Example: FBR Income Tax Calculator (Simplified) in C++

// FBR Income Tax Calculator (Simplified)
#include <iostream>
#include <iomanip> // For formatting output

using namespace std;

int main() {
    double annualIncome = 0;
    double taxPayable = 0;

    // Step 1: Get annual income from the user
    cout << "------------------------------------------" << endl;
    cout << "  Simplified FBR Income Tax Calculator" << endl;
    cout << "------------------------------------------" << endl;
    cout << "Enter your annual income (PKR): ";
    cin >> annualIncome;

    // Step 2: Apply simplified FBR-like tax policy
    // Note: This policy is illustrative and NOT the actual FBR policy.
    // Consult official FBR sources for current tax rates.

    if (annualIncome <= 600000) {
        // Slab 1: Up to PKR 600,000 - 0% tax
        taxPayable = 0;
    } else if (annualIncome <= 1200000) {
        // Slab 2: PKR 600,001 to 1,200,000 - 2.5% on amount exceeding 600,000
        taxPayable = (annualIncome - 600000) * 0.025;
    } else if (annualIncome <= 1800000) {
        // Slab 3: PKR 1,200,001 to 1,800,000 - PKR 15,000 + 12.5% on amount exceeding 1,200,000
        taxPayable = 15000 + (annualIncome - 1200000) * 0.125;
    } else if (annualIncome <= 2500000) {
        // Slab 4: PKR 1,800,001 to 2,500,000 - PKR 90,000 + 20% on amount exceeding 1,800,000
        taxPayable = 90000 + (annualIncome - 1800000) * 0.20;
    } else if (annualIncome <= 3500000) {
        // Slab 5: PKR 2,500,001 to 3,500,000 - PKR 230,000 + 25% on amount exceeding 2,500,000
        taxPayable = 230000 + (annualIncome - 2500000) * 0.25;
    } else {
        // Slab 6: Above PKR 3,500,000 - PKR 480,000 + 30% on amount exceeding 3,500,000
        taxPayable = 480000 + (annualIncome - 3500000) * 0.30;
    }

    // Step 3: Display the calculated tax
    cout << fixed << setprecision(2); // Format output to 2 decimal places
    cout << "------------------------------------------" << endl;
    cout << "Your annual income: PKR " << annualIncome << endl;
    cout << "Tax payable:        PKR " << taxPayable << endl;
    cout << "------------------------------------------" << endl;

    return 0;
}