What Makes HeritageOne Mortgages Different
HeritageOne mortgages follow stricter underwriting standards than standard Fannie Mae loans. These loans target borrowers who need higher loan-to-value ratios but can demonstrate strong creditworthiness and income stability.
The program requires either an automated Accept decision from Loan Product Advisor or manual underwriting with specific credit score minimums. You cannot get a HeritageOne mortgage with a Caution recommendation from the automated system.
If you're buying a 2-4 unit investment property, you must receive an Accept recommendation. Manual underwriting is not available for these properties under the HeritageOne program.
Credit Score Requirements for Manual Underwriting
When Loan Product Advisor cannot provide an Accept recommendation, lenders can manually underwrite your HeritageOne mortgage if you meet minimum credit score thresholds.
For purchase transactions on single-family homes, you need a minimum credit score of 660. For refinances, the minimum jumps to 680. Manufactured homes require a 680 minimum score regardless of transaction type.
Say you're buying your first home with a 665 credit score and putting 5% down. If Loan Product Advisor gives you a Caution recommendation, your lender can still approve the loan through manual underwriting because you exceed the 660 minimum.
When One Borrower Has Limited Credit History
HeritageOne mortgages allow for situations where one borrower lacks sufficient credit history. The borrower with limited credit can still participate in the loan if specific conditions are met.
The borrower with insufficient credit history cannot have any derogatory items like liens, judgments, or collections on their credit report. At least one other borrower must have acceptable credit and contribute income and assets for qualification.
The borrower with limited credit history can contribute income, but their contribution cannot exceed 30% of the total qualifying income used for the loan.
Consider a married couple where the husband has been in the U.S. for two years with minimal credit history, while the wife has established credit and earns $60,000 annually. The husband can contribute up to $25,714 in income (30% of their combined $85,714 total) without disqualifying the application.
Debt-to-Income Ratio Limits
HeritageOne mortgages do not impose maximum housing expense ratios for most borrowers. Your monthly mortgage payment can represent any percentage of your gross monthly income, provided you meet other qualification requirements.
The program does limit your total monthly debt payments. For manually underwritten single-family properties, your total debt-to-income ratio cannot exceed 45%. This includes your new mortgage payment plus all other monthly debt obligations.
Manufactured homes that receive Caution recommendations face stricter limits with a maximum 36% debt-to-income ratio.
If Loan Product Advisor provides an Accept recommendation, the system determines your maximum allowable debt-to-income ratio based on your complete financial profile. These automated decisions can sometimes approve higher ratios than manual underwriting allows.
Maximum Loan-to-Value Ratios
HeritageOne mortgages allow higher loan-to-value ratios than many conventional programs. Single-family homes can finance up to 97% of the property value, meaning you need only a 3% down payment.
Investment properties with 2-4 units have a 95% maximum loan-to-value ratio, requiring at least 5% down. CHOICEHomes properties also qualify for 97% financing.
The program allows total loan-to-value ratios up to 105% when you combine your first mortgage with an Affordable Second mortgage for down payment assistance.
A borrower purchasing a $300,000 home could obtain a $291,000 first mortgage (97% LTV) and potentially add an Affordable Second for closing costs, bringing the total loan amount to $315,000 (105% TLTV).
Property Value Determination
Lenders must establish property value according to standard Fannie Mae appraisal requirements found in Section 4203.1(a). The loan-to-value calculation uses this appraised value, not the purchase price if it's higher.
For refinance transactions, the appraised value determines your maximum loan amount. Purchase transactions use the lower of the appraised value or purchase price.
Documents You'll Need for Manual Underwriting
Manual underwriting requires comprehensive documentation of your credit history, income, and assets. Lenders need complete tax returns, pay stubs, bank statements, and employment verification letters.
Credit documentation becomes especially important since you're not relying on an automated approval. Expect to provide written explanations for any credit inquiries, account closures, or payment variations in the past two years.
Income documentation must follow standard Fannie Mae requirements detailed in other sections of the Selling Guide. Variable income sources require two-year histories and careful analysis of stability trends.
Common Complications with HeritageOne Mortgages
The biggest challenge comes from the Accept-or-manual-underwriting requirement. If Loan Product Advisor issues a Caution recommendation and your credit score falls below manual underwriting minimums, you cannot qualify for a HeritageOne mortgage.
Borrowers often assume they can qualify with lower credit scores because of the high loan-to-value ratios available. The program actually requires stronger credit profiles than standard conventional loans in many cases.
