v3.25.2
Document and Entity Information
 12 Months Ended
Mar. 31, 2025
shares
Entity Addresses [Line Items]  
Document Type 20-F
Amendment Flag false
Document Registration Statement false
Document Annual Report true
Document Period End Date Mar. 31, 2025
Current Fiscal Year End Date --03-31
Document Fiscal Year Focus 2025
Document Fiscal Period Focus FY
Document Transition Report false
Document Shell Company Report false
Entity File Number 001-42573
Entity Registrant Name Waton Financial Limited
Entity Central Index Key 0001987363
Entity Incorporation, State or Country Code D8
Entity Address, Address Line One Suites 3605-06, 36th Floor
Entity Address, Address Line Two Tower 6, The Gateway
Entity Address, Address Line Three Harbour City, Tsim Sha Tsui
Entity Address, City or Town Kowloon
Entity Address, Country HK
Title of 12(b) Security Ordinary Shares
Trading Symbol WTF
Security Exchange Name NASDAQ
Entity Common Stock, Shares Outstanding 48,237,472
Entity Well-known Seasoned Issuer No
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Non-accelerated Filer
Entity Emerging Growth Company true
Entity Ex Transition Period false
ICFR Auditor Attestation Flag false
Document Financial Statement Error Correction [Flag] false
Document Accounting Standard U.S. GAAP
Entity Shell Company false
Auditor Firm ID 1195
Auditor Name UHY LLP
Auditor Location Irvine, California
Cogency Global Inc [Member]  
Entity Addresses [Line Items]  
Entity Address, Address Line One 122 East 42nd Street, 18th Floor
Entity Address, City or Town New York
Entity Address, State or Province NY
Contact Personnel Name Cogency Global Inc.
Entity Address, Postal Zip Code 10168
City Area Code 800
Local Phone Number 221-0102