Verify Your TIN with IRS Database
A TIN Check confirms whether a taxpayer's name and Taxpayer Identification Number match IRS records, so you can catch errors before a 1099, W-2, or ACA form is ever filed. Run a one-off IRS TIN Check online, or automate the process at scale with our TIN Check API.
Sandbox Available
IRS-Authorized Provider
REST API with JSON Responses
app.expresstincheck.com/dashboard
TIN Matching Requests
+ New
SUBMITTED
1,204
MATCHED
1,180
PENDING
24
NAME
TIN
STATUS
Acme Consulting LLC
12-1231234
MATCH
Bright Path Vendors
45-6789012
MATCH
Nolan & Ortiz LLC
98-7654321
PENDING
Summit Freight Co
23-4561789
NO MATCH
View all requests →
Match Confirmed
Encrypted Request
What Is a TIN Check ?
A TIN Check is the process of confirming that a taxpayer's name and Taxpayer Identification Number (TIN) match IRS records. It can be run one at a time through an online lookup, or automated at scale through a TIN Check API that returns a match, no-match, or unable-to-match result.
Instead of manually checking each payee's information or waiting until after a return is filed to discover an error, a business can call the API directly from its own software, payroll system, or accounting platform. The API returns a real-time result, typically within seconds, so the name and TIN can be corrected before any IRS form is submitted.
An IRS TIN Check is commonly used by software providers, payroll companies, and accounting firms that need to verify large volumes of payee information automatically, rather than checking each record one at a time through a manual portal.
Why Is an IRS TIN Check Important?
An IRS TIN Check is important because it helps businesses catch Name and TIN mismatches before filing, which reduces rejected returns, IRS B Notices, and the cost of manual corrections.
Avoid Rejected Filings
A mismatched name and TIN can cause the IRS to reject an information return outright, requiring it to be corrected and resubmitted.
Prevent B Notices
When a mismatch is discovered after filing, the IRS may issue a B Notice,
requiring the payer to follow up with the payee directly.
Reduce Filing Delays
Catching mismatches early means corrections happen before a deadline, not after,
which keeps the overall filing process on schedule.
Lower Compliance Risk
Verifying taxpayer information in advance reduces the manual review burden and the risk of penalties tied to incorrect information returns.
Who Should Use TIN Verification?
TIN Matching is relevant to any organization that files IRS information returns on behalf of itself or its clients, or that builds software used to do so.
Software Companies
Platforms Filing on Behalf of Users
Any platform that generates 1099 or W-2 forms for its users benefits
from verifying TINs automatically through an API.
Developers
IRS Compliance Integrations
Developers building tax or compliance features use a REST API with JSON responses for straightforward integration.
Payroll Providers
Payroll & HCM Platforms
Payroll providers verify employee and contractor TINs in bulk before W-2 and 1099 season.
Accounting Firms
Tax Professionals & Bookkeepers
Firms filing returns for multiple clients use TIN Matching to confirm payee data before each filing cycle.
Businesses
Issuers of 1099 & W-2 Forms
Any business issuing information returns to
contractors or employees can verify TINs before filing season begins.
ERP & HRIS Providers
Enterprise Systems
ERP and HRIS platforms integrate TIN Matching directly into vendor and employee onboarding workflows.
ACA Filers
Employers Filing ACA Forms
Organizations filing ACA information returns use TIN Matching to confirm covered individuals' taxpayer information.
How ExpressTINCheck Works
IRS TIN Matching works by submitting a Name and TIN combination to the IRS for comparison against its records. Standard TIN Matching results are typically returned within 24 hours and indicate whether the combination matches, does not match, or could not be matched due to missing data.
1
Submit the Name and TIN
A business submits one or more recipients' name, TIN type (SSN, EIN, or ITIN), and TIN through the API, either individually or as a batch.
2
We Send the Request to the IRS
Each submitted name and TIN combination is forwarded to the IRS for verification against its records.
3
The IRS Returns a Result
Standard TIN Matching results are typically available within 24 hours. The result is delivered automatically through a webhook once the IRS has processed the request.
4
The Business Takes Action
If a mismatch is returned, the business follows up with the payee to correct the information before filing the return with the IRS.
