v3.26.1
Cover - USD ($)
12 Months Ended
Mar. 31, 2026
Jul. 06, 2026
Sep. 30, 2025
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Amendment Flag false    
Document Period End Date Mar. 31, 2026    
Document Fiscal Year Focus 2026    
Document Fiscal Period Focus FY    
Entity Registrant Name TOP Financial Group Limited    
Entity Central Index Key 0001848275    
Entity File Number 001-41407    
Entity Tax Identification Number 00-0000000    
Entity Incorporation, State or Country Code E9    
Current Fiscal Year End Date --03-31    
Entity Address, Address Line One 101 Cecil Street    
Entity Address, Address Line Two #13-05 Tong Eng Building    
Entity Address, Country SG    
Entity Address, City or Town Singapore    
Entity Address, Postal Zip Code 069533    
City Area Code +65    
Local Phone Number 6252 8998    
Title of 12(b) Security Class A Ordinary Shares, par value $0.001 per share    
Trading Symbol TOP    
Security Exchange Name NASDAQ    
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 Small Business true    
Entity Emerging Growth Company true    
Entity Ex Transition Period false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 9,240,000
Class A Ordinary Shares      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   33,553,455  
Class B Ordinary Shares      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   10,000,000