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Loan Calculator

Calculate payments for an amortized loan, the amount due on a deferred payment loan, or the proceeds of a bond.

$
years
months
%

Annual rate. 0% is allowed.

Monthly pay

$1,110.21

Total of 120 payments
$133,224.60
Total interest
$33,224.60
Loan amount
$100,000.00
Principal vs. interest
  • Principal 75.1%
  • Interest 24.9%
Remaining balance over time
010y100K

Results are estimates and not financial advice.

Amortization schedule

Loan yearInterestPrincipalEnding balance
Year 1$5,795.22$7,527.30$92,472.70
Year 2$5,330.96$7,991.56$84,481.14
Year 3$4,838.09$8,484.43$75,996.71
Year 4$4,314.76$9,007.76$66,988.95
Year 5$3,759.18$9,563.34$57,425.61
Year 6$3,169.33$10,153.19$47,272.42
Year 7$2,543.10$10,779.42$36,493.00
Year 8$1,878.26$11,444.26$25,048.74
Year 9$1,172.41$12,150.11$12,898.63
Year 10$423.02$12,898.63$0.00

About the loan calculator

This calculator covers three common borrowing structures. Pick the tab that matches your loan.

An amortized loan is repaid with equal monthly installments; each one pays the interest due and reduces the principal. A deferred payment loan has no payments until the end: interest compounds, and you repay principal plus all accrued interest in a single lump sum. A bond tab shows how much a bond with a given face value pays out today if it is sold at a discount and redeems at face value at maturity.

Reading the results

For amortized loans you also get a pie chart of principal versus interest, a balance-over-time chart and a yearly or monthly amortization table. The yearly rows add up exactly to the monthly rows, and the final balance is exactly 0.00.

Formula

  • Amortized: M = P × r ÷ (1 − (1 + r)^−n), r = annual rate ÷ 12, n = months
  • Deferred: Amount due = P × (1 + rate ÷ k)^(k × years), k = compounding periods per year
  • Bond: Proceeds = Face value ÷ (1 + rate ÷ k)^(k × years)

Example

Borrowing $100,000 at 6% for 10 years with monthly payments costs $1,110.21 a month ($133,224.60 in total, $33,224.60 of it interest). If the same $100,000 were a deferred loan compounded monthly, you would owe about $181,939.67 after the 10 years.