Mortgage Calculator
Editable market rates
Calculate your monthly mortgage payments, see the full amortization schedule, and check affordability. Works for both residential and buy-to-let mortgages.
Full UK monthly cost (P&I + council tax + insurance + service charge)
True out-of-pocket cost — not just P&I. For BTL, council tax is normally the tenant's liability during a tenancy (we show both with and without).
During a tenancy (tenant pays council tax)
£1,217/mo
During voids / owner-occupier
£1,398/mo
P&I£1,188
Council tax (Band D)£181
Buildings insurance£29
Service charge£0
Mortgage Details
£75,000
Loan-to-Value:
75% LTV
Market avg: 4%
Rates as of Apr 2026
25 years
UK fixes lock the rate for 2 / 5 years then revert to SVR. Trackers move with BoE base rate. Most BTL is on 5-year fixes for the longer stress-test exemption.
Monthly Payment
£1,188
Principal + Interest
Total Interest
£131,290
Over 25 years
Total to Repay
£356,290
Principal + Interest
LTV:75%
Loan:£225,000
Type:Residential
First 5 Years Breakdown
See how your payments are split between principal and interest
Year 1Balance: £219,651
Principal: £5,349Interest: £8,903
Year 2Balance: £214,084
Principal: £5,567Interest: £8,685
Year 3Balance: £208,290
Principal: £5,794Interest: £8,458
Year 4Balance: £202,261
Principal: £6,030Interest: £8,222
Year 5Balance: £195,985
Principal: £6,275Interest: £7,976
Recommendations
Monthly Payment Formula
M = P × [r(1+r)ⁿ] / [(1+r)ⁿ-1]
Where M = monthly payment, P = principal (loan amount), r = monthly interest rate (annual rate ÷ 12), and n = total number of payments (years × 12).