:

• One-click XRechnung XML or ZUGFeRD PDF/A-3 from any invoice template. The format toggle sits in the customer record, so a Bundesland ministry gets XRechnung and a local plumber gets a friendly PDF, with no manual reformatting.
• DATEV export bundles (DATEV-Format and DATEV Unternehmen online) include posting records, invoice scans, and OSS line items in one ZIP. Your Steuerberater gets a single upload per month.
• OSS module handles the EU one-stop-shop quarterly report. You flag a B2C invoice as cross-border, sevdesk applies the destination-country VAT rate, and the quarterly OSS XML is generated for upload to the BZSt portal.
• PSD2 bank reconciliation supports the 4,000+ German banks plus Wise, Revolut Business, N26 Business, Qonto, Holvi.
• Mobile receipt OCR (iOS, Android) extracts vendor, date, amount, VAT split, and tries to match the receipt to an existing transaction. Accuracy on German receipts (Lieferando, Rewe, DB Bahn) is around 85-90 percent.

Pricing tiers (2026):

• Rechnung: EUR 9.90/month, invoicing only, no accounting.
• Buchhaltung: EUR 17.90/month, adds bank reconciliation and DATEV export.
• Buchhaltung Pro: EUR 19.90/month, adds OSS module, multi-user, project time tracking.
• Buchhaltung Pro + Lohn: EUR 39.90/month, adds basic payroll.

Free trial: 14 days, no credit card. After day 15, your data is preserved for 6 months in case you return.

Runner-up: Lexoffice Buchhaltung & Berichte

Lexoffice (Lexware Office in the new branding) wins when your tax advisor has standardized on the Lexware-DATEV pipeline or when you want a single vendor for invoicing plus payroll plus elektronische Lohnsteuerbescheinigung. Pricing parity with sevdesk at EUR 19.90/month for the Berichte tier, but the OSS workflow is slightly more clicks. Bank reconciliation is solid. The mobile app is the weakest of the top three, especially OCR on faded thermal receipts.

Choose Lexoffice over sevdesk if:

• Your Steuerberater explicitly requests Lexware exports.
• You need built-in payroll for 1-5 employees and want a single subscription.
• You value the slightly more conservative UX (less feature creep than sevdesk's product page suggests).

When Billbee Wins

Billbee is not a general-purpose invoicing tool. It is an e-commerce order and invoice automation engine. If 80 percent of your invoices originate from Amazon DE, eBay, Etsy, Shopify, WooCommerce, Kaufland.de, or Otto Marketplace, Billbee will save you 10-20 hours per month versus sevdesk.

Billbee pulls every order, generates the invoice in your German numbering scheme, applies the correct VAT (with OSS treatment for cross-border B2C), and either sends the PDF/ZUGFeRD or hands it to sevdesk/Lexoffice for posting via the official integration. Pricing scales from EUR 9 (50 orders/month) to EUR 39 (10,000 orders/month).

VAT-Specific Features You Cannot Skip

German solo entrepreneurs in 2026 deal with four VAT scenarios. Your invoicing app must handle all four:

1. Standard 19 percent / reduced 7 percent domestic B2B and B2C. Trivial. Every app does this.
2. OSS one-stop-shop for cross-border B2C to EU consumers. Required when total cross-border B2C sales exceed EUR 10,000/year (combined across all EU countries). Your app must (a) detect the customer country, (b) apply destination VAT rate from a maintained table, (c) generate the quarterly OSS XML for upload to BZSt. sevdesk, Lexoffice, FastBill: yes. Billbee: yes (via integration). Zoho Invoice: manual only.
3. Reverse-charge B2B intra-EU (§13b UStG). When you invoice a French or Polish business with a valid VAT ID, you issue a zero-VAT invoice with the mandatory note "Steuerschuldnerschaft des Leistungsempfängers / Reverse charge." The app must verify the VAT ID via VIES and store the verification timestamp. All top picks do this; Zoho does the note but does not auto-verify VIES.
4. Kleinunternehmer §19 UStG. If you opted for the small-business rule (annual turnover below EUR 25,000 in the prior year and below EUR 100,000 in the current year as of the 2025 threshold update), every invoice must carry the note "Gemäß §19 UStG wird keine Umsatzsteuer berechnet." All apps support this with a profile toggle.

