TL;DR: The Office for National Statistics releases April 2026 CPI inflation data on 20 May at 7:00am. Headline CPI in the year to March 2026 was 3.3 percent, up from 3.0 percent in February, driven by transport and motor fuels. The Bank of England's April Monetary Policy Report projects further inflation rise into Q3 2026. The next Monetary Policy Committee decision is 18 June. Savers, mortgage holders and investors should watch the 20 May data for the next signal on where the Bank Rate goes from its current 3.75 percent.
Last reviewed: 12 May 2026
The next UK inflation reading lands at 7:00am on Tuesday 20 May 2026, when the Office for National Statistics (ONS) publishes Consumer Prices Index data for April. The release is one of the most consequential economic data points in the UK calendar because it feeds directly into the Bank of England's Monetary Policy Committee deliberations and from there into the entire chain of UK savings, mortgage and government bond rates.
The March 2026 reading, published on 22 April, showed headline CPI at 3.3 percent in the 12 months to March, up from 3.0 percent in the 12 months to February. The increase was driven by transport, with motor fuels rising 4.9 percent in the year to March, the highest reading since January 2023. CPIH (CPI including owner-occupiers' housing costs) was 3.4 percent, up from 3.2 percent.
Why the 20 May release matters
The April data captures the period before the third energy price cap of 2026 takes effect on 1 July. It also captures the first full month of new tax year rates introduced on 6 April 2026, including changes to National Insurance, employer NI thresholds and tobacco duty. Both effects feed into the CPI basket and, depending on which dominates, can pull the headline rate in different directions.
The Bank of England's April Monetary Policy Report, published on 30 April, sets out the central case projection. The MPC expects CPI inflation to be 3.3 percent in Q3 2026, a 1.4 percentage point upward revision from the February Report. The revision reflects higher fuel prices linked to Middle East tensions, higher services inflation, and a re-evaluation of the persistence of energy price effects. The MPC voted 8 to 1 to hold Bank Rate at 3.75 percent at its 29 April meeting, with one member voting for a 0.25 percentage point increase.
What it means for savers
UK savings rates take their direction from the Bank Rate. If the 20 May CPI reading comes in above expectations, the case for the MPC to hold rates at 3.75 percent or even raise them at the 18 June meeting strengthens. That tends to support the higher-paying end of the savings market, particularly easy-access accounts and one-year fixed-rate bonds where banks compete most actively.
Cash ISAs follow the same direction but with the additional tax shelter for higher-rate taxpayers. With the personal savings allowance frozen at 1,000 pounds for basic-rate taxpayers and 500 pounds for higher-rate, the breakeven savings balance at which a cash ISA outperforms a taxable account has fallen significantly compared to pre-2024 levels. At 4.5 percent, a basic-rate taxpayer exceeds the PSA on roughly 22,000 pounds of savings; a higher-rate taxpayer on roughly 11,000 pounds.
What it means for mortgage holders
The mortgage market prices off swap rates, which themselves track expectations of where the Bank Rate will sit at different forward horizons. A hotter-than-expected CPI reading typically pushes two-year and five-year swap rates higher within hours, and that filters into mortgage lender pricing within days to weeks.
Around 1.5 million UK households are due to remortgage during 2026 off fixed deals taken out at lower rates between 2020 and 2022. For that cohort, the difference between a CPI reading at 3.3 percent (in line with the BoE projection) and one at 3.5 percent or above is the difference between a stable mortgage pricing environment and another upward shift.
What it means for investors
Gilt yields, equity sector rotation and sterling all respond to the CPI print. The 10-year gilt yield in particular has been highly sensitive to inflation surprises through 2025 and into 2026. Equity sectors that benefit from higher rates (banks, insurers) and those that suffer (commercial property, utilities with floating debt) typically diverge in the trading session following the ONS release.
For UK retail investors holding stocks and shares ISAs and SIPPs, the relevant signal is not the single CPI reading but the trajectory the MPC infers from it. A reading that confirms the BoE's central case is unlikely to move markets significantly. A reading that breaks meaningfully above or below the projection tends to drive larger repricing.
What to watch in the release
Three sub-components of the 20 May release are worth watching. First, services inflation, which the BoE describes as the most domestically driven measure of underlying price pressure. Services CPI ran at 4.5 percent in March, well above the headline rate. Second, core CPI (excluding energy, food, alcohol and tobacco), which was 3.1 percent in March. Third, transport, where motor fuels drove March's upward surprise; another month of similar dynamics would lock in a higher Q3 trajectory.
The ONS publishes the bulletin, full data tables and detailed briefing note at ons.gov.uk on the morning of 20 May. The next MPC meeting after that is 18 June, with the accompanying Monetary Policy Report released the same day.
Frequently Asked Questions
When is the next UK CPI release?
The Office for National Statistics publishes April 2026 CPI data on Tuesday 20 May 2026 at 7:00am UK time, via ons.gov.uk. The release covers the 12 months to April.
What is the current UK CPI rate?
CPI inflation was 3.3 percent in the 12 months to March 2026, up from 3.0 percent in February. CPIH was 3.4 percent. Core CPI was 3.1 percent. Services CPI was 4.5 percent.
What is the Bank of England base rate?
The Bank Rate is 3.75 percent, held at the MPC meeting on 29 April 2026 by an 8 to 1 vote. The next MPC decision is 18 June.
How does CPI affect my mortgage?
Higher CPI tends to push swap rates higher, which lenders use to price fixed-rate mortgages. A hotter CPI print typically results in higher mortgage offers within days. Tracker mortgages move directly with the Bank Rate following each MPC decision.
How does CPI affect savings rates?
Savings rates broadly follow the Bank Rate. Higher CPI strengthens the case for the MPC to hold or raise rates, which supports higher savings yields. Cash ISAs offer additional tax protection above the personal savings allowance.
Sources
- ONS Consumer Price Inflation release calendar: ons.gov.uk
- ONS CPI March 2026 bulletin: ons.gov.uk/economy/inflationandpriceindices
- Bank of England Monetary Policy Report April 2026: bankofengland.co.uk
- Bank of England Monetary Policy Committee minutes: bankofengland.co.uk/monetary-policy-summary-and-minutes
- HMRC personal savings allowance: gov.uk/apply-tax-free-interest-on-savings
