Desktop Underwriter vs. Loan Product Advisor: What’s the Difference?
Want to see what you qualify for? I can run your numbers and give you a clear answer quickly.
Desktop Underwriter vs. Loan Product Advisor
Fannie Mae Desktop Underwriter and Freddie Mac Loan Product Advisor are the two primary automated underwriting systems used for conventional mortgages.
Desktop Underwriter is commonly called DU.
Loan Product Advisor is commonly called LPA.
Both systems help lenders evaluate:
Credit risk
Mortgage eligibility
Income
Assets
Monthly debts
Debt-to-income ratio
Loan-to-value ratio
Financial reserves
Occupancy
Property type
Loan purpose
Documentation requirements
Although DU and LPA perform similar functions, they are not identical.
Fannie Mae and Freddie Mac maintain separate mortgage guidelines, eligibility requirements, risk models, and documentation standards.
As a result, the same borrower and transaction may receive a different recommendation from each system.
A loan that does not receive an acceptable result through DU may receive an Accept result through LPA.
The opposite can also occur.
That does not mean one system is universally easier.
It means a complete mortgage application may fit one agency’s requirements or risk model better than the other.
Understanding the difference can be especially important for borrowers with:
High debt-to-income ratios
Limited credit history
Variable income
Positive rent history
Significant financial reserves
Multiple financed properties
Complex property characteristics
A loan that narrowly misses an automated approval
Borrowers who want a broader introduction to automated mortgage technology should begin with Automated Underwriting Systems Explained.
What Is Desktop Underwriter?
Desktop Underwriter is Fannie Mae’s automated underwriting system.
Mortgage lenders submit the borrower’s application and loan information to DU for an automated credit-risk and eligibility assessment.
The submission may include:
Borrower information
Credit-report data
Employment
Qualifying income
Monthly liabilities
Assets
Financial reserves
Loan amount
Purchase price
Property value
Property type
Occupancy
Loan purpose
Interest rate
Mortgage term
DU evaluates the information and returns an Underwriting Findings report.
That report contains:
The underwriting recommendation
Eligibility status
Documentation requirements
Verification requirements
Messages related to credit, income, assets, debts, and property
Potential errors or warnings
Conditions the lender must address
The lender must review the complete findings and confirm that the information submitted to DU is accurate and adequately documented.
What Results Can DU Produce?
Common DU recommendations include:
Approve/Eligible
Approve/Ineligible
Refer with Caution
Out of Scope
Each result means something different.
DU Approve/Eligible
Approve/Eligible generally means DU’s credit-risk assessment is acceptable and the mortgage appears eligible for delivery to Fannie Mae based on the information submitted.
This is a favorable automated result.
It is not final mortgage approval.
The lender must still verify:
Income
Employment
Assets
Debts
Credit information
Property eligibility
Appraisal
Title
Insurance
Occupancy
Loan terms
Required documentation
A loan can lose its valid Approve/Eligible result if the documentation does not support the data entered.
DU Approve/Ineligible
Approve/Ineligible generally means DU’s credit-risk assessment is acceptable, but the loan appears ineligible for delivery to Fannie Mae.
The ineligibility may relate to:
Loan characteristics
Property
Occupancy
Loan purpose
Transaction structure
Program restrictions
Other eligibility requirements
The lender must identify the specific reason.
Some issues can be corrected.
Others may require a different mortgage program or agency path.
DU Refer With Caution
Refer with Caution means DU did not issue an acceptable automated approval recommendation.
The lender must determine whether:
The submitted data is incorrect.
The loan can be legitimately restructured.
The loan is eligible for manual underwriting.
A different mortgage program is appropriate.
The borrower needs to improve the financial profile.
The loan is presently ineligible.
A Refer with Caution result is not automatically a permanent denial.
It is also not automatically eligible for manual underwriting.
The complete file and applicable guidelines must be reviewed.
DU Out of Scope
Out of Scope generally indicates that DU cannot provide its standard underwriting recommendation for the transaction as submitted.
