Below we will look at the setup of a subscription contract when we need to issue an invoice every quarter on the last day of the month, with the issue date and tax supply date (DUZP) set to the last day of the month. To help you navigate the setup process, I have included a diagram:
Example: A client signed a contract on January 1st with immediate effect. The billing period covers the entire quarter (January 1 – March 31). We want to create the invoice with a tax supply date and issue date set to the last day of the month. The generation date is April 1st.
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In the first step, we look at the billing period — in our case, January 1 – March 31. In the subscription contract, we fill in the dates on the Basic tab and also set the invoicing frequency (quarterly = value 3) on the Generation Settings tab:
The second step focuses on the turnover day and month, which determine the start of the billing period. On the Generation Settings tab, set the turnover day to 1 and the turnover month to 1:
In the next step, we decide whether to invoice in arrears or in advance. Since we are invoicing for a past period, we select the arrears option:
By selecting arrears, we have moved directly to step 5 in the diagram, which determines how many days before or after the end of the period we want to invoice. In this case, we set the value to 0 — meaning the invoice will be issued on the last day of the quarter (generation date: April 1st; issue date and tax supply date: March 31st):
Now we will set up the contract line items. Go to the Standard Contract Items tab and click Add. Here you can either select an item from the price list (the name and sales price will be carried over automatically) or enter the billing subject manually using the name field and checking the manual price checkboxes:
The subscription contract is now ready for generation. Save the contract and wait for the generation date, which we set to April 1st, then confirm by clicking the button in the toolbar:
An invoice will be generated with an issue date and tax supply date of March 31st, covering the period January 1 – March 31:
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If you want to test whether your settings are correct, you can generate invoices earlier, review them, and then revert the status. You can find out how to do this in the Introductory article on subscription contracts in practice.