Details: Gross Pay, Tax, National Insurance, Student Loan.
Understanding Your UK Paycheck
This UK Paycheck Calculator provides an estimate of your take-home pay after deductions such as Income Tax, National Insurance (NI), and Student Loan repayments. It uses the tax thresholds and rates applicable in the UK for the current tax year (which generally runs from 6 April to 5 April).
How it Works:
The calculation involves several steps:
Gross Pay: This is your total pay before any deductions. It's calculated by dividing your Annual Salary by your Pay Frequency (e.g., divide by 12 for monthly, 52 for weekly).
Personal Allowance: This is the amount of income you can earn each year without paying Income Tax. For most people, this is £12,570.
Taxable Income: This is your Gross Pay minus your Personal Allowance (if your Gross Pay is above the Personal Allowance).
Income Tax: Calculated based on your Taxable Income and the current tax bands (Basic, Higher, Additional rates). The calculator assumes the standard Personal Allowance and basic rate tax structure for simplicity.
National Insurance (NI): This is calculated based on your Gross Pay above certain thresholds. The rates and thresholds vary depending on your employment status and age. The calculator uses standard employee NI rates.
Student Loan Repayment: If you have a student loan, a percentage of your income above a specific threshold is deducted. The threshold and percentage depend on the Student Loan Type.
Net Pay: This is your Gross Pay minus all deductions (Income Tax, NI, Student Loan).
UK Tax Bands (Simplified for Calculation):
Please note that the specific thresholds can change slightly year to year and may be affected by devolved tax rates in Scotland. This calculator uses the standard UK rates:
Personal Allowance: £0 – £12,570 (0% tax)
Basic Rate: £12,571 – £50,270 (20% tax)
Higher Rate: £50,271 – £125,140 (40% tax)
Additional Rate: Over £125,140 (45% tax)
National Insurance Rates (Simplified for Calculation):
Primary Threshold: £12,570 per year (£1,048 per month, £242 per week) – Below this, no NI is usually paid.
Upper Earnings Limit: £50,270 per year (£4,189 per month, £967 per week) – NI is charged at 8% on earnings between the Primary Threshold and the Upper Earnings Limit.
Above Upper Earnings Limit: NI is charged at 2% on earnings above the Upper Earnings Limit.
Plan 4: 9% on earnings over £25,000 per year (Scotland only).
Plan 5: 9% on earnings over £29,375 per year.
Postgraduate Loan: 6% on earnings over £21,000 per year.
Disclaimer: This calculator provides an estimate only. Actual take-home pay may vary due to specific circumstances, pension contributions, other deductions, or changes in tax legislation. It is recommended to consult official sources or a financial professional for precise calculations.
function updateStudentLoanVisibility() {
var loanType = document.getElementById("studentLoanType").value;
var loanAmountGroup = document.getElementById("studentLoanAmountGroup");
if (loanType !== "none") {
loanAmountGroup.style.display = "block";
} else {
loanAmountGroup.style.display = "none";
document.getElementById("studentLoanAmount").value = ""; // Clear previous input if hidden
}
}
function calculatePaycheck() {
var annualSalary = parseFloat(document.getElementById("annualSalary").value);
var payFrequency = parseInt(document.getElementById("payFrequency").value);
var studentLoanType = document.getElementById("studentLoanType").value;
var studentLoanAmountInput = document.getElementById("studentLoanAmount");
var studentLoanAmount = 0;
if (isNaN(annualSalary) || annualSalary < 0) {
alert("Please enter a valid annual salary.");
return;
}
if (isNaN(payFrequency) || payFrequency <= 0) {
alert("Please enter a valid pay frequency (e.g., 12 for monthly, 52 for weekly).");
return;
}
if (studentLoanType !== "none") {
if (studentLoanAmountInput.style.display !== 'none') {
studentLoanAmount = parseFloat(studentLoanAmountInput.value);
if (isNaN(studentLoanAmount) || studentLoanAmount personalAllowance) {
if (annualSalary <= basicRateLimit) {
taxAmount = (annualSalary – personalAllowance) * 0.20;
} else if (annualSalary primaryThreshold) {
if (annualSalary loanThreshold) {
studentLoanDeduction = (annualSalary – loanThreshold) * loanRate;
}
var annualStudentLoan = studentLoanDeduction;
var periodicStudentLoan = annualStudentLoan / payFrequency;
// Net Pay Calculation
var netPay = grossPay – (periodicTax + periodicNI + periodicStudentLoan);
// Display Results
document.getElementById("netPay").innerText = "£" + netPay.toFixed(2);
document.getElementById("details").innerText =
"Gross Pay: £" + grossPay.toFixed(2) + " | " +
"Tax: £" + periodicTax.toFixed(2) + " | " +
"NI: £" + periodicNI.toFixed(2) + " | " +
"Student Loan: £" + periodicStudentLoan.toFixed(2);
}
// Initial call to set visibility based on default select value
document.addEventListener('DOMContentLoaded', updateStudentLoanVisibility);