The Allowance for Credit Losses (ACL) is the balance-sheet reserve a bank maintains against expected loan losses — calculated under the CECL (Current Expected Credit Loss) standard (FASB ASC 326), which replaced the older ALLL incurred-loss model beginning 2020–2023.
The ACL represents management's estimate of credit losses expected to be realized over the contractual life of a bank's loan portfolio, measured on a current-expected basis — not just when losses are incurred. FASB's ASC 326 (https://www.fasb.org/standards/accounting-standards-updates/2016-13-financial-instruments-credit-losses-measurement-topic-326) established the Current Expected Credit Loss (CECL) model, which replaced the Allowance for Loan and Lease Losses (ALLL) incurred-loss model. CECL adoption was required for SEC filers in 2020 and for most smaller institutions by 2023. Under CECL, banks must estimate expected credit losses from day one of originating a loan — not wait until a loss is probable. This forward-looking model uses historical loss rates, current economic conditions, and reasonable forecasts of future conditions to estimate lifetime expected losses. The practical effect: CECL reserves are typically larger than ALLL reserves, especially during economic downturns, because they capture all expected losses rather than only those deemed probable under current conditions. The FDIC tracks ACL/ALLL ratios in its Quarterly Banking Profile (https://www.fdic.gov/analysis/quarterly-banking-profile/). Call report Schedule RC-C (https://www.ffiec.gov/npw/) provides institution-level data on loan balances and related allowances. Examiners scrutinize ACL adequacy during safety-and-soundness exams — under-reserved banks may be required to increase provisions, which reduces capital and profits. Provision expense (the P&L charge to build the ACL) is an important metric for business borrowers evaluating bank health. A bank with rapidly rising provision expense is anticipating more losses — often a signal of tightening credit standards ahead.
CECL (Current Expected Credit Loss) is the FASB accounting standard (ASC 326) requiring banks to reserve for expected lifetime loan losses on day one of origination rather than waiting for a probable loss event. It generally requires larger reserves, which reduces bank capital and can incentivize tighter credit standards — particularly for higher-risk loan categories. CECL was a major regulatory change; larger banks adopted it in 2020, smaller banks by 2023.
The ACL (Allowance for Credit Losses) under FASB ASC 326 (CECL) replaced the ALLL (Allowance for Loan and Lease Losses) under the old incurred-loss model. The key difference: ALLL recognized losses only when probable and estimable; ACL requires forward-looking estimation of expected losses over the full contractual life of each loan from the time of origination.
The ACL is funded through provision expense, which reduces pre-tax earnings. Banks with very high ACL ratios (heavily provisioned portfolios) may have less capital available to originate new loans. Conversely, a bank releasing ACL reserves (reducing provisions as losses improve) gains capital that can support additional lending. Monitoring provision trends at your primary bank can signal whether they're tightening or loosening credit.