First Hawaiian Bank Routing Number - Hawaii

Banking before statehood: Hawaii

First Hawaiian Bank was founded on August 17, 1858, as Bishop & Company by Charles Reed Bishop and William A. Aldrich. At the time, Hawaii was an independent kingdom ruled by Kamehameha IV. The bank predates Hawaii's overthrow as a monarchy (1893), its annexation by the United States (1898), its establishment as a US territory (1900), and its admission as the 50th state (1959). When First Hawaiian Bank opened its doors, the American Civil War was still three years away.

Bishop & Company became the First National Bank of Hawaii in 1933 and eventually First Hawaiian Bank in 1969. Today it is the largest bank in Hawaii with over $24 billion in assets and more than 50 branches across Oahu, Maui, the Big Island, Kauai, Lanai, and Guam. Its routing number, 121301015, is one of the most recognized numbers in Hawaiian commerce.

From Bishop & Company to BNP Paribas and back to independence

First Hawaiian Bank's ownership history reflects the push and pull of global capital on island economies. In 1998, French banking giant BNP Paribas acquired a controlling stake in First Hawaiian, making a 140-year-old Hawaiian institution a subsidiary of the largest bank in France. For two decades, First Hawaiian operated with the financial backing (and strategic constraints) of a European parent.

BNP Paribas began divesting its stake in 2016 through a series of public offerings, and by 2019, First Hawaiian was once again fully independent and publicly traded on the NASDAQ under the ticker FHB. The return to independence was welcomed by the local business community, who saw it as a restoration of Hawaiian self-determination in a banking sector increasingly dominated by mainland and international institutions.

Using a Hawaii routing number from the mainland

First Hawaiian Bank's routing number 121301015 works for ACH transfers and direct deposits from any US bank, but customers on the mainland should be aware of processing time differences. Because Hawaii is in the Hawaii-Aleutian time zone (UTC-10), ACH cutoff times at First Hawaiian may differ from mainland banks by several hours. A same-day ACH transfer initiated from a New York bank at 3:00 PM ET may not meet First Hawaiian's processing window for the same business day.

Military families stationed on the mainland who maintain First Hawaiian accounts - a common scenario given Hawaii's large military presence - regularly use routing number 121301015 for cross-Pacific direct deposits and transfers. The routing number processes through the Federal Reserve Bank of San Francisco, the same Fed district that handles all Hawaiian banking, which helps keep settlement times consistent despite the geographic distance.

Pacific banking: First Hawaiian

Banking in Hawaii presents logistical challenges that mainland banks never face. Physical cash must be shipped by armored transport on inter-island flights. Check processing involves scanning documents in branches spread across six inhabited islands and transmitting them to a centralized operations center on Oahu. Even routine ATM servicing requires air travel. These realities make Hawaiian banking more expensive to operate than its mainland equivalent, which partly explains why Hawaii historically has higher bank fees and fewer competing institutions.

First Hawaiian has adapted to this geography by investing heavily in digital banking - its mobile app and online platform handle the vast majority of routine transactions, reducing the dependency on physical branch visits. The bank also maintains a branch in Guam, extending routing number 121301015's reach into the Western Pacific and serving the significant population of Hawaiian transplants and military personnel stationed on the island.

No branch required, no matter which ocean you

First Hawaiian Bank is a remarkable institution, 166 years old, deeply woven into the fabric of island life, and genuinely irreplaceable for personal banking in Hawaii. But businesses operating on the mainland, or companies with teams spread across the continent, need banking infrastructure that isn't anchored to a single archipelago. Slash provides a fully digital business banking platform accessible from any location, with corporate cards, spend management, and accounting integrations that work whether your team is in Honolulu, Houston, or anywhere in between.

For businesses with Hawaiian roots looking to scale nationally, Slash offers the modern financial infrastructure to match your ambition, without asking you to close the First Hawaiian account you've had since your grandparents opened it.