Cover Page
Jul. 07, 2022
Cover [Abstract]  
Document Type 8-K
Document Period End Date Jul. 07, 2022
Entity Registrant Name Upstart Holdings, Inc.
Entity Incorporation, State or Country Code DE
Entity File Number 001-39797
Entity Tax Identification Number 46-4332431
Entity Address, Address Line One 2950 S. Delaware Street
Entity Address, Address Line Two Suite 300
Entity Address, City or Town San Mateo
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94403
City Area Code 650
Local Phone Number 204-1000
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, par value $0.0001 per share
Trading Symbol UPST
Security Exchange Name NASDAQ
Entity Emerging Growth Company false
Entity Ex Transition Period false
Entity Central Index Key 0001647639
Amendment Flag false