A fixed-term contract can make your employment arrangements look straightforward, but working out exactly how much you should be paid is not always as simple as dividing an annual salary by 12.

Your pay may depend on your contracted hours, start and end dates, working pattern, holiday entitlement, overtime, bonuses and whether your contract covers a full working year or only part of it.

Understanding Fixed-Term Contract Pay is particularly important when you start or leave a role partway through a month, work part-time hours, or have a contract that lasts for only a few months.

This guide explains how fixed-term contract pay works in the UK, how to calculate a pro rata salary, how holiday pay is treated, and what to check on your payslip.

What Is Fixed-Term Contract Pay?

Fixed-term contract pay is the salary or wages paid to an employee whose employment contract is agreed to end on a specified date or after a particular event.

For example, an employer might offer:

• A six-month contract with a salary of £30,000 a year
• A 12-month maternity cover position
• A three-month project contract
• A temporary contract covering an employee’s absence
• A seasonal role running from April to September

A fixed-term employee can be paid in the same way as a permanent employee. The main difference is that the employment relationship has an agreed endpoint.

If the contract states an annual salary, this does not necessarily mean you receive the full annual amount. Your actual earnings depend on how long you work during the relevant period.

For example, someone earning £30,000 per year who works for six months may receive approximately £15,000 in gross salary before considering tax, National Insurance, pension contributions and other deductions.

However, the calculation can be more complicated if the employee starts or finishes partway through a month.

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How Does Fixed-Term Contract Pay Work in the UK?

There is no single calculation that applies to every fixed-term employee.

Your contract normally specifies your salary or hourly rate, working hours and other terms. Your employer then calculates your actual pay according to those terms and the period you have worked.

A fixed-term employee may be:

1. Paid an annual salary.
2. Paid a monthly salary.
3. Paid an hourly rate.
4. Paid a daily rate.
5. Working full-time or part-time.

If you are paid an annual salary but your contract lasts for less than a year, the salary can generally be converted into a proportion of the annual amount.

For example:

Annual salary: £36,000
Contract length: 6 months

A simple annualised calculation would be:

£36,000 × 6 ÷ 12 = £18,000

So the gross salary for six months would be £18,000, assuming the employee works throughout those six months under the same salary arrangement.

The exact payroll calculation can differ when the contract starts or ends during a month, so your employment contract and employer’s payroll policy should always be checked.

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What Does Pro Rata Mean for a Fixed-Term Contract?

“Pro rata” means proportionally.

In employment, a pro rata calculation is used when someone receives a proportion of a full-time or full-year amount.

For example, if a full-time employee earns £32,000 per year and a fixed-term employee works for half the year on the same full-time terms:

£32,000 × 6 ÷ 12 = £16,000

The employee would earn £16,000 gross over six months, before deductions.

Pro rata can also apply to working hours.

Suppose a full-time role is 40 hours per week and the annual salary is £40,000. An employee working 20 hours per week may have a salary of approximately:

£40,000 × 20 ÷ 40 = £20,000

This is a different calculation from simply looking at the length of the fixed-term contract.

A fixed-term employee can therefore have both:

• A pro rata salary based on working hours
• A pro rata amount based on the length of employment

Fixed-Term Contract Pay Calculation

A simple way to estimate earnings under a fixed-term contract is to determine the proportion of the annual salary covered by the contract.

Basic Formula

Fixed-Term Contract Pay = Annual Salary × Contract Period ÷ 12

For example:

• Annual salary: £42,000
• Contract: 4 months

Calculation:

£42,000 × 4 ÷ 12 = £14,000

Estimated gross contract pay is therefore £14,000.

This calculation works well when the contract covers complete months and the salary is annualised on a straightforward monthly basis.

For a contract that begins or ends partway through a month, the employer may use a daily or other payroll calculation method instead.

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How to Calculate Fixed-Term Pay for Part of a Month

Starting or leaving a fixed-term position mid-month requires more care.

Suppose your annual salary is £36,500 and your monthly salary is:

£36,500 ÷ 12 = £3,041.67

If your employment begins on the first day of the month, you would normally receive the full monthly salary for that month, subject to the terms of your contract.

If you start halfway through the month, your employer needs to calculate the amount relating to the days or working period covered by your employment.

There is no universal rule requiring every employer to use exactly the same pro rata method for salary. The contract, payroll arrangements and applicable employment terms can affect the calculation.

Common approaches include calculating pay using calendar days or working days.

