Construction invoices have specifics that generic templates ignore: the reverse charge, advances for materials, and line items that must match the estimate and the handover act.
The reverse charge
When both parties are VAT-registered and the work is a construction service, the reverse charge applies (Article 142 of the VAT Act): no VAT amount is shown and the recipient accounts for the tax. The invoice must carry a note about the reverse charge and both VAT numbers. See reverse charge invoice.
Estimate → invoice → act
Keep the same line names and units across all three documents, or the client's accountant will query the invoice and payment will slip. Build the estimate in the estimate generator and the handover in the act.
Advances and extras
Use an advance invoice for materials and offset it in the final invoice. Also state the site address, the contract reference and the period covered.