Amortization Calculator

This amortization calculator shows your full loan payment schedule with principal and interest breakdown. Enter loan details to see every payment instantly.

Amortization Calculator | Loan Payment Schedule
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Loan Details
%
years

Amortization schedules show how each payment is split between principal and interest over the life of the loan.

Loan Summary
💰 Monthly Payment: —
Loan Amount (Principal)—
Annual Interest Rate—
Loan Term—
Payment Frequency—
Payment Amount—
Total Number of Payments—
Total of All Payments—
Total Interest Paid—
Interest as % of Total—
Payoff Date—
First Payment Interest—
First Payment Principal—
Amortization Schedule
#DatePaymentPrincipalInterestBalance

Enter loan details to view schedule.

Shows each payment split between principal and interest over the life of the loan.

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Creator & Reviewer

Hasnain Khan

Co-Founder, Techraxy

Hasnain Khan is a digital tools developer and Co-Founder of Techraxy, a platform dedicated to building modern web-based calculators and utility tools. He focuses on tool optimization, website performance, and creating accessible user experiences across categories like automotive, finance, construction, and everyday utilities.

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Introduction to Amortization Calculator

Amortization is the process of paying off a loan through regular scheduled payments over time. Each payment consists of two parts: principal (the amount borrowed) and interest (the cost of borrowing). Early in the loan, most of your payment goes toward interest. As the loan progresses, more goes toward principal. This Amortization Calculator helps you see exactly how your loan pays down over time. Enter your loan amount, interest rate, and term. The calculator shows your monthly payment and a complete amortization schedule with principal and interest breakdowns for each period. Toolraxy built this calculator to help borrowers understand their loans, track payoff progress, and evaluate the impact of extra payments.

How to Use This Amortization Calculator

              1. Enter your Loan Amount (principal borrowed)

              2. Enter the Annual Interest Rate (loan rate)

              3. Select your Loan Term (years or months)

              4. Enter the Start Date (optional – for payment schedule)

              5. Add any Extra Monthly Payment (optional)

              6. Add any One-Time Extra Payment (optional)

              7. Click Calculate to see your amortization schedule

              8. Review monthly payments and principal/interest breakdowns

Formula Section

Monthly payment formula:

Monthly Payment = P × [ r(1+r)^n ] / [ (1+r)^n – 1 ]

Monthly interest payment:

Monthly Interest = Current Balance × Monthly Rate

Monthly principal payment:

Monthly Principal = Monthly Payment – Monthly Interest

Remaining balance:

New Balance = Previous Balance – Monthly Principal

Total interest paid:

Total Interest = (Monthly Payment × n) – Loan Amount

Interest portion percentage (first month):

Interest % = (First Month Interest ÷ Monthly Payment) × 100

Extra payment effect:

New Balance = Previous Balance – (Monthly Principal + Extra Payment)

Where:

  • P = Loan amount (principal)

  • r = Monthly interest rate (annual rate ÷ 12 ÷ 100)

  • n = Total number of payments (years × 12)

  • Monthly Payment = Total payment per period

Real-Life Examples Section

  • Example scenario:

    • Loan amount: $300,000

    • Interest rate: 6.5%

    • Loan term: 30 years (360 months)

    • Monthly payment: $1,896

    Year 1 amortization (first 12 months):

    • Total paid: $1,896 × 12 = $22,752

    • Interest paid: $19,400

    • Principal paid: $3,352

    • Remaining balance: $296,648

    Mid-loan (year 15):

    • Remaining balance: $217,000

    • Interest portion: ~48% of payment

    • Principal portion: ~52% of payment

    Final year (year 30):

    • Remaining balance: $18,000 at start of year

    • Interest portion: ~6% of payment

    • Principal portion: ~94% of payment

    Total over 30 years:

    • Total payments: $682,633

    • Total interest: $382,633

    • Total principal: $300,000

    With $200 extra monthly payment:

    • New payoff time: ~24 years 8 months

    • Interest saved: ~$88,000

    • Time saved: ~5 years 4 months

    Clear takeaway: In the first year, only $3,352 of your $22,752 in payments goes to principal. By year 15, the split is nearly even. In year 30, nearly all payment goes to principal. This illustrates why extra payments early in the loan have the greatest impact.

FAQs

1. What is amortization?
Amortization is the process of paying off a loan through scheduled payments over time. Each payment includes principal and interest. Early payments are mostly interest; later payments are mostly principal.

2. How is amortization calculated?
Amortization is calculated using the loan amount, interest rate, and term. Each period, interest is calculated on the remaining balance, and the rest of the payment reduces principal.

3. What is an amortization schedule?
An amortization schedule is a table showing every payment over the loan term, including the amount paid to principal, the amount paid to interest, and the remaining balance.

4. Why do I pay more interest early in the loan?
Interest is calculated on your remaining balance. Early in the loan, your balance is highest, so interest is highest. As you pay down principal, interest decreases.

5. What is the difference between amortization and depreciation?
Amortization applies to intangible assets and loan repayment. Depreciation applies to physical assets. Both allocate costs over time but for different asset types.

6. How does loan term affect amortization?
Longer terms have lower monthly payments but more total interest. Shorter terms have higher monthly payments but less total interest. This calculator lets you compare different terms.

7. What is a fully amortized loan?
A fully amortized loan is paid off completely by the end of the term through regular payments. At the final payment, the balance reaches zero.

8. What happens if I make extra payments?
Extra payments reduce principal faster, which lowers total interest and shortens the loan term. This calculator shows the impact of extra monthly and one-time payments.

Disclaimer

This Amortization Calculator is provided for educational and planning purposes only. Results are based on standard amortization formulas and the numbers you enter. Actual loan payments may vary based on lender-specific fees, insurance, taxes, and payment timing. This tool does not constitute financial or mortgage advice. Consult a licensed mortgage lender or financial advisor before making borrowing decisions. Toolraxy is not responsible for any actions taken based on these calculations.

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