How to read your invoice

Here is an example invoice that you might receive from the group:

It is clearly laid out but if you have any questions about any of the fields they are referenced in more detail in the table below

Field definitions

Use this table to validate invoices quickly and ensure smooth approvals and cash application.

Field	What it means	Example from invoice
Supplier	Legal entity issuing the invoice (who is to be paid)	OCU Energy Ltd.
Invoice Number	Unique ID for this invoice; include in payment reference for auto‑matching	OCU-INV-2025-0137
Invoice Date	Date the invoice was issued; starts the payment term clock	2025-10-15
Due Date	Latest date to pay without late fees or overdue status	2025-11-14
Bill To (Customer)	Customer legal entity responsible for payment	North Ridge Wind LLP
Customer Tax ID	Tax registration used to determine VAT/GST handling	VAT: GB987654321
Contract / PO	Reference to the governing contract or purchase order	EPC-ENG-PO-1197
Project	Project identifier to route costs and revenue correctly	North Ridge Wind Farm
Work Order	Operational reference for a defined scope or phase	WFE-2025-092
Description	Plain‑language description of the service or deliverable	Engineering Design Services (Phase 2)
Delivery/Service Period	Date range of services rendered or deliverables provided	2025‑09‑01 → 2025‑09‑30
Quantity / Volume	Measured amount delivered (e.g., hours, lots)	480 (hours) or “—” for fixed‑price lots
Unit	Measurement basis for quantity	Hours / Lot
Unit Price	Rate per unit for time & materials or itemized charges	£120.00 per hour
Amount	Extended line value (Qty × Unit Price) or fixed amount	£57,600.00 (line 1)
Reimbursable Expenses	Pass‑through costs billed as incurred (e.g., travel)	£3,980.00
Subtotal	Sum of all line items before tax	£108,830.00
VAT/GST	Applicable tax based on jurisdiction and tax status	VAT (20%) = £21,766.00
Total Due	Total amount payable, including taxes and credits	£130,596.00
Currency	Currency of settlement; must match PO/contract unless agreed	GBP
Payment Instructions	Bank details required to remit payment	Bank: Barclays • IBAN: GB12 BARC ... • SWIFT: BARCGB22
Remittance Reference	Reference to include with payment to speed cash application	Ref: OCU-INV-2025-0137
Notes / Terms	Terms like Net 30, dispute windows, or contact for queries	Net 30; disputes within 10 business days