How Invoice Tolerance Works
During invoice processing, invoice details are compared with the related purchase order and, where required, receipt records. The system or reviewer evaluates differences against configured tolerance rules. If the variance is within the permitted range, the invoice may continue through the normal approval process. If it exceeds the threshold, the transaction can be routed for review according to the organization's controls.
For example, a company may permit a small unit-price difference while requiring explicit authorization for a larger increase. Quantity tolerance may be handled separately because receiving records determine how much inventory or service delivery has been confirmed. Finance teams should establish rules that reflect contract terms, purchasing policies, materiality, and the level of approval required.
Invoice Matching is the process of comparing invoice information with supporting purchasing and receipt records. Tolerance rules help determine whether the differences found during matching are acceptable under company policy or need further investigation.
Common Types of Invoice Tolerances
Invoice tolerance can be configured or applied to different transaction attributes, depending on the organization's Epicor setup. Common examples include:
- Price tolerance: Permits a defined difference between the invoiced unit price and the purchase order price.
- Quantity tolerance: Establishes acceptable differences between invoiced quantities and the quantities ordered or received.
- Amount tolerance: Defines an acceptable difference in the invoice line value or total invoice value.
- Freight and charge tolerance: Sets rules for delivery fees, surcharges, or other additional amounts.
- Tax tolerance: Supports review of differences between expected and invoiced tax amounts under applicable rules.
Each tolerance should have a clear business purpose. A percentage-based rule can scale with transaction size, while a fixed monetary threshold may be more appropriate for certain charges. Some organizations use both so that a difference must satisfy the relevant configured conditions.
How to Calculate and Apply a Tolerance
A common way to express a price or amount variance is to calculate the difference between the invoiced amount and the expected amount, then compare the result with the approved threshold.
Variance amount = Invoiced amount − Expected amount
Variance percentage = (Variance amount ÷ Expected amount) × 100
Assume a purchase order has an expected value of $5,000 and the supplier invoice totals $5,075. The variance amount is $5,075 − $5,000 = $75. The variance percentage is ($75 ÷ $5,000) × 100 = 1.5%.
If the company's applicable tolerance is 2%, the 1.5% variance falls within that illustrative threshold. If the tolerance is 1%, the variance exceeds the threshold and requires the next action defined by company policy. This example demonstrates the calculation; actual Epicor behavior depends on the configured rules and transaction context.
Using Tolerances in Purchasing and Accounts Payable
Invoice tolerance connects purchasing decisions with invoice review and payment authorization. In procurement, accurate purchase orders, approved price changes, and timely receipt entries provide the reference data needed for meaningful tolerance checks. Clear vendor management practices also help suppliers understand pricing terms, invoice requirements, and how to resolve discrepancies.
AP Automation Software can support invoice validation, matching, and payment planning by applying defined business rules throughout the workflow. In this process, invoice automation can assist with invoice capture, field extraction, validation, general ledger coding, approval routing, and posting, while tolerance rules help identify transactions that need a decision before proceeding.
The article Tailored Matching Policies: Optimize Vendor Invoice Processing explores how matching policies can be aligned with vendor type, transaction value, and general ledger account. This approach helps organizations apply suitable checks to different purchasing scenarios rather than treating every invoice identically.
When a variance is within the permitted range, the invoice still needs to satisfy any other required controls. Tolerance does not independently confirm that goods were received, that a supplier is authorized, or that an invoice is unique. Reviewers should preserve the supporting evidence and follow the relevant approval requirements before authorizing payments.
Best Practices for Setting Invoice Tolerances
Finance and procurement teams should document how tolerance values are selected, who can approve exceptions, and how rule changes are reviewed. Useful practices include:
- Set separate thresholds for price, quantity, and additional charges when their business implications differ.
- Use contract terms and historical transaction patterns to establish realistic thresholds.
- Define an escalation path for variances that exceed permitted values.
- Review recurring variance reasons to identify supplier, purchasing, receiving, or data-entry patterns.
- Retain approval records and supporting documents for audit and financial reporting.
Accounts Payable Matching Approval describes the authorization stage for matched invoice transactions, including the checks required before an invoice proceeds. Payment Matching Approval addresses approval within payment workflows and should follow the organization's payment controls. For suppliers tracking progress, How Vendor Portals Improve Invoice Transparency explains how invoice status information can support clearer communication during review. Accurate invoice capture and reference data also help reviewers apply tolerance rules consistently. The Invoice.com™ Guide 2025: Streamline US Invoice Workflows discusses invoice extraction, validation, matching, and posting as connected workflow stages.
Summary
Epicor Invoice Tolerance defines the acceptable difference between an invoice and its expected transaction value before further review is required. By setting suitable thresholds, calculating variances consistently, and linking exceptions to documented approvals, businesses can improve invoice accuracy, strengthen purchasing controls, maintain reliable financial records, and plan supplier cash outflows with greater confidence.