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TIN Matching

Real-Time TIN Matching

Validate Taxpayer Identification Numbers against IRS records in real time. Catch mismatches before they reach a filing, prevent costly B-Notices, and onboard vendors with confidence that their data is accurate from day one.

Real-time IRS TIN validation
Prevent costly B-Notices
Match before you file with the IRS
Get Started from $25 Book Demo
★★★★★ 4.9 · Trusted by 10k+ teams

Trusted by leading brands

Why EINsearch

Why teams trust our TIN Matching

EINsearch validates tax information directly against the IRS before you file, dramatically reducing the risk of rejected forms, IRS B and P-notices, and fraudulent vendor data. Compliance teams can verify suppliers, contractors, and clients in real time without breaking their existing workflow.

  • Real-time IRS validation
  • API access for automation
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Video frame mockup with "Watch: TIN Matching in under 60 seconds" label
Developer Ready

Real-time TIN Matching API

Embed real-time IRS TIN verification directly into your onboarding forms, AP automation, and tax processing systems. The EINsearch API delivers instant validation, replacing manual checks at scale and keeping accurate compliance data flowing into the systems your team already uses.

Automated vendor verification
Real-time IRS verification endpoint
Batch TIN validation support
Connect to your existing compliance systems
Compare EIN Lookup Plans
API response code mockup
{
  "company_name": "Apple Inc.",
  "ein": "**-*******",
  "entity_type": "Corporation",
  "state": "California",
  "irs_verified": true,
  "match_score": 0.99,
  "last_verified": "2026-07-24"
}
200 OK — Verified match
Accuracy You Can Trust

Avoid penalties and fraud with TIN Matching

Incorrect Taxpayer Identification Numbers can lead to filing errors, IRS notices, compliance exposure, and unnecessary operational risk. EINsearch validates TINs against IRS records in real time, helping teams identify mismatches early, resolve issues before submission, and improve filing accuracy across onboarding and reporting workflows.

Flag mismatched TINs before filing deadlines
Clear yes/no match results
Real-time IRS validation on submitted records
Compare TIN Matching Plans
Apple Inc.
EIN **-*******
Verified
Acme Supplies LLC
EIN **-*******
Review
Global Trade Co.
EIN **-*******
Mismatch
Walmart inc.
EIN **-*******
Verified
Get Started

Start validating TINs with confidence

No setup fees, just real-time TIN validation against IRS records. Your team helps avoid filing errors and B-Notices, with a faster path through every onboarding and reporting.

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Business Benefits

How TIN Matching strengthens compliance and reporting workflows

Reduce Costly Filing Penalties

Inaccurate TIN data leads to IRS penalties, rejected filings, and expensive year-end corrections. EINsearch validates every TIN and business name combination against IRS records in real time, so your team can catch and resolve mismatches before submission.

Reduce Fraud and Identity Risk

Real-time IRS validation confirms that the taxpayer information you've been given matches official records. Suspicious or inaccurate vendor data gets flagged before any payment is issued, reducing the risk of fraudulent or misrepresented entities entering your systems.

Clear Results, Faster Decisions

Every result is returned in plain, structured output. Your team sees immediately whether the name and TIN combination matches IRS records, so compliance decisions can move forward without delay.

Live IRS Connection

Every EIN in our database has been validated, so your search returns results you can trust. You get instant confirmation the data matches what the IRS has on file, reducing the risk of rejected filings or mismatch errors.

Continuously Maintained

Our database is continuously enhanced to keep data accurate and current. Records are added and refined on an ongoing basis, so every compliance decision your team makes is grounded in the most current data available.

20M+ Verified Records

Over 20 million verified EINs make EINsearch one of the largest commercial compliance databases available. Finance, tax, and compliance teams across the country rely on it for accurate data on US businesses of every size and sector.

Customer Feedback

Also Explore

Extend your compliance toolkit

TIN Matching is strongest as part of a complete compliance program. Pair it with the rest of the EINsearch platform to cover onboarding, vendor management, and ongoing regulatory checks.

EIN Lookup
Search 20+ million verified EINs by company name or EIN, then narrow by city, state, or ZIP. Confirm business identity instantly and reduce risk during vendor onboarding and compliance reviews.
Learn more
Batch TIN Matching
Verify thousands of TINs in one upload. Built for AP teams handling high vendor volumes, year-end 1099 prep, or annual compliance reviews.
Learn more
OFAC Watchlist
Screen vendors and businesses against OFAC and global sanctions lists. Identify high-risk entities at onboarding and stay compliant with ongoing monitoring requirements.
Learn more
FAQs

Frequently asked questions

Have a question not answered here? Our team is available by phone, email, or live chat.

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EINsearch provides real-time TIN Matching that validates tax ID and business name combinations directly against IRS records, delivering clear match results in a clean, structured format your team can use immediately. As part of our robust suite of compliance and verification tools, every subscription also includes OFAC sanctions screening, allowing businesses to streamline vendor onboarding, reduce compliance risk, and manage verification workflows through a single provider. Manual search functionality is included with every plan, while annual subscriptions include API access to support automated onboarding and ongoing compliance operations.

A Tax Identification Number, or TIN, is issued by the IRS and comes in several different forms. One of the most common is the Social Security Number (SSN) issued by the Social Security Administration (SSA). An SSN is the only TIN that is not issued by the IRS. In contrast, an Employer Identification Number, or EIN, is distributed by the IRS and typically assigned to an entity such as a business, trust, or estate. An Individual Tax Identification Number (ITIN) is a tax processing number assigned to individuals that do not qualify for an SSN but may still have a U.S. tax obligation and therefore need a TIN.

If the IRS discovers incorrect information, they will typically send a notification to the filer. It then becomes the responsibility of the filer to take action to correct the mistake or be subject to penalties and fines.

A CP2100 Notice is how the IRS informs a filer that submitted tax information contains incorrect TIN or name data. The notice identifies the records believed to be incorrect and gives the filer an opportunity to correct the information before additional compliance issues or penalties occur.

If you have provided incorrect information on a 1099, a B-Notice can be submitted to the individual or entity that provided you incorrect information. In this notice, the person submitting incorrect information is informed of their need to provide corrected information or otherwise be subjected to a mandatory withholding on the payment they are to receive.

 

These notices can create additional administrative work, increase compliance risk, and expose businesses to potential IRS penalties for incorrect information reporting. EINsearch helps reduce the likelihood of B-Notices by validating vendor name and TIN combinations in real time during onboarding, allowing mismatches to be identified and corrected before 1099s are filed.