W-9 for Independent Contractors: When and How to Collect It

What is Form W-9 for independent contractors?

Form W-9, Request for Taxpayer Identification Number and Certification, is how a business collects the tax details it needs from a contractor it pays outside of payroll. The form gives the business four things:

Identity: the contractor’s legal name and business name, if different
Tax classification: whether the contractor is an individual, sole proprietor, partnership, LLC, or corporation
TIN: the SSN or EIN the IRS uses to match the 1099 to the contractor
Certification: the contractor’s signed statement that the TIN is correct, that they are a U.S. person, and whether they are subject to
backup withholding

When should a business request a W-9 from a contractor?

The best time is before the first payment. There is no minimum amount for requesting a W-9, and collecting it early avoids a year-end chase for contractors who have moved or stopped responding.

Situation	When to request a W-9
New contractor	During onboarding, before the first payment
Contractor’s details change	When the contractor changes their name, business structure, address, or TIN
IRS B notice received	With the first B notice, when the IRS reports that the contractor’s name and TIN do not match
Existing contractor without a W-9 on file	As soon as the gap is found, and before any further payments
Contractor’s classification is unclear	Before deciding whether a 1099 is required

Businesses should request a W-9 even from contractors who appear to be corporations. The tax classification on the form, not the business name, decides whether the contractor is exempt from 1099 reporting.

How does an independent contractor fill out Form W-9?

Most contractors complete lines 1 through 6 and Part I. The entries depend on how the contractor is taxed, so the table below starts with each line and then shows common contractor types.

Line	What the contractor enters
Line 1: Name	The name shown on the contractor’s income tax return. For a sole proprietor or single-member LLC owned by an individual, this is the owner’s individual name
Line 2: Business name	A business, trade, DBA, or disregarded entity name, if different from line 1
Line 3a: Federal tax classification	One box: Individual/sole proprietor, C corporation, S corporation, partnership, trust/estate, or LLC with its tax classification (C, S, or P). A single-member LLC that is disregarded checks the box for its owner’s classification
Line 3b: Foreign partners	Checked only by partnerships, trusts, or LLCs taxed as partnerships that have foreign partners, owners, or beneficiaries and are giving the form to a flow-through entity they own an interest in. Most contractors leave it blank
Line 4: Exemptions	An exempt payee code, if any, such as for corporations. Individual and sole proprietor contractors generally leave this blank
Lines 5 and 6: Address	The mailing address where the contractor will receive their 1099
Line 7: Account numbers	Optional
Part I: TIN	An SSN or an EIN. Sole proprietors may use either. The TIN must match the name on line 1
Part II: Certification	The contractor’s signature and date

Guidelines for specific contractor types

Contractor type	Line 1	Line 3a	TIN
Freelancer or sole proprietor	Own name (DBA on line 2)	Individual/sole proprietor	SSN, or EIN if the contractor has one. The IRS encourages SSN
Single-member LLC, disregarded	Owner’s name (LLC name on line 2)	Owner’s classification	Owner’s SSN, or owner’s EIN if the owner has one
LLC taxed as an S corporation	LLC name	LLC, code S	LLC’s EIN
Multi-member LLC or partnership	Entity name	LLC, code P, or Partnership	Entity’s EIN
Corporation	Corporation name	C corporation or S corporation	Corporation’s EIN

How to collect and manage W-9s from independent contractors?

The W-9 comes first. The payer collects and verifies it before payments begin, tracks payments during the year, and uses the W-9 data to file and furnish the 1099 after year-end.

Request: Send the W-9 at onboarding, before the first payment.
Review: Confirm that line 1, line 3a, the address, and the TIN are complete.
Verify: Match the name and TIN against IRS records before filing. IRS TIN Matching helps payers avoid B notices and penalty notices.
Store: Keep the form on file. Do not send it to the IRS. Restrict access, because TINs are sensitive.
Update: Request a new W-9 when the contractor’s name, TIN, or exempt status changes.
Report: Use the W-9 details to prepare the 1099 after year-end.

Request W-9s with TaxBandits W-9 Manager

Request W-9s or W-8s by email, text, SmartCollect link, or QR code
Run TIN Matching and USPS address validation
Store every form securely

What happens if a contractor does not provide a W-9?

The payer must apply 24% backup withholding to reportable payments when the contractor does not furnish a TIN, or when the IRS notifies the payer that the TIN is incorrect.

What the payer does

Withholds 24% and deposits it with the IRS.
Withholds immediately, even if the contractor says they have applied for a TIN. No grace period applies to nonemployee pay.
Reports the amount on Form 945 and in Box 4 of the contractor’s 1099. A 1099 is required at any amount when backup
withholding applied.
May become liable for any amount that should have been withheld but was not.

What the contractor experiences

Receives payments net of the 24%.
Provides a correct TIN to stop the withholding.
Claims the withheld amount as a credit on their tax return.
Faces a $50 penalty for failing to furnish a TIN, unless the failure is due to reasonable

Learn more about backup withholding and B notices.

W-9 vs. W-4 vs. W-8BEN: Which form does a contractor give?

The form a business collects depends on whether the worker is an employee and whether they are a U.S. person.

	Form W-9	Form W-4	Form W-8BEN
Who completes it	U.S. independent contractors and vendors	Employees	Foreign individual contractors
What it provides	Name, tax classification, TIN, and certification	Filing status and withholding adjustments	Foreign status and any treaty benefits
Tax withheld	None, unless backup withholding applies	Federal income tax from every paycheck	30%, or a lower treaty rate, on certain U.S.-source income
Year-end form	Form 1099-NEC or 1099-MISC	Form W-2	Form 1042-S, when reportable

TaxBandits Simplifies W-9 Management

TaxBandits, the leading IRS-authorized e-file provider, offers a straightforward way to complete and collect Form W-9.

Independent contractors can use the fillable W-9 to complete the form online and send it to their payers.
Businesses that need W-9s from the contractors they work with can request W-9 online through the TaxBandits W-9 Manager and manage every form securely in one place.

Frequently asked questions

Yes, when a business requests one. A U.S. contractor provides a W-9 so the business can report payments to them on Form 1099.

It is still recommended. Payments can add up during the year, and the W-9 also confirms whether the contractor is exempt from reporting.

A sole proprietor may use either. Partnerships, corporations, and LLCs that are not disregarded use their EIN.

Most independent contractors check Individual/sole proprietor on line 3a. Contractors with an LLC, partnership, or corporation check the box that matches how the business is taxed.

It can, but if the contractor has not provided a TIN, the business must generally apply 24% backup withholding to reportable payments.

A W-9 is completed by independent contractors and leads to a 1099. A W-4 is completed by employees and sets the income tax withheld from their pay.

No. Foreign individual contractors generally provide Form W-8BEN instead.

Yes. TaxBandits W-9 Manager lets businesses request, e-sign, validate, and store W-9s online.