v3.26.1
Cover
 12 Months Ended
Mar. 31, 2026
shares
Document Information [Line Items]  
Document Type 20-F
Document Registration Statement false
Document Annual Report true
Document Transition Report false
Document Shell Company Report false
Entity File Number 001-41829
Entity Registrant Name PRIMECH HOLDINGS LTD.
Amendment Flag false
Document Period End Date Mar. 31, 2026
Document Fiscal Year Focus 2026
Document Fiscal Period Focus FY
Entity Central Index Key 0001891944
Current Fiscal Year End Date --03-31
Entity Incorporation, State or Country Code U0
Entity Address, Address Line One 60 MacPherson Road
Entity Address, Address Line Two Siemens Centre, #04-08
Entity Address, City or Town Singapore
Entity Address, Country SG
Entity Address, Postal Zip Code 348615
Title of 12(b) Security Ordinary Shares
Trading Symbol PMEC
Security Exchange Name NASDAQ
Entity Common Stock, Shares Outstanding 38,417,987
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 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
Business Contact  
Document Information [Line Items]  
Entity Address, Address Line One 60 MacPherson Road
Entity Address, Address Line Two Siemens Centre, #04-08
Entity Address, City or Town Singapore
Entity Address, Country SG
Entity Address, Postal Zip Code 348615
Contact Personnel Name Mr. Kin Wai Ho
City Area Code +65
Local Phone Number 6286 1868