Subcontract production invoices: reconcile the operation, quantity, and result

An outside processor's invoice may describe heat treatment, coating, machining, testing, or another operation rather than a new finished product. Match the bill to the production order and operation it completed. A purchase-order number alone may be insufficient when one production job passes through several vendors or one vendor batches work from several jobs.

Record the operation, material or semi-finished units sent, expected result, service-rate basis, and acceptance criteria. Identify whether the supplier is paid per unit processed, per acceptable unit returned, by weight, by batch, or by another measure. That choice determines the quantity to test against the invoice.

Microsoft's production-subcontracting documentation separates the purchased service from the associated material movements and production activity. The same distinction helps a manual review: the business needs to reconcile both what happened to its goods and what service it has agreed to pay for.

Start with the dispatch record to the processor. Include the product, lot, quantity, unit of measure, production-order reference, and date. When several jobs travel together, preserve the job-level breakdown even if the transport document shows one shipment total.

On return, separate accepted output, rejected output, goods awaiting inspection, and material still at the processor. Do not treat everything physically returned as completed acceptable work. A quality hold may leave the operation incomplete even though the warehouse has received the shipment.

In a hypothetical run, 1,000 parts are sent for coating. The supplier returns 940 acceptable parts and 35 rejected parts, while 25 remain with the supplier for further work. The full 1,000 is accounted for physically. The quantity payable depends on the agreed service terms, and the rejected 35 require a documented disposition rather than an automatic assumption that they are either free or fully chargeable.

Assume the illustrative contract charges $3 per accepted part and separately prices approved rework. The initial accepted-service amount for 940 parts is $2,820. An invoice charging all 1,000 parts at $3 creates a $180 difference to investigate under those terms. If the actual contract charges each part processed regardless of result, the same quantity comparison leads to a different conclusion.

Check minimum batch fees, setup charges, and volume tiers separately. A smaller accepted quantity does not necessarily reduce a fixed setup fee. Conversely, a supplier should not receive multiple setup charges for one combined run unless the agreement supports them. Record the basis and evidence for each fee.

Keep taxes, transport, consumables, and materials supplied by the processor distinct. A total invoice comparison can hide an incorrect service quantity behind an omitted freight charge. Approve or dispute the individual components and retain the supplier's calculation where a rate includes several elements.

A second pass through the processor can be additional work, correction of defective work, or a new customer-requested specification. Record which situation applies before accepting another service charge. The physical movement may look similar, but the commercial responsibility can differ.

Link the rework authorization, affected quantities, original operation, supplier acknowledgment, and final result. If the supplier issues a credit for the first pass and charges a replacement operation, ensure both documents reach the same review. Paying the new invoice while overlooking the credit can overstate job cost.

Count final output once. A part processed twice is still one part in the completed production quantity. The extra service cost may be relevant to variance analysis, but it should not increase the denominator used to calculate cost per good unit. Retain the rework event as separate activity so management can see its cause.

The processor may hold materials your business already owns. An invoice for processing should not create a second purchase of those materials unless the arrangement actually includes such a sale. Reconcile ownership and material movements separately from the service cost.

For an illustrative job, suppose existing material cost is $10,000, accepted processing cost is $2,820, and approved transport cost is $380. The defined total before other costs is $13,200. Adding the supplier's stated $10,000 custody value as another purchase would double the material component. A custody valuation can be useful without representing an amount payable.

Have the accounting reviewer apply the approved production-cost and inventory policies to accepted charges and any abnormal losses. Operational reason codes should describe the facts, while accounting classifications follow the applicable framework. A label such as rework does not by itself determine where the cost belongs in financial statements.

List production work still with each processor and reconcile it to dispatches, returns, and confirmations. Identify services completed but not invoiced, invoices received before acceptance, and disputed quantities. The accounting preparer can then assess the appropriate cutoff and accrual treatment from supported facts.

Ask the production owner for the next expected event on open items: inspection, further processing, return, disposal, or commercial settlement. An old balance described only as at supplier gives little indication of whether the job will finish or whether a claim is developing.

Retain the processing agreement, movement records, acceptance evidence, invoices, credits, and approvals together. IRS guidance recognizes invoices and underlying transaction documents as support for business records. The finished review should explain the quantity sent, where every unit ended up, which service amount was accepted, and how that cost entered the production job once.