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Table of Contents

    Investment Property Mortgage Requirements

    Updated: September 21 2026 • 6 min read
    Written by Bennett Leckrone
    Bennett Leckrone

    Written by
    Bennett Leckrone
    Writer / Reviewer / Expert

    Bennett Leckrone is the editorial manager and an analyst for Lower. He specializes in making complicated mortgage topics accessible for consumers. That includes both in-depth product guides and analysis on what economic moves mean for homebuyers and refinancers. He is also a licensed loan officer in Ohio, NMLS ID 2782574. He was previously a business reporter with a focus on higher education and fintech at BestColleges. In that role, he reported on the development of fintech and AI curriculum, as well as the rapidly changing nature of finance education. He also wrote guides to help business students navigate AI and online education. He also reported on state politics at Maryland Matters, with a focus on how policy affected people and businesses. He holds a bachelor of science in journalism degree from Ohio University.
    Reviewed by Neel Patel
    Neel Patel

    Reviewed by
    Neel Patel
    Reviewer

    Neel Patel is a mortgage industry professional with more than a decade of hands-on experience across loan origination, customer experience, sales operations, and strategy. He has worked at every stage of the mortgage lifecycle, from advising individual borrowers to leading teams of loan officers. As an expert reviewer, Neel evaluates mortgage and personal finance content for accuracy, clarity, and real-world applicability. He specializes in ensuring information reflects how lending actually works in practice so consumers can make confident, informed decisions.
    Our Editorial Standards

    Key Takeaways

    • If you're using a conventional loan, you'll generally need at least at least 15% down on a 1-unit property and 25% down on a 2- to 4-unit property.
    • There is no single credit-score rule that applies to every investment property mortgage. Conventional investment property loans rely heavily on automated underwriting, while non-QM programs set their own credit, reserve and documentation standards.
    • Cash reserves and rental-income treatment can materially affect qualification. Under Fannie Mae's current Desktop Underwriter rules, an investment property transaction generally requires six months of reserves for the subject property, with additional reserves when you own other financed properties.
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    Investment property mortgage requirements are generally stricter than requirements for a primary residence.

    Conventional financing can allow as little as 15% down on a 1-unit investment property, but the property must meet occupancy rules, the loan must pass automated underwriting and you may need substantial reserves in addition to your down payment and closing costs.

    Your requirements can also change based on the number of units, your other financed properties and whether you qualify through personal income or the property's rental income.

    Investment Property Mortgage Requirements

    Requirement Conventional DSCR Bank Statement Asset Qualifier
    Down payment At least 15% for a 1-unit purchase and 25% for a 2- to 4-unit purchase under current Fannie Mae and Freddie Mac maximum LTV rules Program-specific Program-specific Program-specific
    Credit Automated underwriting and lender requirements apply. There is no single universal 620 minimum for every conventional investment property file. Program-specific Program-specific Program-specific
    Income test Borrower income and debts are evaluated through conventional underwriting. Eligible rental income may also be used. Usually based primarily on property cash flow, using the lender's DSCR calculation Usually based on eligible bank deposits under the lender's calculation method Usually based on eligible assets converted into qualifying income under the lender's method
    Reserves Fannie Mae DU generally requires six months of PITIA for an investment property transaction, plus additional reserves when applicable for other financed properties Program-specific Program-specific Program-specific
    Pricing Investment-property pricing adjustments apply Lender- and investor-specific Lender- and investor-specific Lender- and investor-specific
    Loan limits Conforming limits apply to loans sold to Fannie Mae or Freddie Mac Program-specific Program-specific Program-specific
    Number of financed properties Fannie Mae DU permits up to 10 financed properties when the subject is a second home or investment property Program-specific Program-specific Program-specific

    Non-QM requirements are not set by Fannie Mae or Freddie Mac. Down payment, credit, reserve, DSCR and documentation standards vary by lender and investor, so those figures should be confirmed for the specific program rather than treated as universal rules.

    How Lenders Classify an Investment Property

    Occupancy classification comes first because it affects down payment, pricing, reserves and underwriting. Fannie Mae defines an investment property as a property the borrower owns but does not occupy. A second home is a different occupancy category, and a property you occupy as your main home is a principal residence.

