How income tax is computed

Due to tax allowances that have been frozen, millions of taxpayers will have to pay higher income taxes

The calculation of income tax is explained.

Most forms of income are subject to income tax, but some are shielded from the tax collector by tax allowances.

The income tax rates and tax-free allowances are examined after the tax year ends, which is on April 5 of each year.

How much income tax do I owe?

Income tax is computed in tiers based on your earnings, whether you work for yourself or are employed. In essence, you pay more in taxes the more you make. However, it varies according to where you live in the nation.

England, Wales, and Northern Ireland's income tax rates.

Up to £12,570, earnings are tax-free. This amount is referred to as the personal allowance.

Following that, you will pay the basic rate of tax, which is 20% of the total amount up to £50,270.

You will pay a higher tax rate of 40 percent on earnings between £50,271 and £125,140.

Earnings over £125,140 are subject to an additional 45 percent rate.

What's the personal allowance?

The current personal allowance is 12,570, which is the amount of money you can earn without having to pay any income tax.

At what point does your personal allowance end?

All working individuals receive their personal allowance. That allowance, however, begins to disappear once your income reaches a particular threshold.

As per the regulations set forth by HM Revenue and Customs, you forfeit one of your 12,570 tax-free personal allowances for every £100,000 earned annually. Individuals who make more than 125,140 will not receive any personal allowance.

For a portion of your earnings between £100,000 and £125,140, this rule essentially establishes a 60 percent income tax band.

For illustration purposes, suppose a person receives a salary of £100,000 plus a bonus of £20,000, for a total of £120,000.

The higher rate of 40 percent is due from this bonus, so 8,000 would be subtracted.

In this case, the personal allowance is reduced by 10,000 because the bonus pushes the numbers over the 100,000 threshold. This also means that an additional 10,000 is placed in the higher rate income tax bracket.

Because of this, an additional 4,000 in income taxor a 60 percent tax rateis owed.

Are dividends included in the personal allowance?

Dividends are taxed unless dividend-producing investments are held in an ISA in excess of the annual allowance. Dividend income that is included in your personal allowance is tax-free, and each person is also eligible for a separate annual dividend allowance of £500.

Therefore, if you received 13,070 in dividend income during the 2025 - 2026 tax year, the dividend allowance could cover the remaining 500 and the personal allowance could cover the first 12,570.

Depending on your highest income tax rate, dividend tax over and above allowances (and outside of an ISA) is assessed at a different rate.

For basic rate taxpayers, the dividend income rate is 8 percent. 33 percent would be the tax rate that would be applied if the taxable dividend income fell into the higher rate tax band. For additional rate taxpayers, the tax rate would be 39 percent.

Will capital gains be covered by the personal allowance?

Capital gains are not subject to the personal allowance. Individuals are exempt from capital gains tax of up to £3,000 per year, per tax year.

You are exempt from paying any taxes if the sum of your gains and losses for the tax year is less than this amount.

Is the personal allowance based on savings?

Your personal allowance for income tax is unaffected by the amount of money you have saved. The interest you receive from savings, however, may be subject to income tax.

Basic rate taxpayers are able to earn £1,000 in tax-free interest each tax year through the annual personal savings allowance (PSA), after which they must pay 20%.

If you are a higher rate taxpayer, this allowance decreases to £500 annually, after which your savings income is subject to 40% tax.

Because they lack a PSA, top rate taxpayers will pay 45% interest from savings.

Is there a marriage allowance?

Married couples and those in civil partnerships can use the marriage allowance to transfer 10% of their personal allowance to one another, who can then claim the value of the allowance.

This means that if your spouse or civil partner makes more money than you do, you can give them 1,260 of your personal allowance. Nonetheless, there are requirements for eligibility.

For whom is the marriage allowance available?

One of you needs to be a basic-rate taxpayer, and the other must be married or in a civil partnership. This allowance is not available to taxpayers with higher or additional rates.

A tax bill could be lowered by up to 252 thanks to the marriage allowance. In certain situations, you might be able to claim from tax years beginning on April 5, 2020, so it's also worth seeing if you qualify to backdate your claim.

Your partner's income must typically fall between 12,571 and 43,662 in order for them to qualify for the marriage allowance in Scotland. They must pay the starter, basic, or intermediate rate.

How the personal allowance should be transferred.

Applying for marriage allowance online is the quickest option. Both your partner's and your own national insurance numbers are required.

You can also apply by mail by filling out a MATCF form that can be found on gov.uk.

In the event that you are already registered and file tax returns, you may also choose to do it through a self-assessment tax return.

Will 2025 see an increase in income tax rates?

The income tax rates for 2025 are not anticipated to change. The income tax band thresholds should typically increase to reflect the rising cost of living, enabling workers to earn more before higher tax rates take effect.

The 12,570 personal tax-free allowance and other tax bands, however, have been frozen since 2021 and will remain so until the 2028 - 2029 tax year.

Thresholds will once again increase in accordance with inflation, according to Chancellor Rachel Reeves' October 2024 first Budget.

Millions of earners are forced to pay more taxes as wages rise, though, because the policy does not raise allowances in accordance with the cost of living.

Because workers ultimately pay more tax as their salaries increase without the government raising headline tax rates, it is referred to as a stealth tax.

Income tax in the event that you work for yourself.

Must I complete a self-assessment tax return?

In contrast to employed individuals who automatically pay taxes through the PAYE (Pay As You Earn) system, self-employed individuals must file an annual self-assessment tax return, which will determine the amount of income tax they must pay.

To file your self-assessment tax return, you can either do it yourself or hire an accountant to do it for you. Understanding exactly how much you will owe is crucial to making sure you have enough money saved up to pay the bill.

To prevent penalties, pay close attention to the self-assessment tax return deadlines.

National Security.

Both employers and employees must pay the national insurance tax on their earnings; self-employed people pay it on their profits. The NHS, benefits like maternity pay, and the state pension are all funded by it.

Self-employed and employed individuals have different NI rates.

Class 1 National Insurance contributions, which are tier-based based on your earnings, are paid by those who are employed. With a weekly income of 0242, no NI is required. You pay 2 percent to people who make more than 967 per week, and 8 percent to those who make between 242.01 and 967.

The class 4 NI for self-employed people is 6% of profits between £12,570 and £50,270 and 2% of profits over £50,270.

Your self-assessment tax return will include your NI contributions, which are due concurrently with your income tax return.

After you reach the state pension age, you stop paying NI. However, self-employed individuals cease to pay class 4 NI at the beginning of the tax year following the year in which they reach state pension age.