Mortgage Decision Simulator (UK)
Impact clarity for mortgage choices
Illustrative mortgage scenario calculator for UK buyers. Compare payment impact, overpayments, and LTV movement with plain-English takeaways.
View assumptions and methodologyImportant
This tool provides illustrative calculations only. It is not financial advice, mortgage advice, or a recommendation.
BoE Bank Rate (reference)3.75%
Bank Rate set on5 February 2026
Next MPC decision19 March 2026
Last updated2 Mar 2026, 18:42
Inputs
Enter your mortgage assumptions and calculate illustrative outcomes.
Need a quick explanation?
These definitions are plain-English helpers to interpret the numbers.
What is LTV?
LTV means Loan to Value: loan amount divided by property price. Lower LTV bands can unlock better mortgage pricing.
What is APR in this tool?
APR is the mortgage interest rate you enter for your scenario. It is not auto-set from the Bank of England rate.
What does end-of-fixed balance mean?
It is the estimated amount still owed when your fixed period ends. This balance drives your next payment at remortgage/reversion rates.
What does rate sensitivity show?
It shows how monthly payments could change after the fixed period if rates move by 0.25% or 1.0% up or down, using the same remaining balance and term.
Is overpaying worth it?
Overpaying typically reduces interest and lowers balance faster. This tool shows the estimated fixed-period savings and possible term reduction under constant assumptions.
BoE rate vs mortgage APR: what is the difference?
BoE Bank Rate is market context, not your personal product rate. Lenders price mortgages using multiple factors, so your APR can differ materially.