How accurate are the W-9 guides that rank on Google?
The IRS revised Form W-9 in March 2024. It renumbered a line, added a new one and shortened a box caption. We took 40 guides straight out of live search results and checked what they say against the form as it is printed today.
The short version
- Guides sampled
- 40, all drawn from live search results
- Readable and checked
- 36
- Never mention Line 3b
- 82% of line-by-line walkthroughs (14 of 17)
- Still call it "Line 3"
- 71% (12 of 17)
- Quote the retired box caption
- 53% (9 of 17)
- State $600 with no mention of $2,000
- 43% of pages giving a threshold (12 of 28)
- Checked on
- 2026-09-01 against Form W-9 (Rev. March 2024)
Every figure on this page comes from a single run whose raw output you can download at the bottom. That file lists all 40 pages by name and URL, records which of them we could read and which we could not, and quotes the sentence behind every finding.
What the March 2024 revision actually changed
Three changes matter for anyone writing instructions.
- Line 3 became Line 3a.
- A new Line 3b was added for flow-through entities with a foreign partner, owner or beneficiary.
- The first classification box lost four words. It had read "Individual/sole proprietor or single-member LLC" and now reads simply "Individual/sole proprietor".
None of it changes what most people write on the form. All of it changes what a correct set of instructions looks like, because instructions work by telling a reader where to look and what they will see when they get there.
The five checks
Each check is a yes-or-no question that can be settled by looking at the form, so nothing here rests on our opinion of a page. We test what a page says, not whether its advice is otherwise sound. A guide can quote the old caption and still tell you the right box to tick.
| Check | Why it matters |
|---|---|
| Never mentions Line 3b among pages that walk through the form line by line | Line 3b was added in March 2024. A flow-through entity with a direct or indirect foreign partner, owner or beneficiary must tick it when the requester is itself a flow-through. A line-by-line guide that omits it is describing a superseded form. |
| Calls it "Line 3" rather than "Line 3a" among pages that walk through the form line by line | The March 2024 revision split Line 3 into Line 3a and Line 3b. Line numbering is how a reader finds the field on the paper form. |
| Quotes the retired Line 3a box label among pages that walk through the form line by line | The Rev. March 2024 form labels the first box "Individual/sole proprietor". The words "or single-member LLC" appeared in the October 2018 revision and were removed. A page quoting them is quoting a form the IRS no longer publishes. |
| States $600 without mentioning $2,000 among pages that state a dollar reporting threshold | The 1099-NEC and 1099-MISC filing threshold rose to $2,000 for payments made after December 31, 2025 under P.L. 119-21 sec. 70433, and is indexed from 2027. |
| Routes contractor pay to Form 1099-MISC among pages that mention a Form 1099 | Nonemployee compensation moved off Form 1099-MISC box 7 onto Form 1099-NEC for tax year 2020. |
Asking a 350-word answer to the question "what is a W-9?" why it never mentions Line 3b would be marking a page down for not being a different kind of page. So each check counts only against pages it can fairly apply to. Line-numbering checks count against walkthroughs that name the form’s numbered lines. The threshold check counts against pages that state a dollar figure. The 1099-MISC check counts against pages that mention a 1099 at all. The dataset records which scopes each page fell into, so you can recompute any of these against a different denominator.
Results
| Check | Flagged | Of | Share |
|---|---|---|---|
| Never mentions Line 3b | 14 | 17 | 82% |
| Calls it "Line 3" rather than "Line 3a" | 12 | 17 | 71% |
| Quotes the retired Line 3a box label | 9 | 17 | 53% |
| States $600 without mentioning $2,000 | 12 | 28 | 43% |
| Routes contractor pay to Form 1099-MISC | 0 | 34 | 0% |
Line 3b is the line nobody mentions
82% of the walkthroughs we could read never name Line 3b. That is the highest figure in the study and the easiest to interpret. A page that sets out to take you down the form field by field, and stops at a field that exists, was written against an earlier printing.
The practical cost is small for most readers and real for some. Line 3b is ticked by a partnership, trust or estate that has a foreign partner, owner or beneficiary when the requester is itself a flow-through. Someone in that position who follows a walkthrough to the letter will finish the form without having considered the line.
Line numbering drifts more slowly than you would expect
12 of 17 walkthroughs still call the classification field "Line 3". Two and a half years after the renumbering, a reader holding the paper form is being sent to a label that is not on it. One page in the sample manages both states at once: it correctly heads the section "Line 3a" and then lists the box captions from the 2018 form underneath.
The $600 threshold outlived the law
The general 1099 reporting threshold rose from $600 to $2,000 for payments made after December 31, 2025, under section 70433 of Public Law 119-21. Among pages that give a figure at all, 43% still give $600 with no mention of the new one. This is the newest change in the study, so a lag is expected. It is worth watching rather than scolding.
One error the industry has actually fixed
We also checked whether guides still route contractor payments to Form 1099-MISC, which stopped being correct when nonemployee compensation moved to Form 1099-NEC for tax year 2020. Not one page in the sample did. Of the 34 pages that mention a 1099, not one routed contractor pay to the wrong form.