This may involve a loan, borrower, product, or transaction characteristic outside DU’s supported scope.
The lender must determine the appropriate underwriting method and whether the loan remains eligible.
Fannie Mae maintains the current DU recommendations and requirements in its Desktop Underwriter section of the Selling Guide.
What Is Loan Product Advisor?
Loan Product Advisor is Freddie Mac’s automated underwriting system.
Mortgage lenders submit borrower, credit, loan, and property information to LPA for an automated assessment.
LPA returns a Feedback Certificate containing:
Risk class
Documentation requirements
Eligibility messages
Credit messages
Income and asset messages
Property information
Warnings
Other instructions
For conventional mortgages, the primary LPA risk classes are:
Accept
Caution
LPA Accept
An Accept risk class indicates that the loan received an acceptable automated credit-risk assessment based on the information submitted.
The lender must still verify the application and satisfy the Feedback Certificate.
An Accept result does not establish that:
The borrower’s income is documented correctly.
All assets are acceptable.
Every debt has been included.
The property is eligible.
The appraisal is acceptable.
The title is clear.
The loan is guaranteed to close.
Freddie Mac requires the final valid Feedback Certificate to reflect the actual transaction, subject to its resubmission requirements.
LPA Caution
A Caution risk class means the mortgage did not receive an Accept result.
For an otherwise eligible conventional mortgage to be delivered to Freddie Mac, the lender generally must manually underwrite a Caution loan according to Freddie Mac’s requirements.
The lender must assess:
Credit reputation
Capacity
Collateral
Risk layering
Compensating or offsetting factors
Freddie Mac describes a Caution result as a strong indication that the loan may contain excessive risk layering and may be unlikely to satisfy its requirements without an acceptable manual analysis. Freddie Mac Seller/Servicer Guide
A lender may impose an overlay requiring an LPA Accept result and refuse to offer manual underwriting.
How DU and LPA Are Similar
DU and LPA both help lenders perform an initial risk and eligibility assessment.
Both systems:
Use information from the mortgage application.
Evaluate credit-report data.
Consider income and monthly debts.
Review debt-to-income ratio.
Consider loan-to-value ratio.
Evaluate financial reserves.
Review occupancy and loan purpose.
Provide documentation requirements.
Generate findings or feedback messages.
Require accurate data.
Require lender verification.
May require resubmission when information changes.
Do not replace the human underwriter.
Do not guarantee final approval.
Do not approve the property merely by approving the borrower’s credit profile.
Both systems evaluate the complete interaction between multiple risk factors.
Neither system bases its decision solely on the borrower’s credit score.
How DU and LPA Are Different
DU and LPA are based on different agency requirements and risk models.
The differences may involve:
Credit-risk assessment
Eligibility rules
Income treatment
Debt treatment
Documentation requirements
Property requirements
Loan products
Reserve requirements
Treatment of borrowers with limited credit
Treatment of positive rent history
Cash-flow assessment
Manual-underwriting options
Resubmission requirements
Special programs
Fannie Mae’s underwriting result determines whether the loan appears acceptable for delivery to Fannie Mae.
Freddie Mac’s result determines whether the loan appears acceptable for delivery to Freddie Mac.
A favorable result from one system does not mean the loan is automatically eligible for the other agency.
Can DU and LPA Produce Different Results?
Yes.
The same borrower and loan may receive:
DU Approve/Eligible and LPA Caution
DU Refer with Caution and LPA Accept
Different documentation requirements from each system
Different eligibility messages
Different assessments after a loan variable changes
This can occur even when the lender submits accurate information to both systems.
The systems are not required to reach identical conclusions.
A different result may reflect:
Different risk modeling
Different treatment of the overall credit profile
Different program eligibility
Different documentation requirements
Different treatment of reserves
Different treatment of rent history or cash flow
Different property or loan characteristics
The fact that one system approves the loan does not mean the other system made a mistake.
Is DU Easier Than LPA?
Not universally.
DU may provide the better result for one borrower.
LPA may provide the better result for another.
The answer depends on the complete application.
