Final Pay Calculator UK
Final pay is one of the easiest payroll moments to misunderstand. Your last payslip can include salary for part of a period, holiday owed, holiday overuse deductions, bonus, commission or notice-related items, all at once.
This calculator gives a practical estimate of the gross final amount before you compare it with the employer’s actual payroll calculation.
Estimate your final payslip
Enter the annual salary, how much of the pay period remains, holiday days owed or overused and any bonus or other additions.
Estimated final pay
How this calculator works
The gross final-pay estimate starts with the proportion of monthly salary owed for the days worked in the final pay period. It then adds or subtracts holiday pay depending on whether you are owed leave or have taken more than you accrued, and finally includes any bonus or commission you enter.
The estimated net figure then applies a simple UK tax-and-NI view to the final gross amount so you have a rough expectation before the payroll arrives.
Worked example
If you leave after 12 working days in a 21-working-day month on a £36,000 salary, you are owed a proportion of the monthly salary. If you also have three untaken holiday days, that increases the final gross.
This is why final payslips can look surprising. They combine regular pay, holiday adjustments and one-off items in a single run.
2025/26 rates, thresholds, and inputs
The model uses a common daily-rate approach for the holiday adjustment and a simple monthly-apportionment method for salary owed.
| Input | Purpose |
|---|---|
| Annual salary | Base monthly pay estimate |
| Days worked | How much of the final month is still payable |
| Working days in month | Used to apportion salary |
| Holiday days owed/overused | Adjusts final pay up or down |
| Bonus / commission | Adds one-off pay items |
Edge cases and assumptions
- PILON, statutory notice and redundancy are not separately modelled.
- The holiday adjustment assumes a simple daily-rate method.
- Tax treatment of the final payslip can vary depending on cumulative payroll position.
- Contract terms may allow overused holiday to be deducted, but you should check the wording.
FAQs
Will I be paid for untaken holiday in my final payslip?
Usually yes, if you have accrued statutory or contractual leave that you have not taken.
Why is final pay often different from a normal payslip?
Because it can include partial-month salary, holiday adjustments, bonus, commission and leaving-related items in one payroll run.
Is the net estimate exact?
No. It is a planning estimate. Actual payroll may differ based on cumulative PAYE treatment and leaving-date specifics.
Sources and methodology
This page uses a practical final-payslip model based on partial-period salary, holiday adjustment and optional one-off additions.
The net estimate applies a simplified UK tax and NI view to the gross result and should not be treated as a substitute for the employer payroll run.