Glossary · Credit unions

Member business loan (MBL)

Also called: MBL, member business lending, credit union business loan

Defined by the Research desk, The Lender Report · Sources reviewed

A credit union's business-purpose loan to one of its own members. The total of these loans is capped by federal law; loans to non-members are counted separately.

Federal law defines a member business loan as a loan, line of credit or letter of credit whose proceeds go to a commercial, corporate, business investment property, venture or agricultural purpose. Several things are left out: credit fully secured by a 1- to 4-family dwelling, credit fully secured by shares or deposits, credit fully backed by a federal or state agency, and a borrower whose business credit at the credit union totals less than $50,000.

NCUA’s rule uses a wider term, commercial loan, for underwriting, and keeps member business loan for the cap. The two differ at the edges. A loan to a non-member, or an interest in another lender’s loan bought as a non-member participation, is a commercial loan but not a member business loan.

Two points matter to a borrower. You join the credit union before it lends to you. And a credit union near its cap may have little room for a new loan however strong the file is, so ask early how much room it has. An SBA guaranteed loan helps here, because the portion the agency backs is taken out of the net balance.

How it shows up in the data here

The 5300 fields on this site report commercial loans, not member business loans as the cap defines them. Each credit union row shows commercial loans made in the first half of 2026 (granted or purchased) and loans outstanding; see credit union commercial loans made. Non-member loans and participations held are a separate figure. The net member business loan balance used for the cap is not carried here.

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Related terms

Sources

  1. 12 U.S.C. 1757a, Limitation on member business loans, retrieved .
  2. 12 CFR 723.8, Aggregate member business loan limit; exclusions and exceptions, retrieved .
  3. 12 CFR 723.2, Definitions (commercial loan, associated borrower), retrieved .

Plain definitions for orientation, not legal, tax or credit advice. A lender's own policy decides what it will do.