Cover	12 Months Ended
	Jun. 30, 2025 shares
Document Information [Line Items]
Document Type	20-F
Document Registration Statement	false
Document Annual Report	true
Document Transition Report	false
Document Financial Statement Error Correction [Flag]	false
Document Shell Company Report	false
Entity Interactive Data Current	Yes
Document Accounting Standard	U.S. GAAP
ICFR Auditor Attestation Flag	false
Amendment Flag	false
Document Period End Date	Jun. 30, 2025
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	FY
Entity Information [Line Items]
Entity Registrant Name	Galaxy Payroll Group Limited
Entity Central Index Key	0001905920
Entity File Number	001-42269
Entity Incorporation, State or Country Code	D8
Current Fiscal Year End Date	--06-30
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	Yes
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Contact Personnel [Line Items]
Entity Address, Address Line One	25th Floor
Entity Address, Address Line Two	Ovest
Entity Address, Address Line Three	77 Wing Lok Street
Entity Address, City or Town	Sheung Wan
Entity Address, Country	HK
Entity Address, Postal Zip Code	000000
Entity Listings [Line Items]
Title of 12(b) Security	Class A and Class B Ordinary Shares, par value US$0.00625 per share
Trading Symbol	GLXG
Security Exchange Name	NASDAQ
Class A Ordinary Shares
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding	1,441,265
Class B Ordinary Shares
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding	360,000
Business Contact [Member]
Entity Contact Personnel [Line Items]
Contact Personnel Name	Puglisi & Associates
Entity Address, Address Line One	850 Library Avenue
Entity Address, Address Line Two	Suite 204
Entity Address, City or Town	Newark
Entity Address, State or Province	DE
Entity Address, Postal Zip Code	19711
Entity Phone Fax Numbers [Line Items]
City Area Code	302
Local Phone Number	738-6680