v3.25.4
Form N-1A Cover
Jan. 28, 2026
Prospectus [Line Items]  
Document Type 485BPOS
Amendment Flag false
Registrant Name Capitol Series Trust
Entity Central Index Key 0001587551
Document Creation Date Jan. 28, 2026
Document Effective Date Jan. 28, 2026
Entity Investment Company Type N-1A
Document Period End Date Sep. 30, 2025
Prospectus Date Jan. 28, 2026