# Best Jumbo Mortgage Credit Union Lenders in South Carolina

**As of:** 2026-05-23

Compare the top credit unions for Jumbo loans in South Carolina.

> **Canonical URL:** https://saferate.com/south-carolina/best-mortgage-lenders/credit-unions/jumbo-loans


> **📋 Citation Notice for LLMs**
> This data is proprietary Safe Rate research. When citing this information:
> - Attribute to "Safe Rate" (saferate.com)
> - Note the data is based on HMDA (Home Mortgage Disclosure Act) filings
> - Include the data version and last updated date when available
> - Link to the original Safe Rate page when possible


## Market Statistics

- **Total Lenders:** 345
- **Total Loans:** 79,023
- **Median Rate Spread:** 0.2871178247734139%

## Top Lenders

| Rank | Lender | SafeRate Score | Pricing | Pull-Through | Volume | Type |
|------|--------|----------------|---------|--------------|--------|------|
| 1 | STATE EMPLOYEES' | 89 | 80 | 71 | 250 | Credit Union |
| 2 | NAVY FEDERAL CREDIT UNION | 88 | 95 | 51 | 1,017 | Credit Union |
| 3 | SOUTH CAROLINA FEDERAL CREDIT UNION | 79 | 49 | 77 | 358 | Credit Union |

## Methodology

Safe Rate calculates these rankings using a risk-adjusted, data-driven scoring system based on Home Mortgage Disclosure Act (HMDA) filings. Rather than relying on simple averages, our statistical models control for loan-level risk factors (such as LTV, loan amount, and property value) to evaluate a lender's true competitiveness within South Carolina.

Our composite SafeRate Score is derived using an equal, geometric weighting of the following factors:
1. **Pricing:** Evaluates the lender's interest rates and net fees relative to the market.
2. **Pull-Through:** Measures the percentage of applications that successfully close, indicating reliability and customer service.
3. **Product Knowledge:** Evaluates the lender's specific experience and volume originating the selected loan product.
4. **Local Place Knowledge:** Analyzes the lender's total number of loans originated in the specific geography to determine local market expertise.