A borrower’s result may be influenced by:
Credit depth
Payment history
Credit utilization
Debt-to-income ratio
Reserves
Down payment
Loan-to-value ratio
Housing-payment history
Property type
Occupancy
Loan purpose
Income structure
A loan officer should not assume that every difficult conventional loan belongs in one system.
The file should be evaluated accurately under both agency paths when appropriate.
Is LPA More Flexible With Debt-to-Income Ratio?
Not as a universal rule.
Both systems evaluate debt-to-income ratio as part of a larger risk assessment.
A high ratio may be acceptable in one file and unacceptable in another because of differences involving:
Credit history
Financial reserves
Loan-to-value ratio
Housing-payment increase
Occupancy
Loan purpose
Other risk factors
One system may produce a more favorable result for a particular borrower, but that should not be converted into a blanket statement that DU or LPA always permits higher ratios.
What Is Debt-to-Income Ratio? explains why the ratio is only one part of mortgage qualification.
Can Positive Rent History Help With DU?
Yes, when the applicable requirements are satisfied.
DU can consider positive rent-payment history identified through:
A credit report
An eligible asset-verification report
The lender must enter the borrower’s rent payment accurately and comply with Fannie Mae’s requirements.
Fannie Mae also permits DU to perform a cash-flow assessment for certain borrowers when the lender submits an eligible third-party asset-verification report containing 12 months of account data.
The assessment may consider transaction patterns and balance trends.
These features can potentially improve the risk assessment for eligible borrowers, particularly those with limited traditional credit.
Fannie Mae explains these capabilities in its DU rent-payment and cash-flow guidance.
Can Positive Rent History Help With LPA?
Yes, when the applicable requirements are met.
LPA may consider positive rent-payment history through an eligible asset-verification report or another permitted submission method.
Freddie Mac states that positive rent history may potentially upgrade a Caution risk class to Accept.
LPA can also evaluate positive borrower cash flow using an asset-verification report with at least 12 months of account data.
Freddie Mac states that its cash-flow assessment can only positively affect the risk assessment.
A favorable change is possible, but it is not guaranteed.
The borrower and loan must still satisfy the applicable Freddie Mac requirements. Freddie Mac Loan Product Advisor FAQ
If you want help walking through your specific situation, I can run the numbers with you.
What Information Must Be Submitted Accurately?
Both systems depend on accurate data.
Important fields include:
Borrower identity
Employment status
Self-employment status
Qualifying income
Monthly debts
Real estate owned
Rental income
Asset balances
Reserves
Down payment
Loan amount
Purchase price
Property value
Property type
Occupancy
Loan purpose
Interest rate
Loan term
Mortgage insurance
The automated result may be invalid when one or more of these items is inaccurate.
Income Must Be Calculated Before It Is Entered
AUS technology evaluates the income entered by the lender.
It does not automatically mean that the entered income is eligible.
For example, the borrower may receive:
Overtime
Bonus income
Commission income
RSUs
Rental income
Self-employment income
The loan professional must first determine how much income can be used under the applicable agency guidelines.
If the borrower receives $200,000 annually but only $160,000 is eligible qualifying income, the lender cannot enter the higher amount merely because it produces an approval.
Borrowers with variable compensation can review Using Bonus Income to Qualify for a Mortgage and Can RSU Income Be Used to Qualify for a Mortgage?
Business owners should review How Self-Employed Income Is Calculated for Approval.
Monthly Debts Must Be Entered Correctly
The credit report may not display every required payment accurately.
Potential issues include:
Student loans with no reported payment
Deferred accounts
Co-signed debts
Business debts
Tax-payment plans
Child support
Alimony
Mortgages not appearing on credit
Recently opened accounts
Debts scheduled to be paid at closing
The lender must determine which obligations must be included and how the payment should be calculated.
Incorrectly excluding a debt can create an automated approval that cannot be supported during underwriting.
Assets Cannot Be Duplicated or Overstated
The lender must enter assets that are:
Owned or available to the borrower
Acceptable under the applicable guidelines
Properly documented
Available for the intended purpose
The same money should not be counted twice merely because it appears in multiple places during a transfer.
