Finance
Principal
The original amount of money borrowed or invested, before interest is added. Loan payments reduce the principal over time, lowering the balance on which interest accrues.
Put it to use
Related calculators
FinanceRetirement / 401(k) Calculator
Project your retirement nest egg from contributions, employer match, and expected returns.
Open calculator →Finance15 vs 30 Year Mortgage CalculatorCompare a 15-year and 30-year mortgage side by side: monthly payment, total interest, and lifetime savings.
Open calculator →FinanceRoth vs Traditional CalculatorCompare Roth and traditional retirement contributions on after-tax value, using your tax rate now versus in retirement.
Open calculator →Keep learning