Example Using Calendar Days

Suppose:

• Monthly salary: £3,000
• Month: 30 days
• Employee works 15 days

A simple calendar-day calculation would be:

£3,000 ÷ 30 × 15 = £1,500

This gives an estimated gross salary of £1,500 for the month.

Your employer may use a different contractual payroll formula, so this should be treated as an example rather than a universal payroll rule.

Fixed-Term Contract Pay Example

Consider an employee who receives a salary of £33,600 per year for a nine-month fixed-term contract.

Step 1: Calculate the monthly salary

£33,600 ÷ 12 = £2,800

Step 2: Multiply by the number of months

£2,800 × 9 = £25,200

The estimated gross salary for the nine-month contract is therefore:

£25,200

This is before deductions such as:

• Income Tax
• National Insurance
• Workplace pension contributions
• Student loan repayments, where applicable
• Other authorised deductions

The amount actually received in the employee’s bank account will therefore be lower than the gross contract pay.

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Fixed-Term Contract Pay and Part-Time Hours

A fixed-term employee may also work fewer hours than a comparable full-time employee.

For example, a full-time position pays £30,000 for 40 hours per week. You are offered a six-month fixed-term contract for 20 hours per week.

First calculate the part-time annual salary:

£30,000 × 20 ÷ 40 = £15,000

Then calculate six months of that salary:

£15,000 × 6 ÷ 12 = £7,500

Your estimated gross earnings for the six-month contract would therefore be £7,500.

This illustrates why it is important to consider both the contract duration and contracted hours.

Fixed-Term Contract Pay vs Permanent Employee Pay

A common misunderstanding is that fixed-term employees should automatically receive lower pay than permanent employees.

That is not generally how fixed-term employment works.

Under UK law, fixed-term employees have protections against less favourable treatment compared with comparable permanent employees in certain circumstances. There are also specific rules covering fixed-term employees under the Fixed-term Employees (Prevention of Less Favourable Treatment) Regulations 2002.

Pay should therefore be considered according to the terms of the role, working hours, qualifications, experience and other relevant factors rather than simply because the contract has an end date.

A fixed-term employee may receive:

• A salary
• Paid annual leave
• Statutory sick pay, where eligible
• Statutory maternity or other family-related payments, where eligible
• Pension rights where applicable
• Other contractual benefits

The precise entitlement depends on the circumstances and the terms of employment.

Holiday Entitlement on a Fixed-Term Contract

Holiday is an important part of Fixed-Term Contract Pay.

Fixed-term employees are generally entitled to paid statutory annual leave in the same way as other eligible workers.

The statutory minimum for most workers is 5.6 weeks of paid holiday per year, subject to the applicable rules and any contractual entitlement above the statutory minimum.

If you work for only part of the year, your holiday entitlement is normally calculated proportionally to the amount of time you work.

For example, if a full-time worker receives 28 days of annual leave for a complete holiday year and works for six months, a simple proportional calculation could be:

28 × 6 ÷ 12 = 14 days

The actual calculation can depend on your working pattern, holiday year and the rules applying to your employment.

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What Happens to Unused Holiday?

If your fixed-term contract ends while you have accrued holiday that you have not taken, you may be entitled to payment for the untaken holiday.

This is commonly called payment instead of holiday.

For example, imagine you have accrued 14 days of holiday but have taken only 10 days before your contract ends. If you are entitled to payment for the remaining four days, your employer should calculate the relevant holiday pay in accordance with the applicable rules.

Your final payslip may therefore contain both:

• Your final salary
• Payment for accrued but untaken holiday

However, the calculation of holiday pay can be more complex than simply dividing an annual salary by 260 working days, particularly where regular overtime, commission or other payments form part of normal remuneration.

Does a Fixed-Term Contract Include Tax and National Insurance?

Yes. Being employed on a fixed-term contract does not normally mean your salary is exempt from PAYE Income Tax or National Insurance.

Your employer will normally deduct applicable amounts from your gross pay through payroll.

For example:

Gross salary
− Income Tax
− Employee National Insurance
− Pension contribution
− Student loan repayment, if applicable
= Net pay

Your tax position depends on your circumstances, including your tax code, total taxable income and other relevant factors.

This means two employees earning the same gross fixed-term salary could potentially receive different net amounts.

For an accurate estimate, use the tax and National Insurance information applicable to the relevant tax year.

What Happens When a Fixed-Term Contract Ends?

When your fixed-term contract reaches its agreed end date, your employment may end without the need for a separate dismissal process if the contract was genuinely agreed to expire on that date.

