MISMO’s new AVM Common Confidence Score: what you need to know

Historically, the US mortgage industry has lacked a common and consistent metric to demonstrate the reliability of AVM valuations at the property level. The lack of consistent metrics to compare AVM reliability across providers has created challenges such as increased collateral risk and inefficient valuation workflows.

To address this gap, the Mortgage Industry Standards Maintenance Organization (MISMO) introduced the AVM Common Confidence Score Standard and Guidance in September 2025. This new accuracy standard is designed to deliver a uniform and actionable metric for the industry that helps mitigate valuation inconsistencies and supports compliance with updated federal quality control regulations for AVMs.

In this blog, we provide a detailed overview of the new standard.

MISMO’s AVM Common Confidence Score is a probability metric that measures the likelihood an AVM’s valuation is within +/- 10% of the property's actual market value as of the valuation date. It helps provide a standardized estimate of the valuation probability that is centered around the Percent Predicted Error (PPE10) metric, a common industry standard that is utilized to understand AVM accuracy.

For example, an AVM Common Confidence Score of 85 indicates there is an 85% probability that the AVM's value is within +/- 10% of market value — providing a clear, actionable metric that can be universally applied. This allows AVM users to have a consistent threshold, defined at state levels and county levels.

Benefits of MISMO’s AVM Common Confidence Score include:

ICE is systematically rolling out MISMO’s new AVM Common Confidence Score across its valuation offerings to align with evolving industry standards and regulatory requirements. This will be available to our AVM customers in addition to the traditional ICE Confidence Score, which is built on proven methodologies, kept current through quarterly updates and validated rigorously at every stage — providing users with reliable metrics for every valuation. By combining the clarity of the AVM Common Confidence Score with ICE’s advanced analytics and validation capabilities, users are better equipped to manage risk, comply with regulations and drive efficiency across the property valuation lifecycle.