Software maintenance invoice

Invoice for Monthly bug fixes, Security patch deployment, Incident response.

Templates by industry

  • Monthly bug fixes
  • Security patch deployment
  • Incident response

Preparation guide

Document implementation scope, client-provided access and acceptance scenarios to distinguish completed development from operational handover.

Deliverables and line items
Monthly bug fixes, Security patch deployment, Incident response: record the quantities actually supplied and the service period.
Environment and dependencies
Record target systems, integration counts, data volume and who supplies test access.
Acceptance and support
Set acceptance scenarios, the review window, support duration after handover and excluded work.
Scope to agree
Record the billing month, resolved defects and patches, and incident-response time; identify new feature work separately.
  • Separate third-party service charges from implementation fees.
  • Agree who handles the production transition and what recovery work is included if it fails.
  • Match completed work to the order or approval record, and confirm the payment due date and amounts already received.

  1. Confirm scope and quantities

    Example: reconcile the approval and work record for "Monthly bug fixes" to establish the quantity for this invoice.

  2. Record delivery and acceptance

    Check completion for every line, including "Incident response". Deliver the agreed test results and configuration notes, and assign owners for outstanding items.

  3. Send the billing record

    Send the final charges, delivery reference and due date to the customer, then reconcile payment against the invoice number.