A conventional loan is any home mortgage that isn't insured or guaranteed by a federal agency like the FHA, VA, or USDA. Instead, these loans are backed by private lenders and, in many cases, sold to Fannie Mae or Freddie Mac, the government-sponsored enterprises that set the underwriting standards most conventional lenders follow. Because conventional loans make up the largest share of mortgages issued in the United States, understanding how they work is a useful starting point for almost anyone comparing financing options.
How Conventional Loans Work
Conventional loans come in two main categories: conforming and non-conforming. A conforming loan meets Fannie Mae and Freddie Mac's guidelines, including a loan amount that falls under the annually adjusted conforming loan limit for the borrower's county. Loans above that threshold are considered jumbo loans, which carry their own underwriting rules and are covered separately in this guide's article on jumbo loan financing.
Conventional loans are typically offered as fixed-rate mortgages, where the interest rate stays the same for the life of the loan, or as adjustable-rate mortgages (ARMs), where the rate can change after an initial period. The tradeoffs between these structures are explored in depth in Fixed-Rate vs. Adjustable-Rate Mortgages Compared.
Down Payment Requirements
One common misconception is that conventional loans always require 20% down. In practice, many conventional loan programs allow down payments as low as 3% to 5% for qualified borrowers, particularly first-time buyers. Putting down less than 20%, however, generally triggers a requirement for private mortgage insurance (PMI), which protects the lender if the borrower defaults. PMI costs and removal rules are covered in detail in Private Mortgage Insurance (PMI): A Full Guide. For a full comparison of minimum down payments across loan types, see Down Payment Requirements by Loan Type.
Credit Score and Income Requirements
Conventional loans generally have stricter credit requirements than government-backed programs like FHA loans. Many lenders look for a minimum credit score in the mid-600s to low-700s, though the exact threshold varies by lender, loan program, and other compensating factors such as a larger down payment or lower debt-to-income (DTI) ratio. Lenders typically calculate DTI by comparing total monthly debt payments, including the proposed mortgage payment, to gross monthly income, and most conventional programs look for a DTI at or below the mid-40% range, though this can vary.
Documentation commonly required includes recent pay stubs, W-2s or tax returns, bank statements, and employment verification. Self-employed borrowers often need additional documentation, such as two years of business tax returns, to verify stable income.
Conventional vs. FHA and VA Loans
Compared to FHA loans, which are insured by the Federal Housing Administration and often more forgiving of lower credit scores, conventional loans typically reward stronger credit profiles with lower rates and, once enough equity is built, the ability to remove mortgage insurance altogether. FHA loans, by contrast, often carry mortgage insurance premiums for the life of the loan unless refinanced. Details on FHA eligibility and costs appear in FHA Loans: A Complete Guide for First-Time Buyers.
VA loans, available to eligible veterans, service members, and some surviving spouses, often allow financing with no down payment at all and no ongoing mortgage insurance, though they include a one-time funding fee in most cases. See VA Loans: Benefits and Eligibility for Veterans for specifics. Because eligibility rules for VA and FHA loans are set by federal agencies, borrowers considering those options should confirm current requirements directly with the VA, HUD, or a licensed lender.
Interest Rates on Conventional Loans
Conventional mortgage rates are influenced by broader economic conditions, the borrower's credit profile, the loan-to-value ratio, the loan term, and whether the rate is fixed or adjustable. Rates for well-qualified borrowers with strong credit and a substantial down payment are often competitive with, or lower than, government-backed loan rates, though this relationship can shift depending on market conditions. Because rates change frequently, it's generally more useful to compare quotes from multiple lenders at the time of application than to rely on any single published rate.
Loan Terms
Conventional loans are commonly offered in 15-year and 30-year fixed terms, though 10-year, 20-year, and other terms are sometimes available. A 30-year term generally produces a lower monthly payment but more interest paid over the life of the loan, while a 15-year term usually means a higher payment but significantly less total interest and faster equity buildup. Running the numbers through a mortgage payment calculator or an amortization schedule calculator can help illustrate how term length affects both monthly costs and long-term interest.
Who Conventional Loans Tend to Suit
Conventional loans are often a good fit for borrowers with solid credit, stable income, and at least a modest down payment saved. Because underwriting standards are set by Fannie Mae and Freddie Mac rather than a single government agency, guidelines can vary somewhat between lenders, so shopping around and comparing loan estimates is a common recommendation. Anyone unsure whether they should buy at all versus continuing to rent may find it useful to work through a rent vs. buy calculator before committing to a purchase and mortgage application.