2-Year or 5-Year Fix? The 2026 Trade-Off in Numbers
Published 1 August 2026
If your fixed deal is one of the roughly 1.8 million ending in the UK during 2026, the real choice is usually between a 2-year and a 5-year fix. Right now the gap is small: on a £250,000 mortgage the best 2-year fix is about £1,338 a month and the best 5-year about £1,354, only around £17 more for locking the rate three years longer. The 2-year deal is cheaper today but re-prices in 2028, so it is really a bet on where rates land then. Both easily beat doing nothing and sliding onto a standard variable rate near 7%, which would cost about £1,788 a month.
How long should you fix your mortgage for?
The honest answer is that the term follows one question, and it is not about rates. How long do you expect to stay in this house, and how much does a payment that cannot move matter to you? Everything else is arithmetic on top of that.
Fix for 2 years if you expect to move, remortgage, or come into money inside that window, or if you think rates will fall and you want to catch it. Fix for 5 years if you are settled, if a payment you can plan around is worth something to you, or if you would rather not think about the 2028 market at all. On the numbers above the two routes sit about £17 a month apart today, which is the price of not having to guess.
Two things people get wrong when choosing the length. They fix long to avoid a decision, which works and costs an early repayment charge if life changes; and they fix short to chase a lower rate, without pricing the outcome where 2028 is worse rather than better. On the figures here that range runs from saving about £3,900 to paying about £5,600 over five years, so a two-year fix is a position on the 2028 market whether or not you meant to take one.
There is no term that is right in general. There is a term that matches how long you intend to stay and how much certainty you are willing to pay for, and those two facts are ones you already know.
How much does each fix cost right now?
In late July 2026 the best-buy rates at a low loan-to-value are close together: about 4.13% on a 2-year fix and about 4.25% on a 5-year. On £250,000 over 25 years that is roughly £1,338 against £1,354 a month, a difference of about £17. Market averages are higher, nearer 5.6%, and the rate you are offered moves with your deposit and any product fee, so a low headline rate with a big fee is not always the cheapest deal, all against a Bank of England base rate held at 3.75% on 30 July 2026.
Why is the 2-year fix a bet?
A 2-year fix hands you a lower payment now but sends you back to the market in 2028, when nobody knows the rate. Take the 4.13% deal, then re-fix the remaining balance for the next three years, and the five-year cost depends entirely on that future rate, and the range of outcomes is wide enough to matter. If rates fall to 3.5% the 2-year route saves about £3,900 over five years compared with taking the 5-year fix today, whereas if they hold near 4.25% the two routes finish within about £440 of each other, and if they climb to 5.5% the 2-year route ends up costing roughly £5,600 more, which is the wager you are making on the 2028 market.
When does a 5-year fix win?
A 5-year fix wins when you value certainty, expect to stay put, or think rates will hold or rise. For about £17 a month more you lock the payment through 2031 and stop worrying about the 2028 market. The trade-offs are early repayment charges if you move or repay early, and missing out if rates fall sharply. If a steady, predictable payment matters more than squeezing the last few pounds, the longer fix is the calmer choice.
When does a 2-year fix win?
A 2-year fix wins if you expect cuts, might move or overpay heavily soon, or want the freedom to re-fix at a lower rate in 2028, paying a little less now while keeping your options open. The cost is the re-fix risk shown above, plus a second set of arrangement fees in two years. Model both paths in the remortgage calculator before you commit, using your own balance and rate.
What about staying on the SVR?
The standard variable rate is the default you land on if you do nothing, and at about 7% it is the expensive option. On £250,000 it costs around £1,788 a month, roughly £433 more than a new 5-year fix. The only time it makes sense to sit on it briefly is when you are about to move or repay and want to avoid early repayment charges; otherwise, fixing at either length is the point, and the mortgage calculator shows the payment at any rate so you can see the gap for your own loan.
How to decide
Weigh four things: how much certainty you want, how long you expect to stay, your own view on rates, and the fees. If you cannot stomach a higher payment in 2028, fix for five years. If you are confident rates will ease, or you may move, a 2-year fix keeps you nimble. Either way, overpaying within your allowance cuts the balance you carry into the next deal, which you can test in the overpayment calculator.
A note on the figures
Rates are representative best buys at around 60% loan-to-value in late July 2026, with market averages from Moneyfacts. The figures use a £250,000 repayment mortgage over 25 years, and the re-fix scenarios are illustrations rather than forecasts. About 1.8 million fixed deals are due to end in 2026 according to UK Finance, and the Bank of England held its base rate at 3.75% on 30 July 2026 in a 6-3 vote, with the three dissenters preferring a rise. Confirm your own numbers with a regulated broker before deciding.