public override NationalInsuranceCalculation CalculateNationalInsurance(decimal gross, char niCategory, PayPeriods payPeriods)
{
var totalPT = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.PrimaryThreshold);
var totalST = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.SecondaryThreshold);
var totalUEL = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.UpperEarningsLimit);
var totalLEL = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.LowerEarningsLimit);
var totalUST = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.UpperSecondaryThreshold);
var totalAUST = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.ApprenticeUpperSecondaryThreshold);
var niRates = TaxYearSpecificProvider.GetCodeSpecifics(niCategory);
var(periods, weeksInPeriod) = TaxMath.GetFactoring(payPeriods);
decimal periodPT = TaxMath.PeriodRound(TaxMath.Factor(totalPT, weeksInPeriod, periods), weeksInPeriod),
periodST = TaxMath.PeriodRound(TaxMath.Factor(totalST, weeksInPeriod, periods), weeksInPeriod),
periodUEL = TaxMath.PeriodRound(TaxMath.Factor(totalUEL, weeksInPeriod, periods), weeksInPeriod),
periodLEL = Math.Ceiling(TaxMath.Factor(totalLEL, weeksInPeriod, periods));
var niCalc = new NationalInsuranceCalculation
{
EarningsUptoIncludingLEL = SubtractRound(gross, periodLEL, 0),
EarningsAboveLELUptoIncludingPT = SubtractRound(gross, periodPT, periodLEL),
EarningsAbovePTUptoIncludingST = SubtractRound(gross, periodST, periodPT),
EarningsAboveSTUptoIncludingUEL = SubtractRound(gross, periodUEL, periodST),
EarningsAboveUEL = SubtractRound(gross, gross, periodUEL)
};
niCalc.EmployeeNiGross += TaxMath.HmrcRound(niCalc.EarningsAbovePTUptoIncludingST * (niRates.EeC / 100));
niCalc.EmployeeNiGross += TaxMath.HmrcRound(niCalc.EarningsAboveSTUptoIncludingUEL * (niRates.EeD / 100));
niCalc.EmployeeNiGross += TaxMath.HmrcRound(niCalc.EarningsAboveUEL * (niRates.EeE / 100));
niCalc.EmployerNiGross += TaxMath.HmrcRound(niCalc.EarningsAboveSTUptoIncludingUEL * (niRates.ErD / 100));
niCalc.EmployerNiGross += TaxMath.HmrcRound(niCalc.EarningsAboveUEL * (niRates.ErE / 100));
return(niCalc);
}
public override NationalInsuranceCalculation CalculateNationalInsurance(decimal gross, char niCategory, PayPeriods payPeriods)
{
var totalPT = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.PrimaryThreshold);
var totalST = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.SecondaryThreshold);
var totalUAP = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.UpperAccrualPoint);
var totalUEL = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.UpperEarningsLimit);
var totalLEL = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.LowerEarningsLimit);
var niRates = TaxYearSpecificProvider.GetCodeSpecifics(niCategory);
var(periods, weeksInPeriod) = TaxMath.GetFactoring(payPeriods);
decimal periodPT = TaxMath.PeriodRound(TaxMath.Factor(totalPT, weeksInPeriod, periods), weeksInPeriod),
periodST = TaxMath.PeriodRound(TaxMath.Factor(totalST, weeksInPeriod, periods), weeksInPeriod),
periodUAP = TaxMath.PeriodRound(TaxMath.Factor(totalUAP, weeksInPeriod, periods), weeksInPeriod),
periodUEL = TaxMath.PeriodRound(TaxMath.Factor(totalUEL, weeksInPeriod, periods), weeksInPeriod),
periodLEL = Math.Ceiling(TaxMath.Factor(totalLEL, weeksInPeriod, periods));
var niCalc = new NationalInsuranceCalculation();
// Employee NI Gross
var lelToPt = SubtractRound(gross, periodPT, periodLEL);
