Income Tax UK: Tax Codes, Allowances, PAYE, Scottish Rates and ReliefsWhat Happens If You Earn Over £100k UK — Tax, Benefits & Allowances Impact
What happens when you earn over £100,000 in the UK. How you lose your personal allowance, the 60% tax trap, pension restrictions, child benefit clawback, and strategies to reduce your tax bill.
For a comprehensive overview of income tax, see our Income Tax guide.
Earning over £100,000 is a significant milestone — but it triggers multiple tax consequences. Here’s what changes and how to minimise the impact.
Read more: See our Take Home Pay guide for a complete overview of this topic.
The Personal Allowance Trap
How It Works
| Income Level | Personal Allowance | Effect |
|---|
| Up to £100,000 | £12,570 | Full allowance |
| £100,001-£125,140 | Reduced | Lose £1 per £2 over £100k |
| Over £125,140 | £0 | No personal allowance |
The 60% Tax Trap Explained
Between £100,000 and £125,140, you face an effective 60% marginal tax rate:
| Component | Rate |
|---|
| Normal 40% rate | 40% |
| Plus lost allowance (20% on £2 lost per £2 earned) | 20% |
| Effective rate | 60% |
Example: You earn £110,000
| Calculation | Amount |
|---|
| Amount over £100,000 | £10,000 |
| Personal allowance lost | £5,000 (half of £10,000) |
| Extra tax from lost allowance | £2,000 (£5,000 × 40%) |
| Normal tax on £10,000 | £4,000 (40%) |
| Total extra tax on that £10,000 | £6,000 (60%) |
Complete Tax Band Picture (2026/27)
| Income Band | Tax Rate | Notes |
|---|
| £0-£12,570 | 0% | Personal Allowance (if eligible) |
| £12,571-£50,270 | 20% | Basic rate |
| £50,271-£100,000 | 40% | Higher rate |
| £100,001-£125,140 | 60% (effective) | Personal allowance taper |
| £125,141-£150,000 | 40% | Higher rate (no personal allowance) |
| Over £150,000 | 45% | Additional rate |
Self Assessment Requirement
You Must File If Income Over £100k
| Requirement | Details |
|---|
| Must register | By 5 October after tax year |
| File deadline | 31 January (online) |
| Paper deadline | 31 October (if submitting paper) |
| Even if PAYE | Still required |
| Penalties | £100+ for late filing |
How to Register
| Step | Action |
|---|
| 1 | Go to gov.uk/register-for-self-assessment |
| 2 | Register online |
| 3 | Receive UTR (Unique Taxpayer Reference) |
| 4 | Set up Government Gateway account |
| 5 | File return by deadline |
What to Declare
| Item | Include |
|---|
| Employment income | P60 figures |
| Benefits in kind | P11D items |
| Self-employment | Any side income |
| Rental income | Property earnings |
| Interest/dividends | Above allowances |
| Capital gains | Above annual exemption |
High Income Child Benefit Charge
How It Works
| Your Income | Charge |
|---|
| Under £60,000 | No charge — keep full benefit |
| £60,000-£80,000 | Gradual clawback (1% per £200) |
| Over £80,000 | Full benefit clawed back |
Calculating the Charge
| Income | Percentage Clawed Back |
|---|
| £60,000 | 0% |
| £65,000 | 25% |
| £70,000 | 50% |
| £75,000 | 75% |
| £80,000+ | 100% |
Child Benefit Amounts (2026/27)
| Children | Weekly Amount | Annual |
|---|
| First child | £26.05 | £1,354.60 |
| Each additional | £17.25 | £897.00 |
| 2 children total | £43.30 | £2,251.60 |
| 3 children total | £60.55 | £3,148.60 |
Making the Decision
| Option | Best When |
|---|
| Keep claiming | Income close to threshold, cost small |
| Opt out | Income well over £80k, filing hassle not worth it |
| Partner claims | They earn less than £60k |
Important: Even if you opt out, register for Child Benefit to protect State Pension credits (especially if partner not working).
