Preparing information returns can consume valuable time during the busiest part of the year. Businesses must collect recipient information, verify taxpayer identification numbers, determine which payments are reportable, prepare accurate forms, meet recipient and IRS deadlines, and correct any errors that appear after filing.
The transition from the IRS FIRE system to the Information Returns Intake System, or IRIS, adds another consideration. Businesses that previously transmitted FIRE-format files must either establish a new filing process through IRIS or work with a provider that already has an approved IRIS transmission channel.
A 1099 outsourcing service handles the preparation and electronic filing process on the business’s behalf. Instead of purchasing software, applying for transmitter credentials, or learning a new IRS system, the business submits its information to an experienced filing provider that prepares the forms, obtains approval and transmits the returns through IRIS.
FIRE Is Retiring and IRIS Is Becoming Mandatory
The IRS is retiring the FIRE system after the 2026 filing season. Beginning January 1, 2027, IRIS will become the only IRS electronic filing system for information returns previously submitted through FIRE. This transition applies to current-year returns, prior-year filings and corrections. Existing FIRE users that intend to file directly must apply separately for IRIS access because a FIRE TCC does not automatically transfer to IRIS.
The Taxpayer Portal can be practical for businesses with a small number of returns. IRIS A2A is designed for automated and higher-volume filing and requires an A2A TCC, API Client ID, IRS schema implementation and successful Assurance Testing System transmissions.
Why IRIS A2A Is Usually Offered as a Filing Service
Developing an IRIS A2A connection involves considerably more than generating a correctly formatted file. The transmitter must build the software connection, implement IRS schemas and business rules, establish security credentials, complete IRS testing and maintain the system as specifications change.
The larger obstacle is that an approved A2A connection is tied to the identity and credentials of the organization acting as the transmitter.
A software developer cannot simply package its own TCC, API credentials and approved A2A connection with downloadable software for every purchaser to use. A business that purchases software and wants to transmit its own returns must establish its own authorization and credentials. It must connect those credentials to the software and complete the steps required to transmit through IRIS.
An outsourcing provider operates differently. The provider remains the authorized transmitter and uses its established A2A channel to submit returns for multiple clients. The clients provide their data and approve their forms, but they do not independently connect to the IRS.
This is why an established IRIS filing service is often more practical than standalone transmission software. The provider maintains the A2A infrastructure, monitors IRS changes, transmits the returns and retrieves the IRS acknowledgments.
What Is a 1099 Outsourcing Service?
A 1099 outsourcing service manages some or all of the information return filing process for a business.
A complete service may include:
- Importing payer and recipient data from Excel or CSV.
- Reviewing records for missing or inconsistent information.
- Preparing federal information returns.
- Generating PDF forms for client review.
- Transmitting approved returns through IRIS.
- Retrieving IRS acknowledgments.
- Explaining rejected records.
- Preparing corrections or replacement transmissions.
- Producing recipient copies.
- Printing and mailing recipient statements when requested.
The issuer remains responsible for providing accurate information and approving the final forms. However, outsourcing removes much of the software setup, data conversion, transmission and acknowledgment management from the issuer’s staff.
Common Forms Businesses Outsource
A 1099 outsourcing service may support numerous information return types.
Common Forms 1099
- Form 1099-NEC for nonemployee compensation.
- Form 1099-MISC for rents, prizes, awards and other miscellaneous payments.
- Form 1099-INT for interest income.
- Form 1099-DIV for dividends and distributions.
- Form 1099-R for retirement plan and IRA distributions.
- Form 1099-K for qualifying payment card and third-party network transactions.
- Form 1099-B for broker and barter exchange transactions.
- Form 1099-S for real estate transaction proceeds.
- Form 1099-SA for HSA and medical savings account distributions.
- Form 1099-LTC for long-term care and accelerated death benefits.
- Form 1099-PATR for taxable cooperative distributions.
- Form 1099-Q for qualified education program distributions.
- Form 1099-QA for ABLE account distributions.
- Form 1099-DA for reportable digital asset transactions.
IRIS currently supports a broad range of 1097, 1098, 1099, 3921, 3922, 5498 and W-2G returns. Form availability can vary by tax year and by filing provider.
Employee Stock Plan Reporting
Businesses and stock plan administrators may also outsource:
- Form 3921, reporting certain exercises of incentive stock options.
- Form 3922, reporting certain transfers of stock acquired through an employee stock purchase plan.
Retirement and Savings Account Reporting
Financial institutions, trustees, custodians and program administrators may outsource:
- Form 5498 for IRA contribution information.
- Form 5498-ESA for Coverdell education savings accounts.
- Form 5498-QA for ABLE accounts.
- Form 5498-SA for health savings and medical savings accounts.
How the Outsourced Filing Process Works
1. Submit the filing data
The client provides payer, recipient and payment information using an Excel worksheet, CSV file or another supported format.
Typical information includes:
- Payer or issuer name, address and EIN.
- Recipient name, address and TIN.
- Form type.
- Payment amounts.
