What Form 4506-C Does and Why You Need It
Form 4506-C gives your lender permission to request your tax returns directly from the IRS. This isn't the same as you handing over copies of your tax returns. The IRS sends official transcripts or copies straight to your lender, which eliminates any possibility that documents were altered.
Your lender needs this authorization for every borrower whose income or assets they're using to qualify you for the mortgage. If you're married and both spouses' incomes count toward qualification, both of you sign the form. If only one spouse's income matters for the loan, only that person needs to sign.
The form must be signed by the time you close on your loan. Most lenders collect it much earlier in the process, often at application or shortly after.
How the Process Works in Practice
Here's what happens after you sign Form 4506-C. Your lender submits it to the IRS along with the required fee. The IRS processes the request and sends tax transcripts or return copies back to your lender. This usually takes 5-10 business days, though it can take longer during busy tax seasons.
Say you applied for a mortgage in March and signed the 4506-C at application. Your lender submits it to the IRS in early April. The IRS sends back transcripts of your last two years of tax returns directly to your lender by mid-April. Your lender compares these official documents to the tax returns you provided to verify everything matches.
The form has an expiration date, typically 120 days from when you sign it. If your loan process drags on and the form expires before your lender submits it, you'll need to sign a new one.
Special Requirements for U.S. Territories
Borrowers with income from Puerto Rico, Guam, or the U.S. Virgin Islands follow different rules because these territories have their own tax systems for certain types of income.
If your income comes from Puerto Rico sources that are exempt from federal taxes, you sign Commonwealth of Puerto Rico Form 2907 instead of the federal 4506-C. This form goes to the Puerto Rico Department of the Treasury, not the IRS.
For Guam or U.S. Virgin Islands income, you still sign Form 4506-C, but your lender submits it to the Guam Department of Taxation and Revenue or the Virgin Islands Bureau of Internal Revenue instead of the federal IRS.
Documents Your Lender Must Keep
Your lender has specific record-keeping requirements around Form 4506-C. The signed form itself stays in your mortgage file permanently. When the IRS or territorial tax authority sends back your tax information, those documents also go into your permanent loan file.
This creates an official paper trail showing that your lender verified your tax information through proper channels. If your loan ever gets audited or reviewed, these documents prove your lender followed the rules.
Automated Income Assessment Exceptions
Some mortgages using automated income verification systems may have reduced 4506-C requirements. This applies to loans that use employment data verification services or account-based income verification through Fannie Mae's systems.
If your loan uses automated employment verification and receives certain eligibility ratings, your lender might not need to submit the 4506-C to the IRS. The same exception can apply to loans using automated bank account analysis for income verification, but only if the loan meets specific risk and income type criteria.
These exceptions are technical and depend on your lender's systems and your loan's risk profile. Most borrowers will still need the standard 4506-C process regardless of any automated verification tools their lender uses.
Why Fannie Mae Requires This Verification
The 4506-C requirement exists because tax return fraud was a significant problem during the housing crisis. Borrowers would alter their tax returns to show higher income, and lenders couldn't easily verify the information. Getting documents directly from the IRS eliminates this risk.
Tax returns also provide the most comprehensive picture of your income. They show not just your salary, but also business income, rental income, investment income, and other sources that might not appear on pay stubs or bank statements.
Common Problems and Delays
The biggest issue borrowers face is timing. If you file your tax returns late or request extensions, the IRS won't have current information to send your lender. This can delay your loan approval, especially if you're self-employed and your tax returns are the primary source of income verification.
Another common problem occurs when the information on your tax returns doesn't match what you told your lender initially. Maybe you estimated your business income too high, or you forgot about a significant deduction that reduced your adjusted gross income. These discrepancies can require additional documentation or even loan restructuring.
Some borrowers worry about privacy, but Form 4506-C is limited in scope. It only authorizes release of specific tax information to your lender for mortgage purposes. The IRS doesn't share your information with anyone else, and your lender can only use it for your loan application.
References
For the official guidelines, see 5302.5: IRS Form 4506-C requirements for all income and asset qualification sources in the Fannie Mae Selling Guide.
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Original Freddie Mac Guideline Text
This section contains information related to:
General requirements
Mortgages that use automated income assessment
(a)
General requirements
All Borrowers whose income is used to qualify or whose assets are used as a basis for repayment of obligations pursuant to
Section 5307.1
must sign Internal Revenue Service (IRS) Form 4506-C or an alternate form acceptable to the IRS that authorizes the release of comparable tax information to a third party (e.g., IRS Form 8821). The Form 4506-C must be signed no later than the Note Date and must be retained in the Mortgage file.
If submitting the Form 4506-C to the IRS, the IRS must receive the Form 4506-C before its expiration date. The Seller must retain in the Mortgage file the tax documentation received back from the IRS.
In addition to the requirements above, for Borrowers with income derived from sources in Puerto Rico, Guam or the U.S. Virgin Islands that are exempt from federal income taxation under the Internal Revenue Code, the following requirements apply:
In lieu of a Form 4506-C, Borrowers with income derived from sources in Puerto Rico must sign the most recent version of Commonwealth of Puerto Rico Form 2907 titled “Request For Copy of the Return, Estate or Gift Certificate of Release” (Modelo SC 2907 “Solicitud De Copia De Planilla, Relevo De Herencia Y De Donacion”) for submission to the Puerto Rico Department of the Treasury, Internal Revenue Area
Borrowers with income derived from sources in Guam or the U.S. Virgin Islands must sign the Form 4506-C (or an alternate form that authorizes the release of comparable tax information to a third party) for submission to the Guam Department of Taxation and Revenue or Virgin Islands Bureau of Internal Revenue, as applicable
(b)
Mortgages that use automated income assessment
Mortgages that use automated income assessment using employed income data may comply with the requirements in
Section 5303.4(f)
if the Last Feedback Certificate indicates Seller’s eligibility for representation and warranty relief is “Eligible” or “Partial” as described in
Section 5303.4(b)
.
Mortgages that use automated income assessment with Loan Product Advisor using account data may comply with the requirements in
Section 5303.5(e)
and/or
5305.2(e)
, as applicable, if the Mortgage:
Receives a Risk Class of Accept; and
Is underwritten using income types that are eligible for representation and warranty relief as described in
Section 5303.5(d)(ii)
and/or
5305.2(d)(ii)
, as applicable
