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calculator.js
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calculator.js
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/**
* Desde 0 hasta 12.450 euros: retención del 19%.
* Desde 12.450 hasta 20.199 euros: retención del 24%.
* Desde 20.200 hasta 35.199 euros: retención del 30%.
* Desde 35.200 hasta 59.999 euros: retención del 37%.
* Desde 60.000 hasta 299.999 euros: retención del 45%.
* Más de 300.000 euros: retención del 47%.
*/
irpfSections = [
[0, 12450, 19],
[12450, 20199, 24],
[20200, 35199, 30],
[35200, 59999, 37],
[60000, 299999, 45],
[300000, 100000000, 47],
];
commonContingenciesContibutionRate = 4.82; // cotización cont. comúm
vocationalTrainingContibutionRate = 0.1; // cotización formación
unemploymentContributioRate = 1.55; // cotización desempleo
let $salary,
$salaryPayments,
$totalIrpf,
$totalIrpfRate,
$annualNet,
$mensualNet;
window.addEventListener("load", function () {
[
$salary,
$salaryPayments,
$totalIrpf,
$totalIrpfRate,
$annualNet,
$mensualNet,
$commonContingenciesContibution,
$vocationalTrainingContibution,
$unemploymentContribution,
] = getDocumentElements();
$salary.addEventListener("input", calcular);
$salaryPayments.addEventListener("input", calcular);
});
function calcular() {
const salary = parseFloat($salary.value);
const salaryPayments = parseFloat($salaryPayments.value);
let pending = salary;
let totalIrpf = calculateTotalTax(pending);
const totalIrpfRate = (totalIrpf * 100) / salary;
const commonContingenciesContibution =
(salary * commonContingenciesContibutionRate) / 100;
const vocationalTrainingContibution =
(salary * vocationalTrainingContibutionRate) / 100;
const unemploymentContribution = (salary * unemploymentContributioRate) / 100;
const annualNet =
salary -
totalIrpf -
commonContingenciesContibution -
vocationalTrainingContibution -
unemploymentContribution;
const mensualNet = annualNet / salaryPayments;
setResults(
totalIrpf,
totalIrpfRate,
annualNet,
mensualNet,
commonContingenciesContibution,
vocationalTrainingContibution,
unemploymentContribution
);
}
function setResults(
totalIrpf,
totalIrpfRate,
annualNet,
mensualNet,
commonContingenciesContibution,
vocationalTrainingContibution,
unemploymentContribution
) {
$totalIrpf.innerText = formatNumber(totalIrpf);
$totalIrpfRate.innerText = formatNumber(totalIrpfRate, "%");
$annualNet.innerText = formatNumber(annualNet);
$mensualNet.innerText = formatNumber(mensualNet);
$commonContingenciesContibution.innerText = formatNumber(
commonContingenciesContibution
);
$vocationalTrainingContibution.innerText = formatNumber(
vocationalTrainingContibution
);
$unemploymentContribution.innerText = formatNumber(unemploymentContribution);
}
function formatNumber(value, suffix = "€") {
const parts = value.toFixed(2).toString().split(".");
parts[0] = parts[0].replace(/\B(?=(\d{3})+(?!\d))/g, ".");
return parts.join(",") + " " + suffix;
}
function getDocumentElements() {
const $salary = document.getElementById("salary");
const $salaryPayments = document.getElementById("salaryPayments");
const $totalIrpf = document.getElementById("totalIrpf");
const $totalIrpfRate = document.getElementById("totalIrpfRate");
const $annualNet = document.getElementById("annualNet");
const $mensualNet = document.getElementById("mensualNet");
const $commonContingenciesContibution = document.getElementById(
"commonContingenciesContibution"
);
const $vocationalTrainingContibution = document.getElementById(
"vocationalTrainingContibution"
);
const $unemploymentContribution = document.getElementById(
"unemploymentContribution"
);
return [
$salary,
$salaryPayments,
$totalIrpf,
$totalIrpfRate,
$annualNet,
$mensualNet,
$commonContingenciesContibution,
$vocationalTrainingContibution,
$unemploymentContribution,
];
}
function calculateTotalTax(pending) {
let totalIrpf = 0;
for (const section of irpfSections) {
const [lower, upper, rate] = section;
if (pending > upper) {
totalIrpf += (upper - lower) * (rate / 100);
} else {
totalIrpf += (pending - lower) * (rate / 100);
break;
}
}
return totalIrpf;
}