Hotel supplier invoice checklist: price changes and duplicates

Supplier invoices often arrive through an accounting process designed to confirm approval and payment. A comparison review asks a different question: what changed since the previous invoice, and does the change have enough context? That question can be useful even before a property adopts purchasing or accounts-payable software.

Choose a small, comparable sample

Start with one or two recurring suppliers and a short sequence of invoices. Laundry, cleaning supplies, amenities, food and beverage, maintenance consumables or waste collection can work when the item and unit descriptions are reasonably consistent. Avoid mixing unrelated suppliers and departments in the first pass.

Record the invoice currency, whether amounts include tax, and the unit basis used for comparison. A carton, litre, kilogram and individual item are not interchangeable. Normalizing the unit first prevents a packaging change from looking like an unexplained price increase.

Keep the minimum useful fields

• supplier name and redacted invoice number;
• invoice and delivery date;
• purchase-order or approval reference, when available;
• item description, pack size, quantity and unit;
• unit price, tax basis and line total;
• new fees, credits or surcharges;
• previous comparable value;
• owner, explanation and next action.

Exclude bank details, employee details and information unrelated to the comparison when a working copy is shared outside the property's normal accounting workflow.

Run four focused checks

1. Recurring-item price changes

Compare like with like: the same item, pack size, unit and tax basis. Show both the absolute and percentage movement, then check the agreed price, effective date, promotion or contract note. A price increase can be valid; the first objective is to make it visible and explainable.

2. Possible duplicate invoices

Look for repeated invoice numbers and for combinations of the same supplier, date and total. Treat the result as a duplicate candidate, not a confirmed duplicate. Credits, corrected invoices, split deliveries and legitimate repeated amounts can create similar records. Confirm payment and document history before taking action.

3. New or changed fees

Separate delivery charges, fuel surcharges, minimum-order fees, environmental levies and other extras from the main item comparison. Record when the fee first appeared, whether it repeats and which agreement or supplier notice explains it.

4. Unusual quantities or pack sizes

A higher invoice total can come from consumption, not price. Compare quantities and pack sizes before escalating a cost change. When useful, add a simple operating context such as occupied rooms, covers, laundry kilograms or another property-approved driver. Do not force a ratio when the data is not genuinely comparable.

Use a review table that leaves the next action obvious

Do not turn every difference into a supplier dispute

Route the line to the person who owns the purchase or supplier relationship. They may know about a substitution, urgent delivery, contract change or credit that is not visible on the invoice. Record that explanation so the same item does not return as an unexplained flag next month.

Close each item with a reason

Use outcomes such as explained, credit expected, supplier question, internal process change or monitor next month. Add the owner and due date. The result should be a short action list, not another spreadsheet that nobody revisits.

This guide is operational information, not accounting, tax, procurement or legal advice. Confirm findings in the property's accounting records, agreements and approval process before changing or disputing a payment.