How Warehouse Lending Works for MLOs
Most MLOs originate loans every day without fully understanding how those loans get funded. The money doesn’t come out of your company’s checking account. It comes from a warehouse line of credit, and that warehouse line is the engine that makes the entire mortgage origination process work. Understanding this system won’t make you a better salesperson, but it will make you a more informed professional who can navigate funding delays, choose better employers, and understand why certain company decisions get made.
What is warehouse lending?
Warehouse lending is a short-term credit facility that mortgage lenders use to fund loans before selling them on the secondary market. Think of it as a revolving credit line specifically designed for mortgage companies.
Here’s the simplified flow:
- You originate a loan and it’s approved
- Your company draws on its warehouse line to fund the loan at closing
- The borrower gets their money, the seller gets paid
- Your company sells the loan to an investor (Fannie Mae, Freddie Mac, Ginnie Mae, or a private investor)
- The investor pays your company, and your company repays the warehouse line
- The warehouse line is available again for the next loan
The entire cycle typically takes 15-30 days from funding to sale. Your company is essentially borrowing money for a few weeks to bridge the gap between closing and selling the loan.
Who are the key players?
| Player | Role | Examples |
|---|---|---|
| Warehouse lender | Provides the credit line | JPMorgan Chase, Western Alliance Bank, Flagstar |
| Mortgage lender (your company) | Originates and funds loans | Any correspondent lender or mortgage banker |
| Investor/aggregator | Buys the funded loan | Fannie Mae, Freddie Mac, private investors |
| MLO (you) | Originates the loan | You |
| Borrower | Gets the mortgage | Your client |
Why should MLOs care about warehouse lending?
You might wonder why any of this matters when your job is originating loans, not funding them. Here’s why:
It explains funding delays
Ever had a loan that was clear to close but took extra days to fund? Warehouse line issues are a common culprit. Your company might be at capacity on its warehouse line, waiting for other loans to be purchased before it can fund new ones. Understanding this helps you explain delays to borrowers without just saying “it’s in processing.”
It affects which companies you should work for
A mortgage company’s warehouse relationships directly impact your ability to close loans. Companies with:
- Multiple warehouse lines: More funding capacity, fewer bottlenecks
- Higher line limits: Can fund more loans simultaneously
- Strong investor relationships: Faster loan sales mean faster line replenishment
Companies with thin warehouse relationships may hit capacity during high-volume months, forcing you to delay closings or turn away business.
It impacts rate locks
When your company locks a rate with a borrower, it usually simultaneously locks or hedges that rate with an investor. If the loan doesn’t close within the lock period, the warehouse line is still committed. This is one reason your company pushes hard to close within lock periods and charges lock extension fees.
How does a warehouse line actually work?
The mechanics are more detailed than the simple flow above:
Advance rates
Warehouse lenders don’t fund 100% of every loan. They typically advance 97-99% of the loan amount. Your company must put up the remaining 1-3% from its own capital. This is called the “haircut.”
For a $400,000 loan with a 98% advance rate:
- Warehouse lender provides: $392,000
- Your company provides: $8,000
- Total funded to borrower: $400,000
Wet vs. dry funding
| Funding Type | When Documents Required | Common In |
|---|---|---|
| Wet funding | After closing (documents follow) | Most states |
| Dry funding | Before closing (documents must be reviewed first) | AZ, CA, ID, NV, OR, WA, AK, HI, NM |
In dry funding states, the warehouse lender reviews loan documents before releasing funds, adding 1-3 days to the closing timeline. If you originate in a dry funding state, build this extra time into your closing schedules.
Dwell time
Dwell time is how long a loan sits on the warehouse line before being sold to an investor. The industry average is 15-20 days. Every day a loan dwells on the line costs your company interest (typically SOFR + a spread). Companies that sell loans quickly are more profitable and have more capacity to fund new loans.
What are the risks?
Warehouse lending isn’t risk-free for anyone involved:
For mortgage companies:
- If loan quality deteriorates, the warehouse lender can reduce the line or require early repurchase
- If investors reject a loan (due to defects, fraud, or market shifts), the company is stuck with it on the warehouse line, accruing interest
- Warehouse line renewals happen annually. If your company’s performance declines, they may lose their line entirely
For MLOs:
- Your company’s financial health directly affects your ability to close loans
- If the warehouse line gets restricted, closing timelines extend and borrowers get frustrated
- In extreme cases, companies that lose warehouse access shut down quickly, leaving MLOs scrambling for new sponsors
The honest caveat: Most MLOs will never directly interact with warehouse lending. Your company’s operations team handles it. But understanding the system helps you ask better questions when evaluating employers and troubleshoot problems when they arise.
How has warehouse lending changed recently?
The warehouse lending landscape shifted significantly after the 2008 financial crisis and continues to evolve:
- Stricter requirements: Warehouse lenders require more capital, better loan quality, and more compliance controls from mortgage companies
- Fewer warehouse lenders: Consolidation has reduced the number of warehouse lenders, making existing relationships more valuable
- Technology integration: Real-time reporting and electronic document delivery have reduced dwell times
- SOFR transition: The shift from LIBOR to SOFR changed warehouse line pricing for the entire industry
- Gestation period requirements: Investors are increasingly requiring loans to meet specific seasoning requirements before purchase
What questions should MLOs ask employers about warehouse lending?
When evaluating a potential employer, these questions reveal financial stability:
- How many warehouse lines do you have? (Multiple lines = more resilience)
- What’s your total warehouse capacity? (Higher capacity = fewer funding bottlenecks)
- Have you ever had a warehouse line reduced or terminated? (Transparency matters)
- What’s your average dwell time? (Under 20 days is good; over 30 is a warning sign)
- Do you fund in-house or use a third-party funder? (In-house typically means more control)
You won’t always get direct answers, but the willingness to discuss these topics tells you something about the company’s culture and confidence in its operations.
How does this connect to your MLO career?
Understanding warehouse lending makes you a more complete mortgage professional. When you’re evaluating where to work, read our guide on how to become an MLO for foundational career decisions. If you’re already licensed and considering your next move, knowing how a company funds its loans tells you a lot about its stability and your future there.
The best MLOs don’t just originate loans. They understand the full lifecycle of a mortgage, from application to securitization. Warehouse lending is the critical middle step that most originators never think about, and that knowledge gap is worth closing.