Comparison · Mortgages · 2026
Capped Rate vs Discount Rate Mortgage UK 2026: Protection vs Lower Cost
Both capped rate and discount rate mortgages are variable rate products linked to the lender's standard variable rate, but they behave very differently if rates rise. A discount rate mortgage gives you a lower starting rate with no protection against rate rises. A capped rate mortgage usually starts slightly higher but guarantees your rate cannot rise above a set ceiling. Here is how the two compare for 2026.
TL;DR - 30-Second Summary
- - Discount rate: lower starting rate, tracks lender SVR minus a fixed discount, no ceiling on how high it can rise
- - Capped rate: slightly higher starting rate, tracks a lender rate but cannot rise above a contractual cap
- - Both: revert to the lender's standard variable rate once the deal period ends
Side by Side: Capped Rate vs Discount Rate
| Feature | Capped Rate | Discount Rate |
|---|---|---|
| Typical starting rate | Slightly higher than discount rate deals | Usually lower |
| Ceiling on rate rises | Yes — contractual cap | No ceiling |
| Benefits if rates fall | Yes — payments can fall | Yes — payments can fall |
| Product availability | Niche — fewer lenders offer these | More widely available |
| Typical deal length | 2-5 years | 2-5 years |
| Overpayment allowance | Typically up to 10%/year | Typically up to 10%/year |
| At end of deal | Reverts to lender SVR | Reverts to lender SVR |
How a Capped Rate Mortgage Works
A capped rate mortgage tracks a variable reference rate (usually the lender's SVR, sometimes the Bank of England base rate) but includes a contractual maximum rate written into the mortgage offer. If the underlying rate rises above the cap, your payments simply do not increase further — the lender absorbs the difference for the remainder of the deal period.
Because this protection has value to the borrower, capped rate deals are usually priced slightly above equivalent discount rate deals, and are a relatively niche product only offered by a limited number of lenders, often building societies, at any given time.
How a Discount Rate Mortgage Works
A discount rate mortgage is priced as a fixed percentage discount below the lender's standard variable rate (SVR) — for example, "SVR minus 1.5%" for two years. If the SVR rises or falls, your rate rises or falls by the same amount, maintaining the fixed discount throughout the deal period.
This typically produces a lower starting rate than a capped rate or fixed rate deal, but with no protection at all if the lender's SVR rises sharply — your monthly payment could increase significantly with no contractual limit.
Who Should Choose What?
- - You want some benefit from falling rates but need a worst-case ceiling
- - You are on a tight budget and cannot absorb unlimited payment rises
- - You can find a competitive capped product with a suitable cap level
- - You want the lowest possible starting rate
- - You have a financial buffer to absorb rate rises
- - You expect to remortgage again well before rates might rise significantly