How is Overtime Taxed in the UK 2026/27? PAYE, NI and Take-Home Calculation

Working extra hours can boost your income, but the tax hit might surprise you. Unlike a salary increase, which is taxed at a predictable rate, overtime can push you into a higher tax band or change your National Insurance contributions. This guide explains how overtime is taxed in the UK in 2026/27, how to calculate your take-home, and the pitfalls to avoid.

How Overtime is Taxed

Overtime is treated as ordinary employment income by HMRC. It's subject to:

1. Income tax at your marginal rate (20% basic rate, 40% higher rate, 45% additional rate).
2. National Insurance at 8% (employees) on earnings between GBP 12,570 and GBP 50,270, and 2% above GBP 50,270.

Crucially, overtime is not taxed at a special lower rate -- it's simply added to your gross earnings and taxed at the rate that applies to your combined income.

This is different from some misconceptions people have. Some employees believe overtime is taxed more lightly, or that their employer takes a reduced deduction. This is false. Overtime faces exactly the same tax as any other income.

The Marginal Tax Rate Concept

Your "marginal tax rate" is the rate of tax applied to your next pound of earnings. If you're a basic-rate taxpayer (earning up to GBP 50,270/year), your marginal rate is 20%. If you're a higher-rate taxpayer, it's 40%. If you're an additional-rate taxpayer, it's 45%.

This matters for overtime because each extra pound you earn is taxed at this marginal rate. If you earn GBP 40,000/year and work 10 hours overtime at GBP 20/hour (GBP 200), that GBP 200 is taxed at 20% basic rate (your marginal rate), not at a blended rate.

However, if your overtime pushes you across a threshold, the calculation becomes more complex -- some of your overtime is taxed at 20%, and some at 40%.

Worked Example: Basic Rate Taxpayer with Overtime

Let's consider Mark, who earns GBP 35,000/year from his full-time job and works 5 hours of overtime per week at GBP 20/hour.

Annual calculations:

• Full-time salary: GBP 35,000
• Overtime: 5 hours/week × GBP 20/hour × 52 weeks = GBP 5,200
• Gross total: GBP 40,200

Income tax calculation:

• Personal allowance: GBP 12,570
• Taxable income: GBP 40,200 - GBP 12,570 = GBP 27,630
• Tax at 20%: GBP 27,630 × 20% = GBP 5,526
• Monthly PAYE: GBP 5,526 ÷ 12 = GBP 461

National Insurance calculation (class 1 employee):

• Earnings above GBP 12,570: GBP 40,200 - GBP 12,570 = GBP 27,630
• NI at 8%: GBP 27,630 × 8% = GBP 2,210.40
• Monthly NI: GBP 2,210.40 ÷ 12 = GBP 184.20

Total deductions: GBP 5,526 + GBP 2,210.40 = GBP 7,736.40 Take-home: GBP 40,200 - GBP 7,736.40 = GBP 32,463.60/year (or GBP 2,705.30/month)

So Mark's take-home after tax and NI is 80.8% of his gross earnings. His marginal take-home on each extra pound of overtime is 72% (100% - 20% tax - 8% NI).

Worked Example: Higher Rate Taxpayer with Overtime

Now consider Priya, who earns GBP 55,000/year and works the same 5 hours overtime per week.

Annual calculations:

• Full-time salary: GBP 55,000
• Overtime: GBP 5,200
• Gross total: GBP 60,200

Income tax calculation:

• Personal allowance: GBP 12,570
• Taxable income: GBP 60,200 - GBP 12,570 = GBP 47,630
• Tax at 20% (up to GBP 50,270 threshold): GBP 50,270 - GBP 12,570 = GBP 37,700 × 20% = GBP 7,540
• Tax at 40% (above GBP 50,270): GBP 60,200 - GBP 50,270 = GBP 9,930 × 40% = GBP 3,972
• Total tax: GBP 7,540 + GBP 3,972 = GBP 11,512
• Monthly PAYE: GBP 11,512 ÷ 12 = GBP 959.33

National Insurance:

• Earnings between GBP 12,570 and GBP 50,270 at 8%: GBP 37,700 × 8% = GBP 3,016
• Earnings above GBP 50,270 at 2%: GBP 9,930 × 2% = GBP 198.60
• Total NI: GBP 3,214.60
• Monthly NI: GBP 3,214.60 ÷ 12 = GBP 267.88

Total deductions: GBP 11,512 + GBP 3,214.60 = GBP 14,726.60 Take-home: GBP 60,200 - GBP 14,726.60 = GBP 45,473.40/year (or GBP 3,789.45/month)

Priya's take-home is 75.5% of gross. Her marginal take-home on each extra pound of overtime is 52% (100% - 40% tax - 8% NI on the first part, or 100% - 40% tax - 2% NI on amounts above GBP 50,270).

