Calculator
Interest Only Mortgage Calculator
Estimate how interest-only repayments may affect your cash flow, loan strategy, and future planning before you move to principal and interest repayments.
How It Helps
Plan Interest Only Periods
An interest-only mortgage calculator can help you understand what your repayments may look like during the interest-only term and what may change once principal repayments begin. It is a practical way to compare scenarios, review affordability, and prepare for the longer-term cost of the loan.

Guide
Using This Calculator
Use this tool to review interest-only repayments, compare scenarios, and better understand what may change when principal repayments begin.
- Enter your loan amount, interest rate, and interest-only term to estimate repayments during that period.
- Review how repayments may change once the loan converts to principal and interest.
- Use the results to compare cash flow scenarios and prepare for future repayment increases.
- Keep in mind that lender policy, fees, and your broader financial position may affect the final outcome.
Frequently Asked Questions
Interest Only Mortgage FAQs
Clear answers to common questions about interest-only lending, repayment structure, and what to consider before moving forward.
What is an interest-only mortgage?
An interest-only mortgage allows you to pay only the interest charged on the loan for a set period. Once that period ends, repayments usually increase because you begin repaying both principal and interest.
Who may use an interest-only loan?
Interest-only loans are often considered by investors, borrowers managing short-term cash flow, or people with a clear repayment strategy. Suitability depends on your goals, budget, and lender policy.
Does interest only mean the loan is cheaper?
Not necessarily. Repayments may be lower during the interest-only term, but the total interest paid over the life of the loan can be higher if the principal is not reduced early.
What happens after the interest-only period?
Once the interest-only term ends, repayments generally rise because the remaining loan balance must be repaid over a shorter principal and interest period.
Can this calculator replace financial advice?
No. This calculator is a guide only. It can help you explore repayment scenarios, but tailored advice should consider your income, goals, property plans, and lender options.
Can Links Property Finance help compare lenders?
Yes. We can help you compare lender options, explain how interest-only features may work in practice, and guide you through the next steps with clarity and confidence.
Important Information
Guide only
This calculator is provided as a general guide only and does not replace personalised credit assistance or financial advice. Results may not reflect all lender policies, fees, interest rate changes, or the impact of moving from interest only to principal and interest repayments. Your borrowing capacity, loan structure, and eligibility will depend on your full financial position and the lender you choose.
If you would like help understanding the numbers, Links Property Finance can talk you through your options and compare suitable lenders based on your goals.
Next Step
Discuss Your Loan Options
If you are weighing up an interest-only strategy, Links Property Finance can help you compare lenders, understand repayment changes, and move forward with confidence.
