What is Fannie Mae (FNMA)? A guide for home buyers

Fannie Mae, the Federal National Mortgage Association (FNMA), is a name you've likely encountered if you've ever applied for a mortgage. While many borrowers know it exists and have a sense of its importance in the housing market, fewer understand what Fannie Mae does or why it matters to their home purchase.

Your mortgage might be sold to Fannie Mae after closing, which is why learning how this investor operates can give you a better understanding of the lending process and help you make more informed decisions about your home financing options.

What does Fannie Mae do?

Fannie Mae is a government-sponsored enterprise (GSE) that buys mortgage loans from commercial banks and other lenders and guarantees, or backs, these loans on the mortgage market. The mortgages are bundled and sold as mortgage-backed securities to investors to inject liquidity into the mortgage market, enable more home loan lending, and make housing more affordable.

In other words, Fannie Mae is like a bank for other banks. It buys mortgages from banks to help them free up cash, which allows them to offer new loans to borrowers.

How do Fannie Mae (FNMA) loans work?

Because Fannie Mae doesn’t originate loans, you can’t get your mortgage directly from this GSE. Banks and non-bank lenders like Rocket Mortgage are responsible for collecting a client’s application, underwriting the loan by verifying income, assets, and property value, and getting them to the closing table. Once the loan closes, Fannie Mae buys loans that meet its requirements from lenders.

Fannie Mae conforming loan limits

The Federal Housing Finance Agency (FHFA) sets conforming loan limits for Fannie Mae. For 2026, the limits are $832,750 for a single-unit property or $1,249,125 for single-unit properties in high-cost areas. Mortgage loans that follow these guidelines are known as conforming mortgages and are guaranteed by Fannie Mae. This means they’ll make investors whole if the borrower defaults. Fannie Mae packages these loans into mortgage-backed securities (MBS) before selling them on the open bond market to investors.

Fannie Mae and Freddie Mac will not buy loans that don’t conform to FHFA limits. This means lenders who make non-conforming loans or jumbo loans that don’t follow these guidelines take on more risk. Borrowers may face stricter requirements like higher down payments and possibly higher interest rates when they take out this kind of loan because these loans are seen as possibly less secure.

Fannie Mae loan requirements

You can speak with a Home Loan Expert about your situation, but here is a short list of general guidelines for Fannie Mae loan approval:

Credit score

Though Fannie Mae and its competitor Freddie Mac once required a credit score of at least 620, both removed this requirement in 2025 in favor of a risk-based analysis of the borrower’s overall financial situation. Borrowers should still expect to present as strong a profile as possible, which means you should check your credit score and have any errors on it corrected before applying for a loan.

Debt-to-income ratio (DTI)

Your debt-to-income ratio (DTI), which compares your monthly debt payments to your before-tax monthly income, should be no higher than 50% in most cases to qualify for a Fannie Mae loan. This may need to be lower depending on your situation.

To calculate DTI, divide your total monthly debt payments by your gross monthly income. For example, if you have $2,000 in monthly debt payments and make $5,000 per month, your DTI would be 40% ($2,000 / $5,000).

Down payment

The down payment requirements are higher for second homes and investment properties, but for a single-unit primary residence, the down payment needed for a Fannie Mae loan could be anywhere from 3% to 5%.

Keep in mind, however, that if you put down less than 20% on a conventional loan, you’ll have to pay private mortgage insurance (PMI) until you have 20% equity.

Reserves

Reserves represent the number of mortgage payments lenders want to see in your account in case you experience a loss of income or other financial hardship. Your reserves could be up to 6 months with a Fannie Mae loan, although 2 months is generally a good starting point. You should speak with your lender or a mortgage professional to get more information.

Reserves are not generally required for a primary residence. Only second homes and investment properties usually require them unless there are other risks in your borrower profile.

Fannie Mae mortgage programs

Fannie Mae is a mortgage investor, but they have programs intended to help everyone from home buyers to current homeowners and even renters.

HomeReady®

Available for both first-time buyers and repeat home buyers, the HomeReady^{® 1} program allows you to buy a home, refinance to lower your rate, and/or change your loan term with as little as 3% down or in existing equity.

Because it’s intended to help clients with low to moderate income, those on the loan can’t make more than 80% of the area median income between them. Fannie Mae does have an option to put 3% down without income limits, but at least one client must be a first-time home buyer.

The HomeReady® program has a $2,500 credit that goes toward closing costs if you make half the area median income or less where you're looking to buy.

HomePath®

HomePath^® is the site where Fannie Mae features foreclosures that it’s taken possession of to resell, also known as real estate-owned (or REO) properties. This means these properties are typically sold as is, and they often require some work. However, you may be able to get a good deal.

