If the calculator doesn’t load within a few seconds, please refresh the page.
Here’s how much you might earn
London (GBP)
Other UK Locations (GBP)
Your Gross Salary:
3,541.47 GBP
Your Take-Home Pay:
2,833.18 GBP
Your Growth Potential Over 6 Years
Year
Gross
Net
Experience Bonus
* Net salary is an estimate based on tax regulations as of 2024.
It doesn’t include additional benefits or allowances you may receive. Projections include an estimated annual inflation rate of 2.5%.
This calculator gives you a good idea of potential earnings, but the actual offer may vary based on your specific skills and experience.
(function() {
// Country-specific data for UK only
const countryData = {
‘uk_lon’: {
baseSalary: 3541.47,
currency: ‘GBP’,
taxRates: {
zusRetirement: 0.12,
zusDisability: 0.0,
zusSickness: 0.0,
healthInsurance: 0.0,
taxRate1: 0.20,
taxRate2: 0.40,
annualTaxThreshold: 50270,
monthlyTaxFreeReduction: 1047.50/12
}
},
‘uk_other’: {
baseSalary: 3079.54,
currency: ‘GBP’,
taxRates: {
zusRetirement: 0.12,
zusDisability: 0.0,
zusSickness: 0.0,
healthInsurance: 0.0,
taxRate1: 0.20,
taxRate2: 0.40,
annualTaxThreshold: 50270,
monthlyTaxFreeReduction: 1047.50/12
}
}
};
// Global constants
const EXTERNAL_RATE = 0.03;
const INFLATION_RATE = 0.025;
function calculateNetSalary(grossMonthly, countryCode) {
const taxRates = countryData[countryCode].taxRates;
const annualGross = grossMonthly * 12;
// Social security contributions (equivalent to ZUS in Poland)
const socialBase = grossMonthly;
const retirementContribution = socialBase * taxRates.zusRetirement;
const disabilityContribution = socialBase * taxRates.zusDisability;
const sicknessContribution = socialBase * taxRates.zusSickness;
const totalSocialContributions = retirementContribution + disabilityContribution + sicknessContribution;
// Health insurance
const healthBase = grossMonthly – totalSocialContributions;
const healthInsurance = healthBase * taxRates.healthInsurance;
// Tax calculation
let taxBase = 0;
let deductionRate = 0.99; // Default work-related expense rate
// UK uses personal allowance differently
deductionRate = 1.0;
taxBase = Math.round((grossMonthly – totalSocialContributions) * deductionRate);
// Tax calculation depending on country type
let tax = 0;
// Progressive tax
if (annualGross 0) {
tax -= taxRates.monthlyTaxFreeReduction;
}
} else {
const monthlyThreshold = taxRates.annualTaxThreshold / 12;
tax = (monthlyThreshold * taxRates.taxRate1) +
((taxBase – monthlyThreshold) * taxRates.taxRate2);
if (taxRates.monthlyTaxFreeReduction > 0) {
tax -= taxRates.monthlyTaxFreeReduction;
}
}
// Ensure tax isn’t negative
tax = Math.max(0, tax);
// Calculate net salary
const netSalary = grossMonthly – totalSocialContributions – healthInsurance – tax;
return Math.round(netSalary * 100) / 100;
}
function calculateSalaryForYear(externalYears, internalYears, countryCode) {
const baseCountrySalary = countryData[countryCode].baseSalary;
// Calculate base with inflation
const inflatedBase = baseCountrySalary * Math.pow(1 + INFLATION_RATE, internalYears);
// Calculate external experience bonus (3% per year)
const externalBonus = externalYears * EXTERNAL_RATE;
// Calculate cumulative internal bonus
let internalBonus = 0;
for (let year = 0; year < internalYears; year++) {
if (year < 5) {
internalBonus += 0.07; // First 5 years: 7% each
} else if (year < 10) {
internalBonus += 0.05; // Next 5 years: 5% each
} else if (year < 15) {
internalBonus += 0.03; // Next 5 years: 3% each
} else {
internalBonus += 0.02; // After that: 2% each
}
}
const totalMultiplier = 1 + externalBonus + internalBonus;
return inflatedBase * totalMultiplier;
}
function formatMoney(amount, currency) {
let formattedValue = amount.toFixed(2).replace(/\B(?=(\d{3})+(?!\d))/g, ",");
return `${formattedValue} ${currency}`;
}
function updateSalary() {
const externalYears = Math.max(0, parseInt(document.getElementById('external-years').value) || 0);
const countryCode = document.getElementById('location').value;
const currency = countryData[countryCode].currency;
// Update starting salary
const startingSalaryGross = calculateSalaryForYear(externalYears, 0, countryCode);
const startingSalaryNet = calculateNetSalary(startingSalaryGross, countryCode);
document.getElementById('result-gross').textContent = formatMoney(startingSalaryGross, currency);
document.getElementById('result-net').textContent = formatMoney(startingSalaryNet, currency);
// Generate projection table
let tableHTML = '';
// Calculate base salary without any bonuses
const baseGrossSalary = countryData[countryCode].baseSalary;
for (let year = 0; year <= 6; year++) {
const grossSalary = calculateSalaryForYear(externalYears, year, countryCode);
const netSalary = calculateNetSalary(grossSalary, countryCode);
// Calculate the same salary but without inflation to isolate the experience bonus
const inflatedBase = baseGrossSalary * Math.pow(1 + INFLATION_RATE, year);
const experienceBonus = ((grossSalary – inflatedBase) / inflatedBase) * 100;
tableHTML += `
`;
}
document.getElementById(‘projection-table’).innerHTML = tableHTML;
}
// Initialize the calculator
function initializeCalculator() {
const externalYearsInput = document.getElementById(‘external-years’);
const locationSelect = document.getElementById(‘location’);
const calculatorElement = document.getElementById(‘salary-calculator’);
const loadingElement = document.getElementById(‘calculator-loading’);
if (externalYearsInput && locationSelect && calculatorElement && loadingElement) {
// Hide loading, show calculator
loadingElement.style.display = ‘none’;
calculatorElement.classList.add(‘loaded’);
// Set up event listeners
externalYearsInput.addEventListener(‘input’, updateSalary);
locationSelect.addEventListener(‘change’, updateSalary);
// Initial calculation
updateSalary();
return true;
}
return false;
}
// Try to initialize immediately
if (!initializeCalculator()) {
// If initial attempt fails, retry a few times
let attempts = 0;
const maxAttempts = 5;
const retryInterval = setInterval(() => {
attempts++;
if (initializeCalculator() || attempts >= maxAttempts) {
clearInterval(retryInterval);
if (attempts >= maxAttempts) {
// Show refresh hint if all attempts fail
const loadingElement = document.getElementById(‘calculator-loading’);
if (loadingElement) {
loadingElement.classList.add(‘show-refresh’);
}
}
}
}, 1000);
}
})();
End of calculator 🎉
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