Funds needed for closing must also be distinguished from reserves remaining after closing.
Why Lenders Ask for Bank Statements explains how lenders verify ownership, availability, and source of funds.
Occupancy Must Reflect the Borrower’s Actual Intent
The property may be classified as:
Primary residence
Second home
Investment property
Occupancy affects:
Eligibility
Pricing
Down payment
Reserve requirements
Property requirements
Automated risk assessment
The lender cannot submit a property as a primary residence merely because that produces a more favorable result.
Property Type Must Be Accurate
A condominium, manufactured home, two-unit property, and detached single-family residence may be treated differently.
An incorrect property classification can invalidate the automated findings.
The credit-risk result also does not replace the appraisal or project review.
When Should a Lender Run Both DU and LPA?
Running both systems may be appropriate when:
A conventional loan does not receive an acceptable result through one agency.
The borrower’s profile may fit the other agency better.
The transaction is eligible for both Fannie Mae and Freddie Mac.
The documentation can satisfy the selected agency’s requirements.
The lender is approved to deliver through the applicable path.
The purpose should be to identify a legitimate agency solution.
It should not be to conceal information or manipulate the application.
When Should a Lender Not Switch Systems?
Switching systems may not solve the problem when:
The borrower lacks sufficient qualifying income.
A required debt was omitted.
The assets cannot be verified.
The property is ineligible under both agencies.
The borrower does not satisfy a required waiting period.
The occupancy is incorrect.
The credit history is unacceptable.
The loan violates both agencies’ eligibility requirements.
A lender overlay applies regardless of the AUS.
A different automated result cannot cure a fundamental eligibility problem.
Can the Loan Officer Change Data to Get an Approval?
Only when correcting inaccurate information or legitimately changing the loan structure.
Valid changes might include:
Correcting an income calculation
Adding eligible income that was omitted
Correcting a debt
Documenting an eligible debt exclusion
Reducing the loan amount
Increasing the down payment
Adding verified reserves
Correcting the property type
Changing the loan program
The lender cannot legitimately:
Inflate income
Omit debts
Overstate assets
Misstate occupancy
Hide other property ownership
Misclassify self-employment
Enter unsupported rental income
Change facts simply to produce a desired result
The final application and documentation must support the data used to obtain the findings.
What Happens When a Loan Is Resubmitted?
A mortgage may need to be resubmitted when material information changes.
Examples include:
New credit report
New debt
Changed income
Changed assets
Different loan amount
Different interest rate
Lower appraisal
Changed purchase price
Changed down payment
Changed occupancy
Changed loan purpose
Changed property type
The new submission may produce:
The same result
A better result
A less favorable result
New documentation requirements
New eligibility messages
The lender must rely on the final valid findings applicable to the actual transaction.
Freddie Mac requires the last Feedback Certificate to be based on accurate data and warns that the risk class or documentation level may change when resubmission is required. Freddie Mac Seller/Servicer Guide
Can an Underwriter Disagree With DU or LPA?
The underwriter must determine whether the documented file supports the automated findings.
An underwriter may identify:
Ineligible income
Missing debt
Unsupported assets
Incorrect occupancy
A property problem
A lender overlay
Fraud or misrepresentation
A required resubmission
Another issue not resolved by the automated result
The underwriter cannot treat an unsupported Approve/Eligible or Accept result as final approval.
The system evaluated data.
The underwriter evaluates the documents supporting that data and the loan’s compliance with the complete guidelines.
Why Does My Underwriter Keep Asking for More Documents? explains why an automated approval can still produce significant documentation requests.
Does One System Require Less Documentation?
Potentially, for a particular file.
DU and LPA may return different documentation requirements based on:
Loan characteristics
Borrower profile
Verification services used
Income type
Asset type
Credit history
System findings
Agency requirements
A less burdensome documentation requirement is useful only when the loan is otherwise eligible and the lender can satisfy the selected agency’s rules.
