Roofing supplier invoice verification: a job-by-job checklist

A supplier invoice can look reasonable in total and still contain a job allocation error, a different unit price, or a return that has not been credited. Checking only the total makes those differences easy to miss.

An effective invoice review compares the bill with the documents that explain what the company ordered, received, and agreed to pay. It also keeps unresolved differences visible until a person decides what to do.

This checklist is designed for roofing operations teams. Adapt the fields to your supplier agreements and accounting workflow. The examples are illustrative; they do not describe a Hibe customer’s results.

Build a complete review packet

For each invoice, gather the documents you actually use to approve a purchase:

• The supplier quote, price agreement, or other agreed pricing record.
• The purchase order or documented order approval.
• The delivery ticket and any record of what arrived at the job.
• The invoice, including its number, date, line items, and charges.
• Return tickets, credit notes, and earlier invoices for the same order.
• The job identifier and the person responsible for reviewing exceptions.

Keep a link to each document. A spreadsheet note that says “price wrong” is much less useful than a note that points to the agreed price and the invoice line in question.

If one document is missing, record that fact. Missing evidence is a reason to investigate, not proof that the supplier overcharged.

Confirm the supplier, invoice, and job

Check that the supplier name and account match the purchase. Then confirm the invoice number and job identifier before reviewing the arithmetic.

A duplicate can arrive through two channels: an emailed PDF and a portal download, for example. Compare invoice identifiers and source documents before treating the second file as a second bill. Do not rely on the file name alone.

For invoices covering several jobs, verify how each line is allocated. A correct company-wide total can still distort a job’s material cost if everything is assigned to one project. Keep unallocated lines in a review queue with an owner rather than guessing the job.

Compare quantities and units

Match each billed item to the order and the delivery evidence. Check both quantity and unit. A bundle, square, roll, pallet, and individual item are not interchangeable labels.

Record any agreed unit conversion next to the comparison. If the invoice is in a different unit from the order, normalize it before comparing prices. A price difference that disappears after a correct conversion should not remain flagged as an overcharge.

Distinguish ordered quantity from delivered quantity. A partial delivery may legitimately produce a partial invoice. The review should show what arrived, what remains outstanding, and which invoice relates to each delivery.

Check prices and additional charges separately

Compare the unit price with the pricing record that applied to the order. Preserve the agreement’s date and scope so a later price change does not silently replace the terms for an earlier purchase.

Then review delivery, handling, and other charges against the agreement. Treat tax calculation questions as a separate accounting review when needed; an operational checklist cannot resolve every tax treatment.

Here is a hypothetical price check. An order lists 10 rolls at $50 per roll, for a $500 line total. The invoice lists the same 10 rolls at $52, for $520. The difference is $20 before any applicable taxes or other charges.

That calculation identifies a difference. It does not establish its cause. The reviewer still needs to check whether the order changed, whether a different product arrived, or whether the invoice needs correction.

Reconcile returns and credits

A return ticket and a credit note are different records. The return documents what went back; the credit note documents the supplier’s adjustment. Neither should be assumed to have reached your accounting system simply because a file exists.

Link the return to the original delivery and the relevant invoice. Track whether the credit is requested, issued, applied, or still unresolved. If a credit appears on a later statement, retain that link so the original exception can be closed with evidence.

Avoid counting the same credit twice. An adjusted invoice and a separate credit note may refer to the same correction. Reconcile the supplier documents with the accounting entries before reporting a recovered amount.

Give every exception a reason and an owner

Use a short set of reasons your team can work with: possible duplicate, price difference, quantity difference, missing delivery evidence, wrong job, unexpected charge, or pending credit.

For each exception, record:

1. The affected invoice and line.
2. The comparison document and relevant value.
3. The amount in question, when it can be calculated reliably.
4. What remains uncertain.
5. The reviewer, next action, and review date.
6. The final decision and supporting document.

Send a clear question to the supplier when clarification is needed. “Invoice 123 lists 10 rolls at $52; our accepted order lists $50. Can you confirm the applicable price?” is more productive than a broad accusation.

Keep detection separate from approval. Software can surface a difference, but the reviewer should decide how it affects payment under the company’s established process. A missing attachment should not automatically become a rejected invoice.

Connect the review to job costs

After an exception is resolved, check that the approved amount and any credit reach the right job record. Otherwise, the invoice review and the margin report can continue to disagree.

Hibe offers invoice verification alongside AccuLynx and QuickBooks workflows. Before relying on a sync, confirm which records your setup reads, which records it updates, and who approves a correction.

Material adjustments can also affect a profit-based commission calculation. See the roofing sales commission tracking guide for a way to keep the calculation and its approval history explainable.

Start with a small, inspectable review

Choose one supplier and a manageable set of recent invoices. Review both clean invoices and known exceptions so the team can see what a normal match looks like.

Measure the number of invoices reviewed, unresolved differences, time to resolution, and corrections confirmed in the accounting record. Keep a suspected difference separate from a supplier-approved credit and from an adjustment actually applied. Those are different stages, not three amounts to add together.

Use the first review to improve document collection and responsibility. When the packet is complete and exceptions have owners, automation has a much better foundation. Talk with Hibe about your supplier documents, job records, and approval process to evaluate the fit.