Block is not asking Washington to turn Cash App into an FDIC-insured lender. Its Builders Bank application is for a narrower institution: an uninsured national trust bank that would custody digital assets, execute client trades and move stablecoins, while taking neither deposits nor making loans.
That distinction is the useful answer for investors following Block’s September 8 announcement. A federal charter could simplify supervision of crypto-custody activities and open an institutional service line, but it would not transform the company’s funding model or give it a conventional bank balance sheet. Approval also remains pending.
Block shares ended Friday at $79.21, about 1.1% below their September 8 close, according to daily market data. That muted reaction is consistent with an option on future revenue rather than an immediate earnings event.
What Builders Bank would be allowed to do
The public charter application, dated September 4, describes Builders Bank & Trust, N.A. as a wholly owned Block subsidiary based in Sioux Falls, South Dakota. It would operate nationally over a three-year de novo period and provide four principal services:
- fiduciary custody and safekeeping of bitcoin and other digital assets;
- customer buy and sell orders executed on a riskless-principal basis;
- customer-directed deposits, withdrawals and transfers of digital assets; and
- stablecoin settlement and transfer services.
“Deposits” in that third item means digital assets moving into custody, not insured customer cash deposits. Block’s announcement says the proposed bank would not take deposits or make loans. The application says it will not seek Federal Deposit Insurance Corporation coverage and, as an uninsured non-depository trust bank, would not be subject to the Community Reinvestment Act.
Block intends to fund the bank itself and says the unit does not plan to borrow during the de novo period. The amount of capital, detailed forecasts and much of the business plan are in confidential exhibits, so investors cannot yet calculate a return on the proposed investment.
The crypto opportunity is real, but still small in Block’s profit mix
The filing supplies scale that Block had not put at the center of the announcement. Cash App Bitcoin and Square Bitcoin facilitated about $10.7 billion of transaction volume in 2025, while Cash App served roughly two million monthly digital-asset transacting accounts in the second quarter of 2026. Block currently runs the activity under more than 50 state money-transmitter and virtual-currency licenses. The charter would consolidate existing bitcoin custody under a federal trust-bank framework; it would not necessarily eliminate state licensing for Block’s other activities.
The near-term profit contribution is modest. Block’s second-quarter shareholder letter reported $72 million of Bitcoin Ecosystem gross profit, down 31% year over year. That was only 2.3% of Block’s $3.166 billion total gross profit, based on the company’s figures. Cash App and Square, not crypto custody, still carry the earnings case.
The counterargument is strategic. A federal fiduciary framework may make institutions more willing to use Block for custody and settlement, and the regulatory path is no longer theoretical. The Office of the Comptroller of the Currency conditionally approved five national trust-bank applications in December 2025, including digital-asset specialists, while stressing that each application receives an individual review.
For XYZ shareholders, the next decision points are an OCC conditional approval, disclosure of the capital commitment and evidence that institutional custody or stablecoin settlement lifts Bitcoin Ecosystem gross profit. Until then, Builders Bank is a potentially valuable regulatory rail—not a new deposit franchise and not yet a material earnings engine.