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Mortgage Calculator: How to Estimate Your Monthly Payments

Finance

Understanding Mortgage Payments

Your monthly mortgage payment typically consists of four components, often called PITI: Principal, Interest, Taxes, and Insurance. The principal and interest make up the bulk of the payment and depend on your loan amount, interest rate, and repayment term.

Fixed vs Variable Rates

Fixed-rate mortgages lock in your interest rate for a set period (commonly 2, 3, or 5 years in the UK), meaning your monthly payments remain stable. Variable-rate mortgages (tracker or discount) can change with the Bank of England base rate, which means your payments could go up or down.

How Deposit Size Affects Your Mortgage

A larger deposit means a lower loan-to-value (LTV) ratio, which typically qualifies you for better interest rates. For example, a 10% deposit gives you a 90% LTV mortgage, while a 25% deposit gives you a 75% LTV mortgage with significantly lower rates.

Use Our Calculator

Try our free mortgage calculator to estimate your monthly payments and see a full amortisation schedule.

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