On March 19, 2026, U.S. federal banking agencies unveiled proposed rules that aim to lower the capital requirements for banks, alter the risk weights for credit exposures, and adjust the capital surcharge for Global Systemically Important Banks (G-SIBs). If implemented, these proposals would mark the most substantial changes to bank capital standards since reforms following the 2008 financial crisis. The proposals encompass over 1,500 pages and cover nearly every aspect of existing regulatory capital requirements. There is a public comment period on these proposals, which ends on June 18, 2026.
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In the aftermath of the 2008-09 financial crisis, extensive reforms were established to raise capital requirements significantly and enhance supervisory controls. This was intended to prevent future taxpayer-funded bailouts and address the excessive risk-taking observed in markets. As a consequence of these reforms, large banks now maintain capital reserves that are over double their pre-crisis levels, contributing approximately $1 trillion in additional loss-absorbing capacity over the past twenty years.
A core element of the post-crisis capital framework is Basel III, an international regulatory agreement that dictates the capital banks must retain based on their risks. The largest U.S. institutions, classified as G-SIBs, incur an additional capital requirement known as the G-SIB surcharge, calibrated to reflect their systemic impact.
The current proposals, led by Federal Reserve Vice Chair for Supervision Michelle Bowman, seek to finalize remaining Basel elements while streamlining the capital framework and reducing regulatory complexities. There are three main components of the proposals:
1. The Basel III proposal aims to replace the existing "dual stack" approach, which requires large banks to calculate capital using two methodologies and adopt the higher figure. The new framework would enforce a single "expanded risk-based" ratio, featuring standardized methods for credit, operational, and market risk. Alone, this aspect could yield a moderate 1.4 percent capital increase for certain banks.
2. The updated G-SIB surcharge proposal proposes to adjust the fixed coefficients for calculating the surcharge to reflect inflation and economic growth, potentially reducing capital requirements for eight G-SIB banks by 3.8 percent.
3. A revamped "standardized approach" would alter how smaller banks determine risk-based capital. The removal of the requirement to deduct mortgage-servicing assets from capital calculations could encourage more lending and servicing by banks of all sizes.
Overall, factoring in additional changes already proposed for annual stress testing, the 2026 proposals may lead to a reduction in Common Equity Tier 1 capital by an estimated 4.8 percent for larger banks, 5.2 percent for midsize institutions, and 7.8 percent for smaller banks. Despite these reductions, the largest U.S. banks would still hold more than $800 billion in capital—approximately twice the levels seen before the financial crisis.
The effects of the 2026 proposals will differ across banking organizations and asset classes. They could free up billions in capital for banks, potentially enhancing lending, share buybacks, dividends, and strategic investments, although the impact will vary by institution. Borrowers might benefit from increased credit availability, especially in the mortgage market, where banks have lost market share to nonbank lenders, as well as in commercial and consumer lending.