What Makes a Loan Conventional
A conventional loan is a mortgage that is not insured or guaranteed by a federal agency such as the Federal Housing Administration, the Department of Veterans Affairs, or the Department of Agriculture. It is made by a private lender and, most often, later sold to one of the government-sponsored enterprises that purchase conforming loans.
Because no federal agency absorbs the loss if you default, the lender carries more risk. It manages that risk with its own underwriting standards, which combine the enterprises' published guidelines with lender-specific overlays. That is why conventional loan requirements are not identical at every company: the categories are consistent, but the thresholds can differ. Mortgage basics are explained in the CFPB mortgage guide.
Credit Score and Credit History
Credit is the first filter. Lenders pull a credit report and often a tri-merge score from the three nationwide credit reporting companies. The baseline minimum score the enterprises publish for conforming loans sits in the low 600s, and many lenders set their floor at or above that line. A higher score generally widens your options and can improve pricing.
Beyond the score, underwriters read the history:
- Recent late payments, collections, charge-offs, or public records are weighed for how recent they are, how severe they are, and whether they have been resolved.
- Conventional guidelines impose waiting periods after major derogatory events such as bankruptcy, foreclosure, deed in lieu, or short sale. Those waiting periods are measured in years and depend on the event and the size of your down payment.
- Open accounts, account age, and credit mix matter, but a thin file can sometimes be offset by documented on-time rent history reported by your landlord.
The Fair Credit Reporting Act gives you the right to dispute inaccurate information with the credit reporting company and with the business that furnished it, as the FTC summary of the Fair Credit Reporting Act explains. You can request your reports from AnnualCreditReport.com before you apply so errors can be fixed early. If your file is thin, see how to build credit with no credit history.
Debt-to-Income Ratio and How It Is Calculated
The debt-to-income ratio compares your total monthly debt payments with your gross monthly income. Lenders calculate it two ways: a front-end ratio covering only the housing payment, and a back-end ratio covering the housing payment plus all other recurring debt.
A long-standing rule of thumb places the back-end ratio at or below 36 percent, though guidelines often allow more when other parts of the file are strong, such as a large down payment, documented reserves, or a long history of paying housing costs on time.
What the ratio counts:
| Item | How it is treated |
|---|---|
| Housing payment | Principal, interest, property taxes, homeowners insurance, mortgage insurance, and any HOA or condominium dues |
| Installment debt | Auto loans, student loans, personal loans, and other fixed obligations, using the minimum required payment |
| Revolving debt | Credit cards and lines of credit, counted at the minimum payment shown on the statement |
| Court-ordered obligations | Child support and alimony are counted as monthly debts |
| Generally excluded | Utilities, phone plans, groceries, commuting costs, and other living expenses that are not credit obligations |
You can estimate your own figures with the debt-to-income ratio calculator. The ratio uses gross income, before taxes and payroll deductions, and only documented income counts.
Down Payment, Loan Limits, and Reserves
Down payment is the largest lever you control. Some conventional programs are built for buyers with down payments in the single digits, and putting at least 20 percent down usually avoids private mortgage insurance, an added monthly cost that protects the lender rather than you.
Two structural limits also apply:
- Conforming loan limits. The enterprises can purchase only loans up to a maximum amount set annually and varied by county. A loan above the applicable limit is non-conforming, often called a jumbo loan, and is underwritten to a different standard.
- Cash reserves. Lenders may require savings equal to a number of months of the housing payment after closing. Reserves are more likely to be required on larger loans, on investment properties, and when income is hard to document.
Down payment funds must come from an acceptable source and be documented. Gifts from a relative are often allowed on a primary residence, but the lender will ask for a gift letter and evidence of the transfer. See home equity loan requirements for how a second lien is evaluated in a similar way.
Property and Occupancy Requirements
Conventional requirements apply to the property as well as to you. An appraiser establishes the market value that supports the loan amount, unless the lender qualifies for an appraisal waiver. The home must meet condition standards: it should be safe, sound, and structurally intact, with working systems and no conditions that threaten the collateral.
Occupancy and property type change the rules:
- Primary residence. The most favorable terms, with the lowest down payment options and the lightest reserve requirements.
- Second home. Typically requires a larger down payment and reserves, and the property must be a reasonable distance from your primary residence or otherwise suited to personal use.
- Investment property. The strictest pricing and credit terms. Rental income counts only when it is documented on tax returns or supported by an appraisal-based method the lender accepts.
- Condominiums and planned communities. The project itself may have to meet standards covering insurance, ownership concentration, and budget reserves.
HUD homebuying resources cover the property side of the process in more detail.
Documents a Conventional Application Requires
Underwriters verify what you state on the application. A typical conventional file includes:
- Income. Recent pay stubs and, usually, the past two years of federal tax returns or W-2 forms. Self-employed borrowers also provide business returns, profit-and-loss statements, and proof the business exists.
- Assets. Statements for checking, savings, retirement, and brokerage accounts that will supply the down payment, closing costs, and reserves.
- Credit. A written explanation for recent inquiries, new accounts, or derogatory items, sometimes supported by documentation.
- Identity and housing history. Government-issued identification and a record of where you have lived, including landlord contact information if you rent.
- Property documents. A purchase contract, a homeowner's insurance binder, and any condominium or HOA questionnaires the lender requests.
Keep your financial profile steady during underwriting: opening new credit lines, changing jobs, or moving large sums between accounts can trigger extra questions or delays. Ask CFPB answers many process questions, and the general sequence is outlined in how to apply for a home loan.
Disclosures You Should Expect
Once you apply, federal law requires the lender to give you a Loan Estimate summarizing the terms, and later a Closing Disclosure that you can compare against it before signing. Under the Truth in Lending Act and its implementing regulation, the annual percentage rate must be disclosed before you sign, so the cost of credit appears on a consistent basis. The rule text is published as Regulation Z (Truth in Lending).
The APR includes fees that the interest rate alone does not, which is why the two figures differ; rate vs APR on a home loan explains when each is useful. Escrow also affects the monthly amount the lender measures, because property taxes and insurance are often collected monthly and held in an escrow account. The CFPB Owning a Home guide walks through both documents.
Where Applications Commonly Fall Short
Most declines are not mysteries. The recurring problems are a debt-to-income ratio that leaves no room for the new payment, credit events still inside the waiting period, income that cannot be documented, a down payment whose source cannot be traced, and gaps in employment.
If you are not ready yet, the fix is usually patience plus specific steps: pay down revolving balances to lower the minimum payments the lender counts, avoid new credit, correct report errors early, and save in accounts you can document. If your situation points toward government-backed financing instead, compare the rules in VA loan eligibility requirements, which differ in several important ways. This guide is educational and is not financial advice or a loan offer.