How fixed rate mortgages work
A fixed rate mortgage charges the same interest rate for an agreed period - the fixed term. Your monthly payment stays the same regardless of changes to the Bank of England base rate or your lender's standard variable rate (SVR). At the end of the fixed term, the rate automatically reverts to the lender's SVR, which is typically 2-4% above the best available fixed rates. Most borrowers remortgage at or before the end of the fixed term to avoid paying SVR.
The fixed period
Fixed terms of two, three, five, and ten years are the most commonly available. Two-year fixed rates are typically lower than five-year rates as the lender carries less interest rate risk. Five-year rates provide greater certainty and are often preferred where stability is the priority. Ten-year fixed rates offer the longest payment certainty but usually include stricter early repayment charge terms.
Early repayment charges (ERCs)
Fixed rate mortgages include early repayment charges if you repay the mortgage or switch to a different product before the fixed term ends. ERCs are typically calculated as a percentage of the outstanding loan, declining over the fixed period - for example 5% in year one, 4% in year two, and so on. Understanding the ERC structure matters if there is any prospect of moving, selling, or remortgaging before the end of the term.
Overpayment allowances
Most fixed rate mortgages allow annual overpayments of up to 10% of the outstanding balance without triggering an ERC. Borrowers who want to reduce their mortgage balance faster can make overpayments within this allowance. Overpaying beyond the permitted amount triggers the ERC on the excess.
Fixed vs variable - when fixed makes sense
Fixed rates are appropriate when payment certainty is more important than the chance of benefiting from rate cuts. In a falling rate environment, a variable rate mortgage may end up cheaper than a fixed rate - but the monthly payment is unpredictable. Most borrowers, particularly those with tight affordability or who are on a single income, prefer the certainty of a fixed payment. Fixed rates also make budgeting straightforward for buy-to-let landlords, where the mortgage payment is a known outgoing against rental income.
Choosing the right fixed term
Two-year fixed rates
Two-year fixed rates offer a lower initial rate in most market conditions and provide certainty for a shorter period. They suit borrowers who expect their circumstances to change - income growth, moving home, or remortgaging for equity release - within two years. The downside is that you revert to SVR at the end of the term and must remortgage sooner, which involves more arrangement fees and administrative work over time.
Five-year fixed rates
Five-year fixed rates provide five years of payment certainty, which suits borrowers who want to set and forget their mortgage for a meaningful period. The rate is typically slightly higher than a two-year fix but avoids the remortgage cycle every two years. Five-year fixes are the most popular choice for owner-occupiers and buy-to-let landlords seeking income stability.
Ten-year fixed rates
Ten-year fixed rates offer the longest payment certainty available on a standard mortgage product. They are most appropriate for borrowers who are confident they will not move, sell, or need to remortgage for a decade - as the ERCs on a ten-year product are typically more substantial and the rate premium over shorter terms is significant. A smaller number of lenders offer ten-year fixes than two or five-year products.
Fixed rate mortgages for different borrower types
First time buyers
First time buyers frequently choose five-year fixed rates to ensure payment certainty through the period of establishing household finances. The higher deposit required for a lower rate tier is worth modelling - the saving on rate over five years often outweighs the additional deposit required to access a better LTV band.
Remortgage to fixed rate
Borrowers coming off a fixed rate period onto SVR should compare the full market at least three months before the current deal expires. A new fixed rate remortgage can be agreed in advance and set to start on the day the current rate expires, avoiding any time on SVR.
Buy-to-let fixed rates
Fixed rate buy-to-let mortgages are assessed on ICR at a stressed rate - typically 5.5-7.5% - regardless of the actual product rate. A lower actual fixed rate does not automatically mean the ICR passes on a lower stress rate. The specific stress rate used by each lender matters and varies.
Complex income and fixed rates
Self-employed borrowers, contractors, and company directors can access fixed rate mortgages from specialist lenders who assess income correctly. The rate available is the same as for employed borrowers - the difference is in how the income is assessed to determine the maximum loan.
Why whole-of-market comparison matters for fixed rates
Fixed rates differ not just between lenders but within each lender's range depending on LTV band, loan size, property type, and borrower profile. A 75% LTV fixed rate is different from an 85% LTV rate. Broker-exclusive fixed rates - not available direct to borrowers - are often below the same lender's direct rates. Doulton Bridging Finance compares the full panel including broker-only products to ensure the rate returned is genuinely the most competitive available for your specific circumstances.