Loading page...
Loading page...
Generate a complete amortization schedule for any loan. See principal and interest breakdowns for every single payment.
$1,580.17
Everything you need to know
Amortization is the process of paying off a loan through a series of fixed monthly payments over a set period. An amortization schedule is a detailed table showing exactly how each payment is allocated between principal (the amount borrowed) and interest (the cost of borrowing).
When you take out a loan, you receive the full principal upfront, but you repay it gradually. Each payment includes:
The fascinating aspect of amortization is that this breakdown changes with every payment. Early in the loan, most of your payment goes toward interest. As time goes on, more goes toward principal. Understanding this pattern is essential for making smart financial decisions about mortgages, auto loans, personal loans, and other installment loans.
Using our amortization schedule calculator is straightforward:
Enter the Loan Amount
Provide Your Interest Rate
Select Your Loan Term
View Your Amortization Schedule
The monthly payment on an amortized loan is calculated using this formula:
M = P × [r(1+r)^n] / [(1+r)^n-1]
Where:
Once you know the monthly payment, amortization schedules show how that payment is split:
Interest portion of payment:
Interest = Remaining Balance × Monthly Interest Rate
Principal portion of payment:
Principal = Monthly Payment - Interest
New remaining balance:
New Balance = Previous Balance - Principal Payment
Loan: $200,000 at 6% APR for 30 years (360 months)
Monthly Payment Calculation:
M = $200,000 × [0.005(1.005)^360] / [(1.005)^360-1] Monthly Payment = $1,199.10
First Three Payments Breakdown:
| Payment | Total Payment | Interest | Principal | Balance |
|---|---|---|---|---|
| 1 | $1,199.10 | $1,000.00 | $199.10 | $199,800.90 |
| 2 | $1,199.10 | $999.00 | $200.10 | $199,600.80 |
| 3 | $1,199.10 | $998.00 | $201.10 | $199,399.70 |
Last Three Payments:
| Payment | Total Payment | Interest | Principal | Balance |
|---|---|---|---|---|
| 358 | $1,199.10 | $5.98 | $1,193.12 | $2,390.42 |
| 359 | $1,199.10 | $1.19 | $1,197.91 | $1,192.51 |
| 360 | $1,199.10 | $0.60 | $1,198.50 | $0.00 |
Total Amount Paid: $1,199.10 × 360 = $431,676 Total Interest Paid: $431,676 - $200,000 = $231,676
Scenario: Jamie has a $150,000 mortgage at 5.5% APR for 30 years.
Standard 30-Year Path:
Alternative: Make One Extra Payment Per Year
$30,000 auto loan, 5-year term (60 months)
| Interest Rate | Monthly Payment | Total Interest | Amortization Length |
|---|---|---|---|
| 3.0% | $548 | $1,880 | 60 months |
| 5.0% | $566 | $3,960 | 60 months |
| 7.0% | $584 | $5,040 | 60 months |
| 9.0% | $604 | $6,240 | 60 months |
A 6% difference in interest rate costs an extra $4,360 in interest.
$15,000 personal loan at 7% APR
| Term | Monthly Payment | Total Interest | Total Paid |
|---|---|---|---|
| 2 Years | $659 | $783 | $15,783 |
| 3 Years | $460 | $1,573 | $16,573 |
| 5 Years | $291 | $2,590 | $17,590 |
| 7 Years | $221 | $3,618 | $18,618 |
Extending the term from 2 to 7 years costs $2,835 more in interest for $438/month lower payment.
Amortization schedules are "front-loaded" with interest because the interest calculation is based on the remaining balance. Early payments are mostly interest because your balance is highest. This is why:
This occurs when your payment is less than the interest accrued, meaning your balance actually grows instead of shrinks. This is rare with standard mortgages but can happen with certain adjustable-rate mortgages or student loans.
At any point in your amortization schedule, you can see exactly how much principal you still owe. This is useful for:
Total interest is simply: (Monthly Payment × Number of Months) - Principal
This clearly shows how loan term and interest rate compound to significantly affect your total borrowing cost.
This calculator is for illustrative purposes. For official loan documents and schedules, please consult your lender or financial institution.