UKG Paycheck Calculator
:root {
–primary-blue: #004a99;
–success-green: #28a745;
–light-background: #f8f9fa;
–text-color: #333;
–border-color: #ddd;
}
body {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
line-height: 1.6;
color: var(–text-color);
background-color: var(–light-background);
margin: 0;
padding: 20px;
}
.paycheck-calc-container {
max-width: 900px;
margin: 20px auto;
background-color: #fff;
border-radius: 8px;
box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
overflow: hidden;
display: flex;
flex-wrap: wrap;
}
.calculator-section {
padding: 30px;
border-right: 1px solid var(–border-color);
box-sizing: border-box;
}
.calculator-section:last-child {
border-right: none;
}
.input-section {
flex: 1;
min-width: 300px;
}
.result-section {
flex: 1;
min-width: 300px;
background-color: var(–primary-blue);
color: #fff;
text-align: center;
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
}
h1, h2 {
color: var(–primary-blue);
text-align: center;
margin-bottom: 25px;
}
.input-group {
margin-bottom: 20px;
display: flex;
flex-direction: column;
}
.input-group label {
display: block;
margin-bottom: 8px;
font-weight: 600;
color: var(–primary-blue);
}
.input-group input[type="number"],
.input-group input[type="text"],
.input-group select {
width: calc(100% – 22px); /* Account for padding and border */
padding: 10px;
border: 1px solid var(–border-color);
border-radius: 4px;
font-size: 1rem;
box-sizing: border-box;
}
.input-group input[type="number"]:focus,
.input-group input[type="text"]:focus {
outline: none;
border-color: var(–primary-blue);
box-shadow: 0 0 0 2px rgba(0, 74, 153, 0.2);
}
.input-group select {
cursor: pointer;
appearance: none;
background-image: url('data:image/svg+xml;charset=US-ASCII,');
background-repeat: no-repeat;
background-position: right 10px center;
background-size: 16px;
}
button {
background-color: var(–success-green);
color: white;
border: none;
padding: 12px 25px;
border-radius: 5px;
font-size: 1.1rem;
cursor: pointer;
transition: background-color 0.3s ease;
width: 100%;
margin-top: 15px;
}
button:hover {
background-color: #218838;
}
.result-section h2 {
color: #fff;
margin-bottom: 15px;
}
#netPayResult {
font-size: 2.5rem;
font-weight: bold;
margin-top: 10px;
color: #fff;
padding: 15px;
border-radius: 5px;
background-color: var(–success-green);
display: inline-block;
}
.explanation {
max-width: 900px;
margin: 30px auto;
padding: 25px;
background-color: #fff;
border-radius: 8px;
box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}
.explanation h2 {
color: var(–primary-blue);
text-align: left;
margin-bottom: 15px;
}
.explanation p, .explanation ul, .explanation li {
margin-bottom: 15px;
color: var(–text-color);
}
.explanation li {
margin-left: 20px;
}
.explanation strong {
color: var(–primary-blue);
}
/* Responsive Adjustments */
@media (max-width: 768px) {
.paycheck-calc-container {
flex-direction: column;
}
.calculator-section {
border-right: none;
border-bottom: 1px solid var(–border-color);
}
.calculator-section:last-child {
border-bottom: none;
}
.result-section {
min-height: 200px;
}
}
Estimated Net Pay
£0.00
Per Pay Period
Understanding Your UK Paycheck Calculation
This calculator provides an estimation of your net pay (take-home pay) after deductions, based on common UK tax and National Insurance rules. UKG is a Human Resources Management system, and while this calculator uses general UK payroll logic, your actual payslip might vary slightly due to specific company policies, advanced salary sacrifice schemes, or precise tax calculation nuances.
How it Works:
The calculation follows these primary steps:
-
Gross Pay Calculation: Your annual salary is divided by your chosen pay frequency to determine your gross pay per period.
-
Pension Deductions: If you contribute to a pension scheme, these contributions (often pre-tax) are deducted from your gross pay.
-
Taxable Income: This is your gross pay minus any pre-tax deductions (like pension contributions).
-
Income Tax Calculation:
-
Personal Allowance: Most UK residents have a tax-free personal allowance (£12,570 for the 2023/2024 tax year). Your tax code modifies this. For simplicity, we use the standard allowance and assume the tax code adjustments cancel out for basic codes like 1257L.
-
Tax Bands: Income above the personal allowance is taxed at different rates depending on the amount. For this calculator, we focus on the basic and higher rates.
- Basic Rate (20%): On income between £12,571 and £50,270.
- Higher Rate (40%): On income between £50,271 and £125,140.
- Additional Rate (45%): On income above £125,140.
- The calculator prorates the annual tax bands to your pay period.
