When you take a fixed-rate mortgage, you must decide how long to fix for, commonly two or five years, though other lengths exist. The right choice depends on your priorities and circumstances. This guide explains how long to fix your mortgage: the trade-offs of shorter and longer fixes, and how to decide.
The decision
Fixing your rate means choosing a period over which it stays the same, typically two or five years, but sometimes three, ten or even longer. A shorter fix lets you review sooner, while a longer fix gives certainty for longer but ties you in. The decision balances how much certainty you want against the flexibility to change, as our guide to fixed versus variable rates explains.
The case for a shorter fix
A shorter fix, such as two years, lets you review your mortgage sooner, perhaps to take advantage of falling rates or changing circumstances, and ties you in for less time, with shorter early repayment charges. The trade-off is that you face the uncertainty of remortgaging again sooner, when rates may be higher. A shorter fix suits those who value flexibility or expect their situation to change before long.
The case for a longer fix
A longer fix, such as five years, gives certainty over your payments for longer, protecting you from rate rises and saving the effort and cost of remortgaging as often. The trade-offs are that you will not benefit if rates fall, and you are tied in for longer, with early repayment charges over the whole period if you need to leave early, as our guide to early repayment charges explains.
Your circumstances matter
Your plans are central to the decision. If you might move, repay, or change your mortgage within a few years, a shorter fix or one with porting avoids being locked in. If you want stability and expect to stay put, a longer fix gives lasting certainty. Matching the fixed period to how settled your life and finances are, as our guide to fixing for first-time buyers explains, helps avoid costly early exits.
The current rate context
Rates affect the choice too. In mid-2026, five-year fixes have at times been priced similarly to or below two-year fixes, which can make a longer fix relatively attractive, though this varies. Where a longer fix is not much dearer, the extra certainty can be good value. Comparing the rates on offer for different lengths, alongside your circumstances, helps you judge which fixed period suits you best.
Early repayment charges and length
The longer you fix, the longer you are subject to early repayment charges if you leave early, and on a five-year fix these can be larger in the early years. So a longer fix locks in your rate but also locks in a longer period during which exiting would be costly. If there is a real chance you will need to leave, this is an important consideration in choosing the length.
Other fixed periods
Beyond two and five years, some lenders offer three-year, ten-year, or even longer fixes, including some that last the whole mortgage term. A very long fix gives extended certainty but ties you in for a long time, while a three-year fix is a middle ground, as our guide to capped and flexible mortgages notes for alternatives. The range of options means you can often find a fixed period that matches your needs.
Certainty versus keeping options open
At its heart, the choice is between locking in certainty and keeping your options open. A longer fix gives more years of guaranteed payments but less freedom to change; a shorter fix gives more freedom but less certainty. Neither is simply better. Deciding how much you value knowing your payments for longer, against the flexibility to react to changes, is the core of the decision.
If you might move
If you might move home within a few years, a shorter fix, or one that is portable, avoids being locked in with an early repayment charge when you move, as our guide to moving during a fixed-rate deal explains. While porting can let you take a fix with you, not all moves allow it, so a shorter fix can give helpful flexibility if a move is likely.
The remortgage hassle factor
A longer fix means remortgaging less often, saving the effort and any costs of switching every couple of years. For those who find remortgaging a chore, a five-year fix reduces how often they must do it. A shorter fix means more frequent reviews, which gives more chances to find a better deal but also more admin. How much the hassle matters to you is a fair part of the decision.
Splitting the difference
Some borrowers split their mortgage, fixing part for a shorter period and part for longer, or choose a three-year fix as a middle ground. These approaches blend the benefits of both. If you are torn between a two- and five-year fix, a middle option or a split can be a sensible compromise, giving some certainty while keeping some flexibility, as our guide to flexible mortgages notes.
No one can predict rates
It is worth remembering that no one can reliably predict where rates will go, so the choice is partly about managing uncertainty rather than guessing the future. Fixing for longer protects you if rates rise but costs you if they fall, and vice versa. Because the future is unknowable, many people choose the length that gives them the certainty they need, rather than trying to outguess the market.
How settled is your life?
A useful question is how settled your life and finances are. If you expect stability, staying in the same home with steady income, a longer fix locks in certainty with little downside. If change is likely, a new job, a move, or a growing family, a shorter or portable fix avoids being tied down. Matching the fixed period to how predictable your next few years look is one of the most practical ways to decide.
Make the decision your own
Ultimately, how long to fix is a personal decision based on your priorities, not a one-size-fits-all answer. Some value certainty above all and fix for longer; others prize flexibility and fix for less. Neither is wrong. Thinking honestly about what matters most to you, certainty, flexibility, or a balance, and the rates on offer for each length, leads to a choice you will be comfortable with, as our guide to fixed versus variable explains.
Whatever length you settle on, the habit that matters most is to review your mortgage as the deal nears its end and switch to a competitive new one, so you never drift onto the standard variable rate regardless of how long you chose to fix.
In short
How long to fix balances certainty against flexibility. A shorter fix, such as two years, lets you review sooner and ties you in for less time, while a longer fix, such as five years, gives lasting certainty but locks you in, with no benefit if rates fall and longer early repayment charges. Your plans, the rates on offer, and how settled you are should guide the choice, and other lengths exist too.
Where to get help and next steps
Read our guides to choosing between fixed and variable, fixing for first-time buyers, and capped and flexible mortgages. This is general information, not mortgage or financial advice.