Notice the significant difference: Mark keeps GBP 0.72 of each overtime pound, while Priya keeps only GBP 0.52 -- a difference of 27% because she's in the higher rate band.

Annualisation Pitfalls: The Monthly vs Annual Calculation

One of the biggest mistakes with overtime tax is annualisation. Your employer calculates your PAYE each month based on your gross monthly earnings. If you work seasonal overtime (heavy in summer, minimal in winter), HMRC's annualisation can create issues.

For example, suppose you earn:

• January-May: GBP 2,500/month (salary only)
• June-August: GBP 3,500/month (salary + overtime)
• September-December: GBP 2,500/month (salary only)

If your payroll system annualises your June pay (GBP 3,500 × 12 = GBP 42,000), it might assess you in the higher rate band for that month, charging more tax than necessary. In reality, your annual gross is only GBP 35,000 (9 months × GBP 2,500 + 3 months × GBP 3,500), which is well below the higher rate threshold.

HMRC's strict rules state that your employer should annualise earnings only if you're in a "regular" overtime pattern. If your overtime is irregular or seasonal, they should average it across the year or use other methods. In practice, many small employers get this wrong.

If you overpay tax due to annualisation, you can:

1. Contact your employer's payroll team and ask them to correct your code for the following month.
2. File a Self-Assessment tax return (if you're not already required to) to claim a refund.
3. Contact HMRC directly on 0300 200 3300 if you can't resolve it with payroll.

Gross-Up Formula for Overtime

If you want to calculate the gross earnings needed to take home a specific amount after tax and NI, use this formula:

Gross = Net ÷ (1 - Marginal Tax Rate - Marginal NI Rate)

For a basic-rate taxpayer with 20% tax and 8% NI:

Gross = Net ÷ (1 - 0.20 - 0.08) = Net ÷ 0.72

For a higher-rate taxpayer (on amounts between GBP 50,270 and GBP 125,140) with 40% tax and 8% NI:

Gross = Net ÷ (1 - 0.40 - 0.08) = Net ÷ 0.52

Example: Mark wants to take home an extra GBP 1,000 from overtime. He needs: GBP 1,000 ÷ 0.72 = GBP 1,388.89 gross in overtime pay.

Statutory and Enhanced Overtime Rates

The UK doesn't have a legal minimum rate for overtime -- it's negotiated between employee and employer. Common rates include:

• Time and a half (1.5x your base hourly rate) -- common in manufacturing and some office jobs.
• Double time (2x your base hourly rate) -- common for Sundays or bank holidays.
• Flat rate -- some employers offer a fixed hourly rate for overtime (e.g., GBP 15/hour regardless of base salary).

Importantly, no matter what rate you're paid, the tax treatment is identical. If you earn GBP 200 in overtime at 1.5x or 2x your base rate, it's all treated as ordinary income and taxed at your marginal rate.

Self-Employed Overtime Considerations

If you're self-employed or a freelancer, overtime isn't really a concept -- you're paid per job or hour, and tax is calculated on your annual profit. However, the same principle applies: earnings are taxed at your marginal rate, and you'll also owe Class 2 and Class 4 National Insurance.

For Class 4 NI, the rates in 2026/27 are:

• 9% on profit between GBP 12,570 and GBP 50,270
• 2% on profit above GBP 50,270

Bonuses, Tips, and Commission: The Same Treatment

Bonuses, tips, and commission are also taxed at your marginal rate, just like overtime. The calculation is the same. If you receive a GBP 2,000 bonus, it's added to your gross income and taxed according to your overall income level.

Planning Your Overtime

Given that overtime faces full tax at your marginal rate, consider:

1. Whether it's worth it: For a higher-rate taxpayer, each extra pound of overtime only nets 52 pence. Is the extra work effort justified?
2. Alternative benefits: Could you negotiate flexible working instead, or ask your employer to increase pension contributions (which are tax-efficient)?
3. Seasonal pattern: If you know you'll earn overtime only in certain months, ask payroll to use a special coding notice to spread the allowance across the year, reducing overpayment.

Key Takeaways

• Overtime is taxed at your marginal income tax rate (20%, 40%, or 45%) plus National Insurance (8% or 2%).
• Basic-rate taxpayers keep ~72p of each overtime pound (80% × 90% approx).
• Higher-rate taxpayers keep ~52p of each overtime pound (60% × 87% approx).
• Annualisation can create overpayment in months with high overtime -- ask payroll to correct your code if this happens.
• Seasonal overtime is often annualised incorrectly by payroll systems -- check your tax code or file a return to claim a refund.

Use

to see the exact impact of overtime on your net earnings, or explore how different overtime rates and hours affect your annual income.

The key takeaway: overtime is worth less to a higher-rate taxpayer than a basic-rate one, because the tax bite is much larger. Plan your overtime strategy accordingly.