Key Benefits of a TIN Check API
Verifying taxpayer information through an API, rather than a manual lookup tool, gives a business the ability to build TIN Matching directly into its existing systems and workflows.
Standard TIN Matching
Submit Name and TIN combinations in bulk and receive results from the IRS within 24 hours, delivered automatically by webhook.
Instant TIN Matching
For businesses where immediate verification is critical, such as onboarding contractors or vendors, a real-time matching option is available on request and reduces exposure to backup-withholding triggers and IRS notices.
Direct Software Integration
A REST API with JSON requests and responses fits into existing payroll, accounting, or ERP software without manual data entry.
Sandbox Simulation
A sandbox environment lets developers simulate the full TIN Matching flow before submitting live requests.
response.json
// Sample request submission response
{
"SubmissionId": "54d2226b-c8ae...",
"TINMatchingRecords": {
"SuccessRecords": [
{
"Name": "Acme Consulting LLC",
"TINType": "EIN",
"TIN": "12-1231234",
"Status": "ORDER_CREATED",
"NumOfAttemptsRmng": 2
}
]
}
}
// Final match result is sent via webhook
TIN Matching Improves Filing Accuracy Across Form Types
TIN Matching is not limited to a single IRS form. It supports accuracy across the information returns most commonly affected by name and TIN mismatches.
Form
Used For
Why TIN Matching Helps
Form W-9
Collecting payee TIN before payment
Confirms accuracy at intake, before any reporting occurs
Form 1099
Reporting non-employee income
Reduces mismatches across NEC, MISC, and other 1099 variants
Form W-2
Reporting employee wages
Verifies employee name and SSN before annual filing
ACA Forms
Reporting health coverage information
Confirms covered individuals' taxpayer information before filing
Why Choose ExpressTINCheck
IRS-Authorized
Built specifically for IRS TIN Matching and information return compliance.
Built for Speed
Real-time matching designed to fit into existing software workflows.
Secure by Design
Authenticated API requests help keep taxpayer data protected throughout the
process.
Developer-Friendly
Clear documentation and sandbox testing support a straightforward integration
process.
Frequently Asked Questions
Why is an IRS TIN Check important?
+
An IRS TIN Check helps ensure that taxpayer information is accurate before filing information returns such as Forms 1099. Verifying TINs in advance minimizes IRS notices, backup withholding issues, and costly corrections while improving filing accuracy.
How do I check a TIN with the IRS?
+
A TIN Matching API securely sends the taxpayer's TIN to the IRS TIN Matching program. The IRS validates whether the information matches its records and returns the verification result, allowing businesses to identify mismatches before filing tax forms.
Can I verify multiple TINs at once?
+
Yes. Most TIN Matching APIs support bulk verification, allowing businesses to validate hundreds or thousands of taxpayer records in a single process. This is especially useful during year-end filing season.
Is an online TIN Check secure?
+
Yes. A reliable TIN Matching API uses encrypted communication, secure authentication, and industry-standard security practices to protect sensitive taxpayer information during transmission and processing.
Why should I verify a TIN before filing?
+
Yes. A TIN Matching API is designed for easy integration with payroll, accounting, ERP, HR, fintech, and tax software, allowing developers to automate taxpayer verification within their existing workflows.
Who should use a TIN Matching API?
+
Software companies, payroll providers, accounting firms, ERP and HRIS platforms, and any business that files W-2, 1099, or ACA forms can benefit from using a TIN Matching API.
How does ExpressTINCheck help verify taxpayer information?
+
ExpressTinCheck offers Standard TIN Matching for bulk verification with results delivered by webhook, and Instant TIN Matching for qualifying businesses that need real-time results, all through a REST API with JSON requests and a sandbox for testing.
Get Started Now
Review the API documentation and request body format to see how TIN Matching fits into your existing filing or payroll workflow.
Get Started Now
Copyright © 2026 expresstincheck.com. All rights reserved.expresstincheck.com is proudly owned and managed by SPAN Enterprises LLC, 2685 Celanese Road, Suite 100, Rock Hill, SC 29732.
