Student Loan Calculator Formula
The Student Loan Calculator formula calculates estimate student loan repayments for US federal, UK Plan 2 and Plan 5, Canadian, and Australian HECS-HELP schemes.
This formula is used because it connects the main inputs directly to the result people need.
It keeps the work clear, so you can change one value and see how the answer moves.
Student loan repayment works in two very different ways. US federal loans amortise like a mortgage, so a fixed monthly payment clears the balance over a set term. UK, Canadian and Australian schemes are income-contingent: you repay a percentage of income above a threshold, the balance can grow, and any remainder is eventually written off.