Key Changes from the 2025 Autumn Budget

Reviewed by Neil AinsworthLast updated: December 15, 2025 10:00 am

Image credit: Nikita Khandelwal @Pexels

Budget Announcements and The Impact on Your Finances

The 2025 Autumn Budget has delivered one of the most significant shake-ups to personal finance in years. Chancellor Rachel Reeves confirmed a broad package of smaller, targeted tax increases designed to raise £26 billion by 2029/30, while maintaining her pledge not to lift income tax, National Insurance (NI) or VAT rates.

A weaker economic outlook and the need to stabilise public finances have prompted a series of reforms that affect workers, savers, landlords and investors. With fiscal headroom now increased to £21.7 billion, the Government hopes to minimise uncertainty and avoid further unexpected rises next year.

Below, we outline the key measures and what they mean for households, along with insights for financial advisers helping clients navigate the shift.

Key Policies at a Glance

The Budget focuses on threshold freezes, tightened allowances and incremental increases across savings, dividends and property income. While no single rise is dramatic, the cumulative effect will be felt widely.

Income Tax and National Insurance

The freeze on income tax and NI thresholds will now run until the end of 2030/31, extending what is often described as a stealth tax. As wages rise with inflation, more workers drift into higher bands, reducing take-home pay and increasing tax receipts.

The freeze is projected to raise £8.3 billion by 2029/30.

The personal allowance (£12,570), higher-rate threshold (£50,270) and the 60% marginal tax window (which begins at £100,000) remain unchanged.

Implications:

• More earners will enter higher tax brackets
• Tax-efficient wrappers such as ISAs and pensions become more valuable
• Advisers may see increased demand for planning around allowances, mitigation and salary structures

For personalised guidance, individuals may benefit from speaking with an FCA-regulated adviser to assess the impact of prolonged fiscal drag on their long-term plans.

Cash ISA Allowance Cut

From April 2027, the cash ISA allowance for savers under 65 will fall from £20,000 to £12,000.

Savers may still allocate up to £20,000 across all ISA types, but only £12,000 can be held in cash. The remainder may be invested through a stocks & shares ISA.

Government figures suggest few savers currently exceed £12,500 in cash ISA contributions, but the reduction limits flexibility for those preferring low-risk saving.

Implications:

• More individuals may shift towards investment-based ISAs
• Advisers may need to support conversations around risk tolerance
• Portfolio diversification becomes more central to financial planning

Salary Sacrifice Pension Cap

From April 2029, pension contributions via salary sacrifice will be capped at £2,000 per year for NI relief. Contributions above this amount still receive income-tax relief but lose NI savings.

The Treasury expects this change to raise £4.7 billion in 2029/30.

Example:
A basic-rate taxpayer contributing £5,000 through salary sacrifice could pay around £240 more in NI due to reduced relief on the excess £3,000.

Implications:

• High earners may require adjusted pension strategies
• Corporate benefits teams will need to review scheme communications
• Advisers can help clients model the long-term impact on retirement planning

There is still over three years to prepare, giving advisers time to reshape contribution structures for clients.

Dividend Tax Increase

From April 2026, dividend tax rates rise by 2 percentage points for basic and higher-rate taxpayers:

• From 8.75% to 10.75%
• From 33.75% to 35.75%
• Additional-rate taxpayers remain unchanged

A taxpayer receiving £10,000 in dividends (after the £500 allowance) will pay £190 more in tax.

Implications:

• ISAs and pensions become even more attractive for holding equities
• Advisers can help clients reallocate assets to shield income from rising rates

Higher Tax on Rental Income

Landlords will see property income tax rates increase by 2% from April 2027:

• Basic rate: From 20% to 22%
• Higher rate: From 40% to 42%
• Additional rate: From 45% to 47%

Implications:

• Reduced net yields may push some landlords to exit the market
• Incorporation, mortgage structure and capital gains strategy become more important
• Advisers may need to guide clients through viability assessments

Tax on Savings Income

Savings interest outside an ISA will also rise by 2% from April 2027:

• 22% for basic-rate taxpayers
• 42% for higher-rate taxpayers
• 47% for additional-rate taxpayers

Combined with frozen thresholds and lower cash ISA allowances, savers face a challenging environment.

Implications:

• Greater reliance on tax wrappers
• Increased incentive for holistic cash-flow and savings reviews

Mansion Tax: High-Value Property Levy

Homes worth over £2,000,000 will attract a new annual charge from April 2028, collected via council tax systems:

• Properties over £2 million: A charge of £2,500
• Properties over £5 million: A charge of £7,500

This is expected to generate £400 million in revenue by 2029/30.

Other Notable Measures from the 2025 Autumn Budget

There are a number of other notable measures to be aware of:

• State pension for workers abroad: Class 2 NI voluntary payments removed from April 2026
• Student loans: Plan 2 thresholds frozen for three years from 2027/28
• Inheritance tax: Thresholds frozen until 2030/31
• Fuel duty: Freeze extended to September 2026
• Electric vehicles: New 3p-per-mile tax from 2028/29
• Gambling: Remote gaming duty increased to 40%

Good News to Consider

• Minimum wage: Over-21s to receive £12.71 per hour from April 2026
• Two-child benefit cap has been removed: Effective April 2026, costing £3 billion
• Green levy reform: Now funded via general taxation, reducing household bill pressure
• State pension: Rising 4.8% in April 2026, taking the new full rate to £12,547
• Energy costs: The Government has promised to reduce bills by an average of £150

What This Means for Households and Financial Advisers

This Autumn Budget reinforces a clear trend: tax thresholds are tightening, allowances are shrinking, and tax-efficient planning is more important than ever.

For households:

• ISAs and pensions remain powerful tools
• Income and investment strategies may need recalibration
• Landlords and higher earners face rising costs

For financial advisers:

• Expect increased demand for tax-efficiency reviews
• More households will require structured long-term planning
• Salary sacrifice changes create a significant advisory opportunity
• Complex cases (property, dividends, overseas workers) will rise

A Financial Adviser Can Help You Consider Your Financial Outlook

The Autumn Budget introduces meaningful changes that may reshape your financial outlook. Whether you’re reviewing your savings strategy, planning for retirement, or assessing your investment options, personalised advice can help you make confident decisions.

FinancialAdvisers.co.uk can connect you with an FCA-regulated adviser who can help you understand how these tax changes affect your plans – and what to do next.