£120,000 After Tax UK 2026/27 — Monthly Take-Home and the 60% Trap

Quick answer

For the 2026/27 tax year, a £120,000 gross salary in England, Wales or Northern Ireland produces:

Keep rate: 65.1%. Effective tax rate: 34.9%.

How the Personal Allowance taper works at £120k

The standard Personal Allowance for 2026/27 is £12,570. However, it tapers away for anyone earning above £100,000.

The rule: your PA reduces by £1 for every £2 of adjusted net income above £100,000.

At £120,000:

• Excess over £100,000 = £20,000
• PA reduction = £20,000 ÷ 2 = £10,000
• Effective PA = £12,570 − £10,000 = £2,570

That £10,000 of lost allowance was previously tax-free. At a 40% higher rate, the loss of that allowance costs an extra £4,000 in income tax — stacked on top of the 40% you would have paid anyway. This is why each pound in this zone carries a 60% effective rate.

The 60% trap — step by step

For every £1 you earn between £100,000 and £125,140:

At £120,000 you are sitting in the heart of this zone, with £20,000 of your salary (the £100k–£120k slice) having faced this 62% effective rate. This is the highest effective marginal rate in the entire UK income tax system — higher than the 47% (45% plus 2% NI) that applies above £125,140.

Comparing incomes across the taper zone

Every £10,000 raise inside the £100k–£125,140 zone adds roughly £3,800–£5,800 extra net pay. Compare that to a £10k raise at the £50k–£60k level, which would add around £5,800 net — and that raise would not carry the PA taper penalty.

Scotland at £120,000

The Personal Allowance taper is a UK-wide rule, so Scottish taxpayers at £120,000 also have an effective PA of £2,570 and a taxable income of £117,430. Scotland levies its own income tax bands, however, which means a higher total bill.

Scottish 2026/27 income tax at £120,000:

NI is unchanged (UK-wide): £4,410.60

Scotland net: £120,000 − £40,507.30 − £4,410.60 = £75,082.10/yr (£6,257/month)

Scottish taxpayers pay approximately £3,075 more per year in income tax at £120,000 compared to England. The gap widens relative to lower salaries because Scotland's Advanced rate (45%) applies above £75,000, while England's top rate (45%) only kicks in above £125,140.

Pension salary sacrifice — the most powerful tool at £120k

Anyone earning between £100,000 and £125,140 should seriously consider pension salary sacrifice. Every pound sacrificed reduces your adjusted net income, which is the figure HMRC uses to calculate the PA taper.

Worked example: James earns £120,000, sacrifices £20,000

Without pension sacrifice:

• Taxable income: £117,430 (PA = £2,570)
• Income tax: £37,432
• NI: £4,410.60
• Take-home: £78,157.40

With £20,000 salary sacrifice:

• New gross salary for tax purposes: £100,000
• PA fully restored to: £12,570
• Taxable income: £87,430
• Income tax: £27,432 (basic £7,540 + higher £19,892)
• NI: £3,730.60 (NI on £100k)
• Take-home: £68,837.40
• Plus £20,000 in pension pot

James's take-home falls by £9,320 but he gains £20,000 in pension. The effective cost of a £20,000 pension contribution is just £9,320 — a 53% discount. HMRC funds more than half of every pound he contributes.

The saving breaks down as:

• Normal higher-rate relief on £20k contribution: £8,000
• PA restoration (£10,000 of extra allowance at 40%): £4,000
• NI saving on sacrificed amount: £680
• Total tax and NI saving: £10,680

For salary sacrifice via employer payroll, both employee and employer NI are saved on the sacrificed amount — making it the most efficient form of pension saving available anywhere in the UK system.

Personal pension contributions (not salary sacrifice)

If salary sacrifice is not available, a personal pension contribution to a SIPP still produces substantial savings, though slightly less than salary sacrifice because NI relief is not available.

A £16,000 net contribution to a SIPP becomes £20,000 gross (with 20% basic-rate top-up added by the provider). You then claim an additional £4,000 through Self Assessment (higher-rate relief on the £20,000 gross). You also reduce your adjusted net income by £20,000, restoring your full PA — worth another £4,000 in income tax saved.

