@equisoft/tax-ca - npm Package Compare versions

Comparing version 2021.1.5 to 2021.2.0

dist/taxes/income-tax.d.ts

@@ -29,4 +29,4 @@ import { FederalCode, ProvinceCode } from '../misc/code-types';
 export declare function getMaxFederalMarginalRate(provincialCode: ProvinceCode): number;
-export declare function getTotalMaxMarginalRate(provincialCode: ProvinceCode): string;
+export declare function getTotalMaxMarginalRate(provincialCode: ProvinceCode): number;
 export declare function getTotalTaxAmount(provincialCode: ProvinceCode, grossIncome: number, inflationRate?: number, yearsToInflate?: number): number;
 export declare function calculateEffectiveTaxRate(income: number, province: ProvinceCode): number;

dist/taxes/income-tax.js

@@ -14,2 +14,3 @@ "use strict";
 const code_types_1 = require("../misc/code-types");
+const utils_1 = require("../utils");
 const collections_1 = require("../utils/collections");
@@ -440,65 +441,71 @@ exports.TAX_BRACKETS = {
 };
+function inflate(amount, inflationRate, yearsToInflate) {
+    return amount * (Math.pow((1 + inflationRate), yearsToInflate));
+}
 function extractRate(rates, income, inflationRate, yearsToInflate) {
-    let tax = 0;
-    rates.forEach((bracket) => {
-        const bracketFrom = bracket.FROM * (Math.pow((1 + inflationRate), yearsToInflate));
-        if (bracketFrom < income) {
-            const bracketTo = bracket.TO * (Math.pow((1 + inflationRate), yearsToInflate));
-            tax += (Math.min(income, bracketTo) - bracketFrom) * bracket.RATE;
-        }
-    });
-    return tax;
+    const reducer = (previous, current) => {
+        const bracketFrom = inflate(current.FROM, inflationRate, yearsToInflate);
+        const bracketTo = inflate(current.TO, inflationRate, yearsToInflate);
+        const bracketTax = bracketFrom < income ? (Math.min(income, bracketTo) - bracketFrom) * current.RATE : 0;
+        return previous + bracketTax;
+    };
+    return rates.reduce(reducer, 0);
 }
+function getTaxRates(code) {
+    return exports.TAX_BRACKETS[code].RATES;
+}
+function getAbatement(code) {
+    return exports.TAX_BRACKETS[code].ABATEMENT;
+}
+function getSurtaxRates(code) {
+    return exports.TAX_BRACKETS[code].SURTAX_RATES;
+}
+function getRate(brackets, grossIncome, inflationRate, yearsToInflate) {
+    const reducer = (previous, current) => {
+        const bracketFrom = inflate(current.FROM, inflationRate, yearsToInflate);
+        return bracketFrom < grossIncome ? current.RATE : previous;
+    };
+    return brackets.reduce(reducer, 0);
+}
 function getFederalTaxAmount(grossIncome, inflationRate = 0, yearsToInflate = 0) {
-    return extractRate(exports.TAX_BRACKETS.CA.RATES, grossIncome, inflationRate, yearsToInflate);
+    return extractRate(getTaxRates(code_types_1.FEDERAL_CODE), grossIncome, inflationRate, yearsToInflate);
 }
 exports.getFederalTaxAmount = getFederalTaxAmount;
 function getProvincialTaxAmount(province, grossIncome, inflationRate = 0, yearsToInflate = 0) {
-    return extractRate(exports.TAX_BRACKETS[province].RATES, grossIncome, inflationRate, yearsToInflate);
+    return extractRate(getTaxRates(province), grossIncome, inflationRate, yearsToInflate);
 }
 exports.getProvincialTaxAmount = getProvincialTaxAmount;
 function getProvincialSurtaxAmount(province, baseTaxAmount, inflationRate = 0, yearsToInflate = 0) {
-    return extractRate(exports.TAX_BRACKETS[province].SURTAX_RATES, baseTaxAmount, inflationRate, yearsToInflate);
+    return extractRate(getSurtaxRates(province), baseTaxAmount, inflationRate, yearsToInflate);
 }
 exports.getProvincialSurtaxAmount = getProvincialSurtaxAmount;
 function getFederalBaseCredit(inflationRate, yearsToInflate) {
-    return exports.TAX_BRACKETS.CA.BASE_TAX_CREDIT
-        * exports.TAX_BRACKETS.CA.TAX_CREDIT_RATE
-        * (Math.pow((1 + inflationRate), yearsToInflate));
+    const baseTaxCredit = exports.TAX_BRACKETS.CA.BASE_TAX_CREDIT * exports.TAX_BRACKETS.CA.TAX_CREDIT_RATE;
+    return inflate(baseTaxCredit, inflationRate, yearsToInflate);
 }
 exports.getFederalBaseCredit = getFederalBaseCredit;
 function getProvincialAbatement(province, federalTaxAmount) {
-    return exports.TAX_BRACKETS[province].ABATEMENT * federalTaxAmount;
+    return getAbatement(province) * federalTaxAmount;
 }
 exports.getProvincialAbatement = getProvincialAbatement;
 function getFederalMarginalRate(provincialCode, grossIncome, inflationRate = 0, yearsToInflate = 0) {
-    const fedTax = getFederalTaxAmount(grossIncome, inflationRate, yearsToInflate);
-    const fedBaseCredit = getFederalBaseCredit(inflationRate, yearsToInflate);
-    const fedProvAbatement = getProvincialAbatement(provincialCode, fedTax - fedBaseCredit);
-    return grossIncome <= 0 ? 0 : Math.max(fedTax - fedBaseCredit - fedProvAbatement, 0) / grossIncome;
