v3.25.4
Shareholder Report
12 Months Ended
Dec. 31, 2025
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSR
Amendment Flag false
Registrant Name Capitol Series Trust
Entity Central Index Key 0001587551
Entity Investment Company Type N-1A
Document Period End Date Dec. 31, 2025
Shareholder Report Annual or Semi-Annual Annual Shareholder Report
C000258312  
Shareholder Report [Line Items]  
Fund Name Sterling Capital Enhanced Core Bond ETF
Trading Symbol SCEC
Security Exchange Name CboeBZX
Expenses [Text Block]

What were the Fund’s costs for the period since inception?

(based on a hypothetical $10,000 investment)

The expenses reflect the period of March 13, 2025 (commencement of operations) to December 31, 2025. Such expenses would be higher for the full reporting period.

Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Sterling Capital Enhanced Core Bond ETF
$24
0.29%Footnote Reference*
FootnoteDescription
Footnote*
Annualized
Expenses Paid, Amount $ 24
Expense Ratio, Percent 0.29% [1]
Performance Past Does Not Indicate Future [Text] The Fund's past performance is not a good predictor of how the Fund will perform in the future.
Performance Inception Date Mar. 13, 2025
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.
AssetsNet $ 487,885,459
Holdings Count | Holding 284
Advisory Fees Paid, Amount $ 1,264,021
InvestmentCompanyPortfolioTurnover 67.00%
Additional Fund Statistics [Text Block]

Fund Statistics 

Net Assets
$487,885,459
Number of Portfolio Holdings
284
Advisory Fee
$1,264,021
Portfolio Turnover
67%
Holdings [Text Block]

Asset Weighting (% of total investments) 

Group By Sector Chart
Value
Value
Asset Backed Securities
29.8%
Corporate Bonds
29.9%
Preferred Stocks
0.2%
U.S. Government & Agencies
28.3%
U.S. Treasury Bonds & Notes
11.8%
Material Fund Change [Text Block]

Material Fund Changes

At a meeting held on October 23, 2025, the Board of Trustees (the “Board”) of Capitol Series Trust (the “Trust”) approved a proposed Agreement and Plan of Reorganization (the “Reorganization”) of the Fund into a fund of the same name, a newly created series of Sterling Capital Funds (the “Acquiring Fund”), whereby the Acquiring Fund will acquire the assets and assume the liabilities of the Fund. The proposed Reorganization is subject to shareholder approval and certain other conditions. Sterling Capital Management LLC (“Sterling Capital”), the investment adviser of the Fund, will serve as the adviser of the Acquiring Fund following the Reorganization.

The Acquiring Fund will have the same investment objective and substantially similar principal investment strategies and principal risks as the Fund. The same portfolio managers of the Fund, who are employees of Sterling Capital, will continue to be responsible for the day-to-day management of the Acquiring Fund. Sterling Capital will continue to handle the trading of portfolio securities for the Acquiring Fund. The management fee and expense ratio of the Acquiring Fund are expected to be the same as those of the Fund.

The proposed Reorganization will occur by transferring all of the assets and liabilities of the Fund to the Acquiring Fund in exchange for shares of the Acquiring Fund. As a result, shareholders of the Fund will become shareholders of the Acquiring Fund and will receive shares of the Acquiring Fund with a value equal to the aggregate net asset value of their shares of the Fund held immediately prior to the Reorganization. The proposed Reorganization is expected to be a tax-free transaction for federal income tax purposes. 

The Board of the Trust has determined that the Reorganization is in the best interests of the Fund and its shareholders, and that the interests of the Fund’s shareholders will not be diluted as a result of the Reorganization. 

[1] Annualized