Pension Restrictions
Annual Allowance Taper
| Your “Adjusted Income” | Annual Allowance |
|---|
| Under £260,000 | £60,000 |
| £260,000-£360,000 | Tapered down |
| Over £360,000 | £10,000 minimum |
Taper calculation: Lose £1 of allowance for every £2 over £260,000
Threshold Income
| Term | Meaning |
|---|
| Threshold Income | Your income minus pension contributions |
| If under £200,000 | No taper applies (full £60,000) |
| If over £200,000 | Check Adjusted Income |
Lifetime Allowance Replacement
| From April 2024 | New Rules |
|---|
| Lump Sum Allowance | £268,275 tax-free |
| Lump Sum and Death Benefit Allowance | £1,073,100 |
| Excess taxed | At marginal rate |
Tax Strategies for High Earners
1. Pension Contributions (Most Effective)
| Strategy | How It Works |
|---|
| Contribute to pension | Reduces “adjusted net income” |
| Reclaim personal allowance | Get back £1 allowance per £2 contributed |
| Tax relief | 40%/45% relief on contributions |
| Net cost | Much lower than gross contribution |
Example: Earning £125,000
| Action | Result |
|---|
| Contribute £25,000 to pension | Adjusted income = £100,000 |
| Personal allowance restored | Full £12,570 |
| Tax saved from restored allowance | £5,028 |
| Plus 40% pension tax relief | £10,000 |
| Pension contribution costs you | £9,972 net |
| But you get £25,000 in pension | 150% effective boost |
2. Salary Sacrifice
| Item | Tax/NI Savings |
|---|
| Pension | Saves Income Tax and National Insurance |
| Electric car | Company car tax savings |
| Cycle to work | Small savings |
| Childcare vouchers | If had before 2018 |
3. Charitable Giving with Gift Aid
| How It Works | Benefit |
|---|
| Donate to charity | They claim 25% Gift Aid |
| Claim higher rate relief | Get extra 20%/25% back |
| Extends basic rate band | Pushes income down |
| Can restore personal allowance | If planned carefully |
4. Investment Schemes
| Scheme | Tax Relief | Risk |
|---|
| Venture Capital Trust (VCT) | 30% income tax relief | High risk investments |
| Enterprise Investment Scheme (EIS) | 30% relief, CGT deferral | Very high risk |
| Seed EIS | 50% relief | Highest risk |
Warning: These are high-risk investments — tax relief shouldn’t be the only reason to invest.
5. ISA Planning
| ISA Type | 2026/27 Limit |
|---|
| Cash ISA | £20,000 total |
| Stocks & Shares ISA | Across all types |
| Lifetime ISA | £4,000 (counts toward total) |
Benefit: All growth and income tax-free, no impact on personal allowance calculations.
National Insurance at High Earnings
NI Rates 2026/27
| Earnings | NI Rate |
|---|
| £12,570-£50,270 | 12% |
| Over £50,270 | 2% |
Note: NI reduces to 2% above Upper Earnings Limit — no additional trap like income tax.
Scottish Income Tax Differences
If You Live in Scotland
| Band | Income | Rate |
|---|
| Starter | £12,571-£14,876 | 19% |
| Basic | £14,877-£26,561 | 20% |
| Intermediate | £26,562-£43,662 | 21% |
| Higher | £43,663-£75,000 | 42% |
| Advanced | £75,001-£125,140 | 45% |
| Top | Over £125,140 | 48% |
The 60% trap still applies (loss of personal allowance), making effective rate even higher in Scotland.
Other Benefits and Allowances Affected
Savings and Dividend Allowances
| Allowance | Higher Rate (40%) | Additional Rate (45%) |
|---|
| Personal Savings Allowance | £500 | £0 |
| Dividend Allowance | £500 | £500 |
Marriage Allowance
| Eligibility | Over £100k |
|---|
| Can transfer? | No — not eligible if higher rate taxpayer |
| Your spouse can | If they’re basic rate |
Student Loan Repayments
| Plan | Threshold | Rate |
|---|
| Plan 1 | £24,990 | 9% |
| Plan 2 | £27,295 | 9% |
| Plan 4 | £31,395 | 9% |
| Plan 5 | £25,000 | 9% |
| Postgraduate | £21,000 | 6% |
High earners: Repay faster due to higher payments, potentially clear debt sooner.
Planning Example
Scenario: £130,000 Income
Without planning:
| Element | Amount |
|---|
| Income | £130,000 |
| Personal allowance | £0 (fully lost) |
| Income tax | ~£42,460 |
| NI (approx) | ~£6,540 |
| Take home | ~£81,000 |
With £30,000 pension contribution:
| Element | Amount |
|---|
| Income | £130,000 |
| Less pension contribution | -£30,000 |
| Adjusted income | £100,000 |
| Personal allowance | £12,570 (restored) |
| Income tax | ~£27,432 |
| NI (approx) | ~£6,540 |
| Take home | ~£66,028 |
| Plus in pension | £30,000 |
| Total value | ~£96,028 |
Effective cost of £30,000 pension: Only ~£15,000!
Key Actions for High Earners
| Action | Why |
|---|
| Register for Self Assessment | Required over £100k |
| Review pension contributions | Most effective tax shelter |
| Check Child Benefit position | May need to pay charge or opt out |
| Consider salary sacrifice | Reduce taxable income |
Annual Reviews
| Review | When |
|---|
| Pension contribution room | Start of tax year |
| Tax position | Before 5 April |
| Investment allowances | ISA deadline 5 April |
| Capital gains position | Before 5 April |
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