Every spring I get at least two calls from clients who paid a daycare provider in cash all year and cannot claim their dependent care credit because they have no documentation of the provider’s TIN. Form W-10 exists precisely to solve this problem – but it only works if it was requested and retained before tax season, not in February when the client realizes what they need.
Key Takeaways
- Form W-10 – “Dependent Care Provider’s Identification and Certification” – is completed and signed by a dependent care provider to certify their name, address, and TIN to the taxpayer who paid for dependent care services.
- Taxpayers use the provider’s information from Form W-10 (or equivalent documentation) to complete Form 2441 (Child and Dependent Care Expenses) and claim the Dependent Care Credit or exclude Dependent Care FSA benefits.
- W-10 is not filed with the IRS – it is a private document given by the provider to the taxpayer. The taxpayer retains it as documentation for their own tax return.
- Taxpayers must make a good-faith effort to obtain the provider’s TIN; if the provider refuses, the taxpayer must still complete Form 2441 with the information available and attach documentation of the refusal.
- The most common pitfall is failing to collect W-10 (or equivalent) at the start of the service relationship, then scrambling to obtain it at tax time – and discovering the provider no longer cooperates.
- Quick rule you can copy into your SOP: advise clients to obtain W-10 from every dependent care provider at the first payment, file it with their tax records, and never pay more than nominal amounts without documentation of the provider’s TIN.
What Form W-10 Is and When to Use It
Form W-10 is a one-page identification certification completed by dependent care providers – daycare centers, after-school programs, summer camps, babysitters, nannies, au pairs, and elder care providers. The provider completes and signs the form, certifying their name, address, and Taxpayer Identification Number (TIN), and gives it to the taxpayer who paid for their services.
The taxpayer then uses the TIN provided on W-10 (or another acceptable source document such as a daycare’s W-9 or a letter on business letterhead) to fill out Form 2441 on their individual tax return. Without a valid provider TIN, the IRS will disallow the Dependent Care Credit and deny the exclusion of employer-provided Dependent Care FSA benefits.
From my side of the desk, Form W-10 is the least-known but most practically impactful form in the individual tax return prep process. Clients routinely pay thousands of dollars in childcare without keeping any record of the provider’s TIN. Building a W-10 request step into their recordkeeping habits is worth more in tax savings than almost any planning strategy I could offer them.
Who Uses Form W-10
The provider completes and signs Form W-10. The taxpayer requests it. Any individual or organization that provides dependent care services for which a taxpayer claims the Dependent Care Credit or excludes FSA benefits should be willing to provide this information. If the provider is a business, the TIN is the business EIN. If the provider is an individual (nanny, babysitter), the TIN is their Social Security Number or Individual Taxpayer Identification Number (ITIN).
Form W-10 vs. Form W-9
For business daycare providers (LLC, corporation, licensed center), a Form W-9 is equally acceptable as documentation of the provider’s TIN. Many established daycare centers already have Form W-9 available for parents. Form W-10 is more common when dealing with individual providers who may not be familiar with W-9. Either form accomplishes the same purpose: documenting the provider’s TIN for the taxpayer’s records.
When Is W-10 Relevant
W-10 is relevant whenever a taxpayer paid for qualifying dependent care: children under age 13, or a disabled spouse or other dependent who cannot care for themselves. The care must have been provided to allow the taxpayer (and spouse, if married) to work or look for work. The annual limit for qualifying expenses is $3,000 for one dependent and $6,000 for two or more, though these thresholds interact with the FSA exclusion limit.
How to Complete Form W-10
Form W-10 is straightforward – it is a single page with four boxes and a signature section. The provider completes all of it. The taxpayer should verify the information before filing their return.
| Field | Who Completes | What to Enter |
|---|---|---|
| Box 1 – Care Provider’s name | Provider | Legal name of individual or business name of the care provider |
| Box 2 – Address | Provider | Complete address including street, city, state, and ZIP |
| Box 3 – TIN | Provider | SSN for individual providers, EIN for business providers |
| Box 4 – Business | Provider | Check if the provider is a business (not an individual) |
| Signature and date | Provider | Provider signs and dates under penalty of perjury |
What “Under Penalty of Perjury” Means Here
The provider’s signature certifies the information is correct. If a provider provides a false TIN and the taxpayer relies on it in good faith, the taxpayer is generally protected – but they must be able to document they made a good-faith request. Keep the signed W-10 in the tax file for the year the expenses were paid. The IRS may request it during an examination of the dependent care credit claim.
Acceptable Substitutes for W-10
The IRS accepts other documentation in place of W-10, as long as the document was provided by the care provider and shows their name, address, and TIN. Acceptable alternatives include: a completed Form W-9, a letter on the provider’s business letterhead, a statement from the provider’s state licensing agency, or a copy of the provider’s state business registration showing their EIN. The key is that the provider supplied the TIN – the taxpayer cannot simply look it up on their own.
