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Rechnungskit
Available now

E-invoicing to DATEV export on autopilot
for online shops, SaaS and direct sales in Germany

More than documents: finished bookings with revenue, fees and payouts.
Noticeably less work for your tax advisor (Steuerberater).

Free test mode · no credit card · cancel monthly
Connected to your stack StripeMolliePayPalUnzerGoCardlessKlarnaShopifyWooCommerceShopwareDATEVBZSt / OSSELSTER / ZM
Why Rechnungskit

Not just another PDF generator.

Classic invoicing software starts with an empty form. Rechnungskit starts with your payment: it reads it in, matches it to the order and turns it into an invoice automatically, which goes to your customer and into the export for your tax advisor.

Invoice RE-2026-0448
Bergmann Bürotechnik GmbH · Berlin
compliant
Mandatory fields under § 14 UStG complete
VAT 19.00% shown correctly
ZUGFeRD 2.5 (EN 16931) embedded
Number range continued without gaps
Gross €1,284.00
How Rechnungskit works

From payment to booking, fully automatic.

Payment providers
StripeMolliePayPalUnzerGoCardlessKlarna
Shop
ShopifyWooCommerceShopware
Your own API
REST & webhooks
Manual products
Sold via Rechnungskit Checkout: one link, one document
Tax matrix
Per line item: products, shipping, mixed cases (e.g. split tax on shipping)
1/6
E-invoice
In your design · RE-2026-0451 · 1.284,00 €
compliant 2/6
Sent to customers
In ZUGFeRD format, also via your own SMTP server
3/6
GoBD archive
Audit-proof archiving, 8 years
4/6
DATEV account coding
Accounts + tax keys, automatic
5/6
Export for your tax firm
DATEV EXTF · OSS export
6/6
Features

One system for everything that comes after checkout.

From checkout in your shop to the DATEV booking at your tax advisor's office, with no manual work in between.

E-invoice as ZUGFeRD
Standard invoices as ZUGFeRD 2.5 hybrids per EN 16931: a PDF with embedded XML. Eligible small-amount invoices (Kleinbetragsrechnungen) are archived as a separate, reduced document.
Validation before sending
Mandatory fields under § 14 UStG, tax rates and format rules are checked before the invoice reaches the customer. Errors land with you, not with the tax office.
DATEV export included
Revenue and payments as ready-made EXTF bookings: sales, fees and payouts assigned for your tax advisor, chart of accounts SKR03 or SKR04.
GoBD-compliant archive
Every document stored audit-proof for 8 years, immutable and exportable at any time, even after your contract ends.
OSS export included
EU sales totaled per country as a quarterly return for the BZSt portal (Federal Central Tax Office). We keep the tax rates per product category and country up to date.
Access for tax advisors & auditors
Role-based access: your team works in the app, and tax advisors and auditors download exports and the archive themselves. Read-only, with no email back-and-forth.
Payout reconciliation
Every Stripe or Mollie payout is broken down into payments, fees and refunds and matched against your invoices. You see unresolved items right away and clear them with one click.
Date of supply (Leistungsdatum), done right
Shipped goods are invoiced on the shipping date, not the payment date. If the recipient address is missing, § 33 UStDV applies only up to €250 total gross and never in § 3c, § 6a or § 13b UStG cases.
Deferred revenue (pRAP)
Deferred revenue for prepaid services: booked at invoicing, released monthly over the service period, ready for the DATEV export.
EU VAT rates, automatic
VAT rates per country and product category, taken from the EU's TEDB database and updated automatically every month. When a rate changes, Rechnungskit alerts you with a task and an email. Rates you set yourself stay untouched.
VAT ID checked and documented
Rechnungskit runs qualified checks of VAT IDs (USt-IdNr.) with the BZSt (company name, city, postal code, street) and archives the response unaltered for eight years, linked to the individual invoice and its delivery date. Without a usable check, Rechnungskit issues nothing as tax-exempt. The tax assessment remains your decision.
Open items & reminders
Buy-on-invoice under control: the invoice goes out at shipping, open items stay in view, and automatic payment reminders run on clear deadlines, with exceptions for key accounts.
Cancellations straight from the shop
Refund or cancellation in the shop? Rechnungskit creates the cancellation invoice (Storno) automatically, accurate to the cent even for partial refunds, as a separate correction document instead of a later edit. A returned direct debit reopens the receivable and does not cancel the invoice.
Vouchers with their own register
Single-purpose or multi-purpose? Rechnungskit tells voucher types apart under § 3(13) to (15) UStG: VAT at sale or only at redemption. A dedicated voucher register shows the open liability per voucher, with DATEV integration.
Checkout link
Sell your own products through a legally sound link: invoicing, GoBD and DATEV run automatically, and the payment goes through your own payment provider.
Checkout

Sell through a link, and the invoice writes itself.

