The short answer: Architects and civil engineers create interim and final invoices according to HOAI service phases with Solobuch – including deduction of advance payments and XRechnung export for building authorities.
Architectural and civil engineering services demand the highest standards of transparency and auditability under German civil law (BGB) and the 9 HOAI service phases (LPH 1–9). Whether billing on eligible construction costs, fixed project fees, or hourly rates: Every interim, partial, and final invoice must clearly specify the fee zone, fee rate, agreed ancillary cost allowances, and previous payments received. Due to the nationwide e-invoicing mandate in Germany, invoices to public building authorities (B2G) must be transmitted as XRechnung with Leitweg-ID and in B2B transactions as ZUGFeRD. Solobuch creates audit-compliant architecture invoices in seconds. Create your invoices quickly, error-free and in a professional design with the Solobuch online generator.
💡 Tip for Architects: The invoice template contains all mandatory details according to §14 UStG, including tax number/VAT ID, invoice date, service period and unique invoice number.
Keep track of payments: invoice status and reminders from the Pro plan (9,99 € per month).
Everything you need to know about creating legally compliant invoices as a Architects.
Yes, you can use the invoice template for Architects completely free of charge and without registration as a PDF download or fill it out directly online in your browser.
A legally compliant invoice for Architects must contain your name/address according to § 14 UStG, customer details, tax number or VAT ID, invoice date, sequential invoice number, service description, date of performance, and total amount (including VAT or small business note according to § 19 UStG).
Solobuch supports GoBD-compliant bookkeeping: issued invoices cannot be changed (corrections only via cancellation invoice) and can be handed over via DATEV export. You remain responsible for retention and process documentation. Solobuch also supports the e-invoicing standards ZUGFeRD 2.3 and XRechnung phased in under the Growth Opportunities Act for seamless B2B export.
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