Editorial policy
Tax content is worth nothing if it is not accurate and current. These are the practices we hold ourselves to, so you can judge how much weight to give what you read here.
Sources we treat as authoritative
| Tier | Source | How we use it |
|---|---|---|
| 1 | The form and its instructions, and IRS publications such as Publication 1281 and Publication 515 | The primary basis for every factual claim about what the form asks and how it works |
| 2 | The Internal Revenue Code and Treasury Regulations | For penalties, backup withholding mechanics, and substitute form requirements |
| 3 | Enacted legislation and its statutory text | For changes such as the $2,000 reporting threshold |
| 4 | IRS guidance pages, notices and revenue procedures | For rates, indexed amounts, and procedural detail |
| — | Other websites and commercial tax blogs | Not used as a source. Where we found a claim elsewhere we verify it against tiers 1 to 4 before publishing, or we leave it out |
Some penalty amounts under IRC 6721 and 6722 are indexed for inflation annually. Publishing a specific figure would guarantee that this site is wrong within a year, so for those we describe the structure and point you to the current-year IRS source. Where a figure is fixed in statute we state it: the $50 penalty under 6723, the $500 penalty under 6682, the 24% withholding rate.
How each page is put together
Start from the primary source
The relevant part of the form, the instructions, or the code section. Not a competitor page.
Write for one specific question
Each page answers a question somebody actually has. Pages that exist only to repeat a keyword are not useful to anybody, and we try not to publish them.
State the rule, then the exception
Most W-9 confusion comes from a rule stated without its exception, or an exception stated as if it were the rule.
Link the source
Every substantive page ends with a primary sources block naming the documents behind it, so you can check us.
Mark the boundary
Where the answer depends on facts we cannot see, or on legal analysis beyond a reference site, we say so plainly rather than offering a guess.
Date it
Every page shows a last-updated date and the form revision it was checked against.
What we review, and when
- When the IRS revises the form. The current revision is Rev. March 2024; we are tracking the draft Rev. June 2026 and will update the day it goes final. Status
- When the law changes. The $600 to $2,000 threshold increase prompted a review of every page that mentioned a threshold.
- When rates or indexed amounts change.
- When a reader tells us we are wrong, and corrections take priority over new pages.
- Annually, as a baseline sweep even where nothing external has changed.
Corrections policy
If we get something wrong, we correct the page rather than quietly deleting it, and we update the last-updated date so you can see it changed. Where an error was material, meaning something that could have led a reader to file incorrectly, we note the correction on the page itself.
Report an error to editor@w9form.org. A link to the IRS source that contradicts us is the fastest way to get it fixed.
Independence and funding
This site has no sponsor deciding its content. We do not sell W-9 filing services, we do not gate anything behind an email address, and we host the blank IRS form for free because it is a public-domain document. Where we mention a category of commercial service, such as e-signature platforms or vendor management systems, we do so because the subject requires it and never as a placement.
Primary sources cited on every page. Dates on everything. A named boundary where the answer needs a professional. And a correction when we are wrong.