- Applicable box numbers or codes.
- State withholding information, when required.
2. Review and prepare the returns
The filing provider imports the data and checks for missing required fields, invalid formats, duplicate records and other obvious inconsistencies.
3. Review the completed forms
PDF copies are generated so the client can review the issuer information, recipient information, amounts and form selections. The client approves the forms before they are transmitted or mailed.
4. Transmit through IRIS
The filing provider uses its approved IRIS A2A channel and transmitter credentials to send the returns to the IRS.
The client does not need to obtain an A2A TCC, request an API Client ID, complete IRS communication testing or maintain a direct system connection.
5. Retrieve the IRS acknowledgment
After transmission, the provider retrieves the IRS response and confirms whether the submission was accepted, accepted with errors or rejected.
Benefits of Outsourcing Instead of Filing Internally
No A2A development or testing
The client does not need to build an IRS connection, implement XML schemas or complete Assurance Testing System transmissions.
No separate transmitter setup
The filing service uses its own approved transmitter infrastructure. The client does not independently transmit through the provider’s credentials.
Forms available for review
Clients can examine the prepared forms before authorizing submission.
Assistance with IRS responses
The provider retrieves acknowledgments and helps interpret rejected records or transmission problems.
Support for multiple form types
A business can submit Forms 1099 along with related Forms 1097, 1098, 3921, 3922, 5498 or W-2G when the provider supports them.
Scalable filing
The same process can work for a small batch or thousands of recipients without requiring the client to add employees or maintain annual filing software.
Optional recipient mailing
The provider can prepare electronic recipient copies or arrange for printing and mailing when included in the service.
Originals, Corrections and Prior-Year Returns
An outsourcing service should support more than current-year original filings.
Common filing needs include:
- Late original returns.
- Incorrect payment amounts.
- Incorrect recipient names or TINs.
- Incorrect payer information.
- Changes to form or box information.
- Prior-year returns.
- Replacement transmissions after a file-level rejection.
IRIS supports tax year 2022 and later, including corrections, although availability depends on the specific form and tax year. After January 1, 2027, prior-year electronic returns and corrections previously handled through FIRE will also move to IRIS.
Combined Federal/State Filing
The Combined Federal/State Filing Program can forward certain federal information return data to participating states. However:
- Not every form participates.
- Not every state participates.
- Some states require direct filing.
- State thresholds and deadlines may differ from federal requirements.
For example, Form 1099-DA was excluded from the Combined Federal/State Filing Program for tax year 2025, so separate state reporting requirements could still apply.
Businesses should confirm whether their service includes state filing or only federal IRIS transmission.
Who Should Consider a 1099 Outsourcing Service?
Outsourcing can be especially useful for:
- CPAs and accounting firms filing for multiple clients.
- Payroll and bookkeeping companies.
- Businesses with numerous contractors or vendors.
- Financial institutions and retirement plan custodians.
- Employee stock plan administrators.
- Organizations filing several information return types.
- Businesses without employees trained in IRIS.
- Prior FIRE users that do not want to establish a new IRIS connection.
- Companies that need originals, corrections, prior years, printing or mailing handled through one provider.
Even businesses with relatively few forms may prefer outsourcing when they file only once per year and do not want to maintain internal filing software and IRS credentials.
Frequently Asked Questions
Do I need to purchase software?
No. A full-service outsourcing provider prepares and transmits the returns using its own filing system. You provide the data, review the forms and authorize the filing.
Do I need my own IRIS TCC or ID.me account?
Not when the provider is acting as the transmitter and filing through its own approved IRIS A2A channel. You would need your own IRIS access when filing directly through the Taxpayer Portal or operating as your own A2A transmitter.
Can I use my existing FIRE TCC with IRIS?
No. FIRE and IRIS use separate TCC applications. Existing FIRE credentials do not automatically authorize filing through IRIS.
Why can’t I buy software and transmit through the provider’s A2A account?
The provider’s TCC and API credentials identify the provider as the transmitter. They cannot be distributed to unrelated software customers for independent use.
A customer that wants to transmit directly must establish its own IRIS credentials and complete the required setup. With an outsourcing service, the provider remains the transmitter and files for the client.
Can prior-year returns and corrections be filed?
Yes. IRIS supports tax year 2022 and later, subject to form and year availability. A filing provider should confirm support for the particular form and tax year.
Can I review the forms before transmission?
Yes. A full-service process should provide completed forms for client review and approval before anything is transmitted.
What happens if a return is rejected?
The provider reviews the IRS response, identifies the reported error and explains what must be corrected. The repaired record can then be retransmitted.
Are recipient copies included?
Recipient copies can be generated electronically. Printing and mailing may also be available as an additional service.
Final Thoughts
A 1099 outsourcing service offers another path. The filing provider remains the authorized transmitter, maintains the IRIS A2A connection and handles form preparation, transmission and acknowledgment retrieval on the client’s behalf. Outsourcing can reduce internal workload while providing a clearer, more controlled filing process.
