Capital Requirements and Warehouse Lending

A lending company’s capital structure includes equity capital (owner investment and retained earnings), warehouse lines of credit (short-term borrowing to fund loans during the origination-to-sale period), and potentially secondary capital (subordinated debt or preferred equity from investors). Minimum capital requirements are set by multiple authorities: state regulators (net worth requirements of $25,000-$1,000,000 by state), GSE approved seller/servicer requirements (Fannie Mae requires $2.5 million minimum net worth and $1 million minimum liquidity for approved seller/servicers), and Ginnie Mae requirements ($2.5 million net worth for issuers). Most startup lenders do not seek direct GSE approval initially—they sell loans through correspondent channels to approved aggregators. A realistic startup capital budget for a mortgage brokerage is $100,000-$200,000; for a correspondent lender $250,000-$500,000; and for a full mortgage banker $1,000,000-$3,000,000 including warehouse line deposits.

Warehouse lines of credit are the short-term financing vehicle that allows mortgage bankers to fund loans before selling them to investors. The mechanics work as follows: the lender draws on the warehouse line to fund a loan at closing, the warehouse lender advances 97-100% of the loan amount, the originating lender holds the loan for 15-45 days while completing post-closing quality checks and investor delivery, and when the investor purchases the loan, the proceeds repay the warehouse line draw. The lender earns the spread between the note rate charged to the borrower and the warehouse line interest rate (typically SOFR + 1.5-3%), plus origination fees. Warehouse line approval requires: audited financial statements, demonstrated origination experience (most warehouse lenders require key personnel with 3-5 years of origination management experience), net worth and liquidity minimums ($500,000-$2,000,000), and a proven quality control program. Major warehouse lenders include Western Alliance Bank, Flagstar Bank, Comerica, and Texas Capital Bank. Warehouse line capacity of $5-$10 million supports monthly funding volume of approximately 15-30 loans.

Liquidity management is critical because lending companies experience significant cash flow timing mismatches. Revenue is earned at closing but may not be collected for 30-60 days (when the loan is sold to the investor and the origination profit is realized). Operating expenses—payroll, rent, technology, compliance—are paid monthly regardless of closing volume. This timing mismatch means a lending company can be profitable on a per-loan basis yet face cash crises during slow months. Best practices include: maintaining 3-6 months of operating expenses in liquid reserves, monitoring daily warehouse line utilization and available capacity, tracking pipeline-to-funding conversion rates (pull-through rate) to project future revenue, and maintaining a revolving credit facility for operating capital separate from warehouse lines. The most dangerous liquidity scenario occurs when interest rates rise rapidly—pipeline loans locked at lower rates lose value (pair-off charges), pull-through rates decline, and refinance volume collapses simultaneously, creating a triple compression of revenue and liquidity.