Fill out mortgage underwriting forms
with AI.
Mortgage underwriting forms are the standardized documents lenders use to document, analyze, and communicate loan decisions throughout the mortgage approval process. These forms capture everything from borrower financials and property valuations to risk assessments and qualifying ratios — creating a paper trail that supports compliance, investor confidence, and secondary market transactions. Among the most widely used is the Uniform Underwriting and Transmittal Summary (Fannie Mae Form 1008 / Freddie Mac Form 1077), which serves as a consolidated cover sheet summarizing the entire underwriting analysis when a lender delivers a conforming loan to the secondary market.
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About mortgage underwriting forms
These forms are primarily used by mortgage lenders, loan officers, underwriters, and compliance teams — particularly when originating conventional loans intended for sale to Fannie Mae or Freddie Mac. Whether you're packaging a loan file for secondary market delivery or ensuring your documentation meets agency guidelines, having these forms completed accurately is essential. Errors or omissions can delay closings, trigger repurchase demands, or create compliance issues down the line.
Because these forms often involve dense financial data and precise formatting requirements, tools like Instafill.ai use AI to fill them out in under 30 seconds — handling the data accurately and securely, which can be a meaningful time-saver for busy mortgage professionals processing multiple loan files.
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How to Choose the Right Form
With only one form in this category, the choice is straightforward — but it's worth understanding exactly who needs it and when.
Who Should Use This Form
The Uniform Underwriting and Transmittal Summary (Fannie Mae Form 1008 / Freddie Mac Form 1077) is specifically required for:
- Mortgage lenders and originators who are selling or delivering conforming loans to Fannie Mae or Freddie Mac on the secondary market
- Underwriters who need to document their loan analysis, qualifying ratios, and risk assessment findings in a standardized format
- Loan processors responsible for assembling a complete loan file for secondary market delivery
When You Need This Form
Use Form 1008/1077 when:
- You are closing a conforming conventional mortgage and preparing it for sale to Fannie Mae or Freddie Mac
- You need a cover sheet that consolidates borrower income, property details, loan terms, and underwriting decisions into one transmittal package
- Your institution requires a documented audit trail of underwriting analysis for investor review
When You May NOT Need This Form
This form is not required for:
- FHA, VA, or USDA government-backed loans (those programs use their own transmittal and underwriting documents)
- Portfolio loans that your institution holds and does not sell to the secondary market
- Non-conforming or jumbo loans outside Fannie Mae/Freddie Mac guidelines
Quick Tip
If you're working with a PDF version of Form 1008/1077 that isn't fillable, Instafill.ai can convert it into an interactive form and help you complete it accurately using AI — saving time and reducing data entry errors on this detail-heavy document.
Form Comparison
| Form | Purpose | Who Files It | When to Use |
|---|---|---|---|
| Uniform Underwriting and Transmittal Summary (Fannie Mae Form 1008 / Freddie Mac Form 1077) | Summarizes loan underwriting data for secondary market delivery | Mortgage lenders and originators selling conforming loans | When delivering conforming loans to Fannie Mae or Freddie Mac |
Tips for mortgage underwriting forms
The debt-to-income and housing expense ratios on Form 1008/1077 must be calculated accurately, as errors here can trigger underwriting flags or delay loan delivery. Cross-reference these figures against your loan origination system before finalizing the form. Even small rounding discrepancies can cause mismatches with automated underwriting system (AUS) findings.
The risk assessment section must reflect the exact recommendation language from your Desktop Underwriter (DU) or Loan Product Advisor (LPA) findings report. Paraphrasing or summarizing AUS output is a common mistake that can create compliance issues during investor review. Copy the recommendation verbatim and include the correct case file ID.
Income data entered on Form 1008/1077 must align precisely with what is documented in the full loan file, including pay stubs, tax returns, and the 1003 application. Discrepancies between the transmittal summary and supporting documents are one of the most common reasons loan packages are kicked back. Reconcile all income figures across every document before packaging the file.
Property details such as appraised value, property type, and occupancy status on Form 1008/1077 must match the appraisal report exactly. Mismatches in these fields can cause secondary market delivery failures. Always review the appraisal one final time when completing the property section of the transmittal summary.
AI-powered tools like Instafill.ai can complete mortgage underwriting forms like the 1008/1077 in under 30 seconds with high accuracy, making it a real time-saver when processing multiple loan files. Your data stays secure throughout the process, which is critical when handling sensitive borrower and financial information. Instafill.ai can also convert non-fillable PDF versions of the form into interactive, fillable documents.
The seller/servicer number and lender contact details on the transmittal summary must be accurate and up to date for proper secondary market delivery. Outdated or incorrect seller information can cause loan registration issues with Fannie Mae or Freddie Mac. Confirm these details with your secondary marketing team before submitting any loan package.
Form 1008/1077 is designed to serve as a cover sheet for the entire loan file, so it should always appear at the front of the transmittal package. Investors and agencies expect a consistent file structure, and a disorganized package can slow down the purchase review process. Establish a standard file checklist to ensure every loan is packaged the same way.
