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4th Quarter 2018 Due Dates

October 1:

  • Businesses: Deadline for establishing a new SIMPLE retirement plan for 2018; Deadline to provide written notice to employees related to Qualified Small Employer Health Reimbursement Arrangement (QSEHRA) plans that begin on January 1, 2019

October 15:

  • Individuals: 2017 return due (Form 1040) if on extension
  • Calendar-year C corporations: 2017 return due (Form 1120) if on extension

October 31:

  • Employers: File Form 941 for 3rd quarter 2018

During November:

  • Employers: Request Form W-4s from employees whose withholding allowances will be different in 2019

December 17:

  • Calendar-year C Corporations: 4th installment of 2018 estimated tax due
Do you have the support you need to manage your small business bookkeeping? Schedule a 30-minute appointment to speak with a local small business adviser.

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