97% LTV program

The 97% LTV program allows home buyers to put as little as 3% down on a home, resulting in a loan-to-value ratio of 97%. These loan options are available to first-time home buyers and those refinancing a Fannie Mae loan. Requirements for income limits and home buyer education must be met to qualify.

RefiNow™

The RefiNow™ program offers options for homeowners who have experienced difficulty qualifying for a refinance to lower their mortgage payments. RefiNow™ has looser requirements around DTI and home equity for homeowners who meet certain low-income thresholds.

Eligible homeowners for the RefiNow™ program must see at least a 0.5% reduction in their interest rate, and their overall mortgage payment must decrease. The RefiNow™ program doesn’t have a minimum credit score requirement, but individual lenders may set their own requirements.

Those who qualify for the RefiNow™ program can not only refinance to a better loan but also receive a $500 credit toward a home appraisal if the appraisal is mandatory.

HFA Preferred™

HFA Preferred™ is an affordable lending product that Fannie Mae issues in conjunction with Housing Finance Agencies (HFAs). These loans feature flexible underwriting requirements such as LTV ratios of up to 97%, borrower income limits set by the HFA, and lower mortgage insurance costs for those at or below 80% area median income.

Mortgage Help Network

If for any reason you’re struggling with your monthly mortgage payment, homeowners with Fannie Mae-owned loans can utilize the Mortgage Help Network.

This program allows homeowners to work with a Department of Housing and Urban Development (HUD)-approved housing counselor. Counselors who are approved by HUD will step in to go over your situation, look at options, and serve as a liaison between you and your mortgage servicer.

If you’re a Rocket Mortgage client who’s having, or may soon be having, payment trouble, you can reach out through the Application for Success.

Tenant-In-Place Rental program

If you’re a tenant in a Fannie Mae-owned property that’s currently being foreclosed upon, you may be able to continue renting at current market rates with the Tenant-in-Place Rental program.

In certain cases, you may be able to keep your current lease. In others, you may be given the option to sign a new lease agreement. Fannie Mae's offers include month-to-month leases and ones for set terms.

FAQ

If you want to dive in deeper and learn more about Fannie Mae and its loans, check out the answers to some frequently asked questions below.

What is a Fannie Mae loan?

Fannie Mae offers several loan products that have more lenient requirements than other mortgages, making it easier for individuals to qualify. These loans, which include HomeReady® and RefiNow™, are available through private lenders.

What is the down payment for a Fannie Mae loan?

For a single-unit primary residence, the down payment can be as low as 3% with the HomeReady® loan, though other types of Fannie Mae programs may require 5% down. When it comes to second homes, the down payment across all eligible Fannie Mae programs must be at least 10%, while an investment property requires at least 15%.

Are Fannie Mae loans assumable?

Fannie Mae loans have a due-on-sale provision that requires the original loan to be paid when ownership of the home transfers from one individual to another. However, in some instances, Fannie Mae loans can be eligible for an assumption. Fannie Mae, along with the mortgage services and insurer, will determine if the loan is eligible for assumption and whether there are any conditions that must be met.

Is Fannie Mae a conventional loan?

Most mortgages backed by Fannie Mae are conventional loans, meaning they’re not insured by the government. To be purchased by Fannie Mae, conventional loans must also be conforming, meaning they conform to the guidelines set by Fannie Mae and the FHFA.

The bottom line: There are many Fannie Mae loan options available

Fannie Mae plays a crucial role in the mortgage market in more ways than one. It helps lenders free up cash to issue more home loans, sets borrowing standards, and makes homeownership more accessible through loan programs like HomeReady® and HomePath®.

Whether you’re a first-time home buyer or a homeowner looking to refinance, Fannie Mae-backed loans offer flexible solutions for different situations. Knowing how this GSE works helps you make more informed decisions about home ownership.

If you’re ready to take the next step, you can explore your options by applying for a loan² with Rocket Mortgage³ today.

¹ Client will receive a 1 point (1.000) loan level price adjustment (LLPA) credit on HomeReady and Home Possible purchase loans locked on or after January 2, 2024. One point (1.000) is equal to 1% of the loan amount. Minimum credit amount will be $2,000. Maximum loan amount is $350,000. Offer is not available with any other discounts or promotions. Offer cannot be retroactively applied to previously closed loans or loans already in process; offer is not transferable. Rocket Mortgage reserves the right to cancel/modify this offer at any time. Additional restrictions/conditions may apply. This is not a commitment to lend.

² Refinancing may increase finance charges over the life of the loan.

³ Rocket Mortgage is a trademark of Rocket Mortgage, LLC or its affiliates.