Total tax saving on a £20,000 gross personal pension contribution: £8,000 income tax (higher-rate relief plus PA restoration). Effective cost: £12,000 for a £20,000 pension pot.

High Income Child Benefit Charge (HICBC)

If you or your partner receives Child Benefit, the higher earner faces the HICBC once income exceeds £60,000. The charge tapers from £60,000 to £80,000, above which Child Benefit is completely clawed back.

At £120,000, Child Benefit is entirely eliminated. A family with two children receiving Child Benefit (£1,331 for the eldest child plus £881 for each additional child) loses the full amount — typically around £2,200 per year for a two-child family.

Mitigation: Pension contributions reduce adjusted net income. Sacrificing £40,000 to bring income below £80,000 would restore partial Child Benefit. Sacrificing enough to bring income below £60,000 restores it in full.

For detail, see HICBC explained.

Tax-Free Childcare and 30 hours free childcare

The £100,000 adjusted net income cap for Tax-Free Childcare and the 30-hour free childcare entitlement is a hard cliff. At £120,000, without pension contributions, you are excluded from both.

A family with two nursery-age children could be forgoing:

• Tax-Free Childcare: up to £4,000 per year in government top-ups across two children.
• 30 hours free childcare: potentially several thousand pounds per year in nursery fee savings.

A £20,000 salary sacrifice bringing income to £100,000 restores both entitlements — adding potentially £5,000–£8,000 of childcare support per year on top of the tax savings already described.

Plan 2 student loan at £120,000

For graduates with a Plan 2 student loan (repayment threshold £28,470 in 2026/27):

• 9% on £120,000 − £28,470 = £91,530 × 9% = £8,237.70/year
• Combined with income tax and NI: net take-home falls to approximately £69,920/year

For Plan 5 graduates (post-August 2023): the threshold is £25,000, making the deduction slightly higher still.

Employer cost at £120,000

Your employer pays 15% employer NI on earnings above the Secondary Threshold of £5,000:

• 15% on (£120,000 − £5,000) = £17,250

Total employment cost to your employer: £137,250. Of that, you take home £78,157. HMRC collects £59,093 in combined tax, employee NI and employer NI.

Tax-efficient actions checklist at £120k

1. Salary sacrifice to £100,000 — restores full PA, saves approximately £10,680 in combined tax and NI while putting £20,000 in your pension pot at an effective cost of only £9,320.
2. Maximise ISA — £20,000 per year sheltered from income tax and CGT on growth and income.
3. Gift Aid donations — each £100 donated reduces adjusted net income by approximately £125, worth up to 62p in the pound at this income level.
4. EV salary sacrifice — low Benefit in Kind rate, further reduces adjusted net income.
5. Check childcare entitlements — pension sacrifice to £100,000 may restore Tax-Free Childcare and 30-hour free childcare.
6. Register for Self Assessment — mandatory for all earners above £100,000, even on PAYE.

Monthly budget breakdown at £6,513/month

To put £6,513/month in context, here is a rough split based on typical London/South East costs:

For a single person without childcare costs in most parts of the UK, £6,513/month provides genuine financial comfort. With two children in full-time nursery in London, the picture looks materially different — which is precisely why pension sacrifice and restoration of Tax-Free Childcare matters so much at this salary.

Try the numbers yourself

Related reading:

• £110,000 After Tax UK 2026/27 — Monthly Take-Home and 60% Tax Trap Explained
• £125,140 After Tax UK 2026/27 — Zero Personal Allowance and the End of the Trap
• The £100k Tax Trap: Personal Allowance Taper Explained
• Salary Sacrifice UK Guide 2025/26
• HICBC: High Income Child Benefit Charge

Sources

• HMRC: Income Tax rates and Personal Allowance
• HMRC: Income over £100,000 — Personal Allowance restriction
• HMRC: National Insurance rates and categories
• Scottish Government: Scottish Income Tax 2026/27
• HMRC: Tax-Free Childcare eligibility
• HMRC: High Income Child Benefit Charge