Loan Calculator

The Four Numbers Behind Every Loan

Every fixed-rate loan comes down to four parts: the principal, the interest rate, the term, and the monthly payment. The principal is the amount you borrow. The interest rate is the yearly cost of borrowing, shown as a percentage. The term is how long you take to pay it back. The monthly payment is what the first three add up to when spread evenly across the loan.

Borrowers use a loan calculator before signing anything so there are no surprises. A car buyer checks whether a five-year term fits the budget. A homeowner compares a 15-year and a 30-year mortgage. A family weighs a personal loan against saving up. Seeing the real monthly figure and the total interest turns a vague "can we afford it" into a clear yes or no.

How the Monthly Payment Is Worked Out

The payment comes from the amortization formula. In words: take the principal, multiply it by the monthly interest rate, then multiply that by one plus the monthly rate raised to the number of payments. Divide the whole thing by one plus the monthly rate raised to the number of payments, minus one. The monthly rate is the yearly rate divided by 12, and the number of payments is the term in years times 12.

Worked example. Borrow 20,000 at 7.5 percent for five years. The monthly rate is 0.075 divided by 12, about 0.00625. The number of payments is 60. Run those through the formula and the monthly payment lands near 400.76. Across 60 months you repay about 24,046, so the interest you pay is roughly 4,046 on top of the amount borrowed.

How the Loan Shrinks Over Time

Amortization means each payment covers some interest and some principal. Early on, most of the payment is interest because the balance is large. As the balance drops, more of each payment chips away at the principal. The table below shows the shape of that first example loan.

This is why paying a little extra early saves more interest than paying extra late. Early payments hit a bigger balance, so they cut future interest harder.

Rate Versus APR, and What the Estimate Leaves Out

The interest rate is the pure cost of the money. The APR, or annual percentage rate, folds in certain fees, so it is usually a touch higher and gives a fairer basis for comparing lenders. This calculator uses the plain rate you enter, so if you want a like-for-like comparison, enter the APR each lender quotes.

The estimate also leaves out things a real loan may add: origination fees, insurance, property tax on a mortgage, or a late charge. Treat the result as the core principal-and-interest cost, then ask your lender for the full breakdown before you commit.

Common Mistakes and Smart Tips

• Entering a monthly rate as a yearly one. Always use the yearly rate; the tool converts it to monthly for you.
• Chasing the lowest payment. A longer term drops the monthly figure but raises total interest. Check both numbers, not just one.
• Forgetting fees. A low rate with heavy fees can cost more than a slightly higher rate with none.
• Tip. Try the same loan at a shorter term. The monthly payment rises, but the interest you save is often large enough to be worth the stretch.

To turn the interest figure into a share of the loan, our percentage calculator shows what portion of your total goes to the lender. If you are comparing several offers, the average calculator gives you the mean monthly payment across them at a glance.

People Also Ask

What is the difference between EMI and monthly payment?

They are the same thing. EMI stands for equated monthly installment, the fixed amount you pay each month. The calculator's monthly payment figure is your EMI.

Does a longer loan term save money?

It lowers each monthly payment but raises the total interest, because you borrow the money for longer. A shorter term costs more per month yet less overall.

How does the interest rate change my payment?

A higher rate raises both the monthly payment and the total interest. Even one percentage point on a large loan can add thousands over the full term, so shopping rates pays off.

Can I pay off a loan early?

Usually yes, and doing so cuts the interest you still owe. Check for a prepayment penalty first, since a few loans charge a fee for paying ahead.

What is amortization?

It is the schedule that spreads your loan and interest into equal monthly payments. Early payments lean toward interest and later ones toward principal, though the total stays the same each month.

Is APR the same as the interest rate?

No. The interest rate is just the cost of borrowing. APR adds certain fees, so it is a better single number for comparing loans from different lenders.

How much loan can I afford?

A common guide keeps total debt payments under about 36 percent of your gross monthly income. Enter different amounts here and check the monthly payment against that limit.