Should I Lock In a Mortgage Rate Now or Wait?

If your fixed rate is ending in the next six months, or you are part way through buying a home, you have probably asked yourself the same question half a dozen times already. Do you lock something in now, or do you hang on and hope?

It is the question we are asked more than any other at the moment. Rates have been moving the wrong way since the summer, and nobody enjoys committing to a deal the week before everything gets cheaper. Equally, nobody enjoys watching a good rate disappear while they think about it.

So here is a straight answer, or as straight as anyone can honestly give you. There is no way to time the market perfectly. But there is a way to give yourself options, and most people do not realise they have it.

What has actually happened to mortgage rates

The Bank of England held the base rate at 3.75% on 17 September 2026. The Monetary Policy Committee voted 6 to 3 to hold, with three members wanting to raise it to 4%. That is a meaningful split. CPI inflation rose to 3.1% in August, up from 2.9% in July, and the Bank said inflation is likely to rise further over the coming quarters.

Despite the hold, fixed mortgage rates have gone up. According to the HomeOwners Alliance, as of 5 October 2026 the average two year fixed rate sits at 5.98%, the average five year fix at 6.00%, and the average standard variable rate at 7.13%.

Several lenders repriced in early October. Barclays moved its two year fix from 4.75% to 5.05% and its five year fix from 4.93% to 5.03%. HSBC made changes of up to 0.33 percentage points. Halifax made selected increases of up to 0.11 percentage points. Hodge and West Brom moved by between 0.50 and 0.57 percentage points.

It is worth saying that it has not been one way traffic. In the same period NatWest, Skipton and Santander made selected cuts of up to 0.29 percentage points. Different lenders have different funding positions and different appetites for business at any given moment, which is exactly why looking at one lender's rates tells you very little.

Why a base rate hold did not make mortgages cheaper

Fixed rate mortgages are not priced off the base rate. They are priced off swap rates, which is roughly what it costs a lender to borrow money for a fixed period in the wholesale markets. Swap rates move on what the market expects to happen next, not on what has just happened.

So when the Bank held in September but signalled that inflation was heading higher, the market did not read that as good news. It read it as a sign that the next move is more likely to be up than down. Swap rates rose, and lenders repriced their fixed deals accordingly.

Financial markets are currently pricing in roughly four quarter point rises by the end of 2027. The next Bank of England decision is on 5 November 2026. Governor Andrew Bailey has been clear that rises are not inevitable and that the outlook depends on how the economy and global events develop, so none of this is settled.

The practical takeaway is simple. Waiting for the Bank of England to announce something before you act is usually too late, because the mortgage market has already moved on the expectation weeks earlier.

How early can you lock in a rate?

If you are remortgaging

Most lenders will let you secure a new deal around six months before your current one ends. Some allow slightly less, a few allow a little more. The new rate is reserved for you and the mortgage completes when your existing deal expires, so there is no overlap and no early repayment charge.

If your deal ends in March, you can typically be looking now. If it ends in December, you should already be looking. Our guide on what to do six months before your deal ends walks through the full timeline.

If you are buying

A mortgage offer, once issued, is usually valid for three to six months depending on the lender. That protects your rate while the purchase goes through. The rate is generally fixed at the point the offer is issued rather than the point you complete, which matters a great deal in a rising market.

If you are at the start of the process, our first time buyer advice page covers what to have ready so you are not slowed down by paperwork at the wrong moment. Home movers can find the equivalent on our home mover page.

What happens if rates fall after you lock in

Here is the part most people do not know, and it is the most useful thing in this article.

Securing a rate early is not usually a one way door. In most cases, if rates fall between the day you reserve a deal and the day it completes, you can switch to the cheaper product. Lenders handle this differently, and the window and the process vary, but the principle holds across a lot of the market.

That changes the question entirely. You are not really choosing between locking in now and waiting. In a lot of cases you are choosing between having a rate secured with the option to improve on it, or having nothing secured at all.

Some important caveats, because this is where the detail matters:

• Not every lender offers this, and the ones that do set their own cut off points, often a set number of days before completion.
• Switching product may mean a new application or a fresh affordability assessment with some lenders.
• If the cheaper deal is with a different lender entirely, that is a new application rather than a product switch, and timing becomes tighter.
• The deal you reserved has to still be available to you when you want to swap, and criteria can change.

This is genuinely one of the areas where having someone watching the market on your behalf earns its keep. We hold the reservation, keep an eye on what comes out afterwards, and move you if something better appears and the lender allows it. You should not have to monitor rate tables yourself.