Compare Two Mortgages 2026

Q How do I compare two mortgage deals fairly?

Compare the total cost over the same window - usually the fixed-rate period (e.g. 2 or 5 years) - not just the headline rate. Add up the monthly payments over that window plus any arrangement or product fee. A lower rate with a big fee can end up dearer than a slightly higher fee-free rate over a short fix. Use the same loan amount and term for both deals: this calculator counts payments and fees only, not the balance left at the end of the window, so a shorter term (higher payments, more capital repaid) would look dearer than it is.

Q Should I include the arrangement fee?

Yes. A product or arrangement fee can change which deal is cheaper, especially over a short fixed period where the interest difference is small. This calculator adds each deal's fee to its payments over the horizon. If a fee is added to the loan rather than paid upfront, enter it in the amount instead, because you then pay interest on it.

Q What horizon should I use?

Use the length of the fixed-rate deal you are comparing - most people remortgage at the end of the fix, so the cost that matters is what you pay during it. A 2-year comparison and a 5-year comparison can point to different winners.