Note
The Stage Invoice Package Checklist
The acceptance form comes back signed. The work is finished. Someone sends the invoice that afternoon.
Three weeks later, the accounts team sends a query. Two items are missing from the submission package. The invoice waits for next month’s payment run.
This is not a rare outcome. It is the standard outcome when invoice submission is treated as the final five minutes of a billing stage rather than a process that is prepared in parallel with the work. The accounts team reviewing your submission has no visibility of the site. They have a contract, a BOQ, and a list of what they need to match an incoming invoice to both. When any item on that list is absent, the invoice sits until the query is answered.
The goal is to send one complete package the first time, so the accounts team can process it without calling you back.
What does a main contractor’s accounts team actually check?
Accounts teams are not site people. Their job is to match an incoming invoice against the contract and the acceptance record, verify that the tax documentation is in order, and move the payment forward for approval.
To do that, five things need to align.
The contract reference: the invoice heading must name the contract, project, and stage in a way that matches what the main contractor’s system shows for this engagement. An internal job code that differs from the main contractor’s project reference creates a matching problem that someone has to resolve by phone.
The BOQ line reference: the work described in the invoice must map to the specific BOQ lines the stage covers. A description such as “partition work, zones A and B” without BOQ line numbers leaves the accounts team to do the matching themselves, which becomes a query.
The signed acceptance form: bearing the right signatory, the correct stage reference, and the inspection date. A form from the wrong person, or one with a missing stage reference, fails the check.
The invoice itself: issued on the correct company letterhead, with the right tax identification number and VAT status clearly stated.
The tax registration documentation: a copy of your VAT certificate or company tax ID, on file with the accounts team from project start, so the main contractor can process withholding tax correctly without a separate follow-up.
Which documents make up a complete submission package?
The short list: the signed acceptance form, a BOQ reference sheet, the invoice, and your tax registration documentation on file.
Some main contractors also request a delivery receipt or a site photo log for the period the stage covers. Confirming the exact requirements with the main contractor’s commercial team at project start removes the question from every subsequent submission.
The BOQ reference sheet is worth preparing for each stage before the acceptance form arrives. It lists each BOQ line covered by the stage, the item description as written in the contract, and the quantity confirmed. When the acceptance form arrives, the reference sheet is ready to attach. The accounts team matches the invoice to the contract without a call back to site.
What breaks when one item is missing?
The accounts team logs the invoice as incomplete and generates a query. While the query is open, the invoice sits. If the query lands after the main contractor’s payment cut-off date, the invoice waits a full cycle.
The time between sending an incomplete package and resolving the query is rarely less than a week. In most cases it is closer to 14 days, because the query goes to the wrong person first, or the missing document is in a folder that takes time to locate.
A payment ready to move this month waits until next month. Not because the work was wrong. Not because the acceptance form was invalid. Because one document was absent when the package arrived.
A worked example: two submissions, one stage type
A contractor submits stage 3 on two fit-out projects in the same week.
Project A’s package includes the signed acceptance form, a two-page BOQ reference sheet with contract line numbers, the invoice on correct company letterhead, and tax documentation already on file with the accounts team. The accounts team matches all items to the contract on day 2 and moves payment forward for approval on day 3.
Project B’s contractor sends the acceptance form and the invoice. The invoice description reads “interior partition and ceiling, level 4.” The accounts team cannot match it to the BOQ lines without pulling the contract. A query goes out on day 4. The response arrives on day 11. The invoice enters the following month’s run.
The gap between the two outcomes: one sheet of paper, prepared before the acceptance form arrived.
What to prepare before the first stage is invoiced
Confirm two things with the main contractor’s commercial team before any submission goes out: the exact document list they need for each invoice package, and the name of the accounts contact who handles queries on this contract.
With those two items, every subsequent submission follows the same checklist, and any query that does arrive goes directly to the person who can resolve it. The first submission also sets the precedent for whether your packages clear quickly or slowly over the life of the project.
FAQ
What format should BOQ line references appear in?
Use the line numbers as they appear in the signed contract, not internal job codes. Include the item description as written in the BOQ, the confirmed quantity, and the unit. One row per BOQ item. The accounts team matches against the contract document, not against your own reference system. If the numbers do not match exactly, the query goes out regardless of how clear your description is.
Can a verbal site acceptance substitute for a signed form while waiting for the form to arrive?
A verbal confirmation from the site team is sufficient to keep fabrication or installation moving, but it cannot be included in an invoice submission. The accounts team requires a document with a signature. If the site sign-off is delayed and the billing cut-off is approaching, follow up directly with the main contractor’s commercial manager, not the site engineer, and document the date the verbal acceptance was given. That record supports the timeline if a dispute arises over the submission date.
What if the main contractor does not issue a standard acceptance form?
Issue your own on company letterhead. State the project, stage, zones covered, the BOQ lines, the date of inspection, and include a signature line for the main contractor’s authorised representative with their position and date. A completed copy from your own form is treated the same as a main contractor’s standard form by most accounts teams, because the substance is identical. Confirm the format preference at project start.
If you want to run a current invoice package through this checklist before it goes out, a 45-minute call is the right starting point. We open one live submission together and check it against the contract before it leaves your desk.