However, employment law surrounding the ending of fixed-term contracts can be more complicated than simply reaching the date written in the contract.

Your final payment may include:

• Salary up to your final working day
• Accrued holiday pay
• Unpaid overtime, where applicable
• Commission or bonus amounts that are contractually due
• Other contractual payments
• Statutory or contractual redundancy payments, where applicable

You should check your final payslip against your contract and records of working time.

Fixed-Term Contract Pay and Bonuses

A bonus is not automatically included in a simple pro rata salary calculation.

If your contract provides for a bonus, you should check the conditions attached to it.

For example, a contract might state that an employee receives a £2,000 annual performance bonus subject to specific conditions.

If the employee works for only six months, you cannot automatically assume that the bonus will be £1,000. The contract may specify whether the bonus is:

• Discretionary
• Performance-based
• Pro rata
• Dependent on employment at a particular date
• Subject to other conditions

Always check the contractual wording before adding a bonus to your estimated fixed-term earnings.

Fixed-Term Contract Pay Calculator

A pro rata calculator can make it easier to estimate your earnings before accepting or starting a fixed-term role.

To estimate basic fixed-term earnings, you typically need:

1. Annual salary
2. Contract length
3. Working hours
4. Full-time working hours, if working part-time
5. Contract start and end dates

For a simple full-time contract lasting several complete months, you can use:

Annual Salary ÷ 12 × Number of Contract Months

For a part-time contract:

Full-Time Annual Salary × Contract Hours ÷ Full-Time Hours

You can then apply the contract duration to estimate total gross earnings.

For example:

• Full-time salary: £40,000
• Full-time hours: 40 per week
• Contract hours: 24 per week
• Contract length: 6 months

First:

£40,000 × 24 ÷ 40 = £24,000

Then:

£24,000 × 6 ÷ 12 = £12,000

Estimated gross fixed-term earnings are £12,000.

This type of calculation is useful for comparing a temporary offer with another job, budgeting for the contract period or checking whether an advertised salary matches your expected earnings.

Fixed-Term Contract Pay: Important Things to Check

Before accepting a fixed-term contract, do not look at the headline salary alone.

Check the following details:

1. Annual Salary

Find out whether the advertised figure is the full-time annual salary or the actual salary you will receive.

2. Working Hours

Check the number of hours you are contracted to work each week.

3. Start and End Dates

A contract beginning or ending partway through a month may require a pro rata calculation.

4. Holiday Entitlement

Check how much paid leave you receive and how the holiday year operates.

5. Overtime

Find out whether overtime is available and how it is paid.

6. Pension

Check whether you will be enrolled into a workplace pension and what contribution rates apply.

7. Bonus and Commission

Read the contractual conditions rather than assuming these payments are automatically pro rata.

8. Notice Period

Check what notice you or your employer must provide before the contract ends or is terminated early.

Common Mistakes When Calculating Fixed-Term Contract Pay

Several mistakes can lead to incorrect salary estimates.

Mistake 1: Dividing by 365 Automatically

Salary is not necessarily calculated by simply dividing annual salary by 365. Employers can use different contractual or payroll methods for partial periods.

Mistake 2: Ignoring Part-Time Hours

A six-month contract does not necessarily mean you receive half of a full-time annual salary. Your contracted hours also matter.

Mistake 3: Forgetting Holiday Pay

Your total financial entitlement may include holiday pay, particularly when your employment ends with unused accrued leave.

Mistake 4: Calculating Net Pay From Gross Pay Without Checking Tax

Gross salary and take-home pay are different. Tax code, National Insurance, pension contributions and other factors affect your net pay.

Mistake 5: Assuming Bonuses Are Automatically Pro Rata

Bonus arrangements depend on the contract and applicable conditions.

Final Thoughts

Understanding Fixed-Term Contract Pay helps you assess a temporary employment offer, plan your finances and check whether your salary payments look reasonable.

For a straightforward full-time contract covering complete months, calculating the salary proportionally is relatively simple:

Annual Salary × Contract Months ÷ 12

However, real payroll calculations can involve more variables. Starting or leaving partway through a month, working part-time hours, taking overtime, receiving bonuses or having unused holiday can all affect your final pay.

Before relying on an estimate, check your employment contract for the salary, working hours, holiday entitlement, payment dates and termination arrangements.

A Pro Rata Calculator UK can give you a useful starting estimate, but your employer’s payroll calculation and the terms of your contract determine the amount you are actually entitled to receive.