| Feature | Conforming Loans | Non-Conforming Loans |
| Definition | Mortgages that meet Fannie Mae and Freddie Mac guidelines for size, income, and credit standards. | Mortgages that don’t meet GSE guidelines, usually due to high loan amounts or flexible underwriting rules. |
| Backed / Purchased By | Fannie Mae or Freddie Mac (Government-Sponsored Enterprises) | Private investors, wholesale lenders, or portfolio lenders |
| Loan Limit (2025) | ≤ $806,500 (standard areas) ≤ $1,209,750 (high-cost areas per FHFA) | > $806,500 (standard) > $1,209,750 (high-cost) |
| Loan Purpose | Primary residences, second homes, or limited investment properties | Luxury, investment, or unconventional properties; borrowers with non-traditional income |
| Credit Score Requirement | Typically ≥ 620 | Typically ≥ 680–700, may vary by program |
| Down Payment Minimum | As low as 3% (for first-time buyers) | Usually 10–30%, depending on loan type and risk |
| Debt-to-Income Ratio (DTI) | ≤ 45–50% | Flexible — may exceed 50% for Non-QM or DSCR loans |
| Documentation Required | Standard: W-2s, paystubs, tax returns | Flexible: Bank statements, assets, DSCR ratio, foreign income |
| Interest Rate Range | Lower — standardized by GSE pricing | Slightly higher — based on lender risk and investor pricing |
| Loan Size Range | Up to conforming limits (≤ $806,500) | Can exceed $1M–$5M+ |
| Mortgage Insurance (PMI) | Required if <20% down, can be removed after 20% equity | Usually not required, but offset by higher down payment or rate |
| Property Types Allowed | 1–4 unit primary or second homes | Luxury, investment, foreign-owned, or mixed-use properties |
| Underwriting Standards | Strict, automated (DU/LP engines) | Flexible or manual underwriting, lender discretion |
| Appraisal Requirements | Standard single appraisal | Often two appraisals for high-value or unique properties |
| Funding Source | GSEs or lenders selling to Fannie/Freddie | Private lenders or portfolio investors |
| Market Risk | Lower (GSE-backed) | Higher (held by lender or investor) |
| Ideal Borrower | - Salaried/W-2 employees - First-time or moderate-income buyers - Borrowers within conforming limits | - High-net-worth or self-employed borrowers - Investors or foreign nationals - Borrowers with alternative income or large assets |
| Loan Flexibility | Moderate — follows fixed GSE rules | High — customized loan terms available |
| Typical Loan Amount | $200,000–$800,000 range | $800,000–$5,000,000+ (depending on market) |
| Approval Speed | Fast, automated approvals | May take longer — case-by-case underwriting |
| Rate Locks | Standardized rate locks (30–60 days) | Negotiated or market-adjusted rate locks |
| Resale / Securitization | Easily sold on secondary market (Fannie/Freddie MBS) | Retained or sold privately (non-agency MBS) |
| Refinance Options | Easy refinance through GSE programs (Rate/Term, Cash-Out) | Possible, but depends on private lender policies |
| Regulatory Oversight | Subject to CFPB, QM, and ATR rules | Also regulated but allows Non-QM flexibility (alternative ATR proof) |
| Lender Risk | Low — risk transferred to Fannie/Freddie | Higher — lender or investor assumes risk |
| Typical Borrower Goal | Affordable, standardized mortgage | Flexible financing or high-value property purchase |
