You could earn up to £18,570 in tax-free savings interest in 2025–26, thanks to the personal allowance, starting rate for savings, and the Personal Savings Allowance.

If your taxable income for the 2025–26 tax year is less than £17,570, you will not pay tax on the interest you receive. This figure combines the £5,000 starting rate for savings (taxed at 0%) with the £12,570 personal allowance.

In addition, the Personal Savings Allowance (PSA) provides further tax-free savings interest: basic-rate taxpayers can earn up to £1,000 in interest tax-free, while higher-rate taxpayers can earn up to £500. Those who pay the additional rate of tax on income over £125,140 are not eligible for the PSA. This means that a basic-rate taxpayer with no other income could receive up to £18,570 in tax-free interest.

It's important to understand that if your total non-savings income exceeds £17,570, you are no longer eligible for the starting savings rate. However, if your non-savings income falls between £12,570 and £17,570, the starting rate is reduced by £1 for every £1 your income exceeds your personal allowance.

Interest earned from ISAs or premium bond winnings is not included in these thresholds and remains tax-free. Those with higher savings in tax-free accounts can continue to benefit from their applicable PSA.

Banks and building societies no longer deduct tax from interest payments automatically. If you do owe tax on savings income, you must declare it through a self-assessment tax return.

If you’ve overpaid tax on your savings interest, you can submit a claim for a refund. Claims can be backdated up to four years from the end of the current tax year. For the 2021–22 tax year, the deadline to make a claim is 5 April 2026.

From self-employment to rental income, there are many reasons you may need to file a Self-Assessment return. Know the triggers and register with HMRC by 5 October if this is your first time.

There are a number of reasons why you might need to complete a self-assessment return. This includes if you are self-employed, a company director, have an annual income over £150,000 and / or have income from savings, investment or property.

You must file a self-assessment tax return if any of the following apply to you during the tax year:

• You were self-employed as a sole trader and earned more than £1,000 (before expenses).
• You were a partner in a business partnership.
• Your total taxable income exceeded £150,000 in the 2025–26 tax year. However, even if your income is under £150,000, other factors (such as rental income or capital gains) may still require you to file a self-assessment return.
• You had to pay Capital Gains Tax on the sale or disposal of assets.
• You were liable for the High Income Child Benefit Charge.
• You had other sources of untaxed income, such as:
  • Rental income from property
  • Tips or commission
  • Savings and investment income (including dividends)
  • Foreign income

If you need to file a self-assessment return for the first time, you must inform HMRC by 5 October following the end of the tax year. For the 2025–26 tax year (which ends on 5 April 2026), the deadline to register is 5 October 2026.

HMRC has an online tool www.gov.uk/check-if-you-need-tax-return/ that can help you check if you are required to submit a self-assessment return.

Once your income passes £100,000, your tax-free allowance starts to shrink. Between £100,000 and £125,140, the effective tax rate climbs to 60%, but smart planning can help.

If you earn over £100,000 in any tax year your personal allowance is gradually reduced by £1 for every £2 of adjusted net income over £100,000 irrespective of age. This means that any taxable receipt that takes your income over £100,000 will result in a reduction in personal tax allowances.

Your personal Income Tax allowance would therefore be reduced to zero if your adjusted net income is £125,140 or above. Your adjusted net income is your total taxable income before any personal allowances, less certain tax reliefs such as trading losses and certain charitable donations and pension contributions.

If your adjusted net income is likely to fall between £100,000 and £125,140 your £12,570 tax-free personal allowance is gradually tapered. This tapering continues until your allowance is fully withdrawn at an income level of £125,140. This effectively results in a 60% marginal tax rate on income between £100,000 and £125,140.

For example, if your adjusted net income is £110,000, you would lose £5,000 of your personal allowance. This additional £5,000 is taxed at 60% due to the combined effect of the 40% higher rate of Income Tax and the partial loss of the personal allowance.

If your income sits within this band you should consider what financial planning opportunities are available in order to avoid this personal allowance trap by trying to reduce your income below to £100,000. This can include giving gifts to charity, increasing pension contributions and participating in certain investment schemes.

The government’s 2025 Spending Review outlines a major funding boost for healthcare, defence, housing, and infrastructure to support long-term recovery and growth.

The 2025 Spending Review was published on 11 June 2025 and outlines the government's plans to support the country’s recovery by investing in security, health, and the economy. It sets budgets for government departments up to 2028–29 for everyday spending, and up to 2029–30 for long-term projects like infrastructure. Overall, departmental budgets will grow by 2.3% during this period. The review also sets funding levels for the devolved governments in Scotland, Wales, and Northern Ireland.

This includes a £29 billion investment to revitalise the NHS. The funding aims to modernise the health service, address backlogs, and future-proof care delivery. Specifically, up to £10 billion will be used towards digital transformation and technology. This will include measures to expand GP training to deliver millions more appointments, enhance mental health services in schools.

Beyond healthcare, the Spending Review also set out substantial investments in defence, infrastructure, housing and energy security. Defence will receive an £11 billion real-terms uplift, including £15 billion for a nuclear warhead programme and £6 billion for munitions manufacturing. Border security and asylum processing are also set for major upgrades.

The government will also channel billions into local transport, rail links, and regional regeneration projects, while launching the largest social and affordable housing programme in a generation with £39 billion over ten years. The devolved administrations will receive their largest real-terms settlements since devolution began in 1998 to help ensure that locally tailored priorities are funded robustly.

Corporation Tax rises with profit levels. Marginal relief bridges the gap, easing businesses from the 19% small profits rate to the 25% main rate.

The Corporation Tax Main Rate applies to companies with profits exceeding £250,000 and is currently set at 25%. For companies with profits up to £50,000, a Small Profit Rate (SPR) of 19% is applicable.

For profits between £50,000 and £250,000, a marginal rate of Corporation Tax is used to smooth the transition between the lower and upper limits. The lower and upper thresholds are also adjusted proportionately for short accounting periods of less than 12 months and for companies with associated entities.

Marginal relief gradually increases the effective Corporation Tax rate from 19% at profits of £50,000 to 25% at profits over £250,000. To calculate the Corporation Tax due, you multiply your profits by the main rate of 25% and subtract the marginal relief. For the current 2025 fiscal year, the marginal relief fraction is 3/200.