What does the Overtime Pay Calculator do?

Calculate overtime earnings at time-and-a-half, double time or custom rates. All calculations are performed in your browser using official UK rates and thresholds.

Is this calculator based on 2025/26 rates?

Yes. This calculator uses the current 2025/26 UK tax year rates for income tax, National Insurance and other deductions, effective from 6 April 2025.

Does this include pension contributions?

This calculator can factor in workplace pension contributions. Under auto-enrolment, the minimum is 8% total (5% employee + 3% employer) of qualifying earnings.

Overtime Pay Calculator

Calculate overtime earnings at time-and-a-half, double time or custom rates.

Last updated: April 2026 · Source: GOV.UK — Overtime: your rights

Annual Salary

Standard Hours/Week

Overtime Hours/Week

Overtime Rate

Standard Rate

£15.38/hr

Overtime Rate

£23.08/hr

Weekly Overtime

£115.38

Annual Extra

£6,000.00

Total Annual Earnings (salary + overtime)

£36,000.00

Disclaimer

This calculator is provided for informational purposes only and should not be considered as financial or tax advice. All calculations are performed locally in your browser — no personal data is collected or sent to our servers. Rates and thresholds are sourced from HMRC and GOV.UK and are updated for the current tax year. Always verify results with HMRC or consult a qualified professional before making financial decisions.

How It Works

There is no statutory UK right to enhanced overtime pay — it depends entirely on your employment contract. Common overtime rates are time-and-a-half (1.5× your normal hourly rate) and double time (2× your normal hourly rate). Some contracts pay overtime at the standard rate or offer time off in lieu instead.

For tax purposes, overtime pay is treated identically to regular earnings. It is added to your normal pay in the period it is received and taxed at your marginal income tax rate plus National Insurance. This means high overtime in one period can push you into a higher tax bracket temporarily.

This calculator works out your overtime earnings at the specified premium rate, then calculates the tax and NI on the extra income. Enter your standard hourly rate, the overtime premium and the number of extra hours to see both the gross and net overtime pay.

Example: 10 hours overtime at time-and-a-half, base £16/hour

Overtime rate: £16 × 1.5 = £24/hour
Gross overtime pay: £24 × 10 = £240
Tax on overtime (20% basic rate): £48
NI on overtime (8%): £19.20
Net overtime pay: £240 − £67.20 = £172.80

Source: GOV.UK — Overtime: your rights

Frequently Asked Questions

What does the Overtime Pay Calculator do?: Calculate overtime earnings at time-and-a-half, double time or custom rates. All calculations are performed in your browser using official UK rates and thresholds.
Is this calculator based on 2025/26 rates?: Yes. This calculator uses the current 2025/26 UK tax year rates for income tax, National Insurance and other deductions, effective from 6 April 2025.
Does this include pension contributions?: This calculator can factor in workplace pension contributions. Under auto-enrolment, the minimum is 8% total (5% employee + 3% employer) of qualifying earnings.