https://ontariopc.ca/wp-content/plugins/unity-wp-plugin/assets/tax-credit.js?ver=1758137784

1var TAX_CREDIT_BRACKETS = [
2  // please list brackets in order
3  { "limit": 500.05, "rate": 0.75 },
4  { "limit": 1666.82, "rate": 0.50 },
5  // (a) this is incredibly important to preserve - Finance Ontario explicitly says "0.3333" _not_ 1/3
6  // (b) NOTE: 3,792.22 is the tax credit limit, but 3,400.00 is the limit for a single party
7  { "limit": 3400.00, "rate": 0.3333 },
8];
9
10/**
11 * @param {number} donationAmount 
12 * @returns {number}
13 */
14function calculateTaxCredit(donationAmount) {
15  if (donationAmount < 0) {
16    return 0;
17  }
18  var donationAmountCredited = 0;
19  var creditAmount = 0;
20  for (var bracket of TAX_CREDIT_BRACKETS) {
21    var bracketDonationAmount = Math.min(donationAmount, bracket.limit) - donationAmountCredited;
22    creditAmount += bracketDonationAmount * bracket.rate;
23    donationAmountCredited += bracketDonationAmount;
24  }
25
26  return creditAmount;
27}
28
29/**
30 * @param {number} amount 
31 * @returns {string}
32 */
33function formatCurrency(amount) {
34  return amount.toLocaleString('en-CA', {
35    style: 'currency',
36    currency: 'CAD',
37    currencyDisplay: 'narrowSymbol',
38    useGrouping: true
39  });
40}