UK Money: ISAs, Pensions, Stamp Duty and Bills — 2026-09-02

Top developments

Energy price cap rises to £1,723 from October

On 26 August 2026, Ofgem announced that the energy price cap for typical dual-fuel households paying by Direct Debit will rise to £1,723 per year starting 1 October 2026. This represents a 3.6% increase (rounded to 4% by Ofgem) from the current level of £1,663, adding approximately £60 to annual household bills despite previous VAT cuts. The new cap will remain in effect until 31 December 2026, driven largely by an 8% jump in gas costs.

Triple lock pressure intensifies before Autumn Budget

Lord Jim O’Neill, a close ally of Prime Minister Andy Burnham, has publicly urged the government to "get real" about the cost of the state pension triple lock, citing surging borrowing costs. This call for potential cuts comes just weeks before the Autumn Budget on 28 October 2026, where Chancellor John Healey is expected to address tax and welfare measures. The debate highlights growing fiscal tensions as the number of pensioners rises faster than the workforce, putting long-term sustainability at risk.

Mortgage refinancing cliff edge for 1 million homeowners

More than one million homeowners are coming off two-year fixed-rate mortgages in 2026 with an average interest rate of 4.81%, according to Compare the Market. Financial experts are warning these borrowers not to slip onto Standard Variable Rates (SVR), which could trigger a significant "bill shock" if they fail to remortgage in time.

Stamp duty relief ends for first-time buyers

First-time buyers have paid an additional £307m in stamp duty due to the decision to end the temporary tax holiday, according to Rightmove data cited in recent reports. Current guidance confirms that no further changes have been made to the rates introduced in April 2025, meaning the standard thresholds apply for 2026 purchases. First-time buyer relief currently applies to properties up to £300,000, but the loss of the wider holiday has increased upfront costs for many entrants to the market.

Local view

Polish-language media serving UK migrants, such as Polish Express, is highlighting upcoming September benefit changes and the uncertainty surrounding potential tax hikes in the Autumn Budget. Reports note that while income tax or National Insurance changes may not be immediate, the threat of higher taxes on savings and property is causing anxiety among households already facing higher energy costs. Local outlets are also emphasizing the importance of checking DWP updates regarding Universal Credit and free school meal eligibility changes taking effect in September.

Context & numbers

• New Price Cap: £1,723/year (effective 1 Oct – 31 Dec 2026).
• Previous Price Cap: £1,663/year (effective July–Sept 2026).
• Annual Increase: ~£60/year for typical households.
• Gas Cost Jump: 8% increase driving the overall cap rise.
• Mortgage Refinancing Volume: >1 million homeowners exiting 2-year fixes this year.
• Average Fixed Rate Expiring: 4.81%.

On the radar

• Autumn Budget: Scheduled for 28 October 2026; watch for announcements on ISA reforms, pension inheritance tax (IHT) changes, and potential stamp duty adjustments.
• Cash ISA Taxation: From 6 April 2027, cash held inside stocks and shares ISAs will face a 22% charge on interest earned, aiming to close loopholes after cash ISA limits were cut.
• HMRC Pension Guidance: HMRC is expected to publish further technical notes "later this summer" on withholding notices and IHT processes for pensions deaths after 6 April 2027.