What to Do If the Provider Will Not Give Their TIN
If a provider refuses to provide their TIN or complete Form W-10, the taxpayer must still report the expenses on Form 2441 with as much information as available (name and address) and write “See attached” in the TIN space. The IRS instructs taxpayers to attach a statement explaining their efforts to obtain the TIN. The credit may still be claimed in good-faith situations where the provider refuses, but the taxpayer’s documentation of the refusal is critical.
Deadlines, Penalties, and Consequences
Form W-10 has no filing deadline with the IRS because it is not filed with the IRS. It is an internal documentation form. However, the consequences of not having a completed W-10 (or equivalent) are tax-specific.
| Situation | Consequence | Resolution |
|---|---|---|
| No provider TIN available on Form 2441 | IRS may disallow the Dependent Care Credit | Document good-faith efforts to obtain TIN; request W-10 or W-9 retroactively |
| Provider provides incorrect TIN | IRS may send notice; backup withholding may apply | Good-faith reliance doctrine protects taxpayer; document that provider signed W-10 |
| Provider refuses to provide TIN | Taxpayer must note refusal on Form 2441; credit may still be claimed | Attach written documentation of refusal attempts to tax return |
Retention Requirements
Retain the completed Form W-10 for at least three years from the date the related tax return was filed (the standard statute of limitations for individual returns). If a credit was claimed, retain it as long as the return could potentially be examined. I typically advise clients to keep dependent care documentation for five years to be safe.
Form W-10 and the Dependent Care Tax Credit
The Dependent Care Credit under IRC §21 allows eligible taxpayers to claim a non-refundable credit on Form 2441 for qualifying dependent care expenses. Understanding how W-10 fits into this credit claim helps practitioners guide clients toward proper documentation practices before tax season.
Who Qualifies for the Credit
The credit is available to taxpayers who paid for qualifying care for: (1) a child under age 13 whom the taxpayer can claim as a dependent; (2) a spouse who is physically or mentally incapable of self-care; or (3) any other person incapable of self-care whom the taxpayer can claim as a dependent. The taxpayer (and spouse, if married filing jointly) must have earned income – the credit is tied to the ability to work.
Credit Amount and Phase-Out
The credit percentage ranges from 20% to 35% of qualifying expenses, depending on AGI. The expense limit is $3,000 for one qualifying person and $6,000 for two or more. However, any employer-provided Dependent Care FSA benefits (excluded from income under IRC §129) reduce the qualifying expense limit dollar-for-dollar. If an employee excluded $5,000 in FSA benefits, only $1,000 more qualifies for the credit under the $6,000 limit (for two dependents).
How Provider TIN Documentation Supports Form 2441
Line 1 of Form 2441 requires the care provider’s name, address, and TIN for each provider. The IRS cross-references these TINs to verify that the provider reported the income on their own tax return. A missing or incorrect TIN triggers an IRS notice and potential disallowance of the credit. Form W-10 is the documentation that supports what the taxpayer enters on Form 2441 Line 1.
When Providers Refuse to Provide Form W-10
One of the most common practical difficulties with Form W-10 is providers who refuse to provide their TIN – typically individual babysitters or nannies who do not want their income on the tax radar. Here is how to handle it.
The Taxpayer’s Legal Position
The IRS acknowledges that providers may refuse to provide their TIN. Under these circumstances, the taxpayer is still required to report the provider’s name and address on Form 2441 and must note that the TIN was requested and refused. The good-faith standard protects taxpayers who genuinely tried to obtain the TIN – the credit is not automatically denied because the provider refused.
Documenting the Refusal
When a provider refuses to complete Form W-10 or provide any TIN documentation, create a dated written record of the request and the refusal. Include: date of the request, how the request was made (in person, via email, etc.), the provider’s response, and the provider’s name and address. Attach this documentation to the client’s tax return or retain it in the file as backup for the Form 2441 credit claim.
What Happens If the Credit Is Disallowed
If the IRS disallows the dependent care credit because of a missing or incorrect TIN, the taxpayer can respond to the IRS notice with documentation of good-faith efforts to obtain the TIN. This is why having the written refusal record is so important. Without it, the disallowance stands and the credit is lost.
Practical Advice for Clients
Advise clients to request W-10 or equivalent documentation at the start of the service relationship, not at the end of the year. For individual providers who balk at providing an SSN, explain that the information goes only to the taxpayer for their records – it is not separately reported to the IRS as a 1099. Many individual providers who resist the initial request will cooperate when the process is explained clearly.
Common Mistakes That Slow Things Down
- Waiting until tax season to request W-10 – Individual providers may have moved, changed phone numbers, or become unresponsive by January. Request W-10 at the start of the service relationship and every year you continue using the provider.
