# Do I Need to File Self Assessment if I Earn Over £100,000?

Earning over £100,000 in the UK no longer automatically triggers a Self Assessment tax return. Discover the new £150,000 PAYE threshold, tax code changes, and who still needs to file.

**Published:** 2026-07-06  
**Updated:** 2026-07-06  
**Source:** https://aztajournal.com/gb/self-assessment-earning-over-100k-uk

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> Earning over £100,000 in the UK no longer automatically requires you to file a Self Assessment tax return. HMRC updated the threshold to £150,000, meaning PAYE taxpayers with simple tax affairs within this range are exempt from filing unless other common income triggers apply.

## Key Takeaways: Self Assessment Rules for High Earners

Understanding your tax filing obligations prevents processing errors and unexpected bills. Under the current rules administered by Her Majesty's Revenue and Customs, high earners must navigate specific filing criteria.

1. The automatic filing threshold for sole PAYE income is £150,000, which has been raised from the historical £100,000 level.
2. Other tax triggers still mandate a return, such as rental profits, dividend income, or self-employment earnings exceeding specific thresholds.
3. The Personal Allowance taper remains active above £100,000, meaning you may experience tax code adjustments even if you are exempt from filing a return.

## Do I need a self assessment if I earn over 100k on PAYE?

No, you do not automatically need to file a Self Assessment tax return if you earn over £100,000 solely through PAYE. The official filing threshold for PAYE-only income has been successfully raised to £150,000.

If your taxable income is paid entirely through Pay As You Earn and rests between £100,000 and £149,999, you are exempt from filing for the 2025/26 tax year. This simplifies tax affairs for thousands of employees nationwide. However, this exemption only applies if you have no other sources of taxable income that independently trigger HMRC reporting guidelines.

## What is the new Self Assessment threshold for PAYE income?

The new Self Assessment threshold is the income limit at which a taxpayer on Pay As You Earn must submit an annual tax return. Since the 2023/24 tax year and continuing through 2025/26, this threshold stands at £150,000, up from £100,000.

The transition occurred to reduce administrative burdens on payrolled employees. Prior to the 2023/24 tax year, anyone earning over £100,000 had to file. Now, those earning between £100,000 and £149,999 are excluded from this specific requirement, while individuals earning £150,000 or above must register and file annually.

## Who still needs to file a Self Assessment tax return?

Many taxpayers earning below the £150,000 PAYE threshold still need to complete a return due to secondary income sources. HMRC guidelines state that alternative financial circumstances automatically trigger mandatory filing.

- Gross self-employment income exceeding £1,000 in a single tax year.
- Rental income from property investments that exceeds £1,000.
- Active participation as a partner in a business partnership.
- Inclusion in the High Income Child Benefit Charge after earning more than £60,000.
- Receipt of untaxed income, such as foreign earnings or dividend income.
- Employment claims for business-related expenses that exceed £2,500.
- Holding a position as a company director with associated benefits in kind.

## How does the £100k personal allowance taper affect my tax?

The Personal Allowance reduces by £1 for every £2 of adjusted net income earned over £100,000, disappearing entirely at £125,140. This taper applies regardless of whether you are required to submit a tax return.

Under the Income Tax Act rules, this taper creates an effective marginal tax rate of 60% within the £100,000 to £125,140 bracket. Because your tax free Personal Allowance shrinks to zero, HMRC must adjust your tax code to collect the correct amount of income tax.

If HMRC fails to adjust your tax code accurately, you might underpay tax. Even if you do not meet the £150,000 threshold to file a return, you remain liable for any unpaid tax resulting from tax code errors. It is vital to check your coding notice online to ensure correct deductions.

## What are the Self Assessment deadlines for 2025/26?

Deadlines for the 2025/26 tax year are strictly enforced by HMRC to prevent late filing penalties. You must register, submit, and pay your liabilities according to the official timeline.

| Required Action | Official HMRC Deadline |
| --- | --- |
| Register for Self Assessment | 5 October 2026 |
| Submit Paper Tax Return | 31 October 2026 |
| Submit Online Tax Return | 31 January 2027 |
| Pay Remaining Tax Owed | 31 January 2027 |

### Do I need a self assessment if I earn £120k on PAYE?

No. If your only source of income is PAYE and you have no other criteria like dividends or self-employment earnings, you are not required to file a return because £120,000 is below the updated £150,000 boundary.

### What happens to my personal allowance when I earn over £100,000?

Your allowance drops by £1 for every £2 of income above £100,000. It decreases from the standard rate and runs down to zero once your income reaches £125,140.

### Is a director of a limited company always required to file a tax return?

Generally, yes, if you receive benefits in kind or dividends that exceed your allowances. You must register to declare any untaxed income received from the business.

### At what income level do I have to pay the High Income Child Benefit Charge?

The charge is triggered when your individual adjusted net income exceeds £60,000. It must be declared through a Self Assessment return.

### How can I check if I officially need to send a tax return to HMRC?

You can use the official HMRC 'Check if you need to send a Self Assessment tax return' tool on the GOV.UK portal, which evaluates your income streams.