+    const brackets = getTaxRates(code_types_1.FEDERAL_CODE);
+    const rate = getRate(brackets, grossIncome, inflationRate, yearsToInflate);
+    return rate * (1 - getAbatement(provincialCode));
 }
 exports.getFederalMarginalRate = getFederalMarginalRate;
 function getProvincialMarginalRate(provincialCode, grossIncome, inflationRate = 0, yearsToInflate = 0) {
-    let marginalRate = 0;
-    const baseTaxAmount = getProvincialTaxAmount(provincialCode, grossIncome, inflationRate, yearsToInflate);
-    exports.TAX_BRACKETS[provincialCode].RATES.forEach(bracket => {
-        const bracketFrom = bracket.FROM * (Math.pow((1 + inflationRate), yearsToInflate));
-        if (bracketFrom < grossIncome) {
-            marginalRate = bracket.RATE;
-        }
-    });
-    let surtaxRate = 0;
-    exports.TAX_BRACKETS[provincialCode].SURTAX_RATES.forEach(bracket => {
-        const bracketFrom = bracket.FROM * (Math.pow((1 + inflationRate), yearsToInflate));
-        if (bracketFrom < baseTaxAmount) {
-            surtaxRate = bracket.RATE;
-        }
-    });
-    return marginalRate * (1 + surtaxRate);
+    const taxAmount = getProvincialTaxAmount(provincialCode, grossIncome, inflationRate, yearsToInflate);
+    const taxCredit = getProvincialBaseCredit(provincialCode, inflationRate, yearsToInflate);
+    const provincialTaxAmount = Math.max(taxAmount - taxCredit, 0);
+    const taxBrackets = getTaxRates(provincialCode);
+    const surtaxBrackets = getSurtaxRates(provincialCode);
+    const taxRate = getRate(taxBrackets, grossIncome, inflationRate, yearsToInflate);
+    const surtaxRate = getRate(surtaxBrackets, provincialTaxAmount, inflationRate, yearsToInflate);
+    return taxRate + (taxRate * surtaxRate);
 }
 exports.getProvincialMarginalRate = getProvincialMarginalRate;
 function getProvincialBaseCredit(province, inflationRate, yearsToInflate) {
-    return exports.TAX_BRACKETS[province].BASE_TAX_CREDIT
-        * exports.TAX_BRACKETS[province].RATES[0].RATE
-        * (Math.pow((1 + inflationRate), yearsToInflate));
+    const baseTaxCredit = exports.TAX_BRACKETS[province].BASE_TAX_CREDIT * exports.TAX_BRACKETS[province].RATES[0].RATE;
+    return inflate(baseTaxCredit, inflationRate, yearsToInflate);
 }
@@ -509,3 +516,3 @@ exports.getProvincialBaseCredit = getProvincialBaseCredit;
     const fedRate = getFederalMarginalRate(provincialCode, grossIncome, inflationRate, yearsToInflate);
-    return provRate + fedRate;
+    return utils_1.roundToPrecision(provRate + fedRate, 4);
 }
@@ -515,6 +522,6 @@ exports.getTotalMarginalRate = getTotalMarginalRate;
     // tslint:disable-next-line:no-non-null-assertion
-    const marginalRate = collections_1.maxBy(exports.TAX_BRACKETS[provincialCode].RATES, (bracket) => bracket.TO).RATE;
+    const marginalRate = collections_1.maxBy(getTaxRates(provincialCode), (bracket) => bracket.TO).RATE;
     // tslint:disable-next-line:no-non-null-assertion
-    const surtaxRate = collections_1.maxBy(exports.TAX_BRACKETS[provincialCode].SURTAX_RATES, bracket => bracket.TO).RATE;
-    return marginalRate * (1 + surtaxRate);
+    const surtaxRate = collections_1.maxBy(getSurtaxRates(provincialCode), bracket => bracket.TO).RATE;
+    return marginalRate + (marginalRate * surtaxRate);
 }
@@ -524,4 +531,4 @@ exports.getMaxProvincialMarginalRate = getMaxProvincialMarginalRate;
     // tslint:disable-next-line:no-non-null-assertion
-    const maxRate = collections_1.maxBy(exports.TAX_BRACKETS[code_types_1.FEDERAL_CODE].RATES, bracket => bracket.TO).RATE;
-    return maxRate * (1 - exports.TAX_BRACKETS[provincialCode].ABATEMENT);
+    const maxRate = collections_1.maxBy(getTaxRates(code_types_1.FEDERAL_CODE), bracket => bracket.TO).RATE;
+    return maxRate * (1 - getAbatement(provincialCode));
 }
@@ -532,3 +539,3 @@ exports.getMaxFederalMarginalRate = getMaxFederalMarginalRate;
     const fedRate = getMaxFederalMarginalRate(provincialCode);
-    return (provRate + fedRate).toPrecision(4);
+    return utils_1.roundToPrecision(provRate + fedRate, 4);
 }
@@ -535,0 +542,0 @@ exports.getTotalMaxMarginalRate = getTotalMaxMarginalRate;

package.json

 {
   "name": "@equisoft/tax-ca",
-  "version": "2021.1.5",
+  "version": "2021.2.0",
   "description": "Canadian tax data and calculation functions.",
@@ -5,0 +5,0 @@ "main": "dist/index.js",

Fixed alerts

New author

Supply chain risk

A new npm collaborator published a version of the package for the first time. New collaborators are usually benign additions to a project, but do indicate a change to the security surface area of a package.

Found 1 instance in 1 package

Improved metrics

Total package byte prevSize

65176

increased by0.67%

Lines of code

1980

increased by0.35%

Number of medium supply chain risk alerts

0

decreased by-100%

No dependency changes