The income test is not what it is usually reported to be. Guaranteed-loan eligibility at 7 CFR 3555.151(a) says only that "the household's adjusted income must not exceed the applicable moderate income limit," and the definition of moderate income at 7 CFR 3555.10 is a greater-of test with three limbs: 115 percent of the United States median family income, the average of the statewide and state non-metro median family income, or 115/80ths of the area low-income limit adjusted for household size for the county or metropolitan area where the property sits. The widely repeated shorthand, that the limit is 115 percent of the area median income, is not what the regulation says and can be materially wrong in a low-income county, where the third limb or the national figure may set a higher ceiling than local incomes would. The published limits for a specific county are on the Rural Development site, and they are what to check.
Household income, not borrower income. The regulation treats these as two different numbers, and confusing them is the commonest reason an application fails after the borrower was told they qualified. Repayment income is what the parties to the promissory note are expected to receive, and it is used to judge whether the loan can be repaid. Annual income under 7 CFR 3555.152(b) is "the income of all household members, regardless of whether they will be parties to the promissory note." An adult relative living in the home who will not be on the loan still counts toward the eligibility ceiling.
Two fees, and the regulation's name for one of them is the name people attach to the other. 7 CFR 3555.107(g) requires "a nonrefundable up-front guarantee fee," which "will not exceed 3.5 percent of the principal obligation." Subsection (h) then authorizes a separate "annual fee," which may "not exceed 0.5 percent of the average annual scheduled unpaid principal balance of the loan for the life of the loan." Both may be passed on to the borrower. Those are the regulatory ceilings; the rates actually charged are set by Rural Development notice, have been well below the ceilings, and change, so the current figures come from Rural Development rather than from any summary. The point to carry away is structural: a no-down-payment USDA guaranteed loan costs an up-front charge plus an ongoing one, and the ongoing one does not end when the balance falls, unlike private mortgage insurance on a conventional loan.
Payment assistance is the direct program's real benefit, and it is a loan against the future. Under 7 CFR 3550.68, payment assistance can reduce a borrower's effective cost substantially, and the regulation caps it: "payment assistance may not exceed the amount necessary if the loan were amortized at an interest rate of one percent." The same section states the condition most borrowers underweight, that "payment subsidies are subject to recapture when the borrower transfers title or ceases to occupy the property." The subsidy is not forgiven by the passage of time. It accumulates as an amount owed back on sale, which changes what a later sale actually nets and is worth understanding before the first payment rather than at closing on the way out.