TIN Check: Verify Taxpayer Identification Numbers Against IRS Records
A TIN Check confirms whether a taxpayer's name and Taxpayer Identification Number match IRS records, so you can catch errors before a 1099, W-2, or ACA form is ever filed. Run a one-off IRS TIN Check online, or automate the process at scale with our TIN Check API.
Sandbox Available
IRS-Authorized Provider
REST API with JSON Responses
app.expresstincheck.com/dashboard
TIN Matching Requests
+ New
SUBMITTED
1,204
MATCHED
1,180
PENDING
24
NAME
TIN
STATUS
Acme Consulting LLC
12-1231234
MATCH
Bright Path Vendors
45-6789012
MATCH
Nolan & Ortiz LLC
98-7654321
PENDING
Summit Freight Co
23-4561789
NO MATCH
View all requests →
Match Confirmed
Encrypted Request
What Is a TIN Check ?
A TIN Check is the process of confirming that a taxpayer's name and Taxpayer Identification Number (TIN) match IRS records. It can be run one at a time through an online lookup, or automated at scale through a TIN Check API that returns a match, no-match, or unable-to-match result.
Instead of manually checking each payee's information or waiting until after a return is filed to discover an error, a business can call the API directly from its own software, payroll system, or accounting platform. The API returns a real-time result, typically within seconds, so the name and TIN can be corrected before any IRS form is submitted.
An IRS TIN Check is commonly used by software providers, payroll companies, and accounting firms that need to verify large volumes of payee information automatically, rather than checking each record one at a time through a manual portal.
Why Is an IRS TIN Check Important?
An IRS TIN Check is important because it helps businesses catch Name and TIN mismatches before filing, which reduces rejected returns, IRS B Notices, and the cost of manual corrections.
Avoid Rejected Filings
A mismatched name and TIN can cause the IRS to reject an information return outright, requiring it to be corrected and resubmitted.
Prevent B Notices
When a mismatch is discovered after filing, the IRS may issue a B Notice,
requiring the payer to follow up with the payee directly.
Reduce Filing Delays
Catching mismatches early means corrections happen before a deadline, not after,
which keeps the overall filing process on schedule.
Lower Compliance Risk
Verifying taxpayer information in advance reduces the manual review burden and the risk of penalties tied to incorrect information returns.
Who Should Use TIN Verification?
TIN Matching is relevant to any organization that files IRS information returns on behalf of itself or its clients, or that builds software used to do so.
Software Companies
Platforms Filing on Behalf of
Users
Any platform that generates 1099
or W-2 forms for its users benefits
from verifying TINs automatically
through an API.
Payroll Providers
Payroll & HCM Platforms
Payroll providers verify employee
and contractor TINs in bulk before
W-2 and 1099 season.
Accounting Firms
Tax Professionals &
Bookkeepers
Firms filing returns for multiple
clients use TIN Matching to
confirm payee data before each
filing cycle.
ERP & HRIS Providers
Enterprise Systems
ERP and HRIS platforms integrate
TIN Matching directly into vendor
and employee onboarding
workflows.
Developers
IRS Compliance Integrations
Developers building tax or compliance features
use a REST API with JSON responses for
straightforward integration.
Businesses
Issuers of 1099 & W-2 Forms
Any business issuing information returns to
contractors or employees can verify TINs before
filing season begins.
ACA Filers
Employers Filing ACA Forms
Organizations filing ACA information returns use TIN Matching to confirm covered individuals' taxpayer information.
How ExpressTINCheck Works
IRS TIN Matching works by submitting a Name and TIN combination to the IRS for comparison against its records. Standard TIN Matching results are typically returned within 24 hours and indicate whether the combination matches, does not match, or could not be matched due to missing data.
1
Submit the Name and TIN
A business submits one or more recipients' name, TIN type (SSN, EIN, or ITIN), and TIN through the API, either individually or as a batch.
2
We Send the Request to the IRS
Each submitted name and TIN combination is forwarded to the IRS for verification against its records.
3
The IRS Returns a Result
Standard TIN Matching results are typically available within 24 hours. The result is delivered automatically through a webhook once the IRS has processed the request.
4
The Business Takes Action
If a mismatch is returned, the business follows up with the payee to correct the information before filing the return with the IRS.
