Personal Tax in the UK: Rules, Rates and Reporting Explained

Navigating personal tax in the UK can be overwhelming, but it doesn’t have to be. Our comprehensive guide breaks down the process and provides helpful tips for filing your personal tax return correctly. From understanding tax codes to claiming deductions, we explain the key areas you need to know to manage your tax responsibilities effectively.

Understand Your Tax Obligations

Before you can file your personal tax return in the UK, it’s essential to understand your tax obligations. This includes knowing your tax code, which your employer uses to calculate how much tax should be deducted from your pay. You should also be aware of any taxable income you have, such as rental income or self-employment earnings, along with any deductions or allowances you may be eligible for. Understanding these areas helps ensure your self assessment tax return is accurate and complete.

Individuals who have disposed of business assets and reinvested the proceeds into new qualifying assets may also be able to defer a Capital Gains Tax liability through business asset rollover relief a relief that is easy to overlook when preparing a self assessment return but can result in a significant tax saving where the conditions are met.

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Income Tax

Income tax is a tax on your earnings, including wages, salary, and self-employed income. The amount you pay depends on your earnings, tax code, and the current income tax rates that apply to your circumstances. It is important to consider all forms of income, your tax-free personal tax allowance, and the different tax bands when reviewing your personal tax position.

Individuals who have sold a second property during the tax year should also be aware that any gain may be subject to Capital Gains Tax separately from income tax the tax position when selling a second property carries its own rules and reporting requirements that must be addressed within the self assessment return.

For individuals who receive income from company shareholdings, dividend income is taxed separately from employment or self-employment income and carries its own rates and allowances understanding the tax on dividends is an important part of building a complete picture of your personal tax position.

Personal tax Allowance

Everyone has a personal tax allowance, which is the amount of money you can earn before you start paying tax. This allowance plays an important role in calculating your overall personal tax position. As of April 2023, the current personal allowance is £12,570.

It is important to note that the Personal Allowance is reduced by £1 for every £2 earned between £100,000 and £125,140. In essence, this means that those earning over £100,000 in the Higher rate band (explained below) will be paying tax on a larger portion of their income, and those in the Additional rate band have no Personal Allowance and pay a 45% tax on all of their income.

TAX BANDS

The amount of income tax you pay depends on how much you earn. There are different tax bands for different levels of income, which are:

Basic rate: 20% on earnings between £12,570 and £50,270
Higher rate: 40% on earnings between £50,271 and £150,000
Additional rate: 45% on earnings over £150,000

Importantly, as explained above, individuals with taxable incomes over £100,000 lose £1 of their tax-free personal allowance for every £2 of income, and those in the Additional rate band have zero tax-free personal allowance. Tax bands and allowances are reviewed each year and can change with the Budget keeping up to date with the current income tax bands and allowances ensures your tax planning remains accurate and that you are not calculating liabilities based on figures that no longer apply.

PERSONAL Tax Codes

Your tax code is used by your employer or pension provider to calculate how much income tax to deduct from your earnings. It’s based on your personal allowance and any other allowances or deductions you’re entitled to. The most common tax code is 1257L, usually for individuals with one source of income and who are eligible for the full personal allowance.

Where can I find my Tax Code?

You can find your tax code by registering with the HMRC and checking your tax code online. Alternatively, you can also find your tax code on your payslips. Payslip format differs from company to company, but it can usually be found at the top right of your payslip next to your name.

To check whether you are on the correct tax code, or get a better understanding of what your tax code means, you can read our guide on tax codes blog here: Understanding Tax Codes.

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National Insurance Contributions

National Insurance contributions (NICs) are payments made by employees, self-employed individuals, and employers to fund state benefits, such as the state pension, unemployment benefits, and healthcare. NICs are calculated on your earnings, and there are different rates depending on your employment status and earning. These contributions are deducted from your earnings and paid to HM Revenue and Customs (HMRC) on a regular basis.

Who Needs to Make National Insurance Contributions?

In the UK, most people who are over 16 and earn over a certain amount of money need to pay National Insurance contributions (NICs). This includes:

Employees earning more than £184 per week
Self-employed people with profits over £6,515 per year
People who earn money from renting out property
People who receive certain benefits or tax credits above a certain level
Some people who live abroad but work in the UK
People who are over 16 and under the State Pension age who have income from savings or investments above a certain level.

There are some exceptions to this, such as people who are over State Pension age (66 years), people who earn less than the minimum threshold, and some people who are self-employed but have low profits.

NIC bands in the uk

In the UK, National Insurance contributions (NICs) are divided into different brackets, depending on how much you earn. The current NICs brackets for the 2022-23 tax year are as follows:

If you earn less than £184 per week, you do not need to pay NICs.
If you earn between £184 and £967 per week, you pay NICs at a rate of 12% on earnings above £184.
If you earn more than £967 per week, you pay NICs at a rate of 2% on earnings above this amount.

For self-employed individuals, the brackets are slightly different, as NICs are based on your profits rather than your earnings. The current NICs brackets for the self-employed for the 2022-23 tax year are:

If your profits are less than £6,515 per year, you do not need to pay NICs.
If your profits are between £6,515 and £9,568 per year, you pay NICs at a rate of 9% on profits above the lower limit.
If your profits are over £9,568 per year, you pay NICs at a rate of 2% on profits above this amount.

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Where Can I find my National insurance number?

You can find your National Insurance number:

on your payslip
on your P60
on letters about your tax, pension or benefits
in the National Insurance section of your personal tax account

You can apply for a National Insurance number if you do not have one or find your National Insurance number if you’ve lost it. Improve Your Tax Reporting Process

Important Documentation and Forms for Personal Tax

Whether you are a sole trader, a PAYE employee or a director, there are a few things you should keep track of during the year to make your personal tax returns effortless and efficient.

