UK Inflation Hits 3.5%: What It Means for Your Money

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UK inflation jumped to 3.5% in the 12 months to September 2026, up from 3.1% in August, according to figures published by the ONS this morning. It's the highest rate since October 2025, and fuel is the main culprit. For your money, three things follow: cash earning less than 3.5% is now losing value in real terms, a Bank of England rate rise on 5 November looks more likely, and September's figure sets how much many benefits rise next April.

Here's what changed, who it affects, and the practical steps worth taking before the Budget on 28 October.

What did the September 2026 inflation figures show?

The headline numbers from the ONS:

The biggest push came from transport, particularly motor fuels. Motor fuel prices were 29.8% higher than a year earlier (up from 23.0% in August), with petrol averaging 169.5p a litre and diesel 192.5p. The ONS's chief economist said the cost of diesel was the highest since July 2022. Higher air fares added to it. The largest drag in the other direction came from restaurants and hotels, where inflation eased to 3.8%.

Food is the one bright spot for now at 1.3%, its lowest since 2021. Don't bank on that lasting: the ONS notes industry warnings that food price rises tend to "arrive later and persist for longer" after a fuel shock.

Is inflation going to keep rising?

Probably, for a while. Forecasts quoted by MoneyWeek have the Bank of England expecting inflation to average around 3.75% in the final quarter of 2026 and around 4% in early 2027. Cornwall Insight expects household energy bills to rise by about 16% in January 2027, which would feed straight into the figures.

Take Action: If your budget has felt tighter since the summer, it isn't your imagination. Re-run your monthly numbers with fuel and energy at their new levels. Our UK Budget Planner is built for exactly this.

Will the Bank of England raise interest rates in November?

Bank Rate is currently 3.75%. At the September meeting, the Monetary Policy Committee voted 6-3 to hold, with three members (Megan Greene, Catherine Mann and Huw Pill) already voting to raise it to 4%. The Committee said the risks to inflation were "tilted to the upside", and that was when inflation was 3.1%.

The next decision is due on 5 November 2026. With inflation now well above the Bank's 2% target and still climbing, many economists expect a rise. Schroders' David Rees said a November hike "now looks like a done deal". Nothing is certain until the vote, but it's sensible to plan as if rates go up by 0.25 percentage points.

What does 3.5% inflation mean for my savings?

Inflation is the line your savings need to beat. If your cash earns less than 3.5%, it buys less each year even though the balance goes up.

A simple example with £10,000 over a year at 3.5% inflation:

The good news is that beating inflation is still possible with cash. According to Moneyfacts data reported this morning, the average savings account pays around 3.8%, and 1,683 accounts were paying more than inflation. The catch is that many people leave money in accounts paying far less than average, and banks are rarely quick to tell you.

Where to look for a better rate

• Easy-access savings with your bank app. If you bank with Monzo, its savings pots let you move money out of your spending balance in a couple of taps. Check the current rate in the app against the 3.5% benchmark before moving money: app-bank rates change often and differ by plan.
• A cash ISA. Interest inside an ISA is tax-free. That matters more as rates rise, because more savers will exceed their Personal Savings Allowance.
• Investment platforms that pay interest on cash. Trading 212 offers a Cash ISA and pays interest on uninvested cash, alongside commission-free investing. As with any provider, compare its current rate on the day; we couldn't verify today's rate before publishing, so we haven't quoted one.

If an interest rate rise comes in November, savings rates will tend to edge up too, but rarely by the full amount and rarely on old accounts. Whatever happens, check what your existing savings are paying.

Take Action: Log in to every savings account you have and write down the rate. Anything below 3.5% is losing value in real terms. Make sure your emergency fund is in an easy-access account that pays at or near the best rates, not your current account.

What does it mean for my mortgage?

It depends on the type of mortgage you have:

• Fixed rate: Nothing changes until your deal ends. If that's within the next six months, many lenders let you secure a new deal in advance, so it can pay to look now rather than after 5 November.
• Tracker: Your rate moves with Bank Rate, usually within a month or so of a change.
• Standard variable rate (SVR): Lenders often (but don't have to) pass on rises.

To give a sense of scale: on a £200,000 repayment mortgage over 25 years, a 0.25 point rise from 5.00% to 5.25% adds roughly £29 a month (from about £1,169 to £1,199). Lenders also price new fixed deals off market expectations, so fixed rates can rise before the Bank actually moves.

If you're weighing up overpayments now, the maths shifts slightly as savings rates rise. Our guide on whether to overpay your mortgage walks through it. Mortgage choices depend heavily on your circumstances, so a regulated broker or adviser is worth talking to before you lock in.