Key Benefits of a TIN Check API
Verifying taxpayer information through an API, rather than a manual
lookup tool, gives a business the ability to build TIN Matching directly
into its existing systems and workflows.
Standard TIN Matching
Submit Name and TIN combinations in bulk and receive results from
the IRS within 24 hours, delivered automatically by webhook.
Instant TIN Matching
For businesses where immediate verification is critical, such as
onboarding contractors or vendors, a real-time matching option is
available on request and reduces exposure to backup-withholding
triggers and IRS notices.
Direct Software Integration
A REST API with JSON requests and responses fits into existing
payroll, accounting, or ERP software without manual data entry.
Sandbox Simulation
A sandbox environment lets developers simulate the full TIN Matching
flow before submitting live requests.
response.json
// Sample request submission response
{
"SubmissionId": "54d2226b-c8ae...",
"TINMatchingRecords": {
"SuccessRecords": [
{
"Name": "Acme Consulting LLC",
"TINType": "EIN",
"TIN": "12-1231234",
"Status": "ORDER_CREATED",
"NumOfAttemptsRmng": 2
}
]
}
}
// Final match result is sent via webhook
TIN Matching Improves Filing Accuracy Across Form Types
TIN Matching is not limited to a single IRS form. It supports accuracy across the
information returns most commonly affected by name and TIN mismatches.
Form
Used For
Why TIN Matching Helps
Form W-9
Collecting payee TIN before payment
Confirms accuracy at intake, before any reporting occurs
Form 1099
Reporting non-employee income
Reduces mismatches across NEC, MISC, and other 1099 variants
Form W-2
Reporting employee wages
Verifies employee name and SSN before annual filing
ACA Forms
Reporting health coverage information
Confirms covered individuals' taxpayer information before filing
Why Choose ExpressTINCheck
IRS-Authorized
Built specifically for IRS TIN Matching and information return compliance.
Built for Speed
Real-time matching designed to fit into existing software workflows.
Secure by Design
Authenticated API requests help keep taxpayer data protected throughout the
process.
Developer-Friendly
Clear documentation and sandbox testing support a straightforward integration
process.
Frequently Asked Questions
Why is an IRS TIN Check important?
+
An IRS TIN Check helps ensure that taxpayer information is accurate before filing information returns such as Forms 1099. Verifying TINs in advance minimizes IRS notices, backup withholding issues, and costly corrections while improving filing accuracy.
How do I check a TIN with the IRS?
+
A TIN Matching API securely sends the taxpayer's TIN to the IRS TIN Matching program. The IRS validates whether the information matches its records and returns the verification result, allowing businesses to identify mismatches before filing tax forms.
Can I verify multiple TINs at once?
+
Yes. Most TIN Matching APIs support bulk verification, allowing businesses to validate hundreds or thousands of taxpayer records in a single process. This is especially useful during year-end filing season.
Is an online TIN Check secure?
+
Yes. A reliable TIN Matching API uses encrypted communication, secure authentication, and industry-standard security practices to protect sensitive taxpayer information during transmission and processing.
Why should I verify a TIN before filing?
+
Yes. A TIN Matching API is designed for easy integration with payroll, accounting, ERP, HR, fintech, and tax software, allowing developers to automate taxpayer verification within their existing workflows.
Who should use a TIN Matching API?
+
Software companies, payroll providers, accounting firms, ERP and HRIS platforms, and any business that files W-2, 1099, or ACA forms can benefit from using a TIN Matching API.
How does ExpressTINCheck help verify taxpayer information?
+
ExpressTinCheck offers Standard TIN Matching for bulk verification with results delivered by webhook, and Instant TIN Matching for qualifying businesses that need real-time results, all through a REST API with JSON requests and a sandbox for testing.
Get Started Now
Review the API documentation and request body format to see how
TIN Matching fits into your existing filing or payroll workflow.
Get Started Now
Copyright © 2026 expresstincheck.com. All rights reserved.expresstincheck.com is proudly owned and managed by SPAN Enterprises LLC, 2685 Celanese Road, Suite 100, Rock Hill, SC 29732.