var ptToSt = SubtractRound(gross, periodST, periodPT);
var stToUap = SubtractRound(gross, periodUAP, periodST);
var uapToUel = SubtractRound(gross, periodUEL, periodUAP);
var aboveUel = SubtractRound(gross, gross, periodUEL);
niCalc.EmployeeNiGross = TaxMath.HmrcRound(ptToSt * (niRates.EeC / 100));
niCalc.EmployeeNiGross += TaxMath.HmrcRound(stToUap * (niRates.EeD / 100));
niCalc.EmployeeNiGross += TaxMath.HmrcRound(uapToUel * (niRates.EeE / 100));
niCalc.EmployeeNiGross += TaxMath.HmrcRound(aboveUel * (niRates.EeF / 100));
niCalc.EmployeeNiRebate = TaxMath.HmrcRound(lelToPt * (niRates.EeB / 100));
// Employer NI Gross
//niCalc.EmployerNiGross = TaxMath.HmrcRound(ptToSt * (niRates.ErC / 100));
if (!(niCategory == 'I' || niCategory == 'K' || niCategory == 'V'))
{
niCalc.EmployerNiGross += TaxMath.HmrcRound(stToUap * (niRates.ErD / 100));
}
niCalc.EmployerNiGross += TaxMath.HmrcRound(uapToUel * (niRates.ErE / 100));
niCalc.EmployerNiGross += TaxMath.HmrcRound(aboveUel * (niRates.ErF / 100));
niCalc.EmployerNiRebate = TaxMath.HmrcRound(lelToPt * (niRates.ErB / 100));
niCalc.EmployerNiRebate += TaxMath.HmrcRound(ptToSt * (niRates.ErC / 100));
if ((niCategory == 'I' || niCategory == 'K' || niCategory == 'V'))
{
niCalc.EmployerNiRebate += TaxMath.HmrcRound(stToUap * (niRates.ErD / 100));
}
return(niCalc);
}
public override NationalInsuranceCalculation CalculateNationalInsurance(decimal gross, char niCategory, PayPeriods periods)
{
int periodCnt = 52;
int weeksInPeriod = 1;
if (periods == PayPeriods.Monthly)
{
periodCnt = 12;
}
else
{
weeksInPeriod = (int)Math.Round((decimal)periodCnt / (int)periods);
}
var totalPT = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.PrimaryThreshold);
var totalST = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.SecondaryThreshold);
var totalUAP = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.UpperAccrualPoint);
var totalUEL = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.UpperEarningsLimit);
var totalLEL = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.LowerEarningsLimit);
var niRates = TaxYearSpecificProvider.GetCodeSpecifics(niCategory);
decimal periodPT = TaxMath.PeriodRound(TaxMath.Factor(totalPT, weeksInPeriod, periodCnt), weeksInPeriod),
periodST = TaxMath.PeriodRound(TaxMath.Factor(totalST, weeksInPeriod, periodCnt), weeksInPeriod),
periodUAP = TaxMath.PeriodRound(TaxMath.Factor(totalUAP, weeksInPeriod, periodCnt), weeksInPeriod),
periodUEL = TaxMath.PeriodRound(TaxMath.Factor(totalUEL, weeksInPeriod, periodCnt), weeksInPeriod),
periodLEL = TaxMath.PeriodRound(TaxMath.Factor(totalLEL, weeksInPeriod, periodCnt), weeksInPeriod);
var niCalc = new NationalInsuranceCalculation();
// Employee NI Gross
niCalc.EmployeeNiGross = TaxMath.HmrcRound(SubtractRound(gross, periodUAP, periodPT) * (niRates.EeD / 100));
niCalc.EmployeeNiGross += TaxMath.HmrcRound(SubtractRound(gross, periodUEL, periodUAP) * (niRates.EeE / 100));
niCalc.EmployeeNiGross += TaxMath.HmrcRound(SubtractRound(gross, gross, periodUEL) * (niRates.EeF / 100));
niCalc.EmployeeNiRebate = TaxMath.HmrcRound(SubtractRound(gross, periodST, periodLEL) * (niRates.EeB / 100));
niCalc.EmployeeNiRebate += TaxMath.HmrcRound(SubtractRound(gross, periodPT, periodST) * (niRates.EeC / 100));
// Employer NI Gross
niCalc.EmployerNiGross = TaxMath.HmrcRound(SubtractRound(gross, periodPT, periodST) * (niRates.ErC / 100));
