FIRE to IRIS Converter: Pub 1220 file to IRIS CSV for 1099-NEC, MISC, INT, DIV, R (offline, no record limit)

The IRS takes its last FIRE file on November 19, 2026. From January 1, 2027, 1099s can only be e-filed through IRIS, and IRIS does not accept the 750-character Publication 1220 file your payroll, AP or core system makes.

This converter turns that FIRE file into IRIS Taxpayer Portal CSV files in about a minute.

• Forms 1099-NEC, 1099-MISC, 1099-INT, 1099-DIV and 1099-R

• No record limit. Splits output into files of at most 250 returns, one form and tax year per file (IRS Pub 5717, Rev. 9-2026)

• Runs offline in your browser from a single HTML file. No install, no account, no upload. TINs never leave your computer

• Reconciles every C-record count and control total against the B records and against the IRIS output

• Splits individual names into first, middle and last using the FIRE name control

• Cleans names, addresses, cities, ZIPs, phones and TINs to IRIS formatting rules, and lists every change

• Flags 2026 NEC/MISC payments under the new $2,000 threshold, duplicates, missing TINs and bad state codes

• Maps foreign-tax country names to IRS country codes, and CF/SF state codes to state abbreviations

• Drop in the blank IRS templates from your portal and it uses their exact header rows, matching columns by name. That matters for tax year 2026, when the IRS added new NEC and MISC boxes

• Includes a command-line version (Node.js) for IT teams and a made-up 609-record sample file to try first

Free converters stop at 250 records and don't split files. Subscription tools cost hundreds of dollars a year. This one is $49, once.

Not included: corrected returns (IRIS corrections are done in the portal), other form types such as 1099-B, K, S, 1098, 5498 and W-2G, and foreign recipient addresses, which get flagged for you to finish by hand. This tool does not file returns and is not tax advice. Not affiliated with the IRS.