TIN Check: Verify Taxpayer Identification Numbers Against IRS Records
A TIN Check confirms whether a taxpayer's name and Taxpayer Identification Number match IRS records, so you can catch errors before a 1099, W-2, or ACA form is ever filed. Run a one-off IRS TIN Check online, or automate the process at scale with our TIN Check API.
Sandbox Available
IRS-Authorized Provider
REST API with JSON Responses
app.expresstincheck.com/dashboard
TIN Matching Requests
+ New
SUBMITTED
1,204
MATCHED
1,180
PENDING
24
NAME
TIN
STATUS
Acme Consulting LLC
12-1231234
MATCH
Bright Path Vendors
45-6789012
MATCH
Nolan & Ortiz LLC
98-7654321
PENDING
Summit Freight Co
23-4561789
NO MATCH
View all requests →
Match Confirmed
Encrypted Request
What Is a TIN Check ?
A TIN Check is the process of confirming that a taxpayer's name and Taxpayer Identification Number (TIN) match IRS records. It can be run one at a time through an online lookup, or automated at scale through a TIN Check API that returns a match, no-match, or unable-to-match result.
Instead of manually checking each payee's information or waiting until after a return is filed to discover an error, a business can call the API directly from its own software, payroll system, or accounting platform. The API returns a real-time result, typically within seconds, so the name and TIN can be corrected before any IRS form is submitted.
An IRS TIN Check is commonly used by software providers, payroll companies, and accounting firms that need to verify large volumes of payee information automatically, rather than checking each record one at a time through a manual portal.
Why Is an IRS TIN Check Important?
An IRS TIN Check is important because it helps businesses catch Name and TIN mismatches before filing, which reduces rejected returns, IRS B Notices, and the cost of manual corrections.
Avoid Rejected Filings
A mismatched name and TIN
can cause the IRS to reject an
information return outright,
requiring it to be corrected
and resubmitted.
Prevent B Notices
When a mismatch is
discovered after filing, the IRS
may issue a B Notice,
requiring the payer to follow
up with the payee directly.
Reduce Filing Delays
Catching mismatches early
means corrections happen
before a deadline, not after,
which keeps the overall filing
process on schedule.
Lower Compliance Risk
Verifying taxpayer information
in advance reduces the
manual review burden and the risk of penalties tied to
incorrect information returns.
Who Should Use TIN Verification?
TIN Verification is relevant to any organization that files IRS information returns on
behalf of itself or its clients, or that builds software used to do so.
Software Companies
Platforms Filing on Behalf of
Users
Any platform that generates 1099
or W-2 forms for its users benefits
from verifying TINs automatically
through an API.
Payroll Providers
Payroll & HCM Platforms
Payroll providers verify employee
and contractor TINs in bulk before
W-2 and 1099 season.
Accounting Firms
Tax Professionals &
Bookkeepers
Firms filing returns for multiple
clients use TIN Matching to
confirm payee data before each
filing cycle.
ERP & HRIS Providers
Enterprise Systems
ERP and HRIS platforms integrate
TIN Matching directly into vendor
and employee onboarding
workflows.
Developers
IRS Compliance Integrations
Developers building tax or compliance features
use a REST API with JSON responses for
straightforward integration.
Businesses
Issuers of 1099 & W-2 Forms
Any business issuing information returns to
contractors or employees can verify TINs before
filing season begins.
ACA Filers
Employers Filing ACA Forms
Organizations filing ACA information returns use
TIN Matching to confirm covered individuals'
taxpayer information.
How ExpressTINCheck Works
ExpressTINCheck works by submitting a Name and TIN combination to the IRS for comparison against its records. Standard TIN Matching results are typically returned within 24 hours and indicate whether the combination matches, does not match, or could not be matched due to missing data.
1
Submit the Name and TIN
A business submits one or more recipients' name, TIN type (SSN, EIN, or ITIN), and TIN
through the API, either individually or as a batch.
2
We Send the Request to the IRS
Each submitted name and TIN combination is forwarded to the IRS for verification against its
records.
3
The IRS Returns a Result
Standard TIN Matching results are typically available within 24 hours. The result is delivered
automatically through a webhook once the IRS has processed the request.
4
The Business Takes Action
If a mismatch is returned, the business follows up with the payee to correct the information
before filing the return with the IRS.