-
National Insurance (NI) Contributions:
- NI is calculated on earnings above certain thresholds. The rates and thresholds change annually. For the 2023/2024 tax year (using typical rates):
- Primary Threshold: No NI on earnings below this.
- Upper Earnings Limit: A lower rate applies to earnings above this threshold.
- The calculator applies the relevant NI rates based on your earnings per pay period.
-
Student Loan Repayments:
- These are calculated based on your income above a specific threshold, which varies by plan.
- Plan 1 Threshold: £22,015 annually.
- Plan 2 Threshold: £27,295 annually.
- Plan 4 Threshold: £25,375 annually.
- Postgraduate Loan Threshold: £21,000 annually.
- Repayment Rate: Typically 9% of income above the threshold.
-
Net Pay: This is your gross pay minus Income Tax, National Insurance, Student Loan repayments, and any other applicable deductions.
Disclaimer:
This calculator is for estimation purposes only. It does not account for all possible deductions (e.g., benefits in kind, union fees, specific salary sacrifice schemes beyond pension) or complex tax situations (e.g., multiple jobs, foreign income, specific tax code adjustments beyond the basic allowance). Always refer to your official payslip and consult with a financial professional for accurate and personalized advice. Tax rates and thresholds are based on the 2023/2024 UK tax year and are subject to change.
function calculateNetPay() {
// — Input Values —
var grossAnnualSalary = parseFloat(document.getElementById("grossAnnualSalary").value);
var payFrequency = parseInt(document.getElementById("payFrequency").value);
var taxCode = document.getElementById("taxCode").value.toUpperCase(); // Handle variations like 1257L
var studentLoanPlan = parseInt(document.getElementById("studentLoanPlan").value);
var pensionContributionsAnnual = parseFloat(document.getElementById("pensionContributions").value) || 0;
// — Basic Input Validation —
if (isNaN(grossAnnualSalary) || grossAnnualSalary <= 0) {
alert("Please enter a valid Gross Annual Salary.");
return;
}
if (isNaN(payFrequency) || payFrequency 0) {
var incomeTaxedAtBasicRate = Math.min(taxableIncomeAboveAllowance, (basicRateLimit – effectivePersonalAllowanceAnnual) / payFrequency);
incomeTaxPerPeriod += incomeTaxedAtBasicRate * basicRate;
taxableIncomeAboveAllowance -= incomeTaxedAtBasicRate;
if (taxableIncomeAboveAllowance > 0) {
var incomeTaxedAtHigherRate = Math.min(taxableIncomeAboveAllowance, (higherRateLimit – basicRateLimit) / payFrequency);
incomeTaxPerPeriod += incomeTaxedAtHigherRate * higherRate;
taxableIncomeAboveAllowance -= incomeTaxedAtHigherRate;
if (taxableIncomeAboveAllowance > 0) {
incomeTaxPerPeriod += taxableIncomeAboveAllowance * additionalRate;
}
}
}
// Ensure tax isn't negative due to rounding
incomeTaxPerPeriod = Math.max(0, incomeTaxPerPeriod);
// — National Insurance —
var niPerPeriod = 0;
var earningsForNI = grossPayPerPeriod; // NI is usually calculated on gross pay before tax
var niAbovePrimaryThreshold = Math.max(0, earningsForNI – (niPrimaryThreshold / payFrequency));
if (niAbovePrimaryThreshold > 0) {
var niAtRate1 = Math.min(niAbovePrimaryThreshold, ((niUpperEarningsLimit – niPrimaryThreshold) / payFrequency));
niPerPeriod += niAtRate1 * niRate1;
niAbovePrimaryThreshold -= niAtRate1;
if (niAbovePrimaryThreshold > 0) {
niPerPeriod += niAbovePrimaryThreshold * niRate2;
}
}
// Ensure NI isn't negative
niPerPeriod = Math.max(0, niPerPeriod);
// — Student Loan —
var studentLoanPerPeriod = 0;
var studentLoanThresholdAnnual = studentLoanThresholds[studentLoanPlan] || Infinity;
var earningsAboveStudentLoanThreshold = Math.max(0, grossAnnualSalary – studentLoanThresholdAnnual);
if (studentLoanPlan !== 0 && earningsAboveStudentLoanThreshold > 0) {
// Calculate the portion of annual earnings above threshold, then apply rate per period
studentLoanPerPeriod = (earningsAboveStudentLoanThreshold / payFrequency) * studentLoanRate;
}
// Ensure student loan isn't negative
studentLoanPerPeriod = Math.max(0, studentLoanPerPeriod);
// — Net Pay —
var netPayPerPeriod = grossPayPerPeriod – incomeTaxPerPeriod – niPerPeriod – studentLoanPerPeriod;
// — Display Result —
document.getElementById("netPayResult").innerText = "£" + netPayPerPeriod.toFixed(2);
}