Salary Slip Generator

Interest-Only Loan Calculator

Calculate payments for the I-O period and the amortized period.

The Two-Phase Loan: The Interest-Only Loan Calculator

An interest-only (I-O) loan is a unique type of financing where the borrower pays only the interest on the loan for a specified period. After this initial period, the loan converts to a standard amortizing loan, and the borrower must start paying both principal and interest. As a specialized resource from salary-slip-generator.com, the Interest-Only Loan Calculator is a tool that demystifies this two-phase structure. It clearly shows you what your monthly payment will be during the low, interest-only period and what it will jump to once you start paying down the principal.

This calculator is crucial for anyone considering an interest-only mortgage or loan, which are sometimes used by real estate investors or individuals with fluctuating incomes. It highlights the main benefit—significantly lower initial payments—and the main risk: "payment shock." The jump in payment after the I-O period can be substantial, and this tool quantifies that jump exactly. By seeing both payment amounts, you can determine if you can truly afford the loan over its entire life, not just during the introductory period.

Why Calculate Interest-Only Loan Payments?

  • Manage Cash Flow: I-O loans provide maximum cash flow flexibility during the initial years, which can be advantageous for investors who want to use capital elsewhere.
  • Avoid Payment Shock: The biggest risk is underestimating the higher, fully-amortized payment. This calculator shows you exactly what that payment will be so you can plan for it.
  • Compare to Standard Loans: It allows you to make an informed comparison between an I-O loan and a traditional loan. You can weigh the lower initial payments against the fact that you are not building any equity during the I-O period.
  • Understand Loan Mechanics: It provides a clear, practical education on how different loan amortization structures work.

How to Use the Interest-Only Loan Calculator

Our tool makes it easy to see both phases of your potential loan payment.

  1. Enter Loan Amount and Rate: Input the total amount you are borrowing and the loan's annual interest rate.
  2. Set the Loan Terms: Provide the full term of the loan (e.g., 30 years) and the duration of the initial interest-only period (e.g., 10 years).
  3. Calculate Payments: Click the button to see the results. The tool will display your monthly payment during the interest-only period and the new, higher monthly payment for the remainder of the loan term.

Frequently Asked Questions (FAQ)