Pay award and back pay calculator
Use this when a national or local pay award is agreed and you want a rough sense of new salary, pro-rata uplift in the current leave year, and a back-pay lump sum. Figures are illustrative only; your employer may apply awards to different pay elements or stages.
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Understanding pay awards
When a national or local pay award is agreed, your headline salary usually increases by a consolidated percentage. Payroll may also pay back pay for months you were on the old rate, and a pro-rata uplift for the part of the leave year still to run on the new rate.
What this tool estimates
Enter your current gross salary, the award percentage, how many months of the year remain on the new rate, and how many months of back pay are owed. You see new annual salary, pro-rata uplift and lump sum back pay before tax.
What it does not include
Non-consolidated payments, spot salaries, pension tier changes, tax and National Insurance on back pay, or employer-specific rules about which pay elements attract the award. Always confirm with payroll.
Official references
Check your employer announcement, union summary or published pay circular. NHS staff: NHS Employers pay hub. Teachers: STPCD on gov.uk.
Your estimate
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How this estimate worksAward %, pro-rata and back pay rules
Award is applied as a single consolidated % on headline salary.
- Pro-rata uplift = annual difference × (months on new rate ÷ 12)
- Back pay = monthly difference × months owed
Tax, pension and non-consolidated elements are not modelled. Always confirm with payroll.
Common questions
Does this include tax on my back-pay lump sum?
No. The calculator shows gross figures only. Back pay can push you into a higher tax band in the month it is paid. Use your role take-home pay calculator with the new salary for a net view, and confirm with payroll.
What if my employer pays a non-consolidated award?
Some awards split a consolidated increase on basic pay from a one-off non-consolidated payment. This tool models a single consolidated % on headline salary. Check your pay circular or union summary for how your employer is applying the deal.
How do pro-rata uplift and back pay differ?
Pro-rata uplift is the extra pay you will receive for the months still to run in the leave year on the new rate. Back pay is the lump sum owed for months already worked at the old rate. Payroll may pay these in different payslips.