The Thrift Savings Plan loan calculator is an invaluable resource for those considering a loan from their TSP account. Before borrowing, input the desired loan amount and repayment term to view estimated payments. This information helps assess whether a loan is feasible within your current budget. Understanding the long-term effects of TSP loans on your retirement savings is essential, as borrowing reduces your principal balance and may impact growth potential. Using the Thrift Savings Plan loan calculator provides the clarity needed to make a well-informed decision.