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 = taxYearConfigurationData.PrimaryThreshold; var totalST = taxYearConfigurationData.SecondaryThreshold; var totalUAP = taxYearConfigurationData.UpperAccrualPoint; var totalUEL = taxYearConfigurationData.UpperEarningsLimit; var totalLEL = taxYearConfigurationData.LowerEarningsLimit; var niRates = taxYearConfigurationData.NiRates[niCategory]; var factoring = TaxMath.GetFactoring(payPeriods); int periods = factoring.Periods, weeksInPeriod = factoring.WeeksInPeriod; 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); }
protected override LimitThresholds CalculateLimitThresholdsForPeriods(PayPeriods payPeriods) { var factoring = TaxMath.GetFactoring(payPeriods); int periods = factoring.Periods, weeksInPeriod = factoring.WeeksInPeriod; // WTF. UEL must round 865.3846 to 866. But PT must round 680.3333 to 680. This isn't sane. return(new LimitThresholds { PrimaryThreshold = TaxMath.PeriodRound(TaxMath.Factor(TaxYearConfigurationData.PrimaryThreshold, weeksInPeriod, periods), weeksInPeriod), UpperEarningsLimit = Math.Ceiling(TaxMath.Factor(TaxYearConfigurationData.UpperEarningsLimit, weeksInPeriod, periods)), LowerEarningsLimit = Math.Ceiling(TaxMath.Factor(TaxYearConfigurationData.LowerEarningsLimit, weeksInPeriod, periods)), }); }
protected override LimitThresholds CalculateLimitThresholdsForPeriods(PayPeriods payPeriods) { var factoring = TaxMath.GetFactoring(payPeriods); int periods = factoring.Periods, weeksInPeriod = factoring.WeeksInPeriod; return(new LimitThresholds { PrimaryThreshold = TaxMath.PeriodRound(TaxMath.Factor(TaxYearConfigurationData.PrimaryThreshold, weeksInPeriod, periods), weeksInPeriod), SecondaryThreshold = TaxMath.PeriodRound(TaxMath.Factor(TaxYearConfigurationData.SecondaryThreshold, weeksInPeriod, periods), weeksInPeriod), UpperEarningsLimit = TaxMath.PeriodRound(TaxMath.Factor(TaxYearConfigurationData.UpperEarningsLimit, weeksInPeriod, periods), weeksInPeriod), LowerEarningsLimit = Math.Ceiling(TaxMath.Factor(TaxYearConfigurationData.LowerEarningsLimit, weeksInPeriod, periods)), }); }
protected override LimitThresholds CalculateLimitThresholdsForPeriods(PayPeriods payPeriods) { var factoring = TaxMath.GetFactoring(payPeriods); int periods = factoring.Periods, weeksInPeriod = factoring.WeeksInPeriod; // WTF. HMRC changed their rounding rules AGAIN in 2020. PeriodRound for the ST too. return(new LimitThresholds { PrimaryThreshold = TaxMath.PeriodRound(TaxMath.Factor(TaxYearConfigurationData.PrimaryThreshold, weeksInPeriod, periods), weeksInPeriod), SecondaryThreshold = TaxMath.PeriodRound(TaxMath.Factor(TaxYearConfigurationData.SecondaryThreshold, weeksInPeriod, periods), weeksInPeriod), UpperEarningsLimit = Math.Ceiling(TaxMath.Factor(TaxYearConfigurationData.UpperEarningsLimit, weeksInPeriod, periods)), LowerEarningsLimit = Math.Ceiling(TaxMath.Factor(TaxYearConfigurationData.LowerEarningsLimit, weeksInPeriod, periods)), }); }
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 payPeriods) { // The ST is back! But lower than PT. var totalPT = taxYearConfigurationData.PrimaryThreshold; var totalST = taxYearConfigurationData.SecondaryThreshold; var totalUEL = taxYearConfigurationData.UpperEarningsLimit; var totalLEL = taxYearConfigurationData.LowerEarningsLimit; var totalUST = taxYearConfigurationData.UpperSecondaryThreshold; var totalAUST = taxYearConfigurationData.ApprenticeUpperSecondaryThreshold; var niRates = taxYearConfigurationData.NiRates[niCategory]; var factoring = TaxMath.GetFactoring(payPeriods); int periods = factoring.Periods, weeksInPeriod = factoring.WeeksInPeriod; // 'X' NI Code does not pay NI contributions if (niCategory == 'X') { gross = 0m; } // WTF. HMRC changed their rounding rules AGAIN in 2020. PeriodRound for the ST too. decimal periodPT = TaxMath.PeriodRound(TaxMath.Factor(totalPT, weeksInPeriod, periods), weeksInPeriod), periodST = TaxMath.PeriodRound(TaxMath.Factor(totalST, 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), EarningsAboveUEL = SubtractRound(gross, gross, periodUEL), EarningsAboveSTUpToIncludingPT = SubtractRound(gross, periodPT, periodST), EarningsAbovePTUptoIncludingUEL = SubtractRound(gross, periodUEL, periodPT), }; niCalc.EmployeeNiGross += TaxMath.HmrcRound(niCalc.EarningsAboveSTUpToIncludingPT * (niRates.EeC / 100)); niCalc.EmployeeNiGross += TaxMath.HmrcRound(niCalc.EarningsAbovePTUptoIncludingUEL * (niRates.EeD / 100)); niCalc.EmployeeNiGross += TaxMath.HmrcRound(niCalc.EarningsAboveUEL * (niRates.EeE / 100)); niCalc.EmployerNiGross += TaxMath.HmrcRound((niCalc.EarningsAboveSTUpToIncludingPT + niCalc.EarningsAbovePTUptoIncludingUEL) * (niRates.ErD / 100)); niCalc.EmployerNiGross += TaxMath.HmrcRound(niCalc.EarningsAboveUEL * (niRates.ErE / 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); }
/// <summary> /// Returns a rounded period value /// </summary> /// <param name="specificValueType"></param> /// <param name="period"></param> /// <returns></returns> public decimal GetPeriodTaxYearValue(TaxYearSpecificValues specificValueType, PayPeriods period) { // Get the annual value decimal annualValue = GetSpecificValue <decimal>(specificValueType); // By default for weekly we have 52 weeks in our period int periodCnt = 52; int weeksInPeriod = 1; if (period == PayPeriods.Monthly) { periodCnt = 12; } else { weeksInPeriod = (int)Math.Round((decimal)periodCnt / (int)period); } return(TaxMath.PeriodRound((annualValue * weeksInPeriod) / periodCnt, weeksInPeriod)); }
public override NationalInsuranceCalculation CalculateNationalInsurance(decimal gross, char niCategory, PayPeriods payPeriods) { var totalPT = taxYearConfigurationData.PrimaryThreshold; var totalST = taxYearConfigurationData.SecondaryThreshold; var totalUEL = taxYearConfigurationData.UpperEarningsLimit; var totalLEL = taxYearConfigurationData.LowerEarningsLimit; var totalUST = taxYearConfigurationData.UpperSecondaryThreshold; var totalAUST = taxYearConfigurationData.ApprenticeUpperSecondaryThreshold; var niRates = taxYearConfigurationData.NiRates[niCategory]; var factoring = TaxMath.GetFactoring(payPeriods); int periods = factoring.Periods, weeksInPeriod = factoring.WeeksInPeriod; // 'X' NI Code does not pay NI contributions if (niCategory == 'X') { gross = 0m; } // 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 = taxYearConfigurationData.PrimaryThreshold; var totalST = taxYearConfigurationData.SecondaryThreshold; var totalUAP = taxYearConfigurationData.UpperAccrualPoint; var totalUEL = taxYearConfigurationData.UpperEarningsLimit; var totalLEL = taxYearConfigurationData.LowerEarningsLimit; var niRates = taxYearConfigurationData.NiRates[niCategory]; var factoring = TaxMath.GetFactoring(payPeriods); int periods = factoring.Periods, weeksInPeriod = factoring.WeeksInPeriod; 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); }
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); }
public override NationalInsuranceCalculation CalculateNationalInsurance(decimal gross, char niCategory, PayPeriods payPeriods) { var totalPT = taxYearConfigurationData.PrimaryThreshold; var totalST = taxYearConfigurationData.SecondaryThreshold; var totalUEL = taxYearConfigurationData.UpperEarningsLimit; var totalLEL = taxYearConfigurationData.LowerEarningsLimit; var totalUST = taxYearConfigurationData.UpperSecondaryThreshold; var totalAUST = taxYearConfigurationData.ApprenticeUpperSecondaryThreshold; var niRates = taxYearConfigurationData.NiRates[niCategory]; var factoring = TaxMath.GetFactoring(payPeriods); int periods = factoring.Periods, weeksInPeriod = factoring.WeeksInPeriod; 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); }