v3.26.1
Cover
 12 Months Ended
Dec. 31, 2025
shares
Entity Addresses [Line Items]  
Document Type 20-F
Document Registration Statement false
Document Annual Report true
Document Period End Date Dec. 31, 2025
Current Fiscal Year End Date --12-31
Document Transition Report false
Document Shell Company Report false
Entity File Number 001-42027
Entity Registrant Name mF International Limited
Entity Address, Address Line One 2308, 23/F, The Center
Entity Address, Address Line Two 99 Queen’s Road Central
Entity Address, City or Town Central
Entity Address, Country HK
Title of 12(b) Security Class A Ordinary Shares
Trading Symbol MFI
Security Exchange Name NASDAQ
Entity Common Stock, Shares Outstanding (in shares) 49,045,623
Entity Well-known Seasoned Issuer No
Entity Voluntary Filers No
Entity Current Reporting Status No
Entity Interactive Data Current No
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
Amendment Flag false
Document Fiscal Period Focus FY
Document Fiscal Year Focus 2025
Entity Central Index Key 0001940941
Entity Incorporation, State or Country Code K3
Entity Address, Postal Zip Code 00000
Business Contact [Member]  
Entity Addresses [Line Items]  
Entity Address, Address Line One 2308, 23/F, The Center
Entity Address, Address Line Two 99 Queen’s Road Central
Entity Address, City or Town Central
Entity Address, Country HK
Contact Personnel Name Dawei Yuan
City Area Code +852
Local Phone Number 5619 0241
Contact Personnel Email Address david@mfint.co
Entity Incorporation, State or Country Code K3
Entity Address, Postal Zip Code 00000