v3.26.1
Cover - shares
 3 Months Ended
Jun. 30, 2026
Aug. 17, 2026
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Amendment Flag false  
Document Period End Date Jun. 30, 2026  
Document Fiscal Year Focus 2027  
Document Fiscal Period Focus Q1  
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, City or Town Singapore  
Entity Address, Country SG  
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 $0.005 per share  
Trading Symbol TOP  
Security Exchange Name NASDAQ  
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  
Entity Shell Company false  
Class A Ordinary Shares    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   121,705,513
Class B Ordinary Shares    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   2,000,000