A USDA home loan is a zero down payment mortgage for eligible rural and suburban homebuyers. USDA loans are issued through the USDA loan program, also known as the USDA Rural Development Guaranteed Housing Loan Program, by the United States Department of Agriculture.In 2017, as a part of its Rural Development program, the USDA helped some 127,000 families buy and upgrade their homes. The program is designed to “improve the economy and quality of life in rural America.” It offers low interest rates and no down payments, and you may be surprised to find just how accessible it is.» Learn how to improve your credit scoreWith all types of mortgage loans to choose from, how do you know whether a USDA loan is right for you? Here’s an overview of how it works and who qualifies: Loan guarantees: The USDA guarantees a mortgage issued by a participating local lender — similar to an FHA loan and VA-backed loans — allowing you to get low mortgage interest rates, even without a down payment. If you put little or no money down, you will have to pay a mortgage insurance premium, though.Direct loans: Issued by the USDA, these mortgages are for low- and very low-income applicants. Income thresholds vary by region. With subsidies, interest rates can be as low as 1%.Home improvement loans and grants: These loans or outright financial awards permit homeowners to repair or upgrade their homes. Packages can also combine a loan and a grant, providing up to $27,500 in assistance.Qualifying for a USDA-backed mortgage guaranteeIncome limits to qualify for a home loan guarantee vary by location and depend on household size. To find the loan guarantee income limit for the county where you live, consult this USDA map and table. USDA guaranteed home loans can fund only owner-occupied primary residences. Other eligibility requirements include:•U.S. citizenship (or permanent residency)•A monthly payment — including principal, interest, insurance and taxes — that’s 29% or less of your monthly income. Other monthly debt payments you make cannot exceed 41% of your income. However, the USDA will consider higher debt ratios if you have a credit score above 680.•Dependable income, typically for a minimum of 24 months•An acceptable credit history, with no accounts converted to collections within the last 12 months, among other criteria. If you can prove that your credit was affected by circumstances that were temporary or outside of your control, including a medical emergency, you may still qualify.•Applicants with credit scores of 640 or higher receive streamlined processing. Below that, you must meet more stringent underwriting standards. You can also qualify with a nontraditional credit history.Applicants with credit scores of 640 or higher receive streamlined processing. Those with scores below that must meet more stringent underwriting standards. And those without a credit score, or a limited credit history, can qualify with “nontraditional” credit references, such as rental and utility payment histories.» MORE: Get preapproved for your USDA home loanHow USDA-issued home loans workGoing one step further in helping prospective home-buyers, the USDA issues mortgages to applicants deemed to have the greatest need. That means an individual or family that:•Is without “decent, safe and sanitary housing”•Is unable to secure a home loan from traditional sources•Has an adjusted income at or below the low-income limit for the area where they liveThe USDA usually issues direct loans for homes of 2,000 square feet or less, with a market value below the area loan limit. Again, that’s a moving target depending on where you live. Home loans can be as high as $500,000 or more in pricey real estate markets like California and Hawaii, and as low as just over $100,000 in parts of rural America.