EyeOnIllustrative amount scenario
Illustrative scenario only: not financial advice, a lender decision, an offer, a quote, a credit-score forecast, or a guarantee of savings, repayment, approval, eligibility, tax treatment, or any financial outcome.
What this calculation shows
A remortgage savings calculation compares your current mortgage arrangements with a prospective replacement to estimate differences in monthly payments and total cost over a chosen period. The focus is often on the break-even point: the time it takes for lower monthly payments to offset any one-off costs associated with switching. This helps clarify whether a move is likely to pay for itself during the period you expect to hold the mortgage.
Results are illustrative and depend on the inputs you provide. They typically assume consistent interest rates and no additional changes to the loan balance or term. Real outcomes can vary if rates change, if you make extra repayments, or if the new arrangement includes variable elements. Treat the output as a planning tool rather than a precise forecast.
Key inputs to include
Remaining loan balance and remaining term are primary drivers: the balance determines how much interest is applied, and the term affects the monthly amortization. Current and prospective interest rates determine the direction and magnitude of any monthly saving. A small change in rate on a large balance can yield a substantial change in monthly payment, while a longer or shorter term alters how interest is paid over time.
Include any switching costs such as legal, valuation, arrangement, or early-exit fees when estimating net benefit. These are typically deducted from projected gross savings to produce a net saving or loss. Also consider whether the new arrangement changes the loan structure — for example, a change from fixed to variable rate or from interest-only to principal-and-interest — since that can affect both monthly cash flow and longer-term cost.
Interpreting the break-even and next steps
The break-even point is the month count at which cumulative lower payments equal the one-off costs of switching. If your anticipated holding period is shorter than the break-even timeframe, net savings are less likely; if you plan to stay beyond break-even, the move may become cost-effective in theory. Consider also how long-term interest trends, potential rate resets, and personal plans for the property could shift the practical value of any move.
Use the calculation as a basis for further exploration: run scenarios with different rates, terms, and fee levels to see how sensitive results are to small changes. Review the terms and exit conditions of any new arrangement, and consider discussing options with a qualified adviser to align choices with your broader financial goals. Adjust inputs for realistic expectations about future rate movements and planned repayments before deciding.