Property
Interest-only versus repayment Calculator
Compare interest-only payments plus a repayment savings plan with capital repayment. This free interest-only versus repayment calculator shows the calculation and its assumptions so you can compare your own figures.
Your results
Compare interest-only payments plus a repayment savings plan with capital repayment.
Calculated outcomes
- Interest Only Monthly Payment
- €833.33
- Capital Due At End
- €250,000.00
- Monthly Repayment Vehicle Contribution
- €563.70
- Total Interest Only Interest
- €250,000.00
Assumptions and estimates
- Principal remains due in full on an interest-only loan. The separate end-of-month savings plan assumes constant after-tax returns and is not guaranteed to repay the capital. Product availability, lender criteria, fees and changing rates are not modelled.
- Method: Calculate monthly interest and the contribution needed to accumulate the principal at the chosen net return.
- Principal remains due in full; investment returns are uncertain. No lender approval or product availability implied.
Useful next steps
- Lending limits are a guide only. Contact a lender or mortgage broker for an assessment before committing to a purchase.
- Use Compare options to test an alternative side by side.
- Copy, print or download a record of this calculation when you need one.
Reports open your email app addressed to s@s1.ie with the public page address only. Your inputs are never added.
How the interest-only versus repayment calculation works
Calculate monthly interest and the contribution needed to accumulate the principal at the chosen net return.
Principal remains due in full; investment returns are uncertain. No lender approval or product availability implied.
Using this calculator
- Enter your own figures in the labelled inputs. Keep the currencies, units and time periods consistent.
- Choose any applicable rate profile, pattern or assumption shown for this tool. Open additional inputs when relevant.
- Review interest only plus savings monthly and repayment mortgage monthly payment, then read the stated assumptions and eligibility conditions before using the result.
Worked example
This is a static example using illustrative inputs, not facts about you or today’s date. The displayed eligibility selections and assumptions apply only to this example.
See example inputs
- Loan principal (€)
- 250000
- Annual mortgage rate (%)
- 4
- Loan term (years)
- 25
- Savings plan annual net return (%)
- 3
- Interest Only Plus Savings Monthly
- €1,397.04
- Repayment Mortgage Monthly Payment
- €1,319.59