Every FHA-approved lender has a compare ratio. Most check it once a quarter, nod if it's below 150, and move on. That's a mistake. The compare ratio is not a report card—it's HUD's primary screening tool for identifying lenders whose loan performance deviates from their peers. Understanding what it measures, how it's constructed, and what triggers downstream consequences is foundational to managing FHA risk.
How the Compare Ratio Is Calculated
The FHA compare ratio measures a lender's default and claim rate relative to the aggregate default and claim rate in the same geographic areas where the lender originated loans. HUD publishes this through the FHA Neighborhood Watch Early Warning System .
The formula is straightforward. HUD calculates each lender's default rate—the percentage of the lender's FHA-insured loans that are 90+ days delinquent, in foreclosure, or have resulted in a claim. It then calculates the aggregate default rate for all FHA lenders operating in the same Metropolitan Statistical Areas (MSAs) or counties. The compare ratio is the lender's rate divided by the area rate, multiplied by 100.
Compare Ratio = (Lender Default Rate ÷ Area Default Rate) × 100
A compare ratio of 100 means the lender's performance exactly matches the area average. Below 100 means the lender is outperforming. Above 100 means it is underperforming relative to peers in the same geography.
The geographic normalization is what makes the compare ratio useful and what makes it dangerous to ignore. It controls for local economic conditions—a lender in a high-unemployment MSA isn't penalized for area-wide defaults. What the ratio isolates is whether the lender's own underwriting, processing, and quality control are producing worse outcomes than their geographic peers.
Risk Tiers: What the Numbers Mean
Not all elevated compare ratios carry the same consequences. The industry generally recognizes four tiers, though HUD does not publish formal thresholds for all enforcement actions.
The lender's default rate is below the area average. This is the target operating zone. It does not mean zero risk—a lender can have a low compare ratio and still have individual loan-level defects—but it means the portfolio is performing better than peers.
Performance is worse than the area average but not dramatically so. Most lenders in this zone are not under active HUD scrutiny, but they should be investigating. A compare ratio of 130 means your default rate is 30% higher than your geographic peers—that warrants root-cause analysis.
This is where HUD's attention sharpens. Lenders with compare ratios in this range are significantly underperforming their geographic peers. HUD has historically used 150 as an informal threshold for deeper review. Lenders here should expect that their origination and servicing practices will be examined if performance doesn't improve.
A compare ratio above 200 means the lender's default rate is more than double the area average. This is the zone where HUD Credit Watch termination letters, indemnification demands, and withdrawal of FHA approval become real possibilities. Lenders in this tier need immediate remediation.
What Triggers HUD Scrutiny
HUD's Mortgagee Review Board uses the compare ratio as one input, not the only input, for enforcement decisions. However, certain patterns reliably attract attention:
- Sustained elevation. A compare ratio that has been above 150 for multiple quarters signals a systemic problem, not a one-time anomaly.
- Rapid deterioration. A ratio that jumps from 110 to 180 in a single quarter will draw more scrutiny than a stable 140, because it suggests a change in underwriting practice or market strategy.
- High early-payment defaults (EPDs). Loans that default within the first few payments are a strong signal of origination defects. High EPDs combined with an elevated compare ratio is a combination that almost always triggers review.
- Concentration in specific geographies or products. A lender whose elevated ratio is driven by performance in a single MSA or a specific product type (e.g., streamline refis) gives HUD a clear thread to pull.
Indemnification Risk
The most consequential outcome of a high compare ratio isn't a letter—it's indemnification. When HUD determines that a lender originated a loan with material defects, it can require the lender to indemnify HUD against future losses on that loan. This means the lender absorbs the loss if the borrower defaults, even though FHA insured the loan.
Indemnification demands have increased in recent years as HUD has invested in data-driven targeting. The compare ratio is the first filter in that process. Lenders with elevated ratios are more likely to have their individual loans selected for post-endorsement technical review (PETR), and loans that fail PETR are candidates for indemnification.
The financial impact is significant. A single indemnified loan that goes to claim can cost a lender $50,000 to $150,000 or more, depending on the loan amount and loss severity. A pattern of indemnifications can threaten a lender's FHA approval entirely.
How Lenders Should Interpret Their Ratio
The compare ratio is a lagging indicator. By the time it moves, the loans that caused the movement were originated 12 to 24 months ago. This is both its weakness and its value—it tells you about the cumulative effect of past decisions, which means it reveals systemic issues rather than one-off errors.
Smart lenders don't just watch their own ratio. They track the distribution of ratios across the industry to understand where they sit relative to the pack. When 15% of all FHA lenders have compare ratios above 150, the problem is partly environmental. When only 5% are above 150 and you're one of them, the problem is likely internal.
The most important question a lender can ask about their compare ratio is not “is it above 150?” It's “is it moving in the wrong direction, and do I know why?” A ratio of 120 that has risen from 90 over three quarters is more actionable than a stable 145. The trend reveals whether current origination practices are producing better or worse outcomes, regardless of the absolute number.