Calculate monthly income tax, social insurance contributions, and net salary based on China's current individual income tax policy (¥5,000 threshold, 7 tax brackets), with support for special additional deductions.
China uses a progressive tax rate with 7 brackets (3%-45%). Tax = (Gross - Social Insurance - 5000 deduction - Special deductions) x Rate - Quick deduction.
Five insurances: pension, medical, unemployment, work injury, maternity. One fund: housing provident fund. Rates vary by city.
2024 special deductions: children education (2000 per child/month), continuing education (400-800/month), major medical expenses (up to 80000/year), housing loan interest (1000/month), housing rent (800-1500/month by city), supporting elderly parents (up to 2000/month), and infants under 3 (2000 per child/month).
The marginal tax rate is the rate applied to the last dollar of income (e.g., 30%), while the effective tax rate is total tax divided by total income — usually much lower than the marginal rate. For example, a taxpayer in the 30% bracket may have an effective rate of only 15-20%. Focus on the effective rate for tax planning; use the marginal rate to evaluate the after-tax value of additional income.