Quick answer
- Every figure below uses a repayment mortgage and the stated 4.00% annual rate.
- The worked scenarios show how the loan balance changes after a deposit or equity contribution.
- Amount and term comparisons change one input while keeping the other assumptions fixed.
- The examples are planning illustrations, not current lender quotes or approval decisions.
On this page
Read the assumptions before reading the numbers
The examples below use standard repayment-mortgage maths. They are not lender quotes and do not include mortgage protection, home insurance, legal fees, valuation, survey, management fees, property tax, repairs or moving costs.
Use them to understand scale, then replace every assumption with your own figures in the Mortgage Calculator.
Example repayments by mortgage amount
This table uses a 30-year repayment mortgage at 4.00% interest.
| Mortgage amount | Approx. monthly repayment | Total repaid | Total interest |
|---|---|---|---|
| €250,000 | €1,194 | €429,674 | €179,674 |
| €300,000 | €1,432 | €515,609 | €215,609 |
| €350,000 | €1,671 | €601,543 | €251,543 |
| €400,000 | €1,910 | €687,478 | €287,478 |
| €450,000 | €2,148 | €773,413 | €323,413 |
Three worked mortgage situations
Each situation below uses a 4.00% annual rate. The purpose is to show how the mortgage balance is chosen before the repayment is calculated.
| Situation | How the loan is derived | Term | Approx. monthly repayment |
|---|---|---|---|
| First-time buyer | €300,000 purchase minus €30,000 deposit = €270,000 mortgage | 30 years | €1,289 |
| Home mover | €450,000 purchase minus €100,000 available equity = €350,000 mortgage | 25 years | €1,847 |
| Switcher | €250,000 outstanding balance moved to a new scenario | 20 years remaining | €1,515 |
The deposit and equity amounts are simplified examples. Actual available funds may be lower after selling, buying, legal, valuation and other costs. A switcher should also check any break fee, cashback condition and product eligibility separately.
Example repayments by term
This table uses a €350,000 mortgage at 4.00% interest.
| Term | Approx. monthly repayment | Total repaid | Total interest |
|---|---|---|---|
| 20 years | €2,121 | €509,023 | €159,023 |
| 25 years | €1,847 | €554,229 | €204,229 |
| 30 years | €1,671 | €601,543 | €251,543 |
| 35 years | €1,550 | €650,879 | €300,879 |
The 35-year example has the lowest monthly repayment in this table, but the highest total interest. That is the trade-off buyers should understand before focusing only on monthly cost.
How to adapt an example to your own mortgage
- Replace the example mortgage with the amount you expect to borrow or the balance you still owe.
- Replace 4.00% with the annual rate for the product or scenario you are testing.
- Use the proposed full term for a purchase or the remaining term for a switch.
- Run the calculation again after changing only one input, so you can see what caused the difference.
- Compare the result with your complete monthly budget and keep excluded costs separate.
The Mortgage Calculator produces the personalised arithmetic. For a step-by-step explanation of its inputs and outputs, use the calculator usage guide.
Frequently asked questions
What is the repayment on a €300,000 mortgage?
At 4.00% over 30 years, the example repayment is about €1,432 per month before insurance and other costs.
What is the repayment on a €400,000 mortgage?
At 4.00% over 30 years, the example repayment is about €1,910 per month before insurance and other costs.
What is the repayment on a €270,000 mortgage?
At 4.00% over 30 years, the worked first-time buyer example is about €1,289 per month before insurance and other costs.
Why do the examples exclude mortgage protection?
Protection costs depend on age, health, cover type and provider, so they should be budgeted separately.
Are these examples lender quotes?
No. They are mathematical illustrations using the stated loan, rate and term. Available rates, approval outcomes and product costs can differ.
Should I compare 25 and 30 years?
Yes. Comparing terms helps you see the trade-off between monthly repayment and total interest.
How do I create an example for a mortgage switch?
Use the outstanding balance, the alternative annual rate and the remaining term, then check switching fees, incentives and eligibility separately.
Sources & references
- Central Bank of Ireland: mortgage measures
- CCPC: mortgage monthly repayment estimator
- CCPC: mortgage overpayment calculator
- CCPC: paying extra off your mortgage
- Central Bank of Ireland: mortgage switching
- CCPC: applying for a mortgage
- CCPC: first-time buyer guide
- Citizens Information: taking out a mortgage
- Revenue: Help to Buy Scheme
- Revenue: Help to Buy amount
- Revenue: residential Stamp Duty rates
- First Home Scheme: eligibility
- First Home Scheme: property price ceilings
- Bank of Ireland: mortgage documentation checklist
- AIB: mortgage approval in principle guidance
Related calculators
Use these tools for the numbers behind this guide.