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 US monthly payment (PITI + PMI + HOA)
Real out-of-pocket cost — not just P&I. Adjust state, insurance, HOA, and loan type to match your deal.
Total monthly (PITI)
$1,892
LTV 75% · Loan $225,000
Principal & Interest$1,555
Property tax (0.75%)$188
Home insurance$150
Mortgage Details
$75,000
Loan-to-Value:
75% LTV
Market avg: 6.75%
Rates as of Apr 2026
25 years
US 30/15-year fixed locks the rate for the entire loan term. ARMs (5/1, 7/1) fix for 5-7 years then adjust annually — typically 50-100 bps cheaper upfront. DSCR loans for investment property qualify on the property's rent.
Monthly Payment (PITI)
$1,892
P&I $1,555 + Tax/Ins/HOA/$338
Total Interest
$241,365
Over 25 years
Total to Repay
$466,365
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: $221,424
Principal: $3,576Interest: $15,078
Year 2Balance: $217,598
Principal: $3,825Interest: $14,829
Year 3Balance: $213,506
Principal: $4,092Interest: $14,563
Year 4Balance: $209,130
Principal: $4,377Interest: $14,278
Year 5Balance: $204,448
Principal: $4,681Interest: $13,973
Recommendations
- WINLoan-to-value is 75% — within the 75% buy-to-let ceiling, so you keep access to the better-priced investor mortgages.
- TIPEven a small monthly overpayment shortens the term and cuts total interest — run the numbers in the overpayment calculator before you fix your deal.
- CHECKOver the full term you'd pay $241,365 in interest — more than the $225,000 you borrowed. Overpaying cuts this sharply.
Jargon: · · ·
LTV
LTV (Loan-to-Value)
Mortgage amount as a percentage of property value. A £150k loan on a £200k property = 75% LTV. BTL lenders typically cap at 75%; investor mortgages get cheaper as LTV drops.
ICR
ICR (Interest Coverage Ratio)
Lender's stress test: rent ÷ stressed mortgage interest. Most BTL lenders require ICR ≥ 1.25 at a stress rate of 5.5–7.5%. ICR < 1 means the rent cannot cover the stressed mortgage.
amortisation
Amortisation
How a repayment mortgage is paid down over time. Early payments are mostly interest; later ones are mostly capital. Overpaying cuts the balance directly, so less interest accrues and the term shortens.
overpayment
Overpayment
Paying more than your contractual monthly mortgage payment (or a one-off lump sum). It reduces the balance immediately, shortening the term and cutting total interest — but watch the 10% annual ERC allowance on fixed deals.
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).