What Is IMI and Why Your Postage Meter Must Be Compliant in 2026

For organizations that rely on a postage meter every day, the equipment can easily become part of the background. Staff weigh the mail, select the service, apply postage, and move on to the next task. As long as the machine is working, there may be little reason to think about the technology behind the postage imprint.

That assumption can create a problem when an older mailing system remains in service longer than expected. The United States Postal Service has completed its transition away from older Information-Based Indicia technology, commonly called IBI, in favor of Intelligent Mail Indicia, or IMI. By 2026, IMI is no longer an upcoming postal requirement. It is the current standard for compliant postage evidencing systems.

Organizations still using older equipment should understand what IMI means, why USPS made the change, and how to confirm that their mailing operation is working with compliant technology.

What Is Intelligent Mail Indicia?

Intelligent Mail Indicia (IMI) is the current USPS standard used by approved postage evidencing systems to produce evidence that postage has been paid. Postage meters and PC Postage products fall under the USPS category of Postage Evidencing Systems, or PES. USPS regulates these systems under 39 CFR Part 501.

The indicia is the postage imprint generated by the system and applied to a mailpiece. IMI replaced the older Information-Based Indicia Program as USPS modernized the way postage transactions are recorded, secured, and communicated.

For a business mailroom, the technical change may be mostly invisible during daily use. Employees still process mail through a mailing system, but the technology behind that system provides USPS with more complete and timely transaction information.

That additional data is an important part of the IMI standard. USPS states that IMI Performance Criteria require more detailed transaction data, increased reporting frequency, and stronger security specifications.

What Happened to Older IBI Postage Meters?

The transition period has already ended.

USPS decertified Postage Evidencing Systems that did not meet IMI Performance Criteria on June 30, 2024. Those systems were required to be withdrawn from service by December 31, 2024. USPS also established June 30, 2025, as the final date after which postage indicia produced by decertified systems would no longer be recognized as valid postage for use or refunds.

That timeline changes the way businesses should think about IMI compliance in 2026. This is no longer a question of preparing for a future equipment deadline. A current business postage meter should already be operating on an IMI-compliant platform.

Organizations that replaced or upgraded their equipment during the transition may have already addressed the issue. Mailrooms using aging equipment, inherited systems, or equipment under older agreements should still verify the model and its compliance status with their postage equipment provider.

Why USPS Moved From IBI to IMI

The change was not simply a matter of replacing one postage imprint with another. USPS designed IMI to improve the information and security surrounding postage transactions.

According to USPS, the newer performance criteria provide more detailed transaction reporting and stronger security specifications. The standard also gives USPS a better foundation for functions such as automated postage refunds, pricing accuracy, regulatory reporting, and future updates to postage evidencing services.

For businesses, this means the postage meter is increasingly part of a connected mailing workflow rather than a standalone machine that simply prints postage.

Modern postage accounting software can also help organizations track postage usage across departments, users, or cost centers. For offices processing significant mail volume, that visibility can make it easier to understand where postage dollars are being spent and identify unusual usage.

How to Confirm Your Postage Meter Is IMI Compliant

Organizations that installed a current mailing system during or after the USPS transition are likely already working with IMI technology. Still, verification is worthwhile when equipment history is unclear.

Start by identifying the manufacturer and exact model of each postage meter in use. Confirm with the equipment provider that the system is approved under current IMI Performance Criteria rather than relying only on the age or appearance of the machine.

This is also a good opportunity to evaluate the rest of the mailing process. An outdated postage meter is sometimes a sign that other parts of the workflow have not been reviewed recently.

For example, addressing software can help improve address quality before mail enters production, while updated mailing systems can combine weighing, rate calculation, postage application, and mail processing in a more controlled workflow.

Organizations with more complex operations may also benefit from evaluating their broader mailing operations rather than replacing one piece of equipment in isolation.

IMI Compliance Is Also an Opportunity to Review the Mailroom

Compliance may be the immediate reason to evaluate a postage meter, but equipment decisions should also reflect how the mailroom operates today.

Mail volume may have changed. Departments may need better postage reporting. Staff may be spending too much time manually weighing or preparing mail. Shipping activity may also have grown alongside traditional letter mail.

In those cases, a review can extend beyond the postage meter. Shipping software may help centralize carrier workflows, while postage accounting tools can provide more visibility into spending and usage.

The objective is not to replace equipment simply because newer equipment exists. It is to make sure each part of the workflow fits the volume, staffing requirements, security expectations, and reporting needs of the organization.

Keep Your Mailing Operation Current

IMI is now part of the operating standard for business postage meters. The transition deadlines have passed, which means organizations using postage evidencing systems in 2026 should be working with equipment that meets current USPS requirements.

Lineage has more than 38 years of experience helping organizations evaluate mailing equipment, postage workflows, and document operations. Through Lineage Accelerate, our team can help determine whether your current mailing system fits both USPS requirements and the practical needs of your mailroom.

If you are unsure whether your current postage meter is IMI compliant or whether your mailing workflow needs an update, request a free business assessment. We can review your current process and help identify the equipment and workflow changes that make sense for your operation.