Investment property buyers face the most restrictive requirements since manual underwriting is not available. You must receive an automated Accept recommendation, which typically requires excellent credit and strong cash reserves.
Condominium purchases may face additional loan-to-value restrictions depending on the project's approval status with Fannie Mae. These limits can reduce your maximum financing below the standard 97% threshold.
Why These Rules Exist
Fannie Mae designed HeritageOne mortgages to serve creditworthy borrowers who need high loan-to-value financing but may not qualify for other high-LTV programs. The stricter credit requirements offset the increased risk from minimal down payments.
The Accept-or-manual-underwriting structure ensures that either automated risk assessment approves the loan or a human underwriter can verify the borrower's creditworthiness through detailed analysis.
Investment property restrictions reflect the higher risk associated with non-owner-occupied properties. Fannie Mae requires automated approval to ensure these loans meet specific risk parameters without manual intervention.
References
For the official guidelines, see 4504.6: Underwriting requirements, qualifying ratios and maximum loan-to-value (LTV)/total LTV (TLTV) ratios for HeritageOne® Mortgages in the Fannie Mae Selling Guide.
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Original Freddie Mac Guideline Text
This section contains requirements related to:
Qualifying ratios
Maximum loan-to-value (LTV)/total LTV (TLTV) ratios
(a)
Underwriting
The Mortgage must be an Accept Mortgage or a Manually Underwritten Mortgage. Mortgages secured by 2- to 4-unit properties must be Accept Mortgages.
For Manually Underwritten Mortgages:
Each Borrower individually, and all Borrowers collectively, must have an acceptable credit reputation (as described in
Topics 5100
and
5200
for Manually Underwritten Mortgages)
An individual Borrower with insufficient credit history for whom the Seller cannot document a credit reputation is considered to have an acceptable credit reputation if:
No evidence of derogatory credit, such as a lien, judgment or collection, paid or unpaid, is reflected on the credit report or elsewhere in the Mortgage file with respect to such Borrower; and
At least one other Borrower whose income and assets are used for qualification has an acceptable credit reputation
Any income contributed by the Borrower with insufficient credit history may be considered as qualifying income if the amount contributed by such Borrower is not more than 30% of the total qualifying income.
The minimum Indicator Scores for Manually Underwritten Mortgages are:
Minimum Indicator Scores for Manually Underwritten HeritageOne
®
1
Purchase transaction Mortgages secured by 1-unit properties
660
“No cash-out” refinance Mortgages secured by 1-unit properties
680
680
1
The minimum Indicator Scores are also in
Exhibit 25, Mortgages with Risk Class and/or Minimum Indicator Score Requirements
.
(b)
Qualifying ratios
There is no maximum monthly housing expense-to-income ratio, except for Manually Underwritten Mortgages that include a non-occupying Borrower. See
Section 5103.1
for additional requirements for Mortgages that include a non-occupying Borrower.
®
Mortgages, the maximum monthly debt payment-to-income (DTI) ratio is determined by Loan Product Advisor.
For Manually Underwritten Mortgages, the maximum monthly DTI ratios are:
Maximum monthly DTI ratios for Manually Underwritten HeritageOne Mortgages
1-unit properties
1
45%
Manufactured Homes that are Caution Mortgages
36%
1
Section 5103.1
for additional requirements for Mortgages that include a non-occupying Borrower.
Note: The Borrower’s monthly DTI ratio must be underwritten pursuant to
Section 5401.2
.
(c)
Maximum LTV/TLTV ratios
The value used to calculate the LTV/TLTV ratios must be established pursuant to
Section 4203.1(a)
.
The following maximum LTV/TLTV ratios apply to both purchase transaction and “no cash-out” refinance Mortgages:
Maximum LTV/TLTV ratios for HeritageOne Mortgages
1-unit properties
1
97%
2
2- to 4-unit properties
95%
2
®
97%
2
1,
3
1
Section 5103.1
for additional requirements for Mortgages that include a non-occupying Borrower.
2
A TLTV ratio not exceeding 105% is permitted when secondary financing is an Affordable Second
®
.
3
If permitted under the Seller’s Purchase Documents, see
Section 5706.5
for additional requirements for Manufactured Homes on leasehold estates.
Note: The maximum LTV/TLTV ratios may be lower for a Condominium Unit Mortgage depending on the project review type or whether the Mortgage is exempt from project review (see
Chapter 5701
).