- Accepting a verbal or handwritten TIN without a signed form – A signed Form W-10 creates a record under penalty of perjury. An unsigned handwritten note does not. Always get the provider’s signature on W-10 or W-9.
- Confusing W-10 with W-9 – Both request TIN certification, but W-10 is specific to dependent care providers and is given to the taxpayer (not the IRS). Either form works as documentation, but be consistent in which form you request from each provider type.
- Not retaining W-10 for the required period – Keep signed W-10 forms for at least three to five years from the related tax return filing date. Dependent care credits are an IRS audit area for individual returns.
- Failing to document a provider’s refusal to provide TIN – If a provider refuses, document it in writing immediately. Without documentation, the IRS disallowance of the credit is difficult to contest.
- Assuming the employer’s FSA records eliminate the need for W-10 – FSA reimbursement documentation shows what the employer paid, but Form 2441 still requires the provider’s TIN. The employer’s FSA records do not substitute for a provider TIN on the individual return.
Practical Checklists You Can Reuse
Copy these into your internal wiki or SOP.
Client Dependent Care Documentation Checklist
- Request Form W-10 (or Form W-9) from every dependent care provider at the start of the service relationship
- Verify the provider’s TIN is complete and the form is signed
- Retain the completed W-10 in the client’s tax records for the applicable year
- If provider refuses to provide TIN, document the request and refusal in writing with the date
- At year-end, confirm you have W-10 documentation for every provider the client paid
- Calculate total qualifying dependent care expenses paid during the year
- Confirm Dependent Care FSA benefit amounts from employer records (Form W-2 Box 10)
Form 2441 Preparation Checklist
- Enter each provider’s name, address, and TIN on Form 2441 Part I from the W-10 or W-9 on file
- Enter total qualifying expenses paid to each provider
- Enter FSA benefits from W-2 Box 10 on the appropriate line
- Calculate qualifying expenses net of FSA benefits
- Apply the correct credit percentage based on AGI
- Confirm both taxpayer and spouse (if applicable) had earned income for the credit to apply
Practice Management: Dependent Care Documentation SOP
- Add a dependent care documentation question to the tax organizer sent to all individual clients
- Ask clients in January to confirm they have provider TIN documentation for all 2024 providers
- If documentation is missing, request it immediately – do not wait for the provider to be unavailable
- Flag missing TIN situations in the return preparation for partner review before filing
For Accounting Firms – Keep Delivery Smooth While You Scale
Individual tax return preparation involves dozens of documentation collection steps like W-10 – small in isolation, but collectively a significant source of client follow-up, return delays, and audit exposure if not systematically managed. Firms that build structured offshore support for tax organizer processing, documentation review, and client communication tend to catch these gaps earlier in the prep cycle, before they create filing delays at the final review stage.
Accountably supports CPA and EA firms with individual tax return delivery through trained offshore teams embedded in your workflow, from initial organizer processing through final return preparation. We keep this mention brief on purpose, your process comes first.
FAQs About Form W-10
What is Form W-10 used for?
Form W-10 is used by dependent care providers to certify their name, address, and TIN to taxpayers who paid for their services. Taxpayers use this information to complete Form 2441 and claim the Child and Dependent Care Credit or exclude employer-provided Dependent Care FSA benefits from their income. Form W-10 is not filed with the IRS – it is retained by the taxpayer as supporting documentation.
Who completes Form W-10?
The dependent care provider completes and signs Form W-10. The taxpayer requests it. Providers include daycare centers, after-school programs, summer camps, individual babysitters, nannies, and other qualifying dependent care service providers. For business providers, the TIN is an EIN. For individuals, it is an SSN or ITIN.
What if my dependent care provider refuses to give me Form W-10?
If a provider refuses to provide their TIN, the IRS requires the taxpayer to still report the provider on Form 2441 with whatever information is available (name and address), note the TIN was requested and refused, and attach documentation of the refusal attempt to the return. The credit is not automatically denied if a good-faith request was made and refused – but you must document the attempt.
Can I use a Form W-9 instead of Form W-10?
Yes. For business dependent care providers, a completed and signed Form W-9 is an acceptable substitute for Form W-10. Many licensed daycare centers already have W-9s available for parents. Either form documents the provider’s TIN in a format the IRS accepts as substantiation for the dependent care credit claim on Form 2441.
How long do I need to keep Form W-10?
Retain Form W-10 for at least three years from the date you filed the tax return on which you claimed the dependent care credit. If the credit was substantial or there is any question about the provider’s legitimacy, keeping it for five years is prudent. Dependent care credits are an IRS audit focus area for individual returns.
This article is educational, not tax advice. Rules change, and states differ. Confirm thresholds, deadlines, and elections against the current IRS instructions for your year and facts.