Settlement – advance and final invoices

The ‘settlement’ invoice charges for the difference between the near-real-time (NRT) portfolio imbalance and the offline portfolio imbalance.

The settlement quantity is settled at the neutral gas price (NGP) twice a month.

The first time, the advance settlement invoice, is based on provisional allocations, known as version 3 allocations (incl. LDC_LALL V3).

The second time, the final settlement invoice is created, this happens four months after the first advance settlement. This invoice is based on finalised allocations, version 4 allocations (incl. LDC_LALL V4). Differences arising from the provisional allocation (advance invoice) are charged on the final settlement invoice.

On these invoices you will see an entry appear on the invoice appendix only for the days on which there is a difference between provisional and final allocations.

See the examples below.

You can check the advance and final settlement invoices on Gasport via ‘Historical’ -> ‘Balancing’ -> ‘Settlement’.

Then under ‘Time & Unit’ select the relevant time period, for which you want to check the settlement data, on the left.

In the summary you will see:

• The Near-real-time imbalance
• The Offline imbalance version 3
• The Advance settlement quantity (invoiced)
• The Offline imbalance version 4
• The Final settlement quantity
• The Delta settlement quantity (invoiced)

You will also see these details on the invoice specification to the corresponding advance settlement invoice or final settlement invoice.

If you want to check a specific hourly imbalance, you can click on the line for that specific hour. All Near-real-time and Offline allocations are then shown for that specific hour.