Compliance Gotchas Auditors Actually Find

• PDF-only B2B invoices after 2025-01-01. Your customer is now legally required to be able to receive structured e-invoices. You do not yet have to send them (until 2027 or 2028 depending on turnover), but a customer can demand structured format. Refusing means you risk the customer withholding payment. Switch to ZUGFeRD as your B2B default in 2026 even if not strictly required to issue.
• Missing mandatory Pflichtangaben. A German invoice must contain: full names and addresses of supplier and customer, issuer tax number or VAT ID, invoice date, sequential invoice number, quantity and nature of goods or services, delivery date, net amount, VAT rate and amount, gross total, and any special notes (Kleinunternehmer, reverse-charge, OSS). Missing any one of these can void the customer's VAT deduction.
• Sequential invoice numbering with gaps. Gaps trigger Finanzamt suspicion. If you delete a draft, the number is gone forever. sevdesk and Lexoffice handle this correctly by reserving numbers only on send.
• OSS threshold blindness. Once you cross EUR 10,000 cross-border B2C in a calendar year, every subsequent cross-border B2C invoice owes destination VAT. Many apps warn but do not auto-switch. Configure the threshold alert.
• Late B2B invoice. Germany requires invoice issuance within 6 months of the taxable supply for B2B. Late issuance is not penalised per invoice (unlike Italy's hard penalties) but the recipient's VAT deduction is delayed, which damages relationships.

Integration: DATEV, Banks, Marketplaces

Tax-advisor integration: All top three apps export DATEV-Format (the gold standard) and DATEV Unternehmen online (the cloud variant). sevdesk and Lexoffice both have direct DATEV connector add-ons that push monthly bundles automatically.

PSD2 bank reconciliation (top 10 German banks tested): Sparkasse network, Volksbanken (DZ Bank), Deutsche Bank, Commerzbank, Postbank, HypoVereinsbank, ING-DiBa, DKB, N26 Business, Holvi. All ten work with sevdesk and Lexoffice. Wise Business, Revolut Business, Qonto are also supported.

E-commerce marketplaces: Amazon DE, Amazon EU pan-European, eBay, Etsy, Shopify, WooCommerce, Kaufland.de, Otto Marketplace, Zalando Partner Program. sevdesk has native Shopify and Amazon connectors; for the long tail Billbee is the middleware.

Worked Example: 20 Invoices Per Month Solopreneur

Profile: Berlin-based freelance UX designer, 18 B2B invoices/month to German agencies plus 2 B2C cross-border to Austrian Etsy buyers for digital templates. Annual revenue EUR 75,000 net.

Total cost first year on sevdesk Buchhaltung Pro:

• Subscription: 12 × EUR 19.90 = EUR 238.80
• DATEV export to Steuerberater: included
• OSS quarterly XML: included
• Bank reconciliation (1 Sparkasse account + 1 N26 Business): included
• Total: EUR 238.80

Time saved per week vs manual Word + Excel:

• Invoice creation: 12 min → 2 min (template + customer recall). Saving: 10 min × 20 invoices/month = 200 min/month ≈ 50 min/week.
• Bank reconciliation: 90 min/week → 15 min/week. Saving: 75 min/week.
• OSS report quarterly: 4 hours → 30 min. Saving: 3.5 hours / 13 weeks ≈ 16 min/week.
• VAT pre-filing summary for Steuerberater: 60 min/month → 5 min/month. Saving: 55 min/month ≈ 14 min/week.
• Total weekly time saved: ~2.5 hours.

At a freelancer rate of EUR 80/hour, the EUR 238.80/year subscription pays for itself in three weeks.

Polish Reader Angle: Dual-Country Invoicing for a Polish Freelancer in Germany

If you are a Polish freelancer who relocated to Germany (or runs JDG in Poland while serving German clients), 2026 is the year your invoicing stack must cover both mandates:

• Poland: KSeF (Krajowy System e-Faktur) is mandatory for B2B from 2026-02-01 for large taxpayers (revenue above PLN 200 million in 2025), then 2026-04-01 for everyone else. Format: FA(2) structured XML. Regulator: Ministerstwo Finansów.
• Germany: XRechnung for B2G (since 2020), B2B receipt mandatory since 2025-01-01, issuance phased to 2028.

