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Cover
 12 Months Ended
Sep. 30, 2025
Document Information [Line Items]  
Document Type F-1
Amendment Flag false
Entity Registrant Name RICH SPARKLE HOLDINGS LIMITED
Entity Central Index Key 0002031688
Entity Incorporation, State or Country Code D8
Entity Emerging Growth Company true
Entity Ex Transition Period false
Entity Address, Address Line One Portion 2, 12th Floor
Entity Address, Address Line Two The Center
Entity Address, Address Line Three 99 Queen’s Road Central
Entity Address, Country HK
City Area Code +852
Local Phone Number 3152 1600
Entity Address, Postal Zip Code 00000
Entity Address, City or Town Hong Kong
Business Contact  
Document Information [Line Items]  
Contact Personnel Name Cogency Global Inc.
Entity Address, Address Line One 122 East 42nd Street
Entity Address, Address Line Two 18th Floor
City Area Code 800
Local Phone Number 221-0102
Entity Address, Postal Zip Code 10168
Entity Address, City or Town New York
Entity Address, State or Province NY