Understanding UK Mortgages
A mortgage is a loan secured against a property. In the UK, most residential mortgages are either repayment (where you pay off capital and interest each month) or interest-only (where you only pay interest and must repay the capital at the end). Understanding the total cost over the full term is crucial when comparing mortgage deals.
Repayment vs Interest-Only
Repayment mortgages cost more each month but guarantee the loan is paid off by the end of the term. Interest-only mortgages have lower monthly payments but require a separate plan to repay the capital. Most residential lenders now require a credible repayment strategy for interest-only mortgages.
How LTV Affects Your Rate
Loan-to-value ratio significantly impacts the interest rates available to you. The best rates are typically available at 60% LTV or below. Rates increase at higher LTV brackets (75%, 85%, 90%, 95%). A larger deposit not only reduces your monthly payment through a smaller loan, but also gives you access to cheaper interest rates.
Frequently Asked Questions
How much deposit do I need?â–¾
The minimum deposit for most UK mortgages is 5% of the property price. However, a 10-15% deposit significantly improves the rates available. For buy-to-let mortgages, most lenders require at least 25%. Government schemes like Help to Buy and Shared Ownership can help with smaller deposits.
Should I fix my mortgage rate?â–¾
Fixed rates offer payment certainty for 2-5 years. Variable rates (tracker or SVR) may start lower but can increase with the Bank of England base rate. In a rising rate environment, fixing provides protection. Consider your risk tolerance and financial flexibility when choosing.
Can I overpay my mortgage?â–¾
Most UK mortgages allow overpayments of up to 10% of the outstanding balance per year without penalty. Overpaying reduces the total interest paid and shortens the mortgage term. Even small regular overpayments can save thousands over the life of the mortgage.
Calclypso Editorial Team
Mortgage calculations use standard amortization formulas. Last updated: April 2026. This calculator is for estimation purposes. Consult a mortgage adviser for personalised advice.