Practical setup: if your tax residence is Poland and you invoice German B2B clients, you issue a Polish FA(2) into KSeF and a ZUGFeRD PDF copy to your German client for their records. If your tax residence shifted to Germany and your JDG is closed, you switch to a German invoicing stack (sevdesk/Lexoffice) entirely. JPK_FA is no longer your concern.

For the awkward middle case (Polish JDG operator running a German GbR with a German co-founder), you run both sevdesk for the German entity and either Fakturownia or wFirma for the Polish JDG. The two ledgers must be kept strictly separate, with your Steuerberater on the German side and your księgowa on the Polish side talking to each other only at year-end.

This is exactly the kind of dual-country complexity where Freenance's Financial Freedom Runway view earns its keep: it lets you split your personal financial runway from your two business cash flows (German GbR and Polish JDG) so you can see at a glance how many months of personal expenses you can cover even if one of the two businesses stops paying you for a quarter. Financial Freedom Runway is the metric, not a feature flag: months of runway based on current net worth divided by average monthly personal burn, with business reserves shown separately.

FAQ

Q: Do I really have to send XRechnung XML to my German B2B clients in 2026? A: Not yet, unless your annual turnover exceeded EUR 800,000 in 2026. Then yes, from 2027-01-01. For everyone else, full issuance becomes mandatory from 2028-01-01. But your client can demand it now, and many large customers (Bosch, Siemens, public sector) already do.

Q: Is ZUGFeRD enough or do I need pure XRechnung? A: For B2B between private businesses, ZUGFeRD 2.x (hybrid PDF + XML) is accepted everywhere and complies with the Wachstumschancengesetz definition of structured e-invoice. For B2G (public-sector customers) you generally need pure XRechnung XML, although ZUGFeRD XRECHNUNG profile is also accepted by federal portals.

Q: Can I use Microsoft Word and a PDF printer in 2026? A: Technically for B2C and §19 Kleinunternehmer to B2C, yes. For B2B, no, after the staged rollout completes. For B2G, no, since 2020. The cost of a mistake (lost VAT deduction for your customer, retroactive corrections) outweighs the EUR 240/year for proper software.

Q: How does Kleinunternehmer §19 work in 2026? A: From 2025 the thresholds are EUR 25,000 prior-year turnover and EUR 100,000 current-year turnover. While Kleinunternehmer, you do not charge VAT and the invoice must say "Gemäß §19 UStG wird keine Umsatzsteuer berechnet." You can still send ZUGFeRD; the format does not change, only the VAT fields are zero.

Q: What if I miss the OSS quarterly deadline? A: OSS reports are due by the last day of the month after each calendar quarter (e.g. Q1 due by 30 April). Late filing triggers reminders from BZSt and eventually loss of OSS eligibility, which forces you to register for VAT in each destination country individually. Set a calendar reminder for the 25th of each quarter-end month.

Q: Which app is best for a complete beginner with five invoices a month? A: Zoho Invoice free tier or Lexware Office Free. Both let you grow into the paid tier. If you expect to scale to 20+ invoices/month and any cross-border activity, start on sevdesk to avoid migrating data later.

Disclaimer

This article is general information for entrepreneurs and freelancers in Germany. It is not tax, legal, or accounting advice. VAT rules, e-invoicing mandates, and software pricing change frequently. Always confirm current obligations with your Steuerberater or Finanzamt and verify pricing on the vendor's current product page. Nothing here constitutes a financial-services recommendation under KNF or BaFin rules.

Sources

• KoSIT (Koordinierungsstelle für IT-Standards), XRechnung specification
• FeRD (Forum elektronische Rechnung Deutschland), ZUGFeRD specification 2.x
• Bundeszentralamt für Steuern (BZSt), OSS one-stop-shop guidance
• Bundesministerium der Finanzen, Wachstumschancengesetz
• DATEV eG, DATEV-Format documentation
• sevdesk GmbH, Lexware (Haufe-Lexware), Billbee GmbH, FastBill GmbH, SumUp Invoices, Zoho Corporation product pages
• EU Commission, VIES VAT number validation service