Energy price cap, fuel costs and inflation over the next few months

6th June 2026

From 1 July 2026, the Ofgem energy price cap jumps about 13%, taking a typical dual‑fuel Direct Debit bill to around £1,862 a year across Great Britain.
Analysts’ forecasts suggest a further, smaller rise or plateau into October–December 2026, keeping annual bills close to or just under £1,900 on typical use.

Layer on top:

Higher petrol and diesel prices, driven by wholesale oil markets and Middle East disruption.

Network and wholesale costs expected to stay elevated for several quarters.

Put together, that means:

Headline UK inflation, which has dipped toward the 2–3% range, is very likely to re‑accelerate toward 4% in the second half of 2026 as the July cap rise and fuel costs feed through the CPI basket.

The October cap level and any further fuel spikes will help keep inflation sticky, even if core goods and some services are cooling.

So yes—over the next few months, the energy cap changes plus fuel costs are a clear upward shove on inflation, not a neutral event.

Knock‑on effects on interest rates
The Bank of England’s job is to keep inflation near 2%. If inflation is heading back toward 4% and looks persistent rather than a one‑off blip, the Bank is more likely to:

Delay or slow any planned rate cuts, keeping Bank Rate higher for longer.

Emphasise that policy must stay “restrictive” until they’re confident energy‑driven inflation won’t spill over into wages and broader prices.

In other words, the energy cap and fuel costs don’t automatically force rates up again—but they make it harder for the Bank to cut, and could even justify another small rise if inflation expectations start drifting.

What that means for mortgage rates
Mortgage rates follow market expectations of future Bank Rate, not just today’s level. If traders and lenders think:

Inflation will be higher for longer, and

The Bank will keep rates up to fight it,

then:

Fixed‑rate mortgage deals are likely to stay elevated, or fall more slowly than people hoped earlier in the year.

Any brief dips in fixed rates can reverse quickly if new inflation data plus cap changes spook markets.

Variable and tracker mortgages will move broadly in line with Bank Rate—so if cuts are delayed, monthly payments stay higher for longer.

So the knock‑on is less “energy cap rises = instant mortgage hike” and more “energy cap rises + fuel costs = stickier inflation = Bank stays tough = mortgage rates don’t ease as fast as households need”.