Loan Calculator
Calculate payments and interest for different types of loans, including amortized loans, deferred payment loans, and bonds. Understand loan structures and view detailed repayment schedules.
Loan Calculator
Types of Loans
Amortized Loan
Amortized loans are paid off in equal installments over time. Each payment consists of both principal and interest, with earlier payments having a higher proportion of interest and later payments having more principal.
$$\text{月供} = P \times \frac{r(1+r)^n}{(1+r)^n-1}$$
- P = Principal loan amount
- r = Monthly interest rate (annual rate divided by 12)
- n = Number of payments (term in years multiplied by 12)
Deferred Payment Loan
In a deferred payment loan, the borrower pays a single lump sum at maturity that includes both the principal and accumulated interest. Interest compounds over the loan term.
$$\text{到期应付金额} = P(1+r)^n$$
Bond
A bond is a fixed-income security that represents a loan made by an investor to a borrower. The borrower (usually a company or government) pays a predetermined amount (face value) at maturity.
How to Use the Loan Calculator
- Select the type of loan you want to calculate: Amortized Loan, Deferred Payment, or Bond.
- Enter the loan amount, term in years (and months if applicable), and annual interest rate.
- Choose how often interest is compounded (monthly or annually) and, for amortized loans, select the payment frequency.
- Click the Calculate button to view your results, including payment amounts, interest costs, and amortization schedules.
Tips for Getting the Best Loan Terms
Maintain Good Credit
A higher credit score often leads to lower interest rates. Check your credit report for errors and take steps to improve your score before applying for a loan.
Make a Larger Down Payment
If possible, make a larger down payment. This reduces the loan amount, resulting in lower interest costs over the life of the loan.
Compare Multiple Loan Offers
Don't accept the first loan you're offered. Shop around with different lenders to find the best interest rates and terms.
Read the Fine Print
Understand all fees, penalties, and terms associated with the loan. Look for prepayment penalties or other hidden costs.
Loan Calculator Examples
Comparing an Amortized Loan Payment
A borrower wants to estimate the payment and total interest on a $120,000 loan repaid over 10 years at 5.5% annual interest.
Inputs: Loan type = amortized, amount = $120,000, term = 10 years, interest rate = 5.5%, payment frequency = monthly.
What the result shows: The calculator shows the recurring payment, the amortization schedule, and how the balance declines as principal replaces interest over time.
This helps compare whether the monthly payment fits your budget before you commit to a term.
Estimating the Cost of a Deferred Payment Loan
A business owner wants to see how much a deferred balance could grow when nothing is repaid until maturity.
Inputs: Loan type = deferred payment, amount = chosen principal, term = selected years, interest rate = annual rate, compounding = monthly or annually.
What the result shows: The calculator estimates the amount due at maturity and the total interest that accrues over the full holding period.
This is useful for understanding the tradeoff between delayed repayment flexibility and a larger final payoff.
Frequently Asked Questions
What is the difference between simple and compound interest?
Simple interest is calculated only on the principal amount, while compound interest is calculated on both the principal and accumulated interest. Most loans use compound interest.
How can I pay off my loan faster?
You can pay off your loan faster by making extra payments toward the principal, making biweekly instead of monthly payments, or refinancing to a shorter term with a lower interest rate.
What factors affect my loan interest rate?
Factors that affect your interest rate include your credit score, debt-to-income ratio, loan amount, loan term, type of loan, and current market rates.
Is it better to get a longer or shorter loan term?
A shorter loan term typically means higher monthly payments but less interest paid overall. A longer term means lower monthly payments but more interest over the life of the loan. Choose based on your budget and financial goals.