The Loan Calculator estimates loan payments based on the amount you want to borrow from your TSP account, the current loan interest rate, and other factors. To borrow from your TSP account, you must be a Federal employee in pay status. If you qualify for a TSP loan, the maximum amount you may be eligible to borrow is $50,000; the minimum amount is $1,000. To find out the amount you have available to borrow, visit TSP Loans in the My Account section.