How long should you fix your mortgage for? (1, 2, 3, 5 years or more)

How long should you fix your mortgage for?

When you take out a mortgage, one of the biggest decisions is how long to fix your interest rate for. A fixed-rate mortgage keeps your interest rate the same for an agreed deal length, which can make budgeting easier—especially when mortgage rates are moving.

In the UK, fixed-rate deal lengths are commonly offered in years (such as 2, 3 and 5 years), but the exact duration can sometimes be slightly different depending on the product terms.

This guide explains the main fixed-rate options you’re likely to see, the typical advantages and trade-offs of each, and the factors that can influence which deal length may suit your plans.

How long can you fix a mortgage for?

There are several fixed-rate mortgage deal lengths available. The most widely seen options tend to include:

• 1 year (less common)
• 2 years (very common)
• 3 years (available)
• 5 years (very common)
• 10 years (available)
• Longer than 10 years (sometimes available, but not always)

It’s also worth understanding that some deals are described by a number of years, but the actual end date may be based on the product’s start date and the way the lender calculates the introductory period. Always check the offer documentation so you know exactly when the fixed period ends.

Two-year vs five-year fixed-rate mortgages

Two and five-year fixes are often popular choices. The “right” option usually comes down to how much certainty you want over your payments, and how likely you are to remortgage or move during the fixed period.

Two-year fixed-rate mortgages: typical pros and cons

Potential advantages

• More flexibility: if your circumstances change, you may be able to remortgage sooner.
• Potentially lower commitment: you’re not locked into the same rate for as long.
• If rates fall: a shorter fix can mean you reach the end of the deal sooner and may be able to switch to a different rate (subject to product terms and any early exit costs).

Potential disadvantages

• Less long-term certainty: you may face another rate decision sooner.
• Remortgaging can bring costs: every time you remortgage, there may be fees and charges to consider.
• If rates rise: you could end up on a higher rate when you come to remortgage at the end of the fixed period.

Five-year fixed-rate mortgages: typical pros and cons

Potential advantages

• Longer payment stability: you can often plan with more certainty for a longer period.
• Fewer “rate decision” points: you may not need to remortgage as often.
• Potentially helpful if you want to stay put: a longer fix can suit borrowers who expect to remain in the property.

Potential disadvantages

• Less ability to benefit from falling rates: if rates drop during your fixed period, you may not be able to switch without costs.
• Early exit costs can apply: if you remortgage during the fixed term, early repayment charges (ERCs) may apply and can be significant depending on the product.
• If you want to move: you’ll need to consider how moving affects your mortgage—whether you can port the mortgage, or whether you’ll be remortgaging.

Can you fix your mortgage for one year?

One-year fixed-rate mortgages are less common than 2- and 5-year options. Where they are available, they can appeal if you expect rates to move in your favour and you want to revisit your options relatively quickly.

However, a one-year fix also means:

• You’ll likely face another decision sooner.
• If rates rise, your payments may increase when you come to remortgage.
• Product choice may be more limited, which can affect pricing and features.

Should you fix for three years?

Three-year fixed-rate mortgages sit between the shorter and longer end of the market. They can be a useful compromise if you want more stability than a 2-year fix, but don’t want to commit for as long as 5 years.

As with any deal length, the key trade-off is the same:

• longer fixes can offer more certainty, but may reduce flexibility and increase the potential cost of switching early.

Should you fix your mortgage for 10 years?

A 10-year fixed-rate mortgage can provide extended certainty over your interest rate and monthly payments.

Why borrowers consider a 10-year fix

• Long-term budgeting confidence: fewer changes to your rate over a decade.
• Protection against rate rises during the fixed period.

Why it may be less suitable for others

• If rates fall, you may be paying more than you would on a lower-rate deal available later.
• Early exit can be costly: if you need to remortgage before the fixed period ends, ERCs may apply.

For many borrowers, 10-year fixes are a “commitment” choice—more likely to suit those who strongly value long-term stability and expect their plans to remain broadly unchanged.

What’s the maximum amount of time you can fix your mortgage for?

For many borrowers, 10 years is the longest fixed deal length you’re likely to see. Some lenders may offer longer, but these products are typically limited and may come with different pricing and conditions.

The maximum fixed period that makes sense for you will depend on your circumstances, how long you expect to stay in the property, and how comfortable you are with the possibility of being on a higher rate if market rates fall.

Fixed-rate vs variable-rate: how deal length fits in

A fixed-rate mortgage is only one part of the decision. You also need to consider what happens after the fixed period ends.

• During the fixed period, your interest rate is set for the agreed deal length.
• When the fixed period ends, you’ll typically move onto the lender’s standard variable rate (SVR) or another rate arrangement, unless you remortgage.

If you’re considering a variable-rate mortgage, the main difference is that your interest rate can change over time. That can mean lower payments if rates fall, but higher payments if rates rise.

Factors that can influence the right fixed term for you

Choosing a deal length isn’t just about what’s available—it’s about what you’re likely to need.

Common factors include:

• How long you expect to stay in the property
• Your plans for moving or remortgaging (including whether you might need to change your mortgage structure)
• How sensitive your budget is to payment changes
• Your view on interest rate risk (whether you prefer certainty or flexibility)
• The potential impact of early repayment charges if you switch before the end of the fixed term

Key takeaway

Fixed-rate deal lengths in the UK typically range from 1 year (rare) to 10 years (less common), with 2 and 5 years being the most widely used options. The “best” choice usually depends on your time horizon, how much payment certainty you want, and how likely you are to remortgage or move before the fixed period ends.

If you’re comparing options, it can help to focus on the full picture: the fixed period, what happens when it ends, and the costs and implications of switching early.