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What will Brexit mean for interest rates?

Find out how leaving the EU could affect savings and mortgage rates

Interest rates have been held at 0.75% in governor Mark Carney’s final base rate meeting.

This means interest rates have stayed the same since August 2018. But with Brexit on the way, that could soon change.

Changes to interest rates can have far-reaching consequences, on everything from your personal finances to the wider economy.

The Bank of England sets interest rates, also known as the base rate, in response to current events and expected economic performance, with the aim of keeping inflation around its 2% target.

In the past, holding rates has been described as a ‘wait-and-see’ approach to Brexit. But with Brexit fully underway, the Bank might have to change course this year.

So what will it do, and what will its decision mean for you?

Why the Bank of England base rate matters

Sometimes known simply as the interest rate, the Bank of England base rate influences how much banks and other lenders charge you to borrow money, and how much interest is paid on your savings.

In the case of a base rate rise, banks will tend to raise mortgage interest rates as well as loans, pushing up the cost of borrowing money. At the same time, interest rates on savings are also likely to increase, meaning your savings pot could grow a little faster.

Lowering the base rate could have the opposite effect, with mortgage rates becoming slightly cheaper, but savings deals offering lower returns.

After August’s growth figures revealed the UK economy shrank by 0.2% – the first contraction since 2012 – many in the City called for a rates cut to increase spending and stimulate growth. The MPC did not bow to this pressure, and the base rate was kept the same in September.

Factors that influence the base rate

When setting interest rates, the MPC’s goal is to keep inflation as close to 2% as possible. Its decisions are informed by an inflation forecast, which takes into account:

  • the current inflation level
  • wage growth
  • the cost of goods (including the impact of changes in the exchange rate)
  • consumer spending
  • investment levels

Interest rate decisions also consider unemployment rates and economic growth figures – the latter of which must not exceed a 1.5% ‘speed limit’ or inflation could rise above target.

The Bank of England puts it like this: ‘Overall, we know that if we lower interest rates, this tends to increase spending and if we raise rates this tends to reduce spending. So, to meet our inflation target, we need to judge how much people intend to save and spend given the current interest rates.’

Timeline: interest rates since the Brexit referendum

As Brexit looms on the horizon, you might wonder how this unprecedented political event might affect the economy. While no one has a crystal ball, it can be helpful to look at what happened to the base rate during the past two years of Brexit votes and negotiations.

August 2016: Just over a month after the referendum on EU membership, the Bank of England cut the base rate in half – from 0.5% to 0.25%. This was the first time the interest rate had changed since March 2009.

Interest rates were already at a historic low before this reduction. In the wake of the 2008 financial crisis, the base rate fell dramatically from 5% to 0.5%, where it remained for almost a decade.

November 2017: the MPC restored the base rate to pre-referendum levels in order to combat rising inflation. The Bank linked this decision directly to Brexit, saying ‘the fall in the pound following the Brexit vote’ means that things from abroad cost more, ‘and that means higher prices in the shops’.

August 2018: The MPC raised interest rates from 0.5% to 0.75% – the first rise above 0.5% in almost a decade. This decision was based on the economy’s steady growth, and the accompanying report noted that most referendum-related price hikes appeared to have happened already.

March 2019: Just over a week before the UK’s original EU exit date of Friday 29 March, the MPC voted to keep interest rates at 0.75% once again, citing low unemployment and inflation almost exactly on target at 1.9%. Minutes from the group’s meeting did, however, discuss the negative effect Brexit could have on businesses.

January 2020: The MPC kept interest rates at 0.75%, with seven of nine members voting this way. The remaining two voted to cut the base rate to 0.5%, but they were overruled by the majority. This could be the first sign that a rates cut is on the way. Though there’s no guaranteeing that this is the case.

What decision-makers have said about post-Brexit interest rates

The MPC tends to let its decisions do the talking, rarely revealing what those might be ahead of time. So far, it has taken a ‘wait and see’ approach to Brexit, meaning we might not see any base rate changes until after we leave the EU.

