# Create loan contract one-time invoice parameters

Here are the parameters for the one-time invoice of the loan contract. Mandatory fields are marked with a red asterisk (<mark style="color:red;">\*</mark>).

<table><thead><tr><th width="250.21223958333331">Field name</th><th>Description</th></tr></thead><tbody><tr><td>Billing date <mark style="color:red;">*</mark></td><td><p>The date on which the invoice is issued.</p><p><strong>Note:</strong> This field is pre-filled and read-only.</p></td></tr><tr><td>Due date <mark style="color:red;">*</mark></td><td>Enter the invoice due date.</td></tr><tr><td>Description <mark style="color:red;">*</mark></td><td>Enter the additional invoice information.</td></tr><tr><td>Reason <mark style="color:red;">*</mark></td><td>Select the invoice reason from the dropdown menu.</td></tr><tr><td><strong>Billable components</strong></td><td><p>The billable components may include the following, depending on the product configuration and the current outstanding balance:</p><ul><li>principal (PRI);</li><li>interest (INT);</li><li>interest penalties (INT_P);</li><li>principal penalties (PRI_P);</li><li>service fees (BILLING_ADMINISTRATION_FEE)</li></ul></td></tr><tr><td>Invoice all?</td><td><p>Check the box to include all billable components in the invoice.</p><p><strong>Note:</strong> Individual components can also be checked or unchecked separately.</p></td></tr><tr><td>Identifier</td><td>The unique ID of the item.</td></tr><tr><td><p>Item type</p><p>Item subtype</p></td><td>The payment component type.</td></tr><tr><td>Uninvoiced amount</td><td><p>The amount that is not yet invoiced.</p><p><strong>Note:</strong> This field is pre-filled and read-only.</p></td></tr><tr><td>Amount by due date</td><td><p>The amount that is due by the specified date.</p><p><strong>Note:</strong> This field is pre-filled and read-only.</p></td></tr><tr><td>Invoice amount</td><td>The amount that would be invoiced.</td></tr></tbody></table>