We require the ability to split the monetary amount (charge) of a single item or a total bill across multiple payment accounts or invoices. The current system only allows splitting products or payment transactions, not the value itself.

The current lack of charge splitting creates three major invoicing issues:

Shared Room Cost: It is impossible to split the cost of one room night (e.g., 1000 kr) equally between two guests (500 kr each) to generate individual receipts/invoices for their correct share.

Custom Amount Allocation: We cannot assign specific, custom amounts from a single total (e.g., 2000 kr total) to different invoices (e.g., 1500 kr to Company A, and 500 kr to Company B).

Equal Division: We cannot automatically or manually split the grand total of a booking equally between a set number of companies (e.g., dividing the entire cost equally among 3 firms).

This forces manual workarounds and prevents us from issuing correct, compliant receipts and invoices that match the customer's desired split.

The billing module must allow users to select a charge or total amount and specify how the monetary value should be split across two or more payment accounts (invoices, companies, or individual guests). This function must support both percentage and fixed amount splits.

Ensures 100% accurate invoicing, eliminates tedious manual accounting work, and provides correct documentation (receipts/invoices) to all paying parties.