We are reporting this because a study that only publishes its hits is not a study. The 1099-NEC change came with a new form number and a filing deadline that payers could not ignore, and the guides followed. A caption that quietly lost four words came with none of that, and the guides did not follow. The difference between those two outcomes is the most useful thing here.
How the sample was built
The way a sample is chosen decides what a study can claim, so here is the whole procedure.
We ran 7 searches, chosen to cover different reasons a person looks up this form, and took the guides they returned:
what is a W-9 form used for taxes freelancers explainedW-9 form small business guide accountant payroll blog 2026how to fill out W-9 form line by line instructions step by stepW-9 form LLC tax classification which box to check single memberW-9 backup withholding 24 percent exempt payee code explainedwhat is a W-9 tax form definition NerdWallet Investopedia Forbes"W-9" vendor onboarding 1099 requirements guide vendor management
Every URL in the study came out of those results. None was typed from memory or guessed at, which matters more than it sounds: a list assembled by hand tends to fill up with the sites the person assembling it already had opinions about. The dataset records which query surfaced each page.
Excluded by rule: irs.gov and Wikipedia, since they are the reference the guides are being checked against; question-and-answer threads and dictionary entries, since they are not guides; and PDFs, because the reader used here parses HTML.
Pages that refuse automated requests were opened once in an ordinary browser and read exactly as a visitor sees them. 4 pages were recovered that way. Nothing was circumvented, and no page was fetched more than a handful of times.
What we could not read
4 of the 40 pages stayed unreadable and are counted in no percentage on this page:
| Page | Reason |
|---|---|
| OnPay | Returns 403 to an automated request and to a browser alike. |
| TaxBandits | Returns an "Access Restricted!" interstitial to an automated request and to a browser alike. |
| TaxBandits LLC | Returns an "Access Restricted!" interstitial to an automated request and to a browser alike. |
| UW-Madison KB | The URL the search result pointed at now returns the KnowledgeBase "Page Not Found" page. |
Three of them refuse an automated request and a browser alike, and two of those three come from the same publisher. We have no basis for guessing what they say, so they are absent from the numbers rather than assumed to pass or fail. The fourth is a URL a search engine still lists, which now returns its site's not-found page.
What this study does not show
- It is a snapshot. Pages are edited, and a page that failed on 2026-09-01 may read differently today. The dataset is dated for that reason.
- A sample of 40 is enough to show a pattern and too small to support a claim about the whole web.
- Search results are personalised and change. A different day, or a different searcher, would return an overlapping but not identical set.
- Failing a check is not the same as giving bad advice. Several flagged pages send the reader to the right box by the wrong name.
- We did not assess anything a regular expression cannot settle: tone, completeness, or whether the wider guidance is sound.
Get the data
The raw run is published in full, under a Creative Commons Attribution 4.0 licence. Every page in the sample appears with its URL, the query that surfaced it, whether we could read it, and the exact text behind each finding.
W9Form.org, "How accurate are the W-9 guides that rank on Google?", 2026-09-01, https://w9form.org/research/w9-guide-accuracy/
If you republish a figure, please link to this page rather than to the file, so a reader can see the method and the limits alongside the number.
Frequently asked questions
What is Line 3b on Form W-9?
Line 3b was added by the Rev. March 2024 revision. A partnership, trust or estate ticks it when it has a direct or indirect foreign partner, owner or beneficiary and the requester is itself a flow-through entity. It did not exist on the October 2018 form, which is why guides written against that form have no reason to mention it.
Does omitting Line 3b make a guide wrong?
It makes the guide incomplete rather than false. Most readers are individuals who would leave Line 3b blank anyway. The reason it is worth measuring is that a walkthrough claiming to cover the form line by line, yet missing a line, is almost always a walkthrough written against the older revision and never revisited.
Why is the retired box label a problem?
Someone filling in the paper form reads the box captions to find their place. On the current form the first box reads "Individual/sole proprietor". A guide quoting "Individual/sole proprietor or single-member LLC" is describing a caption the reader will not find, and single-member LLC owners are exactly the group most likely to hesitate at that box.
Are the guides you checked badly written?
Mostly they are well written, and most were accurate on the day they were published. What these checks measure is whether a page has kept up with the form. A guide from 2019 that described the 2018 revision correctly, and has been served unchanged ever since, will fail here.
Can I reuse this data?
Yes. The dataset is published under a Creative Commons Attribution 4.0 licence, so you may quote, republish or re-analyse it with attribution. The raw file records the matched text behind every finding so you can verify each one rather than take our word for it.
How often will you repeat this?
The plan is a fresh run whenever the IRS revises the form, since that is the event these checks measure the response to. A draft dated Rev. June 2026 is already posted, so the next run follows it going final. Each run keeps its own dated dataset rather than overwriting the last.
General information, not tax advice. This page explains a federal tax form in plain English. It is not legal, tax, or accounting advice, and W9Form.org is not affiliated with the IRS. Verify everything against the official Form W-9 page on IRS.gov and speak to a licensed professional about your own situation. How we source and review these pages.