Prepare the Invoice Details
Before opening the entry screen, gather the supplier invoice and any supporting purchase order, receiving record, contract, or approval. Confirm the vendor exists in Sage 100 and that the invoice has not already been recorded. Check the invoice number, date, terms, tax, freight, currency where applicable, and total amount.
Review the purchase with the team responsible for procurement if the invoice relates to a purchase order. Confirm that goods or services were received and that the amount agrees with the approved purchase documentation. This preparation helps the AP clerk enter the correct liability and route exceptions to the appropriate reviewer.
Enter the AP Invoice in Sage 100
In a typical Sage 100 workflow, open the Accounts Payable module and navigate to Invoice Data Entry. Start a new invoice batch or select the appropriate existing batch, based on your company’s procedures. Select the vendor number and enter the supplier’s invoice number, invoice date, invoice amount, and other required header information. Review the displayed payment terms and due date against the invoice and vendor setup.
Next, enter the invoice distribution. Select the appropriate general ledger account or accounts for the expense, inventory, asset, or other charge. Add distribution lines when the invoice covers multiple departments, cost centers, projects, or expense categories. Enter any applicable tax or freight amounts in the correct fields according to your configuration, and verify that the distribution total agrees with the invoice total.
Reliable invoice processing depends on capturing the source details accurately and checking the accounting distribution before posting. In workflows supported by AP Automation Software, invoice data validation and payment planning can be coordinated with the organization’s ERP controls.
Validate Matching and General Ledger Coding
Before completing the entry, compare the invoice with the purchase order and receiving record when applicable. This invoice matching review helps verify quantities, unit prices, and agreed terms. The review step known as AP Invoice Matching Approval confirms that the invoice aligns with the required supporting records before it moves forward under the organization’s approval policy.
Check gl coding carefully so each line posts to the correct expense, inventory, or balance sheet account. Confirm department and cost center assignments where your company uses them. The supporting guide invoice capture can help explain how source documents are converted into structured invoice details for validation and review. For additional context on transparent invoice status updates and supplier communication, consult How Vendor Portals Improve Invoice Transparency.
Review, Post, and Schedule Payment
Review the batch totals and individual invoice details before posting. Confirm that the invoice is assigned to the correct vendor and accounting period, the due date reflects the agreed terms, and all required approvals have been obtained. If your organization requires a separate payment release, posting the invoice does not itself authorize the funds to be released.
Once the invoice is approved and posted according to your workflow, Sage 100 updates the relevant Accounts Payable and general ledger records. The liability remains open until it is paid or otherwise settled. The separate Payment Approval step authorizes payment under company policy, while the payment run records the settlement. Retain the invoice and supporting evidence for reconciliation and audit purposes.
Common Checks and Best Practices
Use a consistent checklist for each invoice and investigate differences before posting. A documented Accounts Payable workflow helps staff understand how supplier liabilities are recorded and monitored. At period-end, review open invoices, confirm that transactions are assigned to the correct accounting period, and identify received services that may require accruals under the company’s accounting policy.
- Search for an existing invoice using the vendor and invoice number before creating a new entry.
- Verify invoice dates, terms, tax, freight, and total amount against the source document.
- Confirm that distribution lines balance to the invoice total and use the correct GL accounts.
- Check required matching and approval steps before posting or releasing payment.
- Reconcile AP balances with the general ledger and retain supporting documents.
Summary
To enter an AP invoice in Sage 100, open the appropriate Accounts Payable invoice entry screen, select the vendor, record invoice details, assign general ledger distributions, validate supporting documents, and follow your organization’s review and posting procedures. After posting, confirm the liability appears correctly and process payment through the authorized workflow. Consistent checks improve accounting accuracy, strengthen supplier relationships, and support reliable cash flow planning.