PAYE Documentation and Forms

As a PAYE employee, there are a few things to take into account when completing a self-assessment. The “P” range of forms are important for you to keep track of all your expenses and benefits, as well as the codes you need to be aware of. A brief breakdown of these forms:

P800

You may receive a P800 form, also known as a ‘tax calculation letter’, if HMRC believes you have paid the wrong amount of tax – either too much or too little

P45

When you stop working at a job, your employer must supply you with a P45 form. This form details how much tax you have paid on your salary so far for that tax year. Tax years run from 6 April to 5 April the following year.

P60

The P60 form details how much tax you paid on your salary via PAYE. If you have multiple jobs, you will get a P60 from each of them. If you work for an employer on 5 April, that employer must provide you with your P60 by May 31st of that year.

P11D

P11D forms are used to report your ‘Benefits in Kind’ (or simply ‘benefits’) to HMRC. Benefits are anything given to you by an employer that has monetary value and is not wholly necessary for your work.

For a more detailed view of the PAYE forms, please see our guide: What are P800, P45, P60 and, P11D Forms?

Other important things to take note of are expenses that can offer tax relief benefits. You can read more about which expenses you can claim as a PAYE Employee in the following post: Save on Taxes – Tax Exemptions in the UK.

Sole Trader / Sole Proprietor / Entrepreneur

As a sole trader, you are trading as a business which means you may have additional business expenses and income that need to be listed. As a sole trader, there are many expenses that you can claim. See our guide here: What Expenses can I Claim for As Self Employed?

Sole traders who are planning to sell or close their business should also be aware of Business Asset Disposal Relief, which can reduce the Capital Gains Tax rate on qualifying disposals understanding how to navigate this relief is particularly valuable for entrepreneurs who have built up a business over several years and want to exit in the most tax-efficient way.

However, not every business expense automatically qualifies for relief HMRC applies a specific test when assessing whether a cost is deductible, and understanding how HMRC defines wholly and exclusively for tax purposes is essential for sole traders who want to claim the correct expenses without risking a compliance challenge.

At CIGMA we love working with small businesses and helping them in the most tax-efficient way. We also want to make it easy for entrepreneurs to manage their taxes which is why we’ve created a bookkeeping spreadsheet to assist you in keeping your information in an orderly manner:

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When Do You Need To Submit Personal Tax Returns to the HMRC?

There are clear guidelines as to who needs to submit a personal tax return and who should not.Understanding whether you need to file a self assessment tax return is an important part of staying compliant with HMRC requirements and the criteria are not always as straightforward as they appear, particularly for individuals with multiple income sources or fluctuating earnings.

However, in short, anyone meeting one or more of the following criteria is required by law to submit a tax return:

Taxable income was over £100,000.
Have a rental income of over £1,000 and landlords with property income have specific reporting requirements that go beyond standard self assessment, making it worth reviewing the self assessment process for landlords in detail before filing.
Received untaxed income over £2,500 (example: tips or commission).
Savings or Investment income over £10,000.
State pension as your only source of income and was over your personal allowance of £12,750 .
Sole proprietor earning over £1,000.
Earning any type of foreign income.
Claiming child benefit and your or your partner’s income exceeds £50,000.
You are a trustee of a trust or registered pension scheme.

Individuals making payments on account should also be aware that where their tax liability has reduced from the previous year, it may be possible to reduce the 31 July payment on account an option that is worth reviewing before the deadline to avoid overpaying tax unnecessarily.

Expert Personal Tax Support With Cigma Accounting in London

Managing personal tax obligations correctly is essential for individuals who want to remain compliant and avoid unexpected liabilities throughout the tax year. Cigma Accounting supports clients across Wimbledon, including individuals and business owners in Wimbledon Park and Raynes Park, helping them understand their responsibilities and make informed tax decisions.

From preparing a personal tax return to managing a self assessment tax return, accurate reporting is key to meeting HMRC requirements. Our team provides practical guidance on areas such as income tax rates and the personal tax allowance, helping individuals organise their affairs efficiently while ensuring filings are completed correctly and on time.

Frequently Asked Questions About Personal Tax in the UK

Who needs to complete a personal tax return?

You may need to complete a personal tax return if you are self-employed, a company director, receive certain types of untaxed income, have high income, or fall within HMRC’s Self Assessment criteria.

What are the current income tax rates in the UK?

Income tax rates depend on your income level and where you live in the UK. For the 2025/26 tax year, the main bands include the Personal Allowance, Basic Rate, Higher Rate, and Additional Rate bands, with different rates applying to different portions of income.

When is the deadline for submitting a Self Assessment tax return?

For online Self Assessment returns, the deadline is usually 31 January following the end of the tax year. Any tax owed is generally also due by 31 January.

What income needs to be reported on a personal tax return?

A personal tax return may include income from employment, self-employment, property rental, dividends, savings, investments, pensions, and other taxable sources.

What happens if I miss my personal tax return deadline?

Missing the deadline can lead to HMRC penalties and interest charges. Further penalties may apply if the delay continues or tax remains unpaid.

For online Self Assessment returns, the deadline is usually 31 January following the end of the tax year. Any tax owed is generally also due by 31 January.

A personal tax return may include income from employment, self-employment, property rental, dividends, savings, investments, pensions, and other taxable sources.

Missing the deadline can lead to HMRC penalties and interest charges. Further penalties may apply if the delay continues or tax remains unpaid.

Take Control of Your Personal Tax Responsibilities

Personal tax requirements can become complex when income sources, allowances, and HMRC deadlines change. Cigma Accounting helps individuals manage tax returns, understand liabilities, and stay compliant with clear, practical advice tailored to their financial circumstances.

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