The maths your payroll department should be doing —
but you can never see.
ShiftSlip models the complex rules in your pay agreement.
Here is a glimpse into what we handle for you behind the scenes.
Ireland — How the HSE calculates your pay
These are the rules most tools get wrong. ShiftSlip gets them right.
1. Sunday Premium
Calculating Sunday enhancements requires precise application of HSE multipliers. We ensure that your Sunday hours are accurately credited based on the exact rules defined for your role, rather than relying on standard generic percentages.
2. Saturday Premium
Saturday pay isn't always a simple multiplier. ShiftSlip understands when fixed cash allowances apply and ensures they are correctly added to your basic pay, regardless of the shift duration.
3. Night Duty
Night duty enhancements come with specific qualifying conditions. Our system checks your shift times against the exact qualifying windows to ensure you receive the correct night rate only when you meet the strict criteria.
4. Twilight Payment
Late hours at the end of a day shift often qualify for twilight rates. ShiftSlip splits your shift down to the minute to apply standard pay and twilight enhancements exactly where they belong.
5. PRSI Taper
A single extra shift can push your earnings into a new PRSI bracket, triggering complex tapering credits. ShiftSlip models these thresholds dynamically, helping you understand the real tax impact of taking on extra work.
6. ASC (Additional Superannuation Contribution)
Pension contributions differ wildly depending on when you joined the service. ShiftSlip accommodates different pension schemes and accurately calculates your ASC obligations based on your specific entry date and earnings.
United Kingdom — How NHS Agenda for Change pay is calculated
1. Unsocial Hours Enhancements
Enhancement rates for nights, weekends, and bank holidays vary significantly depending on your pay band. ShiftSlip dynamically applies the correct enhancement tier based on your specific band and the days you work.
2. NHS Pension Tiers
NHS Pension contributions are tiered based on your pensionable pay. ShiftSlip automatically determines your correct contribution bracket, adjusting accurately as your earnings fluctuate.
3. Ambulance Staff (Annex E)
Ambulance staff operate under a completely different enhancement model based on prospective percentages of basic salary. ShiftSlip features specialized handling for this unique rota-based system.
If your payslip is wrong, we write the email for you.
When ShiftSlip's calculation doesn't match your payslip, we don't just tell you there's a discrepancy. We generate a formal, professional email to your HR or payroll department — citing the exact circular, the exact rule, and the exact amount in question. You copy, paste, and send. No confrontation. No guesswork. Just maths.
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