The goal should be a correct and supportable loan—not simply the shortest findings report.
What Are Lender Overlays?
A lender overlay is an additional requirement imposed beyond the agency’s baseline guidelines.
Examples might include:
Higher credit-score requirement
Lower maximum debt-to-income ratio
Additional reserves
Stricter mortgage-history requirements
Restrictions on manual underwriting
Restrictions on property types
Additional income documentation
A borrower may receive DU Approve/Eligible or LPA Accept and still fail to satisfy a lender overlay.
That is why borrowers should identify whether a denial comes from:
Fannie Mae or Freddie Mac eligibility
The automated risk assessment
The supporting documentation
The property
The individual lender’s overlay
Why One Mortgage Lender Says No—And Another Says Yes explores these distinctions.
What Happens if Neither DU Nor LPA Approves the Loan?
The file should be carefully diagnosed.
Possible next steps include:
Correcting inaccurate data
Recalculating income
Including eligible assets
Documenting additional reserves
Reducing monthly debt
Increasing the down payment
Reducing the loan amount
Evaluating manual underwriting
Considering FHA financing
Considering VA financing for an eligible veteran
Considering USDA financing for an eligible borrower and property
Considering an appropriate non-QM program
Waiting while the borrower improves the credit or financial profile
The answer depends on why the systems did not approve the loan.
A different loan program should not be selected solely because it produces an approval. The program should also fit the borrower’s finances, property, and long-term objectives.
DU and LPA for FHA Loans
FHA loans may be submitted through DU or LPA, but the FHA TOTAL Mortgage Scorecard provides the FHA-specific risk classification.
FHA TOTAL returns:
Accept
Refer
TOTAL is not the same as Fannie Mae’s conventional DU risk model or Freddie Mac’s conventional LPA risk model.
An FHA Accept result remains subject to verification and FHA requirements.
An FHA Refer generally requires manual underwriting by an FHA Direct Endorsement underwriter.
DU and LPA for VA Loans
VA loans may also be evaluated through approved automated underwriting technology.
The lender must still apply VA-specific requirements involving:
Entitlement
Certificate of Eligibility
Residual income
Funding fee
Occupancy
Appraisal
Property eligibility
An automated VA result does not convert the loan into a conventional Fannie Mae or Freddie Mac mortgage.
DU or LPA may serve as the delivery technology, but the VA program requirements control the loan.
Common DU and LPA Misconceptions
“DU Is Fannie Mae and LPA Is Freddie Mac, So They Should Produce the Same Answer.”
Fannie Mae and Freddie Mac are separate enterprises with different systems, requirements, and risk models.
“LPA Is Always More Flexible.”
LPA may produce a better result for a particular file, but it is not universally more flexible.
“DU Is Better for High Credit Scores.”
A strong credit score is only one part of DU’s complete assessment.
“If Either System Approves the Loan, It Is Guaranteed.”
The lender must still validate the data, documentation, property, and transaction.
“A Different Result Means Someone Entered the Loan Incorrectly.”
Not necessarily.
Accurate submissions can produce different results because the systems are different.
“We Can Use Whichever Findings Require the Least Documentation.”
The lender must use the findings associated with the agency, program, and final transaction through which the loan will be completed.
Real Lender Perspective
DU and LPA are most valuable when they are used as diagnostic tools rather than simple approval buttons.
Imagine a borrower with:
Stable W-2 income
A high debt-to-income ratio
Strong retirement assets
Limited liquid reserves
A long positive rent history
A modest down payment
DU may evaluate that combination differently from LPA.
If one system does not approve the loan, the correct response is not to assume the borrower is unqualified.
The loan professional should determine:
Was the income calculated correctly?
Were all assets entered?
Were reserves categorized correctly?
Was the rent payment entered accurately?
Were all debts included?
Is the property type correct?
Is the loan eligible for both agencies?
Does one agency provide a legitimate advantage?
Will the lender accept the resulting recommendation?
Can the findings be fully documented?
Sometimes the second system provides a valid approval path.