Still, key decision-makers have hinted at what form post-Brexit monetary policy could take:

Mark Carney, governor of the Bank of England

Since the referendum, Carney has been adamant that interest rates could go up or down after Brexit, depending on the circumstances. This was summed up when he said ‘it’s not automatic which way policy would go in the event of a hard Brexit’ at last January’s World Economic Forum.

However, at the end of June, he told the Commons Treasury committee that a no-deal Brexit could likely lead the Bank to cut rates.

Now he’s leaving, all eyes are on his replacement, Andrew Bailey, who will take over on 16 March 2020.

Gertjan Vlieghe, MPC member

Speaking to the Treasury Select Committee late in February, Vlieghe went slightly further than Carney, saying ‘just because [interest rates] could go in either direction, doesn’t mean that each one is equally likely’.

The rate-setter supported Carney’s point that any interest rate decisions will have to be made in real time, after the committee can see what impact Brexit has had.

Despite this, Vlieghe did outline how a likely fall in the pound’s value could lead to higher inflation, which would require the MPC to take action.

In mid-July he said a no-deal Brexit could see rates cut to almost zero: ‘I think it is more likely that I would move to cut Bank Rate towards the effective lower bound of close to 0% in the event of a no-deal scenario.’

The monetary policy committee (MPC)

In May’s inflation report, the MPC, which includes Vlieghe and Carney, said: ‘Whatever form Brexit takes, we will keep inflation low and support the economy.’

As we saw in 2017 and 2018, the MPC can opt to increase the base rate when they want to lower inflation. However, there will be other factors, such as a potential lack of consumer and business confidence, that the Bank will have to contend with after Brexit.

Minutes from June’s MPC meeting said rates would gradually rise ‘were the economy to develop broadly in line with its May Inflation Report projections that included an assumption of a smooth Brexit.’

In November’s and January’s decision, two MPC members voted against keeping the base rate at 0.75%, suggesting at least some members think it’s time for a change in tactics. If more members join the dissenters, we could see rates change soon.

What economists say about interest rates post-Brexit

Rocio Concha, chief economist at Which?

‘It’s clear that the political uncertainty surrounding Brexit is preventing the Bank of England from raising rates beyond their current level. In the medium term though, the Bank’s intention is still to gradually increase rates closer to their pre-recessionary norms – but only if the UK’s departure from the EU goes smoothly.

In the event of a no-deal Brexit, we expect that the most likely response is for rates to fall in order to stimulate a weakened economy. But, as the Bank says, that is by no means certain. A fall in the value of the pound will undoubtedly lead to higher prices and the Bank may find itself in a difficult position, balancing economic stimulus with tackling inflation.’

Ben Brettell, senior economist at Hargreaves Lansdown

Brettell told Which? Money: ‘The Bank of England has been setting a neutral tone as Brexit approaches. The minutes of recent meetings reiterate that the MPC still sees the need for higher interest rates in the coming years, but a deteriorating global growth outlook and mounting Brexit uncertainty have put paid to any thoughts of tighter policy for now.’

What can you do to prepare?

If the Bank of England base rate does change after Brexit, the key things that might be affected are your mortgage and your savings.


For savings, a base rate rise could see your account’s interest rate increase, giving you better returns. On the other hand, if the base rate is cut, you might see your interest fall.

Switching to a fixed-rate account will secure you against any potential Brexit turmoil, but you’ll miss out on the possible benefits of a base rate rise.

If you’re thinking of switching, you can compare hundreds of savings accounts at Which? Money Compare to find the best home for your nest egg.


Variable-rate and tracker mortgage customers could face higher repayments if the base rate rises. If you’re worried about this, you could remortgage to a fixed-rate deal in order to secure cheaper repayments for a set period.

However, if the base rate is lower, variable rate borrowers may see their repayments become cheaper. You’ll miss out on this if you’re on a fixed rate.

Which? Limited is an Introducer Appointed Representative of Which? Financial Services Limited, which is authorised and regulated by the Financial Conduct Authority (FRN 527029). Which? Money Compare is a trading name of Which? Financial Services Limited.

Please note that the information in this article is for information purposes only and does not constitute advice. Please refer to the particular terms & conditions of a provider before committing to any financial products.

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