niCalc.EmployerNiGross += TaxMath.HmrcRound(SubtractRound(gross, periodUAP, periodPT) * (niRates.ErD / 100));
niCalc.EmployerNiGross += TaxMath.HmrcRound(SubtractRound(gross, periodUEL, periodUAP) * (niRates.ErE / 100));
niCalc.EmployerNiGross += TaxMath.HmrcRound(SubtractRound(gross, gross, periodUEL) * (niRates.ErF / 100));
niCalc.EmployerNiRebate = TaxMath.HmrcRound(SubtractRound(gross, periodST, periodLEL) * (niRates.ErB / 100));
return(niCalc);
}
public override NationalInsuranceCalculation CalculateNationalInsurance(decimal gross, char niCategory, PayPeriods periods)
{
int periodCnt = 52;
int weeksInPeriod = 1;
if (periods == PayPeriods.Monthly)
{
periodCnt = 12;
}
else
{
weeksInPeriod = (int)Math.Round((decimal)periodCnt / (int)periods);
}
var totalPT = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.PrimaryThreshold);
var totalST = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.SecondaryThreshold);
var totalUEL = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.UpperEarningsLimit);
var totalLEL = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.LowerEarningsLimit);
var totalUST = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.UpperSecondaryThreshold);
var totalAUST = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.ApprenticeUpperSecondaryThreshold);
var niRates = TaxYearSpecificProvider.GetCodeSpecifics(niCategory);
// WTF. UEL must round 865.3846 to 866. But PT must round 680.3333 to 680. This isn't sane.
decimal periodPT = TaxMath.PeriodRound(TaxMath.Factor(totalPT, weeksInPeriod, periodCnt), weeksInPeriod),
periodUEL = Math.Ceiling(TaxMath.Factor(totalUEL, weeksInPeriod, periodCnt)),
periodLEL = Math.Ceiling(TaxMath.Factor(totalLEL, weeksInPeriod, periodCnt));
var niCalc = new NationalInsuranceCalculation
{
EarningsUptoIncludingLEL = SubtractRound(gross, periodLEL, 0),
EarningsAboveLELUptoIncludingPT = SubtractRound(gross, periodPT, periodLEL),
EarningsAboveSTUptoIncludingUEL = SubtractRound(gross, periodUEL, periodPT),
EarningsAboveUEL = SubtractRound(gross, gross, periodUEL)
};
niCalc.EmployeeNiGross += TaxMath.HmrcRound(niCalc.EarningsAboveSTUptoIncludingUEL * (niRates.EeC / 100));
niCalc.EmployeeNiGross += TaxMath.HmrcRound(niCalc.EarningsAboveUEL * (niRates.EeD / 100));
niCalc.EmployerNiGross += TaxMath.HmrcRound(niCalc.EarningsAboveSTUptoIncludingUEL * (niRates.ErC / 100));
niCalc.EmployerNiGross += TaxMath.HmrcRound(niCalc.EarningsAboveUEL * (niRates.ErD / 100));
return(niCalc);
}
public override NationalInsuranceCalculation CalculateNationalInsurance(decimal gross, char niCategory, PayPeriods payPeriods)
{
var totalPT = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.PrimaryThreshold);
var totalST = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.SecondaryThreshold);
var totalUEL = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.UpperEarningsLimit);
var totalLEL = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.LowerEarningsLimit);
var totalUST = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.UpperSecondaryThreshold);
var totalAUST = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.ApprenticeUpperSecondaryThreshold);
var niRates = TaxYearSpecificProvider.GetCodeSpecifics(niCategory);
// 'X' Ni Code does not pay NI contributions
if (niCategory == 'X')
{
gross = 0m;
}
var(periods, weeksInPeriod) = TaxMath.GetFactoring(payPeriods);
// WTF. UEL must round 865.3846 to 866. But PT must round 680.3333 to 680. This isn't sane.
