Effitrio — Freelance invoice checklist (Germany)
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Orientation only — not tax advice. Confirm with your advisor.

Required invoice fields (typical § 14 UStG checklist)
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[ ] Your full name / company name and address
[ ] Customer name and address
[ ] Invoice date
[ ] Unique sequential invoice number
[ ] Service description / line items
[ ] Quantity / unit price (if applicable)
[ ] Net amount
[ ] VAT rate and VAT amount — OR Kleinunternehmer § 19 note (no VAT)
[ ] Gross amount
[ ] Tax number and/or VAT ID (USt-IdNr.) as applicable
[ ] Payment terms / due date
[ ] Bank details (IBAN) if you collect via transfer

If reverse charge (EU B2B)
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[ ] Both VAT IDs
[ ] Net only (no German MwSt lines)
[ ] Clear reverse-charge wording

If e-invoice (ZUGFeRD / XRechnung)
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[ ] Structured data matches EN 16931 expectations of the buyer
[ ] Archive the structured file (not only a printout)
[ ] Buyer-required fields (e.g. Leitweg-ID for XRechnung)

Create invoices in Effitrio: https://effitrio.com/register
Free ZUGFeRD test generator: https://effitrio.com/de/tools/e-invoice-generator