| Document and Entity Information | Jun. 21, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jun. 21, 2022 |
| Entity Registrant Name | FINWISE BANCORP |
| Entity Incorporation, State or Country Code | UT |
| Entity File Number | 001-40721 |
| Entity Tax Identification Number | 83-0356689 |
| Entity Address, Address Line One | 756 East Winchester St. |
| Entity Address, Address Line Two | Suite 100 |
| Entity Address, City or Town | Murray |
| Entity Address, State or Province | UT |
| Entity Address, Postal Zip Code | 84107 |
| City Area Code | 801 |
| Local Phone Number | 501-7200 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity Central Index Key | 0001856365 |
| Title of 12(b) Security | Common Stock, par value $0.001 per share |
| Trading Symbol | FINW |
| Security Exchange Name | NASDAQ |