Key Benefits of a TIN Check API
Verifying taxpayer information through an API, rather than a manual
lookup tool, gives a business the ability to build TIN Matching directly
into its existing systems and workflows.
Standard TIN Matching
Submit Name and TIN combinations in bulk and receive results from
the IRS within 24 hours, delivered automatically by webhook.
Instant TIN Matching
For businesses where immediate verification is critical, such as
onboarding contractors or vendors, a real-time matching option is
available on request and reduces exposure to backup-withholding
triggers and IRS notices.
Direct Software Integration
A REST API with JSON requests and responses fits into existing
payroll, accounting, or ERP software without manual data entry.
Sandbox Simulation
A sandbox environment lets developers simulate the full TIN Matching
flow before submitting live requests.
response.json
// Sample request submission response
{
"SubmissionId": "54d2226b-c8ae...",
"TINMatchingRecords": {
"SuccessRecords": [
{
"Name": "Acme Consulting LLC",
"TINType": "EIN",
"TIN": "12-1231234",
"Status": "ORDER_CREATED",
"NumOfAttemptsRmng": 2
}
]
}
}
// Final match result is sent via webhook
TIN Matching Improves Filing Accuracy Across Form Types
TIN Matching is not limited to a single IRS form. It supports accuracy across the
information returns most commonly affected by name and TIN mismatches.
Form
Used For
Why TIN Matching Helps
Form W-9
Collecting payee TIN before payment
Confirms accuracy at intake, before any reporting occurs
Form 1099
Reporting non-employee income
Reduces mismatches across NEC, MISC, and other 1099 variants
Form W-2
Reporting employee wages
Verifies employee name and SSN before annual filing
ACA Forms
Reporting health coverage information
Confirms covered individuals' taxpayer information before filing
Why Choose ExpressTINCheck
IRS-Authorized
Built specifically for IRS TIN
Matching and information
return compliance.
Built for Speed
Real-time matching designed
to fit into existing software
workflows.
Secure by Design
Authenticated API requests
help keep taxpayer data
protected throughout the
process.
Developer-Friendly
Clear documentation and
sandbox testing support a
straightforward integration
process.
Frequently Asked Questions
Why is an IRS TIN Check important?
+
An IRS TIN Check helps ensure that taxpayer information is accurate before filing information returns such as Forms 1099. Verifying TINs in advance minimizes IRS notices, backup withholding issues, and costly corrections while improving filing accuracy.
How do I check a TIN with the IRS?
+
A TIN Matching API securely sends the taxpayer's TIN to the IRS TIN Matching program. The IRS validates whether the information matches its records and returns the verification result, allowing businesses to identify mismatches before filing tax forms.
Can I verify multiple TINs at once?
+
Yes. Most TIN Matching APIs support bulk verification, allowing businesses to validate hundreds or thousands of taxpayer records in a single process. This is especially useful during year-end filing season.
Is an online TIN Check secure?
+
Yes. A reliable TIN Matching API uses encrypted communication, secure authentication, and industry-standard security practices to protect sensitive taxpayer information during transmission and processing.
Why should I verify a TIN before filing?
+
Yes. A TIN Matching API is designed for easy integration with payroll, accounting, ERP, HR, fintech, and tax software, allowing developers to automate taxpayer verification within their existing workflows.
Who should use a TIN Matching API?
+
Software companies, payroll providers, accounting firms, ERP and HRIS platforms, and any business that files W-2, 1099, or ACA forms can benefit from using a TIN Matching API.
How does ExpressTINCheck help verify taxpayer information?
+
ExpressTinCheck offers Standard TIN Matching for bulk verification with results delivered by webhook, and Instant TIN Matching for qualifying businesses that need real-time results, all through a REST API with JSON requests and a sandbox for testing.
Get Started Now
Review the API documentation and request body format to see how
TIN Matching fits into your existing filing or payroll workflow.
Get Started Now
Copyright © 2026 expresstincheck.com. All rights reserved.expresstincheck.com is proudly owned and managed by SPAN Enterprises LLC, 2685 Celanese Road, Suite 100, Rock Hill, SC 29732.