Take Action: Find your current deal's end date and rate today. If it ends in the next six months, get a broker quote this week.

How does September's inflation affect pensions and benefits?

September's CPI matters beyond this month because it's used in setting payments next April.

• State Pension: Under the triple lock, the State Pension rises by the highest of earnings growth, September CPI or 2.5%. Earnings growth came in higher than 3.5% this year, so the State Pension is expected to rise by 3.9% from April 2027. MoneyWeek estimates that would take the full new State Pension from about £241 a week to about £250 a week. The government confirms the figure at the Budget.
• Working-age benefits: September CPI is the figure the government normally uses to uprate working-age benefits and tax credits, so 3.5% is the likely starting point for April 2027. This also needs confirming by the government.

What could the 28 October Budget change?

The Budget will be held on 28 October 2026, one week from today. Which? reports that the personal allowance will be reviewed and that a further increase to the Warm Home Discount is being considered, though nothing is confirmed until the day.

One change savers should already know about: the 2025 Budget announced that the amount you can put into a cash ISA will fall from £20,000 to £12,000 from April 2027, with over-65s keeping the full allowance (City AM). The overall £20,000 ISA allowance stays, so the rest can still go into a stocks and shares ISA. Unless next week's Budget changes this, the current tax year (to 5 April 2027) is the last chance for most under-65s to put a full £20,000 into a cash ISA.

We'll update this post after the Budget.

Should I move savings into investments because of inflation?

Not automatically. Cash and investments do different jobs:

• Cash is for your emergency fund and anything you need in the next few years. It's safe (up to the FSCS limit per banking group) but struggles to beat inflation for long periods.
• Investments such as global index funds have historically grown faster than inflation over long periods, but they can fall sharply in the short term. They suit money you won't need for at least five years.

If you've built your emergency fund and have longer-term money sitting in cash, a low-cost stocks and shares ISA is one way to give it a better chance of beating inflation. Two platforms worth a look:

Capital at risk - the value of investments can go down as well as up, and you may get back less than you invest. Check each provider's site for its current welcome offer, as referral bonuses change often.

For a fuller comparison, see our guide to the best stocks and shares ISAs and our Trading 212 ISA review. Whether investing is right for you depends on your goals and attitude to risk; if you're unsure, our personal finance review can help you think it through.

Take Action: Decide how much of your cash is genuinely "emergency" money. Keep that in the best easy-access account you can find, and consider whether the rest belongs in a tax-free wrapper before April.

What should I do now? A five-step checklist

1. Check every savings rate you have against 3.5% and move anything earning well below it.
2. Use your ISA allowance, especially the cash ISA portion before the expected April 2027 cut.
3. Find your mortgage end date and get a quote if it's within six months.
4. Rebuild your budget for higher fuel and, from January, likely higher energy bills.
5. Watch two dates: the Budget on 28 October and the Bank of England decision on 5 November.

FAQ

What is the UK inflation rate now?

CPI inflation was 3.5% in the 12 months to September 2026, up from 3.1% in August. The next figures, for October, are due on 18 November 2026.

When is the next Bank of England interest rate decision?

The next decision is due on 5 November 2026. Bank Rate is currently 3.75%, and three of the nine Committee members voted for a rise in September.

How much will the State Pension rise in April 2027?

It's expected to rise by 3.9% under the triple lock, because earnings growth was higher than September's 3.5% inflation. The government confirms the exact figure at the Budget on 28 October.

Is my money safe in a savings account if banks change rates?

Rate changes don't affect safety. Deposits with UK-authorised banks are protected by the FSCS up to the limit per person, per banking group. Check that your money is spread across separate banking groups if you're above it.

Does inflation affect my tax?

Indirectly. Many tax thresholds are frozen, so as wages rise with inflation, more of your income is taxed at higher rates. Higher savings rates also mean more people go over their Personal Savings Allowance, which is one reason ISAs matter more now.

The bottom line

At 3.5%, inflation is back to a level where doing nothing with your cash costs you money. The fixes are mostly simple: get your savings rate above inflation, use your ISA allowance while the full cash limit lasts, and know when your mortgage deal ends. With the Budget and a likely rate decision in the next fortnight, it's a good week to get these sorted.

If you're starting from scratch, a clear budget is the first step: try the UK Budget Planner. And if you're ready to make your savings work harder, Trading 212 and InvestEngine are both worth comparing (capital at risk).

This article is for information only and isn't personal financial advice.