Access Business Credit Act of 2023 or the ABC Act of 2023 This bill excludes from the gross income of certain banks, for income tax purposes, interest received on small business loans of up to $5 million. The exclusion does not apply to interest received after 2027. The bill applies to loans that are (1) secured by land situated in the United States that is used or held by the small business in connection with the active conduct of a farming business, or (2) incurred in the ordinary course of the trade or business of the small business. To be eligible for the exclusion, a bank must have less than $50 billion in assets at the close of the preceding taxable year.