Other times, both systems identify a genuine weakness that requires restructuring or time.
The expertise lies in understanding the difference.
Who This Guide Is For
This guide may be helpful for:
Conventional mortgage borrowers
First-time homebuyers
Borrowers with high debt-to-income ratios
Borrowers with limited credit history
Borrowers with strong rent-payment history
Self-employed borrowers
Borrowers with variable income
Borrowers with significant reserves
Borrowers receiving conflicting preapproval answers
Real estate professionals reviewing a preapproval
Anyone whose loan did not initially receive automated approval
DU vs. LPA FAQs
Can a Mortgage Lender Run Both DU and LPA?
Potentially, when the loan is eligible for both Fannie Mae and Freddie Mac evaluation.
Lender procedures may vary.
Does Running Both Systems Affect My Credit?
The lender may be able to use the same mortgage credit report when evaluating the application through both systems.
The effect depends on how and when the lender obtains credit—not simply on the number of AUS submissions.
Can DU Approve a Loan That LPA Declines?
Yes.
DU may issue Approve/Eligible while LPA issues Caution.
The reverse can also happen.
Which Is Better for a First-Time Homebuyer?
Neither system is universally better.
Both have features that may consider eligible positive rent history or borrower cash flow.
The result depends on the complete borrower and loan profile.
Which Is Better for a High Debt-to-Income Ratio?
There is no universal answer.
Both systems consider the ratio alongside other risk factors.
Can I Ask My Lender to Try the Other System?
Yes.
The lender can determine whether the loan is eligible for evaluation through the other agency and whether doing so is appropriate.
Does LPA Caution Mean the Loan Is Denied?
Not automatically.
The lender must determine whether the loan can be manually underwritten, restructured, or approved through another eligible program.
Does DU Refer With Caution Mean I Need FHA?
Not necessarily.
The borrower may have a conventional manual-underwriting path, an LPA Accept result, or another legitimate conventional solution.
FHA may also be appropriate, depending on the complete file.
Can a Loan Switch From Fannie Mae to Freddie Mac During Underwriting?
Potentially.
The lender must evaluate the loan under Freddie Mac’s requirements, obtain the appropriate LPA result, and confirm that the documentation and transaction are eligible.
The switch may create different conditions or documentation requirements.
Can an AUS Result Change After the Appraisal?
Yes.
A lower value may change the loan-to-value ratio and require resubmission.
Property information may also affect eligibility.
Final Thoughts
Desktop Underwriter and Loan Product Advisor perform similar roles, but they do not always produce the same answer.
DU evaluates loans under Fannie Mae’s requirements and risk model.
LPA evaluates loans under Freddie Mac’s requirements and risk model.
Both systems analyze the interaction between:
Credit
Income
Debts
Assets
Reserves
Loan-to-value ratio
Occupancy
Loan purpose
Property information
Other risk characteristics
A favorable result from either system is an important step.
It is not final approval.
The lender must still verify that the complete mortgage file supports the information submitted.
When one system does not approve the loan, the other may provide a legitimate path.
But switching systems should be based on accurate information and a valid agency strategy.
It should never depend on hiding debt, inflating income, overstating assets, or misrepresenting occupancy.
The strongest mortgage structure is not the one that simply produces an approval message.
It is the one that satisfies the selected agency’s requirements, can be fully documented, and remains approved through closing.
Suggested Internal Links
- Automated Underwriting Systems Explained
- Mortgage Underwriting Explained
- Manual Mortgage Underwriting Explained
- What Happens During Underwriting
- Why One Mortgage Lender Says No—And Another Says Yes
- Can I Get a Second Opinion on My Mortgage?
- Conditional Approval vs. Final Approval
- Mortgage Suspended During Underwriting
- Why Does My Underwriter Keep Asking for More Documents?
- What Is Debt-to-Income Ratio?
- High Debt-to-Income?
- Why Lenders Ask for Bank Statements
- What If My Credit Isn’t Perfect?
- Using Bonus Income to Qualify for a Mortgage
- How Self-Employed Income Is Calculated for Approval