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

How long should you fix your mortgage for?

If you’re shopping for a new mortgage, one of the biggest decisions is the length of the fixed-rate period. A fixed rate can give you budgeting certainty, but the “right” deal length depends on your plans, your tolerance for change, and how costly it would be to leave early.

In this guide, we look at the most common fixed-rate options—1, 2, 3, 5 years and beyond—and what to consider before choosing.

Fixed-rate mortgage deal lengths: what’s available?

In the UK, fixed-rate mortgages are typically offered for a set number of years. The most commonly discussed options are:

• 1-year fixes (less common)
• 2-year fixes (common)
• 3-year fixes (available, but less common than 2 and 5)
• 5-year fixes (common)
• 10-year fixes (available, but less common than shorter fixes)

You may also see other lengths depending on lender availability.

It’s also worth noting that the way a deal is described isn’t always the same as how long it runs in practice—some fixed deals have end dates that don’t exactly match the “named” number of years. Always check the offer paperwork so you understand the precise end of the fixed period.

The key trade-off: certainty now vs flexibility later

Choosing a fixed period is usually a balance between:

• Stability: your interest rate (and therefore your payment) stays the same for longer.
• Flexibility: you have more opportunities to refinance if rates move in your favour.
• Cost of leaving early: if you remortgage before the fixed period ends, you may face early repayment charges (ERCs).

A shorter fix can be helpful if you expect to move or want the option to refinance sooner. A longer fix can suit borrowers who prioritise predictable payments and want to reduce the need to make decisions in the near term.

Should you fix for 2 years or 5 years?

2-year fixed-rate mortgages

A 2-year fix is often chosen because it offers a middle ground between stability and flexibility.

Potential advantages

• You may be able to remortgage sooner if your circumstances change or if you want to take advantage of better deals.
• If you’re planning a move within a couple of years, it can align with your timeline.

Potential disadvantages

• If rates rise after you remortgage, your payments could increase when the fixed period ends.
• In some cases, shorter fixes may not always be the cheapest option—so it’s important to compare the overall cost, not just the headline rate.

5-year fixed-rate mortgages

A 5-year fix is designed for longer-term budgeting certainty.

Potential advantages

• Your rate is locked for longer, which can make monthly costs easier to plan.
• You typically won’t need to remortgage as often, which can reduce the frequency of decision-making and associated costs.

Potential disadvantages

• If rates fall and you want to remortgage during the fixed period, ERCs may make it more expensive to switch.
• If you decide you need to move or refinance before the end of the fixed term, you may have to weigh the cost of leaving against the benefit of switching.

Can you fix your mortgage for 1 year?

A 1-year fixed-rate mortgage is possible, but it’s less common than other deal lengths. Where it is available, pricing and terms can vary.

Why someone might consider it

• If you expect interest rates to move in your favour and you want to review options sooner.

Why it can be risky

• With a shorter fixed period, you’re exposed sooner to what happens after the deal ends.
• If rates rise, you may face higher payments when you come to remortgage.

Because availability and pricing can vary, it’s important to compare the full cost implications—not just the headline rate.

Should you fix for 10 years?

A 10-year fixed-rate mortgage can be an option for borrowers who want long-term certainty.

Potential advantages

• You can plan around your interest rate for a decade.
• It may suit borrowers who want to minimise the number of times they need to refinance.

Potential disadvantages

• If rates fall, you could end up paying more than you would on a newer, lower-rate deal.
• Leaving early may be costly due to ERCs.

In general, longer fixes can be priced differently because lenders take on more interest-rate risk over a longer period.

What’s the maximum time you can fix?

For many borrowers, 10 years is the longest fixed deal length you’ll typically see. Some lenders may offer longer fixed periods, but these are not as common and may come with more specific conditions.

If you’re considering an unusually long fix, it’s especially important to understand:

• how ERCs work if you remortgage early
• whether you can make overpayments and how that affects the deal
• how the fixed period end date is defined

How ERCs and remortgaging can affect your decision

When you fix your mortgage, you’re not only choosing a rate—you’re also choosing how expensive it could be to change course.

Before selecting a deal length, consider:

• ERCs: the cost of repaying or refinancing during the fixed period.
• Remortgaging timing: whether you’re likely to refinance at the end of the fixed term or earlier.
• Moving plans: if you might relocate, renovate, or change your income, the “best” deal length may be different.

Even if a longer fix gives you stability, it may not be ideal if you realistically expect to remortgage within that period.

Fixed vs variable: how deal length fits into the bigger picture

A fixed-rate mortgage is one way to manage risk, but it isn’t the only approach. Some borrowers consider variable-rate mortgages as an alternative.

In general:

• Fixed-rate mortgages offer payment stability during the fixed period.
• Variable-rate mortgages can change over time, which means payments may rise or fall depending on market conditions.

The right choice depends on your budget, your plans, and how comfortable you are with payment uncertainty.

Practical checklist: choosing the right fixed period

When comparing fixed-rate deal lengths, it helps to look beyond the headline figure and focus on the details that affect your total experience:

• Your likely timeline: how long you expect to stay in the property.
• Your remortgaging flexibility: whether you might want to switch before the fixed period ends.
• ERCs and exit costs: what it could cost to leave early.
• The exact end date: confirm how the fixed period is defined in the offer.
• Your overall affordability: consider how payments could look if rates change after the fixed term.

Summary

There’s no single “best” fixed period for everyone. Shorter fixes (like 2 years) can offer more flexibility, while longer fixes (like 5 or 10 years) can provide stronger payment certainty. The most suitable deal length is usually the one that matches your plans and keeps the cost of any potential early exit within your comfort level.