    A 2- to 4-unit property is not automatically an investment property. If you buy a duplex, triplex or fourplex and occupy one unit as your principal residence, the loan is underwritten as owner-occupied rather than as an investment property. The distinction is important because owner-occupied multi-unit financing can allow higher LTVs than a non-owner-occupied investment property.

    The differences between a second home and an investment property can also affect whether anticipated rental use is compatible with the loan. More broadly, occupancy requirements vary by loan type. Misrepresenting how you plan to occupy a property can create serious underwriting and fraud concerns.

    Investment Property Down Payment Requirements

    For conventional purchases, the clearest starting point is maximum loan-to-value ratio. Fannie Mae's August 2026 Eligibility Matrix allows a maximum 85% LTV for a 1-unit investment property purchase and 75% LTV for a 2- to 4-unit investment property purchase. Freddie Mac publishes the same maximum LTVs for investment-property purchases.

    That means a borrower needs at least 15% down on a 1-unit conventional investment property and at least 25% down on a 2- to 4-unit conventional investment property, before considering lender overlays or other eligibility restrictions. The full investment property down payment requirements can also change for refinances and alternative loan programs.

    Government-backed purchase programs generally do not provide a low-down-payment path for a property purchased strictly as an investment. HUD's current FHA handbook requires owner occupancy for standard FHA principal-residence financing. The VA says a VA-backed purchase home must be for the borrower's personal occupancy, and USDA requires the financed home to be the applicant's primary residence.

    One detail that is easy to miss: 15% down does not automatically eliminate mortgage insurance. Fannie Mae publishes mortgage insurance coverage requirements for first-lien conventional loans above 80% LTV, so a 1-unit investment property financed at 85% LTV can involve private mortgage insurance depending on the loan structure.

    Credit Requirements for an Investment Property

    A blanket statement that every conventional investment property loan requires a 620 credit score is too broad under current agency rules. Fannie Mae requires investment property loans to be underwritten through Desktop Underwriter and receive an Approve/Eligible recommendation. Freddie Mac requires investment property mortgages to receive a Loan Product Advisor Accept risk class.

    Credit still matters substantially. Fannie Mae notes that loan-level price adjustments can depend on credit score and LTV, and individual lenders can apply credit overlays beyond agency requirements. A lower score may therefore affect approval, the maximum leverage available to you or the price of the loan even when there is no single score threshold that applies to every file.

    The dedicated guide to investment property credit requirements covers how credit and leverage interact in more detail.

    Cash Reserve Requirements

    Reserves are assets you still have available after closing. They are separate from the money used for the down payment and closing costs. Fannie Mae measures reserves in months of the subject property's qualifying payment, based on PITIA, which generally includes principal, interest, taxes, insurance and applicable association dues.

    For a Fannie Mae loan underwritten through Desktop Underwriter, an investment property transaction generally requires six months of reserves for the subject property. Fannie Mae's reserve rules also require additional reserves when the borrower owns other financed properties.

    Those additional reserves are calculated as a percentage of the aggregate unpaid principal balance on certain other financed properties. Under the current Fannie Mae rule, the percentage is 2% when the borrower has one to four financed properties, 4% with five to six and 6% with seven to 10. The subject property and the borrower's principal residence are excluded from that aggregate calculation.

    Because the requirement can grow quickly for borrowers with several mortgages, it is worth separating investment property reserve requirements from the amount needed to close.

    Income and Rental Income

    Conventional investment property underwriting can use both your personal qualifying income and eligible rental income. The treatment of rent is specific, and recent Fannie Mae guidance is more nuanced than simply counting a lease at face value.

    For a purchase, Fannie Mae's September 2026 rental-income policy generally starts with monthly gross rent documented through the applicable appraisal rent schedule and, when required, a lease. The lender multiplies gross rent by 75%, then subtracts the subject property's PITIA to calculate adjusted net rental income.

    For example, if documented monthly gross rent is $2,400, 75% equals $1,800. If PITIA is $1,950, the adjusted rental amount is negative $150. That negative amount must be considered in qualifying. When the calculation is positive, how much can be used depends in part on the borrower's rental-property management history under the agency rules.

    The details are covered in the guide to using rental income to qualify for an investment property. Borrowers whose W-2 or tax-return income does not fit conventional underwriting may also have investment property financing options without W-2 income, including lender-specific non-QM programs.

    DTI and Qualifying Ratios

    Debt-to-income ratio compares qualifying monthly debt obligatio

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