Overtime Calculator
Work out your overtime pay, total weekly earnings and annual projection based on your hourly rate and overtime multiplier.
Weekly Pay Breakdown
*Average Monthly Pay Equivalent = weekly pay × 52 ÷ 12. It is an average based on 52 weeks a year, not an exact calendar-month figure.
Overtime Calculator UK
Our Overtime Calculator works out how much extra you earn from overtime hours, your total weekly pay, and your blended effective hourly rate. Enter your hourly rate, standard hours and overtime hours, choose a multiplier such as time-and-a-half or double time, and get an instant breakdown along with an optional annual projection.
How to Use the Overtime Calculator
- Enter your hourly rate in pounds.
- Enter your standard hours per week — the hours you’re contracted to work at your normal rate.
- Enter your overtime hours per week and choose an overtime multiplier, either using a preset (time-and-a-quarter, time-and-a-third, time-and-a-half, double time, triple time) or a custom value.
- Optionally enter weeks worked per year to see an annual pay projection.
- Your regular pay, overtime pay, total weekly pay and effective hourly rate update instantly.
How Is Overtime Pay Calculated?
Overtime pay is calculated by multiplying your hourly rate by your overtime multiplier, then by the number of overtime hours worked: Overtime Pay = Hourly Rate × Multiplier × Overtime Hours. Your total weekly pay is your regular pay (hourly rate × standard hours) plus your overtime pay. Your effective hourly rate blends both regular and overtime pay across all hours worked in the week.
| Multiplier | Common Name | £12/hr rate becomes |
|---|---|---|
| 1¼× (5/4) | Time and a quarter | £15.00/hr |
| 1⅓× (4/3) | Time and a third | £16.00/hr |
| 1.5× (3/2) | Time and a half | £18.00/hr |
| 2.0× | Double time | £24.00/hr |
| 3.0× | Triple time | £36.00/hr |
Is Overtime Pay a Legal Requirement in the UK?
There is no UK legal requirement for employers to pay a premium rate for overtime. Separately, National Minimum Wage and National Living Wage compliance is worked out using specific statutory rules about which pay and hours count within a given reference period — it is not simply a case of averaging all pay, including overtime premiums, together. Whether, and how much, extra you’re paid for overtime hours depends entirely on your employment contract. This calculator does not check minimum wage compliance, so if you’re unsure whether your pay meets the requirements, check gov.uk guidance or ask your employer.
Factors That Affect Your Overtime Earnings
- Overtime multiplier: Contracts vary widely — some pay flat rate for all hours, others offer 1.5x or 2x for extra or unsociable hours.
- Bank holiday and Sunday rates: Many employers pay a higher multiplier for bank holidays, Sundays or night shifts specifically.
- Tax and National Insurance: This calculator shows gross pay before deductions. Use our Income Tax Calculator or Salary Calculator to see your take-home pay after tax and NI.
- Pension contributions: If your pension is calculated on gross pay, overtime earnings may also increase your pension contributions.
- Contract type: Some roles use Time Off in Lieu (TOIL) instead of paid overtime — this calculator assumes paid overtime.
Frequently Asked Questions
How do I calculate time and a half?
Multiply your normal hourly rate by 1.5. For example, £12/hr at time and a half is £18/hr. Multiply that by the number of overtime hours worked to get your overtime pay.
Is my employer legally required to pay overtime?
No. UK law does not generally require employers to pay a premium rate for overtime. National Minimum Wage and National Living Wage compliance is calculated using specific statutory rules about which pay and hours count. Overtime pay terms are normally set by your employment contract.
How is double time calculated?
Double time means your overtime hours are paid at twice your normal hourly rate. For example, £12/hr becomes £24/hr for each overtime hour worked.
What is an effective hourly rate?
Your effective hourly rate is your total weekly pay (regular plus overtime) divided by your total hours worked. It shows your blended average rate across all the hours in the week, rather than just your base or overtime rate alone.
Does this calculator include tax and National Insurance?
No, this calculator shows gross pay only, before Income Tax, National Insurance and pension deductions. Use our Income Tax Calculator to estimate your take-home pay after overtime.
What overtime multiplier should I use?
Check your employment contract or payslip — common rates are time-and-a-half (1.5×) for standard overtime and double time (2×) for Sundays, bank holidays or night shifts, but rates vary significantly by employer and sector.
How much extra do I earn from overtime compared to my normal rate?
The calculator shows this as “Extra vs Straight Time” in the breakdown table — the additional amount you earn from the overtime multiplier, above what those hours would be worth at your normal hourly rate.
Can I use this calculator for salaried (non-hourly) overtime?
Yes, if your contract pays overtime at a fixed hourly rate. Divide your annual salary by your contracted annual hours to get an equivalent hourly rate, then enter that as your hourly rate.
Is there a legal limit on how many hours I can work, including overtime?
Under the Working Time Regulations, average weekly working time (including overtime) is generally limited to 48 hours, normally averaged over a 17-week reference period. Many workers can choose to opt out of this limit in writing, and specific exceptions apply to certain sectors and roles. This calculator does not check working-time limits — check gov.uk guidance or your contract for the rules that apply to you.