Invoice CSV Formatter
Fix an invoice CSV: delimiters, quoting, encoding, dates and amounts.
Invoice EIN Validator
Check US Employer Identification Numbers on invoices and W-9s, in bulk.
Quick Tool Overview
The Invoice EIN Validator checks US Employer Identification Numbers in bulk — nine digits, the 12-3456789 format and a prefix the IRS has actually issued — and flags numbers shaped like a Social Security number.
- What it does
- Validates EINs from invoices and W-9s
- You give it
- EINs, one per line
- You get back
- Format and prefix verdicts
- Best for
- Vendor onboarding and 1099 season
About the Invoice EIN Validator
An EIN is the number a US business gives you for tax reporting, and the one you will put on a 1099 at the end of the year. Unlike a VAT number it has no check digit, so there is less to verify — but there is more than nothing: it is nine digits, written 12-3456789, and the first two are a prefix the IRS has actually issued.
Paste one EIN or a column of them from your vendor list. Each is checked for length, for a prefix on the IRS list — which rules out numbers that were never valid — and formatted the way the IRS writes them. Numbers that look like Social Security numbers are flagged, because a sole proprietor often supplies one by mistake.
What no offline tool can do is confirm the EIN belongs to the name beside it. That needs the IRS TIN Matching service, and for contractors you should collect a signed W-9 regardless. Everything here runs in your browser.
Key features of the Invoice EIN Validator
Prefix list
Every prefix the IRS has issued.
Formatting
Written back as 12-3456789.
SSN warning
Flags numbers that look like an SSN.
Bulk with CSV
A vendor list in one pass.
Honest
An EIN has no check digit, and the tool says so.
How to use the Invoice EIN Validator
-
1
Paste the EINs
One per line, with or without the dash.
-
2
Check the failures
A bad length or an unissued prefix means it is wrong.
-
3
Note the warnings
Numbers shaped like an SSN are flagged.
-
4
Match names at the IRS
TIN Matching confirms the number belongs to the business.
Frequently asked questions
No. Only the length, the format and the prefix can be checked offline, which still catches most typos.
They are the prefix, originally the IRS campus that issued the number. Only certain prefixes have ever been used, so an unknown one is definitely wrong.
Both are nine digits. An EIN is written 12-3456789 and an SSN 123-45-6789. A sole proprietor may legitimately give an SSN, but you should collect it on a W-9, not from an invoice.
No. Everything runs in your browser.
Reviews of the Invoice EIN Validator
What people who use the Invoice EIN Validator think of it. Reviews come from visitors and are posted as written.
No ratings yet
Yours would be the first.
- 5 0 reviews rated 5 stars
- 4 0 reviews rated 4 stars
- 3 0 reviews rated 3 stars
- 2 0 reviews rated 2 stars
- 1 0 reviews rated 1 star
0 reviews
Newest first
No reviews yet
Be the first to rate the Invoice EIN Validator. It takes half a minute and no account.
Write the first reviewMore invoice tools
Invoice VAT Calculator
Add or remove VAT at any European rate, with the reverse charge explained.
Subscription Invoice Generator
A subscription invoice with the plan, seats, billing period and proration.
Hotel Invoice Generator
A hotel folio with nights, room rate, city tax and extras itemised.
Invoice GST Calculator
Work out GST at any rate, and split it into CGST, SGST or IGST for India.
Invoice Image to Text
Turn a photo of an invoice or receipt into copyable text, privately, in seconds.
Late Payment Reminder Generator
A firm reminder with the interest and recovery costs you are entitled to claim.
Invoice Notes Generator
The short note at the bottom of an invoice, for eleven situations that come up.