v3.25.1
Shareholder Report
 6 Months Ended
Mar. 31, 2025
USD ($)
$ / shares
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Build Funds Trust
Entity Central Index Key 0001875710
Entity Investment Company Type N-1A
Document Period End Date Mar. 31, 2025
Build Bond Innovation ETF  
Shareholder Report [Line Items]  
Fund Name Build Bond Innovation ETF
Class Name Build Bond Innovation ETF
Trading Symbol BFIX
Security Exchange Name NYSE
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Build Bond Innovation ETF (the “Fund”) for the period of  October 1, 2024, to March 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://getbuilding.com/etfs/bfix/. You can also request this information by contacting us at 1-833-852-8453.
Additional Information Phone Number 1-833-852-8453
Additional Information Website https://getbuilding.com/etfs/bfix/
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
Build Bond Innovation ETF
$23
0.45%
[1]
Expenses Paid, Amount $ 23
Expense Ratio, Percent 0.45%
Updated Performance Information Location [Text Block]
Visit https://getbuilding.com/etfs/bfix/ for more recent performance information.
Net Assets $ 7,491,493
Holdings Count | $ / shares 110
Investment Company Portfolio Turnover 235.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of March 31, 2025)
Net Assets
$7,491,493
Number of Holdings
110
Portfolio Turnover
235%
30-Day SEC Yield
4.04%
Holdings [Text Block]
Top 10 Holdings
(% of net assets)
U.S. Treasury Note/Bond 3.88%, 03/31/2027
8.5%
U.S. Treasury Note/Bond 4.13%, 02/28/2027
8.3%
U.S. Treasury Note/Bond 4.13%, 01/31/2027
4.7%
U.S. Treasury Note/Bond 4.25%, 11/30/2026
3.6%
U.S. Treasury Note/Bond 5.00%, 08/31/2025
3.5%
U.S. Treasury Note/Bond 1.25%, 05/15/2050
2.8%
U.S. Treasury Note/Bond 0.25%, 05/31/2025
2.7%
Marriott International, Inc. 5.75%, 05/01/2025
2.1%
U.S. Treasury Note/Bond 4.25%, 12/31/2026
2.0%
EOG Resources, Inc. 3.15%, 04/01/2025
2.0%
Top Sectors
(% of net assets)
Public Administration
38.2%
Manufacturing
14.0%
Finance and Insurance
13.9%
Mining, Quarrying, and Oil and Gas Extraction
5.4%
Retail Trade
4.8%
Information
4.1%
Accommodation and Food Services
3.9%
Real Estate and Rental and Leasing
3.1%
Professional, Scientific, and Technical Services
2.6%
Cash & Other
10.0%
Updated Prospectus Web Address https://getbuilding.com/etfs/bfix/
[1]
* Annualized