When are net 30 payments due?

Net 30 payments are due 30 days after the receipt of the invoice. This payment term is common in business transactions and establishes a clear timeframe for when payment is expected. By specifying that payment is due "net 30 days," it allows the buyer time to process the invoice and make arrangements for payment. The countdown begins from the date the invoice is received, which provides a specific and concrete timeline for both parties involved in the transaction.

The other options do not align with the net 30 payment structure. Payments due upon invoice issue would require immediate payment, which is not how net terms work. Similarly, payments due on the 1st of the following month or upon project completion do not fit the definition of net 30 as they do not specify a time frame based on the receipt of the invoice.