A conventional mortgage is a home loan originated by a private lender rather than insured or guaranteed by a federal agency, and it typically demands a stronger credit profile than an FHA loan. Understanding where conventional financing fits against government backed alternatives matters more than ever given how underwriting overlays and pricing grids have shifted in recent years.
How Conventional Financing Actually Works
Banks, credit unions and mortgage companies originate conventional loans without a federal guarantee standing behind them. That absence of a backstop is precisely why underwriting tends to run tighter than it does for FHA, VA or USDA products. Some conventional loans do get picked up by Fannie Mae or Freddie Mac, the two government sponsored enterprises that buy loans meeting their criteria and repackage them for the secondary market.
Rates on conventional loans can be fixed or adjustable, and the pricing a borrower receives depends on loan term, loan size, current market conditions and the borrower's own financial profile. Lenders set rates based on inflation expectations and on supply and demand dynamics in the mortgage backed securities market, so two borrowers applying in the same week can see meaningfully different quotes depending on credit score and down payment size.
Fannie Mae's Loan Level Price Adjustments changed in May 2023 in a way worth scrutinizing. Upfront fees rose for borrowers with credit scores of 740 or higher and fell for those below 640, with the down payment amount also factored into the fee calculation. That repricing effectively narrowed the cost gap between strong and weak credit borrowers, a policy choice that drew criticism from some higher credit borrowers who felt they were subsidizing riskier loans. Anyone comparing conventional quotes should pull the current adjustment grid directly from Fannie Mae rather than relying on outdated assumptions about who gets the best pricing.
Conventional Versus FHA: Where the Real Trade-offs Sit
FHA loans exist specifically to widen access for borrowers with thin credit files, past credit problems or limited cash for a down payment. Scores below 580 can still get FHA financing, and required down payments run lower than what conventional lenders typically demand. FHA loans aren't funded by the FHA itself; approved private lenders make the loans under FHA insurance.
Conventional loans generally require a credit score of at least 620 and a cleaner credit history. The trade off is that FHA borrowers pay mortgage insurance premiums that, over the life of the loan, can rival or exceed what a conventional borrower pays in private mortgage insurance, particularly once that borrower builds equity and can drop PMI altogether. That's the piece of the FHA pitch worth questioning: a lower rate or lower entry cost up front doesn't automatically mean lower total cost over 30 years.
| Feature | Conventional Loan | FHA Loan |
|---|---|---|
| Backing | Private lender, sometimes sold to Fannie Mae or Freddie Mac | Insured by the Federal Housing Administration |
| Minimum credit score | Around 620, higher for best pricing | Can go below 580 |
| Down payment | Often 20% for best terms, less accepted with PMI | As low as 3.5% with qualifying credit |
| Mortgage insurance | PMI, cancelable once 20% equity is reached | Mortgage insurance premium, often for the life of the loan |
| Debt to income ceiling | Typically up to 43% | More flexible, higher DTI often permitted |
Conforming, Jumbo, Portfolio and Subprime: Sorting the Subtypes
Conventional and conforming are not interchangeable terms, despite how often they get used that way. A conforming loan is a conventional loan that also meets Fannie Mae and Freddie Mac's dollar limits, set annually by the Federal Housing Finance Agency. That ceiling reached $766,550 in 2024 for most of the continental United States, up from $726,200 in 2023. A jumbo loan of $800,000 is conventional but not conforming, because it exceeds what the GSEs will purchase.
Portfolio loans are conventional mortgages a lender keeps on its own books instead of selling into the secondary market, which can give the lender more flexibility on underwriting since it isn't bound by Fannie or Freddie's rulebook. Subprime conventional loans exist for borrowers whose DTI or credit score falls short of conforming standards. Amortized conventional loans keep the payment level for the full term, while adjustable rate loans hold a fixed rate for an initial period, commonly three to 10 years, before floating annually.
The secondary market for conventional loans is large and liquid, with most loans packaged into pass through mortgage backed securities traded in the to be announced market, and many of those securities further sliced into collateralized mortgage obligations. FHA loans, by contrast, remain a smaller slice of the outstanding mortgage universe: 7.5 million homeowners held FHA insured mortgages at the end of fiscal year 2023.
What Underwriters Actually Ask For
Documentation requirements haven't loosened much since the subprime mortgage collapse of 2007, even as some lenders have automated parts of the review. Applicants should expect to produce proof of income (30 days of pay stubs with year to date totals, two years of federal tax returns, two years of W2s), asset statements covering 60 days or a quarterly cycle across checking, savings and investment accounts, and documentation of any additional income such as bonuses or alimony.
Lenders also verify employment stability and will require gift letters if part of the down payment comes from a relative or friend, specifically to confirm the money isn't a loan requiring repayment. Self employed applicants face heavier scrutiny of business financials. On top of the paperwork, lenders check that the projected mortgage payment stays within roughly 35% of gross income, and they weigh closing costs, origination fees, underwriting fees and broker fees, all of which add to the real cost of borrowing beyond the headline rate.
Pricing the Loan: Rate, Points and the Fed's Fingerprints
A $500,000 home purchase with a $100,000 down payment (20%) and a 650 credit score might land a conventional rate around 5.50%, which works out to roughly $2,271 a month in principal and interest on a 30 year term. That example illustrates the mechanics but shouldn't be read as a current market quote, since actual rates move with Treasury yields, MBS demand and Federal Reserve policy.
When the Federal Reserve raises the federal funds rate, banks' own borrowing costs rise and they pass that through to consumer lending, mortgages included. Points complicate the comparison further: one point costs 1% of the loan amount and typically buys about a 0.25 percentage point reduction in rate. Buyers who expect to stay in a home for a decade or longer generally get more value from paying points than those planning a shorter hold, since it takes time to recoup the upfront cost through lower monthly payments.
Who Actually Clears the Bar
Lenders favor applicants with a credit score of at least 620, though the strongest pricing goes to scores well above that threshold. A debt to income ratio near 36%, and no higher than 43%, strengthens an application considerably. A 20% down payment remains the cleanest path to avoiding private mortgage insurance, though lenders will accept less in exchange for monthly PMI premiums until the borrower reaches 20% equity.
Borrowers with a bankruptcy in the past four years, a foreclosure within seven years, a credit score under 620, a DTI above 43%, or minimal down payment funds will find conventional approval difficult. Anyone declined should request the reasons in writing, since that denial can point toward FHA or another program better suited to a thinner credit file or smaller down payment.
Which Path Actually Costs Less Over Time
The FHA versus conventional decision isn't as simple as comparing headline rates. Borrowers with scores in the high 500s or low 600s often find FHA cheaper up front and sometimes over the full term, while those with strong credit typically come out ahead with conventional financing once PMI cancellation and rate differences are factored in. Given how much the May 2023 fee changes shifted relative costs by credit tier, running both scenarios through a mortgage calculator before committing is the only way to know which structure actually wins for a specific credit score and down payment combination.