How conforming and nonconforming conventional mortgages work, including down payment, mortgage insurance, and underwriting.
What makes a loan conventional
A conventional mortgage is not insured or guaranteed by a federal housing agency. Lenders generally underwrite it to investor or portfolio standards, which can create broad options but also make pricing and eligibility sensitive to credit, equity, property type, and documentation.
Conforming versus nonconforming
Conforming loans meet applicable secondary-market requirements, while nonconforming loans fall outside one or more of those parameters. Jumbo loans are a familiar nonconforming category, but portfolio loans can also be nonconforming for other reasons.
Down payment and PMI
Low-down-payment conventional options may be available, but private mortgage insurance can apply when the lender’s required equity threshold is not met. PMI cost varies by risk profile and can affect both monthly payment and qualification.
Credit and debt review
Underwriting typically reviews stable income, assets, liabilities, credit history, occupancy, property condition, and source of funds. A strong file is not defined by one number; it is the combined risk picture.
When conventional financing may fit
Conventional financing can be useful for buyers seeking flexible property types, competitive pricing, or eventual PMI cancellation, but the best fit depends on a complete program comparison.
Questions to ask before acting
- What assumptions could materially change the result?
- How much cash will remain after closing?
- What happens if taxes, insurance, repairs, or income change?
- Which terms should be confirmed in writing?
Bottom line
Use this guide as a framework for better questions and more complete comparisons. Actual eligibility, pricing, legal rights, and transaction requirements depend on the borrower, property, lender, program, contract, and location.