If you are delivering a conforming loan to Fannie Mae or Freddie Mac, the 1008/1077 is not optional — it is a required component of the loan delivery package. First-time filers sometimes assume it is supplemental documentation, but omitting it can result in the loan being returned. Confirm with your secondary market guidelines which loan types require the transmittal summary.
Frequently Asked Questions
Mortgage underwriting forms are standardized documents used to summarize and document the analysis behind a mortgage loan decision. They capture key data such as borrower income, property details, loan terms, and risk assessments, ensuring that all parties — lenders, investors, and agencies — have a clear record of how the loan was evaluated.
This category currently includes the Uniform Underwriting and Transmittal Summary, known as Fannie Mae Form 1008 and Freddie Mac Form 1077. It is the primary standardized form used by lenders when delivering conforming mortgage loans to the secondary market.
Mortgage lenders and originators are required to complete this form when selling or delivering conforming loans to Fannie Mae or Freddie Mac. It is typically prepared by the underwriter or loan processor as part of the loan file package.
The form must be completed and included as part of the loan file whenever a conforming mortgage loan is delivered to Fannie Mae or Freddie Mac for purchase. It serves as a cover sheet accompanying the full underwriting package at the time of secondary market delivery.
These forms generally require details about the borrower's income, employment, and credit profile, along with property information, loan terms, qualifying ratios, and risk assessment findings. The goal is to consolidate all critical underwriting data into a single, reviewable document.
The completed form is submitted as part of the loan file package to Fannie Mae or Freddie Mac, depending on which agency is purchasing the loan. It accompanies the full set of underwriting documents during the secondary market delivery process.
Yes — AI-powered tools like Instafill.ai can fill out mortgage underwriting forms such as Form 1008/1077 in under 30 seconds by accurately extracting and placing data from source documents. This significantly reduces manual data entry errors and speeds up the loan delivery process.
Manually completing a form like the Uniform Underwriting and Transmittal Summary can take 15–30 minutes depending on the complexity of the loan file. Using AI tools like Instafill.ai, the same form can be completed in under 30 seconds, with data automatically populated from existing loan documents.
Fannie Mae Form 1008 and Freddie Mac Form 1077 are actually the same standardized document — the Uniform Underwriting and Transmittal Summary — just referenced by different form numbers depending on which GSE (government-sponsored enterprise) the loan is being delivered to. The content and purpose of the form are identical.
Not all mortgage loans require this specific form — it is required for conforming loans being sold to Fannie Mae or Freddie Mac. Government-backed loans (FHA, VA, USDA) and portfolio loans held by the originating lender may use different underwriting documentation requirements.
An incomplete or inaccurate form can delay loan delivery, trigger requests for additional documentation, or result in the loan being rejected by the purchasing agency. Accuracy is critical since the form serves as the primary summary of the underwriting decision for secondary market investors.
The form is widely available, though some versions may be non-fillable PDFs. Services like Instafill.ai can convert non-fillable PDF versions into interactive fillable forms, making it easier to complete and submit the document digitally.
Glossary
- Underwriting
- The process by which a lender evaluates a borrower's creditworthiness, income, assets, and the property value to determine whether to approve a mortgage loan and on what terms.
- Secondary Market
- The market where lenders sell mortgage loans to investors (such as Fannie Mae or Freddie Mac) after origination, allowing lenders to free up capital to issue new loans.
- Conforming Loan
- A mortgage loan that meets the guidelines set by Fannie Mae and Freddie Mac, including loan limits and borrower qualification standards, making it eligible for purchase on the secondary market.
- Fannie Mae / Freddie Mac
- Government-sponsored enterprises (GSEs) that purchase conforming mortgage loans from lenders, provide liquidity to the mortgage market, and set standardized underwriting guidelines that lenders must follow.
- Qualifying Ratios
- Two key debt ratios used in mortgage underwriting: the front-end ratio (housing expenses divided by gross income) and the back-end ratio (total monthly debt divided by gross income), used to assess a borrower's ability to repay.
- Transmittal Summary
- A cover document that accompanies a mortgage loan file when delivered to an investor or agency, summarizing key underwriting data and loan characteristics in a standardized format.
- LTV (Loan-to-Value Ratio)
- The ratio of the loan amount to the appraised value or purchase price of the property, expressed as a percentage; a higher LTV indicates greater risk to the lender.
- AUS (Automated Underwriting System)
- A computer-based system (such as Fannie Mae's Desktop Underwriter or Freddie Mac's Loan Product Advisor) that analyzes loan data and issues a risk assessment recommendation, such as 'Approve/Eligible' or 'Refer.'
- Loan Originator
- The lender, broker, or financial institution that initially processes and funds a mortgage loan before it may be sold to the secondary market.
- Risk Assessment
- The evaluation of the likelihood that a borrower will default on a loan, based on factors such as credit score, income stability, property value, and loan terms, documented during the underwriting process.