Tolerance Rules and Variances for invoices

  • Release version: Australia
  • Updated March 12, 2026
  • 2 minutes to read
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    Summary of Tolerance Rules and Variances for invoices

    Tolerance rules in Accounts Payable Operations set permissible variance limits on invoices to ensure smooth and efficient payment processing. These rules determine acceptable differences between expected and actual invoice values without triggering exceptions. If variances exceed defined tolerance limits, exceptions are raised for review. Tolerance rules help prevent payment delays and maintain supplier relationships by allowing minor discrepancies within controlled thresholds.

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    Key Features

    • Line amount tolerance: Defines acceptable difference between expected and actual total amounts for specific invoice items or services. Invoices within this limit are valid for payment.
    • Line quantity tolerance: Sets acceptable variance between expected and actual quantities at the line level. Ensures invoices with slight quantity differences are processed without delay.
    • Line unit price tolerance: Establishes allowable difference between purchase order line unit price and invoice unit price, preventing small discrepancies from impacting payment.
    • Overbilling amount tolerance: Specifies maximum allowable overbilling amount at the invoice header level, allowing payment if within limits.
    • Over tax amount and under tax amount variances: Defines acceptable differences between supplier-provided tax and system-calculated tax amounts. If within tolerance, the supplier tax amount is copied to the final tax amount automatically.
    • Custom tolerance types and rules: Customers can create tolerance types to define variance thresholds and map them to invoice exception definitions to apply tailored tolerance rules.
    • Visibility and management: Tolerance details can be viewed at both header and line levels during invoice processing cases with exceptions, enabling informed decision-making.

    Practical Application for ServiceNow Customers

    ServiceNow customers can leverage tolerance rules to automate exception handling by defining acceptable invoice variances. By configuring and mapping tolerance types to exception definitions, customers ensure invoices with minor discrepancies are processed promptly, reducing payment delays and manual interventions. Visibility into tolerance and variance details supports effective exception resolution and payment accuracy.

    Tolerance rules define the limits set on an invoice to determine the permissible amount of variance that can be applied to an invoice before the invoice total exceeds the tolerance limit.

    The exception engine checks whether invoices with exceptions are configured with tolerance rules. You can customize tolerance rules of different types where the variance is compared with defined tolerance percentage and tolerance values. If the tolerance value exceeds the tolerance limit, exceptions are raised.

    Tolerance types

    Accounts Payable Operations supports the following tolerance types:
    • Line amount tolerance: Avoid payment delays by defining the acceptable difference between the expected and actual total amount for specific items or services of invoice. If the actual amount exceeds the expected amount but falls within this limit, the invoice is considered valid for payment.
    • Line quantity tolerance: Ensure easy payment processing by defining the acceptable range between the expected and actual quantities of items or services listed on an invoice. If the actual quantity exceeds the purchased quantity but remains within this limit, the invoice is considered valid for payment. This is a line level tolerance.
    • Line unit price tolerance: Prevent small discrepancies from impacting payment processing and supplier relations by establishing a tolerance range for the difference between the purchase order line unit price and the actual price of an invoice. When the actual unit price falls within this specified range, the invoice is ready to be processed for payment. This is a line level tolerance.
    • Overbilling amount tolerance: Defines the maximum allowable amount of overbilling between an invoice and the corresponding purchase order. If the actual amount exceeds the expected amount but falls within this limit, the invoice is considered valid for payment. This is a header level tolerance.
    • Over tax amount and under tax amount variances: Ensure smooth payment processing by defining an acceptable range between the supplier-provided tax and system-calculated tax amounts that allows minor differences within the defined tolerance range. If the supplier-calculated tax exceeds the system-provided tax but remains within the Over tax tolerance limit or the system-calculated tax exceeds the supplier-provided tax but remains within the Under tax tolerance limit, the invoice is considered valid for payment.
      Note:
      If tax amount variance for a tax line is within the tolerance range, then supplier tax amount will be copied over to final tax amount field by default.