Projects and monthly retainers: invoices go out on time
Invoice each project in FIZ. FIZ issues monthly retainers, such as consulting or social media management, on the day you choose and emails them to the client.
On an invoice to a client company, state the IRS withholding: 23% for consultants, advertising professionals and designers. The client pays you the total less the withholding and hands it to the State.
In FIZ, each payment that reaches the bank is matched to its invoice: you see which clients have paid and how much is still due.
Certified invoicingBank reconciliationInvoice FT 2026/078 · Client company
- Amount excluding IVA
- 1,500.00 €
- IVA (23%)
- 345.00 €
- IRS withholding (23%)
- −345.00 €
- To receive from the client
- 1,500.00 €
The client company hands the withholding to the State; in IRS, it counts as tax already paid.
Scheduled invoice creation
- Frequency
- Every month
- Next invoice
- 1 October 2026
- Invoice total
- 900.00 €


