Income Tax Calculator (Old Regime) Dry Run in C

Income Tax Calculator (Old Regime) is an interactive C dry run visualizer from the If programs section. Study the source code, then use the execution controls to follow each step, variable update, highlighted line, and console output.

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Income Tax Calculator (Old Regime) Program Code

#include <stdio.h>
int main() {
    float annual_income, tax = 0;
    
    printf("Enter your annual income (in rupees): ");
    scanf("%f", &annual_income);
    
    if (annual_income <= 250000) {
        tax = 0;
        printf("\nNo Tax Liability\n");
        printf("Income up to ₹2,50,000 is tax-free\n");
    }
    else if (annual_income <= 500000) {
        tax = (annual_income - 250000) * 0.05;
        printf("\nTax Slab: 5%% on amount above ₹2,50,000\n");
        printf("Rebate under Section 87A may apply\n");
    }
    else if (annual_income <= 1000000) {
        tax = 12500 + (annual_income - 500000) * 0.20;
        printf("\nTax Slab: ₹12,500 + 20%% on amount above ₹5,00,000\n");
    }
    else {
        tax = 112500 + (annual_income - 1000000) * 0.30;
        printf("\nTax Slab: ₹1,12,500 + 30%% on amount above ₹10,00,000\n");
    }
    
    if (annual_income <= 500000 && tax > 0) {
        tax = 0;
        printf("\n Rebate under Section 87A applied\n");
        printf("Tax liability reduced to NIL\n");
    }
    
    float cess = tax * 0.04;
    float total_tax = tax + cess;
    
    printf("\n========================================\n");
    printf("       INCOME TAX CALCULATION\n");
    printf("========================================\n");
    printf("Annual Income        : ₹%.2f\n", annual_income);
    printf("Income Tax (before cess): ₹%.2f\n", tax);
    printf("Health & Education Cess: ₹%.2f (4%%)\n", cess);
    printf("----------------------------------------\n");
    printf("TOTAL TAX PAYABLE     : ₹%.2f\n", total_tax);
    
    if (total_tax == 0) {
        printf("\n No tax payable. Great savings!\n");
    } else {
        printf("\nEffective Tax Rate   : %.2f%%\n", (total_tax / annual_income) * 100);
    }
    printf("========================================\n");
    
    return 0;
}

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