Are you still using the IRS FIRE (P1220) system to file information returns? The IRS is retiring the FIRE in December 2026, which means businesses must prepare for a full migration to the newer IRIS filing system. 
 
If your organization submits forms such as 1099, 1098, 5498, W-2G form or other information returns, this transition is not optional—it is a required change that will affect how you prepare, validate, and send your tax filings. 
 
The good news is that this transition doesn’t have to be complex. TaxZerone makes the process easier by accepting your current FIRE files, converting them into IRIS-compatible XML, checking the records for errors, and securely sending them to the IRS. 

Table of Contents 

• Understanding the FIRE to IRIS Transition 
• FIRE vs IRIS: Key Differences 
• Why Is the IRS Retiring the FIRE System?
• What the Transition Means for You 
• How TaxZerone Simplifies the FIRE to IRIS Transition.
• Why Early Preparation Matters? 
• Conclusion

Understanding the FIRE to IRIS Transition 

For many years, FIRE has been the standard platform used by businesses and filers to electronically submit information returns to the IRS. These filings were done in a fixed-width text format. IRIS is changing this process by requiring XML-based submissions, which include more accurate validation and stronger compliance controls. 

FIRE vs IRIS: Key Differences 

Understanding what actually changed between FIRE and IRIS is essential for scoping your transition. The differences go deeper than a file format change — they affect how filings are submitted, validated, and confirmed by the IRS. 

FIRE System (Retiring Dec 2026)	IRIS System (Required from Jan 2027)
Fixed-width ASCII per Publication 1220	XML-based structured data
Files may receive an accepted or rejected status after IRS processing	Submission acknowledgment includes error codes
Single manual file upload	IRIS supports both API and portal-based filing depending on filer type
No longer accepted	IRIS is becoming the primary intake system for information returns
Supports Combined federal/state filing	Supports Combined federal /state filing

Why Is the IRS Retiring the FIRE System?

The IRS is modernizing its information return filing infrastructure to improve efficiency, security, and filing accuracy. 

The FIRE system has served businesses for years, but newer compliance standards require a more advanced filing platform. 

IRIS offers: 

• Better validation checks 

• Improved submission accuracy 

• Stronger security controls 

• Enhanced filing visibility 

This modernization benefits filers in the long run—but transitioning can be complex without the right filing partner. 

What the Transition Means for You 

The sunsetting of FIRE introduces several shifts in data preparation and compliance that every filer must manage immediately.  

• Your Old FIRE TCC Will Not Work 

Even if you have used the same Transmitter Control Code (TCC) for ten years, it will become obsolete on December 31, 2026. Every filer submitting directly to the IRS must apply for an IRIS TCC via the IRS Taxpayer Portal.  

• Stricter Data Validation (The “Name Field” Trap) 

Under the legacy FIRE format, if a recipient’s name was slightly unformatted or crammed into a single text block, the system would often still accept the file. IRIS is built with rigid XML schemas. For example, it strictly requires separate data fields for a recipient’s first and last name. If your internal data source maps names incorrectly, IRIS will reject the entire file.  

• The Dual-Filing Challenge (Federal vs. State) 

While the federal government is mandating the jump to IRIS, most individual U.S. states are still lagging behind and utilize the old FIRE file format for state-level reporting. This creates a complex “dual-filing” reality where businesses may have to format data one way for the IRS and another way for their state agency 

How TaxZerone Simplifies the FIRE to IRIS Transition.

Migrating from FIRE to IRIS can be challenging for businesses that rely on existing filing systems. Updating internal software, modifying file formats to meet XML requirements, and reviewing data for compliance can require significant time, effort, and technical resources. 

This is where TaxZerone helps simplify the transition. 

• System-Ready Mapping 
  TaxZerone helps prepare your filing data to meet IRIS requirements by ensuring records are structured correctly before submission. This includes organizing data fields properly and identifying issues early to reduce filing errors. 

• Dual-Filing Management 
  Managing both federal and state filing requirements during the transition can be challenging. TaxZerone helps simplify this process by supporting filing workflows that align with evolving IRS requirements while maintaining compatibility with existing state reporting needs. 

• Simplified Compliance Management 
  TaxZerone provides an easy-to-use platform that helps businesses manage filings more efficiently. By reducing technical complexity and streamlining workflows, businesses can focus more on filing accurately and staying compliant.  

Want to see the process in action? Read our detailed guide on How to Quickly Upload IRS FIRE-Formatted (P1220) 1099 Files to IRIS Using TaxZerone to learn how you can upload your existing FIRE files, convert them to IRIS-compatible XML, validate your data, and submit your returns with TaxZerone.

Use Case: Payroll Provider Managing High-Volume 1099 Filings 

Consider a payroll provider that files 25,000 Form 1099 records annually through the IRS FIRE system. 

Their current workflow is built entirely around generating fixed-width FIRE files and uploading them for submission. With the IRS retiring FIRE in December 2026, this existing process becomes obsolete. 

Migrating to IRIS introduces several challenges: 

• Existing FIRE files are not directly compatible with IRIS 

• Manual XML conversion increases complexity 

• Validation errors may delay filing 

• Compliance risk rises during peak filing season 

Instead of redesigning their filing workflow from scratch, the provider uploads their existing FIRE files into TaxZerone. 

TaxZerone automatically converts those files into IRIS-compliant XML, validates records for IRS requirements, flags errors before submission, and securely submits filings through IRIS. 

This allows the provider to transition smoothly without disrupting operations. 

Why Early Preparation Matters? 

The IRS will officially retire the FIRE system in December 2026. After this date, FIRE submissions will no longer be accepted. 

Businesses that fail to transition in time may face: 

• Filing disruptions 

• System compatibility failures 

• Increased compliance risk 

• IRS penalties for late or incorrect filings 

Early preparation significantly reduces operational risk and ensures uninterrupted filing processes. 

Conclusion  

The retirement of the FIRE system marks a significant transformation in IRS information return filing. Businesses must begin preparing now to ensure a smooth transition before the December 2026 deadline. 

While the shift to IRIS introduces technical and operational challenges, it also brings improved accuracy, better validation, and enhanced security. 

With TaxZerone, organizations can seamlessly transition from FIRE to IRIS without changing their existing workflows. By automating file conversion, validation, and submission, TaxZerone ensures a simple, secure, and compliant filing experience.