decimal periodPT = TaxMath.PeriodRound(TaxMath.Factor(totalPT, weeksInPeriod, periods), weeksInPeriod),
periodUEL = Math.Ceiling(TaxMath.Factor(totalUEL, weeksInPeriod, periods)),
periodLEL = Math.Ceiling(TaxMath.Factor(totalLEL, weeksInPeriod, periods));
var niCalc = new NationalInsuranceCalculation
{
EarningsUptoIncludingLEL = SubtractRound(gross, periodLEL, 0),
EarningsAboveLELUptoIncludingPT = SubtractRound(gross, periodPT, periodLEL),
EarningsAboveSTUptoIncludingUEL = SubtractRound(gross, periodUEL, periodPT),
EarningsAboveUEL = SubtractRound(gross, gross, periodUEL)
};
niCalc.EmployeeNiGross += TaxMath.HmrcRound(niCalc.EarningsAboveSTUptoIncludingUEL * (niRates.EeC / 100));
niCalc.EmployeeNiGross += TaxMath.HmrcRound(niCalc.EarningsAboveUEL * (niRates.EeD / 100));
niCalc.EmployerNiGross += TaxMath.HmrcRound(niCalc.EarningsAboveSTUptoIncludingUEL * (niRates.ErC / 100));
niCalc.EmployerNiGross += TaxMath.HmrcRound(niCalc.EarningsAboveUEL * (niRates.ErD / 100));
return(niCalc);
}
public override NationalInsuranceCalculation CalculateNationalInsurance(decimal gross, char niCategory, PayPeriods payPeriods)
{
var totalPT = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.PrimaryThreshold);
var totalST = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.SecondaryThreshold);
var totalUAP = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.UpperAccrualPoint);
var totalUEL = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.UpperEarningsLimit);
var totalLEL = TaxYearSpecificProvider.GetSpecificValue <decimal>(TaxYearSpecificValues.LowerEarningsLimit);
var niRates = TaxYearSpecificProvider.GetCodeSpecifics(niCategory);
var(periods, weeksInPeriod) = TaxMath.GetFactoring(payPeriods);
decimal periodPT = TaxMath.PeriodRound(TaxMath.Factor(totalPT, weeksInPeriod, periods), weeksInPeriod),
periodST = TaxMath.PeriodRound(TaxMath.Factor(totalST, weeksInPeriod, periods), weeksInPeriod),
periodUAP = TaxMath.PeriodRound(TaxMath.Factor(totalUAP, weeksInPeriod, periods), weeksInPeriod),
periodUEL = TaxMath.PeriodRound(TaxMath.Factor(totalUEL, weeksInPeriod, periods), weeksInPeriod),
periodLEL = TaxMath.PeriodRound(TaxMath.Factor(totalLEL, weeksInPeriod, periods), weeksInPeriod);
#pragma warning disable IDE0017 // Simplify object initialization
var niCalc = new NationalInsuranceCalculation();
#pragma warning restore IDE0017 // Simplify object initialization
// Employee NI Gross
niCalc.EmployeeNiGross = TaxMath.HmrcRound(SubtractRound(gross, periodUAP, periodPT) * (niRates.EeD / 100));
niCalc.EmployeeNiGross += TaxMath.HmrcRound(SubtractRound(gross, periodUEL, periodUAP) * (niRates.EeE / 100));
niCalc.EmployeeNiGross += TaxMath.HmrcRound(SubtractRound(gross, gross, periodUEL) * (niRates.EeF / 100));
niCalc.EmployeeNiRebate = TaxMath.HmrcRound(SubtractRound(gross, periodST, periodLEL) * (niRates.EeB / 100));
niCalc.EmployeeNiRebate += TaxMath.HmrcRound(SubtractRound(gross, periodPT, periodST) * (niRates.EeC / 100));
// Employer NI Gross
niCalc.EmployerNiGross = TaxMath.HmrcRound(SubtractRound(gross, periodPT, periodST) * (niRates.ErC / 100));
niCalc.EmployerNiGross += TaxMath.HmrcRound(SubtractRound(gross, periodUAP, periodPT) * (niRates.ErD / 100));
niCalc.EmployerNiGross += TaxMath.HmrcRound(SubtractRound(gross, periodUEL, periodUAP) * (niRates.ErE / 100));
niCalc.EmployerNiGross += TaxMath.HmrcRound(SubtractRound(gross, gross, periodUEL) * (niRates.ErF / 100));
niCalc.EmployerNiRebate = TaxMath.HmrcRound(SubtractRound(gross, periodST, periodLEL) * (niRates.ErB / 100));
return(niCalc);
}