The Bank of England base rate is often in the news, and it affects mortgages, but how it does so depends on the type of deal you have. This guide explains how the base rate affects your mortgage: what it is, how it feeds through to different deals, and what to do when it changes.
What the base rate is
The Bank of England base rate is the official interest rate set by the Bank's Monetary Policy Committee, influencing the cost of borrowing across the economy. It is reviewed at regular meetings and can be raised, lowered or held. In mid-2026 the base rate is 3.75%. Changes to the base rate ripple through to savings and borrowing, including mortgages, though the effect on your mortgage depends on your deal.
How it affects trackers
Tracker mortgages are most directly affected, because they follow the base rate plus a set margin, as our guide to trackers explains. If the base rate changes, a tracker rate changes by the same amount, usually within a month, so your payments rise or fall directly with the base rate. This direct link is the defining feature of a tracker, making the base rate central to tracker borrowers.
How it affects the SVR and discounts
The standard variable rate is influenced by the base rate but set by the lender, so it does not have to move in step, as our guide to the standard variable rate explains. A discount, being a set amount below the SVR, follows the lender's SVR. So base rate changes may affect these rates, but at the lender's discretion rather than automatically, making them less predictable than a tracker.
How it affects fixed rates
If you have a fixed-rate mortgage, base rate changes do not affect you during your deal, since your rate is locked in, as our guide to fixed versus variable explains. However, the base rate influences the new deals available when you remortgage. Notably, fixed rates are priced more from swap rates than directly from the base rate, which is why fixes can move even when the base rate is unchanged.
How changes feed through
When the base rate changes, the effect feeds through differently by deal: trackers change almost immediately, the SVR and discounts may change at the lender's discretion, and fixed rates are unaffected until you remortgage. So a single base rate change affects different borrowers in different ways and at different times. Knowing which type you have tells you whether and when a base rate change will affect your payments.
What to do when it changes
If the base rate rises and you are on a tracker or variable rate, your payments may increase, so it is worth checking you can afford them and considering whether to fix. If it falls, you may benefit, or it may be a good time to review deals. If you are on a fix, a change does not affect you now but may shape your options at remortgage, as our guide to when to remortgage explains.
The wider picture
The base rate is one of several factors affecting mortgage rates, alongside swap rates, lender competition and the wider economy. So mortgage rates do not always move exactly with the base rate, especially fixed rates. Keeping an eye on the base rate helps you understand your tracker or variable payments and anticipate the deals available at remortgage, but it is not the only influence on what you pay.
Why the Bank changes the base rate
The Bank of England changes the base rate mainly to manage inflation and support the economy. Raising the rate tends to cool spending and inflation, while cutting it tends to encourage borrowing and growth. These decisions are made at regular meetings based on economic conditions. Understanding that the base rate is a tool for managing the economy helps explain why it moves and why the outlook can be uncertain.
The lag before changes take effect
When the base rate changes, the effect on your mortgage is not always immediate. Tracker rates usually change within a month, but the broader economic effects, and lenders' decisions on SVRs and new fixed rates, can take longer to feed through. So a base rate change may not alter your payments straight away, depending on your deal, which is worth bearing in mind when one is announced.
An example of a tracker change
Suppose you have a tracker at base plus 0.6%, paying 4.35% with the base rate at 3.75%. If the Bank cut the base rate by 0.25%, your rate would fall to 4.1%, lowering your payments, usually from the following month. If it raised the rate instead, your payments would rise. This shows how directly and promptly a tracker responds to base rate decisions, for better or worse.
Base rate and fixed deals at remortgage
Even though a fixed deal is unaffected by base rate changes during its term, the base rate, and the swap rates it influences, shape the deals available when you remortgage, as our guide to the best time to remortgage explains. So if you are coming up to remortgage, the rate environment matters, which is why it is worth watching rates as your deal-end approaches.
Focus on what you can control
Since you cannot control or reliably predict the base rate, it is best to focus on what you can control: choosing a deal type that suits your risk tolerance, borrowing affordably, keeping a buffer for possible rises, and remortgaging in good time. Worrying about every base rate movement is less useful than ensuring your mortgage is resilient to changes, whichever way the base rate goes.
Keeping perspective on rate news
Base rate decisions and predictions feature heavily in the news, which can cause anxiety, but it helps to keep perspective. If you are on a fix, changes do not affect you now; if you are on a tracker or variable rate, a single change usually alters your payment modestly. Reacting calmly, and reviewing your position when your deal ends or if rises would strain your budget, is more useful than worrying about every announcement.
Planning for rate rises
Whatever your deal, it is wise to consider how you would cope if rates rose, by keeping a buffer in your budget or stress-testing your finances against higher payments. This is especially important on a tracker or variable rate, where payments can increase. Planning for the possibility of higher rates, rather than assuming they will stay low, makes your finances more resilient, as our guide to how mortgages work notes on affordability.
In short
The Bank of England base rate, 3.75% in mid-2026, affects mortgages differently by type. Trackers follow it directly, so their payments move with it. The standard variable rate and discounts are influenced by it but set by the lender. Fixed rates are unaffected during the deal but shape your remortgage options, and are priced more from swap rates. Knowing your deal type tells you how base rate changes affect you.
Where to get help and next steps
Read our guides to tracker mortgages, the standard variable rate, and fixed versus variable rates. This is general information, not mortgage or financial advice.