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Is the year-end bonus in Hangzhou included in the social security base according to the difference?

According to the Notice of the General Office of Hangzhou Municipal People's Government on Printing and Distributing the Enterprise Annuity System and Management Measures in Hangzhou, the calculation method of incorporating the year-end bonus into the social security base is to compare the individual year-end bonus with the average salary of the previous year. If the individual's year-end bonus exceeds 3 times the average salary of the previous year, then the individual needs to pay social security according to 50% of the excess.