Mortgage payment and amortization planner
Estimate your mortgage payment, total interest, housing costs and amortization schedule. Compare extra payments and download a clear PDF summary — free, private and no signup required.
Set the property, deposit, rate and repayment plan.
Optional costs are included in the total housing payment, not in mortgage interest.
Model recurring and one-time overpayments. Results never reduce scheduled payments below the final balance.
Estimated payment
per month · principal & interest
Monthly equivalent: €1,477.94
Mortgage monthly equivalent plus selected housing costs.
Planning estimate: lender fees, rate conventions, escrow rules and local taxes can change the actual payment. Verify important figures with a lender or qualified financial adviser.
Compare the remaining balance with and without overpayments.
Compare illustrative recurring monthly overpayments.
| Extra / month | Monthly outflow | Interest | Interest saved | Payoff |
|---|---|---|---|---|
| €0.00 | €1,477.94 | €163,383.86 | €0.00 | 25 years |
| €100.00 | €1,577.94 | €144,494.21 | €18,889.65 | 22 years 6 months |
| €250.00 | €1,727.94 | €123,370.31 | €40,013.55 | 19 years 6 months |
| €500.00 | €1,977.94 | €99,455.80 | €63,928.06 | 16 years |
Track principal, interest, overpayments and balance.
| Year | Payment | Principal | Interest | Extra | Balance |
|---|---|---|---|---|---|
| 1 | €17,735.28 | €6,656.41 | €11,078.87 | €0.00 | €273,343.59 |
| 2 | €17,735.28 | €6,927.62 | €10,807.66 | €0.00 | €266,415.97 |
| 3 | €17,735.28 | €7,209.87 | €10,525.41 | €0.00 | €259,206.10 |
| 4 | €17,735.28 | €7,503.61 | €10,231.67 | €0.00 | €251,702.49 |
| 5 | €17,735.28 | €7,809.31 | €9,925.97 | €0.00 | €243,893.18 |
| 6 | €17,735.28 | €8,127.46 | €9,607.82 | €0.00 | €235,765.72 |
| 7 | €17,735.28 | €8,458.61 | €9,276.67 | €0.00 | €227,307.11 |
| 8 | €17,735.28 | €8,803.22 | €8,932.06 | €0.00 | €218,503.89 |
| 9 | €17,735.28 | €9,161.87 | €8,573.41 | €0.00 | €209,342.02 |
| 10 | €17,735.28 | €9,535.14 | €8,200.14 | €0.00 | €199,806.88 |
| 11 | €17,735.28 | €9,923.62 | €7,811.66 | €0.00 | €189,883.26 |
| 12 | €17,735.28 | €10,327.93 | €7,407.35 | €0.00 | €179,555.33 |
| 13 | €17,735.28 | €10,748.71 | €6,986.57 | €0.00 | €168,806.62 |
| 14 | €17,735.28 | €11,186.62 | €6,548.66 | €0.00 | €157,620.00 |
| 15 | €17,735.28 | €11,642.38 | €6,092.90 | €0.00 | €145,977.62 |
Understand the complete borrowing cost
Use the calculator to test a purchase price, down payment, interest rate and term before comparing a lender’s formal offer. The result separates principal and interest from optional property tax, insurance, HOA, maintenance and mortgage insurance so the estimated housing cost remains transparent.
Set the price, deposit, rate, term, frequency and optional start date.
Add recurring or one-time extra payments and review estimated time and interest savings.
Inspect the balance chart and yearly or payment-by-payment amortization table.
For a fixed-rate repayment mortgage, the level payment is calculated from the principal, periodic interest rate and total number of payments. Each payment first covers that period’s interest; the remaining amount reduces principal. At a 0% rate, principal is divided evenly across all scheduled payments.
Principal is the outstanding loan balance. Interest is charged on that balance at the periodic rate. Early in a typical amortizing mortgage, a larger share of the payment is interest. As the balance falls, more of the same scheduled payment goes toward principal.
A longer term usually reduces each scheduled payment but keeps the balance outstanding longer, often increasing total interest. A shorter term normally increases the payment but reduces the time during which interest accrues.
The down payment reduces the amount borrowed. A larger deposit normally lowers the mortgage payment and total interest and may affect loan eligibility or mortgage insurance. The calculator synchronizes the deposit amount and percentage.
These costs are not mortgage principal or interest, but they can materially affect the monthly housing budget. Add them separately to see a normalized total monthly cost. Actual escrow timing and local rules may differ.
Recurring or one-time overpayments reduce principal earlier. The calculator recalculates future interest on the lower balance, adjusts the final payment and stops when the balance reaches zero. Check whether a lender applies penalties or restrictions.
The schedule lists payment, principal, interest, extra payment and remaining balance. Yearly view provides a concise long-term summary; Monthly view displays every scheduled period, including date labels when a start date is supplied.
Monthly schedules use 12 periods per year, biweekly schedules use 26 and weekly schedules use 52. A lender may define “biweekly” differently or collect half a monthly payment, so compare the calculator assumptions with the loan contract.
For a €400,000 property with an €80,000 down payment, the mortgage principal is €320,000. At 4% annual interest over 30 years with monthly payments, the estimated principal-and-interest payment is €1,527.73. Estimated total interest is €229,982.15 and total repayment is €549,982.15. These values are generated by the same calculation engine used above.
A standard repayment mortgage uses the loan principal, periodic interest rate and number of payments to calculate a level principal-and-interest payment. Taxes, insurance and other housing costs are added separately.
Yes. You can add property tax as an annual, monthly or property-value percentage amount, plus monthly insurance, HOA, maintenance, PMI and another optional cost.
Yes. Choose every two weeks to model 26 scheduled payments per year. Weekly payments use 52 periods and monthly payments use 12.
An extra payment reduces principal earlier. Future interest is then calculated on a smaller balance, which can reduce total interest and shorten the payoff time.
Principal is the amount borrowed and repaid. Interest is the lender's charge for the loan. Early scheduled payments generally contain more interest, while later payments contain more principal.
An amortization schedule shows each payment or year, the amount allocated to principal and interest, any extra payment, and the remaining loan balance.
Yes. At 0% interest the principal is divided evenly across the scheduled payments, and the total interest is zero.
It supports many currencies and neutral mortgage inputs, but lender conventions, taxes, fees, insurance and repayment rules vary by country. Treat results as planning estimates.
Yes. Download a PDF summary containing assumptions, key results, overpayment savings, a balance chart and condensed yearly schedule, or print a clean summary from your browser.
The calculator runs in your browser. It does not require an account or send the entered mortgage scenario to a CalcsBay backend.
Disclaimer: This mortgage calculator provides general estimates and is not financial, tax, legal or lending advice. Rates, compounding conventions, fees, taxes, insurance, escrow and eligibility rules vary. Confirm any financing decision with the relevant lender or qualified adviser.