In effect: an invoice is paid or revenue sits in a closed period, so line items are read-only. Amend the contract to change them.
The invoice schedule: Unbilled invoices wait for their invoice date (send them, or let invoice automation send them).
| Invoice Number | Status | Invoice Date | Due Date | Billing period | Amount | Amount Due |
|---|---|---|---|---|---|---|
| INV000000498 | Paid | 03/01/2026 | 03/31/2026 | 03/01/2026 – 03/31/2026 | £6,100.00 | £0.00 |
| INV000000499 | Paid | 04/01/2026 | 05/01/2026 | 04/01/2026 – 04/30/2026 | £6,100.00 | £0.00 |
| INV000000500 | Paid | 05/01/2026 | 05/31/2026 | 05/01/2026 – 05/31/2026 | £6,100.00 | £0.00 |
| INV000000501 | Paid | 06/01/2026 | 07/01/2026 | 06/01/2026 – 06/30/2026 | £6,100.00 | £0.00 |
| INV000000502 | Paid | 07/01/2026 | 07/31/2026 | 07/01/2026 – 07/31/2026 | £6,100.00 | £0.00 |
| INV000000503 | Paid | 08/01/2026 | 08/31/2026 | 08/01/2026 – 08/31/2026 | £6,100.00 | £0.00 |
| INV000000504 | Paid | 09/01/2026 | 10/01/2026 | 09/01/2026 – 09/30/2026 | £6,100.00 | £0.00 |
| INV000000505 | Unpaid | 10/01/2026 | 10/31/2026 | 10/01/2026 – 10/31/2026 | £6,100.00 | £6,100.00 |