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Shareholder Report
 6 Months Ended
Dec. 31, 2024
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name SHORT TERM INVESTMENT FUND FOR PUERTO RICO RESIDENTS, INC.
Entity Central Index Key 0001847310
Entity Investment Company Type N-1A
Document Period End Date Dec. 31, 2024
Short Term Investment Fund for Puerto Rico Residents, Inc. - Class A  
Shareholder Report [Line Items]  
Fund Name Short Term Investment Fund for Puerto Rico Residents, Inc.
Class Name Class A
Trading Symbol PRALX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Short Term Investment Fund for Puerto Rico Residents, Inc. (the “Fund”) for the period from July 1, 2024, to December 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at
www.ubs.com/prfunds
. You can also request this information by contacting us at
787-250-3600.
Additional Information Phone Number 787-250-3600
Additional Information Website www.ubs.com/prfunds
Expenses [Text Block]
What were the Fund costs for last six months?
Annual Fund Operating Expenses
(based on a hypothetical $10,000 investment)
 
  
Class
Name
  
Cost of a $10,000
investment
  
Costs paid as a
percentage of a $10,000
investment
 
  
Class A
   $51   1.00%
Expenses Paid, Amount $ 51
Expense Ratio, Percent 1.00%
Net Assets $ 60,493,352
Holdings Count | Holding 10
Advisory Fees Paid, Amount $ 162,520
Investment Company, Portfolio Turnover 0.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
 
   
 
 
 
Total Net Assets
      $60,493,352  
# of Portfolio Holdings
      10  
Portfolio Turnover Rate
      0.00%  
Total Advisory Fees Paid
      $162,520  
Holdings [Text Block]
Top 5 Holdings (% of Net Assets)
       
Federal Home Loan Bank Discount Note, 0.00%, due 01/02/25
     66.12%  
Federal Home Loan Bank Discount Note, 0.00%, due 01/02/25
     13.6%   
Federal Home Loan Bank Discount Note, 0.00%, due 01/02/25
     3.3%   
Federal Home Loan Bank Discount Note, 0.00%, due 01/02/25
     3.3%   
Federal Home Loan Bank Discount Note, 0.00%, due 01/03/25
     3.3%   
Fund Holdings Summaries
The Fund’s portfolio consists 100% of
high
-quality, liquid, short-term U.S.
agency
discount notes.
The following table shows the ratings of the Fund’s portfolio securities as of December 31, 2024. The ratings used are the highest rating given by one of the three nationally recognized rating agencies, Fitch Ratings (Fitch), Moody’s Investors Service (Moody’s), and S&P Global Ratings (S&P). Ratings are subject to change.
 
 Rating  
 (% of Total Portfolio)
   
  
   
    
AAA
    100.00%