Mortgage Calculator
Use our Mortgage Calculator to estimate monthly mortgage payments, total interest, and loan cost based on loan amount, interest rate, and loan term.
Mortgage Details
Summary
1,754.00
526,131.00
Mortgage Payment Chart
| Year | Interest Paid | Principal Paid | Total Paid | Remaining Debt |
|---|---|---|---|---|
| 1 | 14,860 | 6,186 | 21,045 | 293,814 |
| 2 | 14,543 | 6,502 | 42,090 | 287,312 |
| 3 | 14,210 | 6,835 | 63,136 | 280,477 |
| 4 | 13,861 | 7,185 | 84,181 | 273,293 |
| 5 | 13,493 | 7,552 | 105,226 | 265,741 |
| 6 | 13,107 | 7,938 | 126,271 | 257,802 |
| 7 | 12,701 | 8,345 | 147,317 | 249,457 |
| 8 | 12,274 | 8,772 | 168,362 | 240,686 |
| 9 | 11,825 | 9,220 | 189,407 | 231,466 |
| 10 | 11,353 | 9,692 | 210,452 | 221,773 |
| 11 | 10,857 | 10,188 | 231,498 | 211,585 |
| 12 | 10,336 | 10,709 | 252,543 | 200,876 |
| 13 | 9,788 | 11,257 | 273,588 | 189,619 |
| 14 | 9,212 | 11,833 | 294,633 | 177,786 |
| 15 | 8,607 | 12,438 | 315,679 | 165,348 |
| 16 | 7,970 | 13,075 | 336,724 | 152,273 |
| 17 | 7,302 | 13,744 | 357,769 | 138,529 |
| 18 | 6,598 | 14,447 | 378,814 | 124,082 |
| 19 | 5,859 | 15,186 | 399,860 | 108,896 |
| 20 | 5,082 | 15,963 | 420,905 | 92,934 |
| 21 | 4,266 | 16,780 | 441,950 | 76,154 |
| 22 | 3,407 | 17,638 | 462,995 | 58,516 |
| 23 | 2,505 | 18,541 | 484,041 | 39,975 |
| 24 | 1,556 | 19,489 | 505,086 | 20,486 |
| 25 | 559 | 20,486 | 526,131 | 0 |
Mortgage Calculations Explained 🏠
A mortgage is a loan taken to purchase a home, with repayments covering both principal and interest over time.
Understanding how repayment amounts, interest rates, and loan terms interact allows you to plan effectively, manage costs, and make informed borrowing decisions.
This calculator helps visualize the impact of different scenarios, including fixed vs variable rates, term lengths, and overpayments.
Key Facts
- Mortgage repayments consist of principal (loan amount) and interest (cost of borrowing).
- Early in the term, repayments primarily cover interest; later, more goes toward principal.
- Even small overpayments can significantly reduce the total interest paid and shorten the mortgage term.
- Fixed-rate mortgages have predictable payments; variable rates can fluctuate with market changes.
- Total cost of a mortgage is affected by interest rate, loan term, repayment frequency, and any additional payments.
Formulas
- Monthly Mortgage Repayment (Fixed Rate)
M = P × (r × (1 + r)^n) ÷ ((1 + r)^n - 1)- M is monthly repayment, P is principal, r is monthly interest rate, and n is total number of payments. - Total Interest Paid
Total Interest = (M × n) - P- Calculates the total interest over the life of the loan based on monthly repayments and principal. - Effect of Overpayments
Reduced Term ≈ log(1 - (Extra Payment × r ÷ M)) ÷ log(1 + r)- Extra payments reduce principal faster, shortening the loan term and lowering total interest.
Mortgage Repayment Examples
- Loan: £200,000, 3% annual interest, 25-year term → monthly payment ≈ £948.
- Same loan with £100 extra monthly payment → loan term reduced by several years and interest savings of thousands.
- Variable rate increase from 3% to 4% → monthly repayment increases, total interest rises, term may remain the same if payments aren’t adjusted.
Impact of Term Length
- Shorter term (15 years) → higher monthly repayments, lower total interest.
- Longer term (30 years) → lower monthly repayments, higher total interest.
- Choosing the right term balances affordability with total cost.
FAQs
Does this calculator include all fees or insurance?
No. It estimates repayments based on principal, interest, and term only. Fees, insurance, and taxes are not included.
What’s the difference between fixed and variable rates?
Fixed rates remain constant over the term; variable rates can change with market conditions, affecting repayments.
Can overpayments really save thousands?
Yes. Paying extra toward principal reduces the outstanding balance faster, lowering interest accrued and shortening the loan term.
Are these repayment figures guaranteed?
No. They are estimates for educational purposes. Actual repayments depend on lender policies, interest changes, and individual circumstances.
Why use this mortgage calculator?
It helps plan payments, compare scenarios, and understand the long-term impact of interest, term, and repayment strategies.