Regions Financial Corp. disclosed in an Aug. 8 regulatory filing that the bank plans to test a new accounting method in 2019.

The bank said it has developed a plan to run a parallel production for the current expected credit loss accounting standard, or CECL, during 2019, though it would not adopt the standard until the first quarter of 2020.

The company also said it would expect greater reserves under the new standard for "longer-dated loans such as residential first mortgages, home equity lending products and indirect-other products." However, the bank said it expected no material change for its held-to-maturity securities or its available-for-sale securities.

Banks will need to adopt CECL by the 2020 first quarter. The new accounting standard requires banks set aside reserves for expected losses across the life of a loan as opposed to reserving only when a loss is probable.