What it means
In the United States, two government-sponsored enterprises buy mortgages from lenders, bundle them and sell them to investors. To qualify, loans must follow set rules on size, credit score, deposit and documents.
A loan that meets those rules is called conforming, and one that does not is called non-conforming. The most common reason is size.
The maximum loan amount that qualifies is set each year by a federal agency and varies by area. A loan above it is known as a jumbo loan, which is one kind of non-conforming loan.
Loans can also be non-conforming because of the borrower or the property. Examples include a low credit score, a high debt-to-income ratio (the share of monthly income used to pay debts), limited income documentation or an unusual property.
Lenders treat these loans as riskier than standard ones. Because the usual buyers will not purchase these loans, the lender has to keep them or find private investors.
That raises the lender's cost and risk, and borrowers usually see higher interest rates, larger deposit requirements and stricter checks on reserves. The terms vary widely between lenders.
For a business owner or manager, the practical point is that a non-conforming loan is not necessarily a bad loan. A high-income professional buying an expensive home may have an excellent profile but simply need a larger mortgage.
The label describes how the loan fits the standard rules, not how worthy the borrower is. Outside the United States, similar ideas appear under different labels such as non-standard or specialist lending.
The common thread is lending that sits outside the typical guidelines, with pricing that reflects the extra risk. Borrowers should compare several offers because rates and conditions differ.
In practice
Real-world examples.
Example
A surgeon buys a $1,500,000 home with a $1,000,000 mortgage. The loan exceeds the conforming limit in her area, so she takes a jumbo loan from a private bank. The rate is slightly higher than for a standard loan. She compares offers from three lenders before choosing, because jumbo pricing can differ noticeably between them.
Example
A self-employed carpenter has a credit score below the standard minimum after a difficult year. A specialist lender offers him a non-conforming mortgage with a 25% deposit and a higher rate. He plans to refinance once his record improves. The lender sets out the extra cost in writing so that he can compare it with alternatives.
Example
An investor wants to buy an unusual converted warehouse that does not fit standard property rules. Mainstream lenders decline, but a private lender provides a non-conforming loan. The investor accepts a shorter term to secure the deal. Because the property is unusual, the lender also asks for a larger deposit and an independent valuation.
Formula
Calculation
Amount above conforming limit = loan amount - conforming loan limit
Assume the local conforming limit is $800,000 and a buyer needs a $900,000 mortgage. Amount above the limit = 900,000 - 800,000 = $100,000, so the loan is a jumbo loan and is non-conforming. If the home costs $1,200,000, the loan-to-value ratio is 900,000 / 1,200,000 = 75%.Case study
Seen in the real world.
Ridgeway Savings is a fictional lender that decided to offer non-conforming loans to professionals buying expensive homes. In this illustrative story, it set a minimum 20% deposit, required six months of reserves and charged rates 0.5 percentage points above standard rates. It kept the loans on its own books rather than selling them.
Over three years, the portfolio of $300,000,000 performed well, with arrears below those on the bank's standard loans. The bank's risk team concluded that the borrowers' large deposits and reserves mattered more than the loan's label. However, they limited the exposure to 15% of total lending in case a downturn hit high-value housing.
The experience led Ridgeway to publish a simple guide for brokers explaining who qualifies for its non-conforming loans and what documents are needed. It set out the deposit, reserves and credit standards in plain language, along with examples of typical borrowers. The guide cut the number of unsuitable applications by about a third and shortened the time taken to reach a decision.
Watch out
Common mistakes.
- Equating non-conforming with sub-standard borrowers. Many are strong borrowers who simply need a loan above the standard size limit.
- Assuming the limit is the same everywhere. It is set annually and differs by area.
- Choosing a loan on rate alone. Fees, deposit requirements and terms differ widely.
Questions
People also ask.
What is a jumbo loan?
It is a mortgage above the conforming loan limit and is the most common type of non-conforming loan. Borrowers with strong credit often qualify for them but should expect more detailed checks.
Why do non-conforming loans cost more?
Because the lender cannot easily sell them and must bear the risk itself.
Can a non-conforming loan be refinanced into a conforming one?
Yes, if the borrower's situation changes and the loan then meets the standard guidelines.
From the founder's library
Take it further with the book.
Build your financial confidence beyond this definition. Shihan's full-length guide, Accounting Fundamentals, takes the same plain-English approach and turns it into a complete, practical playbook for non-finance managers, business owners and students - with chapter-end quiz answers and presentation slides included.
25% off with code MMHQ25, applied at checkout. Priced in USD - checkout may show the equivalent in your local currency.
View the book and save 25%