A shareable payment link that uses your own payment provider. After the purchase, the GoBD-compliant e-invoice is created automatically, including DATEV export and webhook.

1 Product & link
2 Customer pays
3 Invoice goes out
Your own payment provider. Customers pay directly through:

One standard.
Zero edge cases.

Standard invoices from Rechnungskit are ZUGFeRD hybrids per EN 16931: a readable PDF plus machine-readable XML. Only an eligible small-amount invoice remains a reduced PDF/A document.

ZUGFeRD 2.5 Every invoice, every recipient live
One PDF/A-3 with embedded XML in a single file
Validated automatically before the invoice goes out
Archived audit-proof under GoBD

FatturaPA, PEPPOL or ebInterface? You don't need them: those formats only apply to sellers established in the respective country. Your invoice is valid across the EU.

Checked automatically before every send
Mandatory fields § 14 UStGBuyer address completeVAT ID checked (VIES)Tax rate correct per countryReverse charge detectedNumber range without gapsEN 16931 schema-validTotals and VAT consistentDate of supply setPDF/A-3 for archivingSmall-amount rule § 33 UStDVCancellation correctly referencedMandatory fields § 14 UStGBuyer address completeVAT ID checked (VIES)Tax rate correct per countryReverse charge detectedNumber range without gapsEN 16931 schema-validTotals and VAT consistentDate of supply setPDF/A-3 for archivingSmall-amount rule § 33 UStDVCancellation correctly referenced
Built and hosted in Germany
Developed in Germany, operated at Hetzner in Falkenstein. Backups encrypted in the EU, no third-country transfer.
Ready for any tax audit
GoBD archive with locked records, gapless number ranges and ready-made procedural documentation (Verfahrensdokumentation) to download.
DPA included
Data processing agreement under Art. 28 GDPR, signable directly in your account. View the DPA as PDF.
"We built Rechnungskit at Happy Coffee for our own use because no tool covered the whole path from our online shop through Mollie and Stripe to DATEV. It runs in our day-to-day business and has been through real tax audits."
Christian Häfner
Christian Häfner
Founder, Happy Coffee & Rechnungskit · About us
Triple-secured in two countries, encrypted and monitored around the clock. More about security →
FAQ

Frequently asked questions.

Since 2025, businesses in Germany must be able to receive e-invoices. From 2027, sending structured e-invoices (e.g. ZUGFeRD or XRechnung) for B2B sales becomes mandatory in stages, and a plain PDF will no longer be enough. Rechnungskit creates every invoice in the right format automatically.

Usually under an hour: connect a payment provider such as Stripe, Mollie or PayPal, connect order data from Shopify, WooCommerce or via API, and confirm the automatically detected mapping of products, tax rates and accounts once. From then on every invoice goes out validated. Historical data is imported as well.

No, it makes working together easier. Your tax advisor (Steuerberater) gets their own read-only access and downloads DATEV exports (SKR03/SKR04) and archive data themselves. Rechnungskit does not provide tax advice.

The GoBD archive keeps every document locked and audit-proof for 8 years (the statutory retention period for accounting records since the Fourth Bureaucracy Relief Act, § 147 AO), and number ranges are documented without gaps. Auditors get their own access on request, and the pre-filled procedural documentation (Verfahrensdokumentation) is ready to download.

Only in the EU: primary data center at Hetzner in Falkenstein (Germany), encrypted backups in Helsinki, security layer in Slovenia. No transfer to third countries, and you can sign the data processing agreement (AVV) under Art. 28 GDPR directly in your account.

The price follows your volume automatically: a €9 monthly base fee plus a small amount per document that drops as volume grows (from €0.15). There are no plans and no included quotas, so strong months cost a bit more and weak months less. Cancel monthly; details are on the pricing page.

Never touch an invoice again.

The e-invoicing mandate starts in 2027 and at first covers B2B only, but the standard is coming for everyone. Rechnungskit switches your online shop over today, automatically with every payment. Start free in test mode; you are only billed from go-live.

Start for free
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