Why do I have to make quarterly estimated income tax payments?
You must make estimated income tax payments throughout the year if you expect to owe more than $100 for individuals and partnerships or $250 for corporations. Quarterly payments are due on or before April 30, June 30, September 30, and January 31. With the first three payments made during the tax year for which they are paid, and the last payment made in the following year.

For fiscal year taxpayers, payments are due the last day of the fourth, sixth, and ninth month during the year for which the payments are made and the end of the thirteenth month following the beginning of the fiscal year.

Show All Answers

1. How does Portland spend funds generated through the Income Tax?
2. What is the tax rate for the City of Portland Income Tax?
3. Why do I have to make quarterly estimated income tax payments?
4. How do I file for an extension of time?
5. What are the penalty and interest charges if I pay my income tax late?
6. Can I e-file my Portland income tax return?
7. Who needs to file a City of Portland Individual Income Tax Return (P-1040)
8. I lived in the City of Portland for part of the year. How do I file?
9. I lived in the City of Portland for part of the year, and I worked in the City all of the year. How do I file?
10. What is taxable income?
11. What is nontaxable income?
12. What deductions are allowable when filing the City of Portland Individual Income Tax Return (P-1040)
13. Who must file a City of Portland Corporate Income Tax Return (P-1040)
14. Who must file a City of Portland Partnership Income Tax Return (P-1065)?
15. Can a partnership pay the City Income Tax for the partners?
16. Who must withhold Portland City Income Tax?
17. How do I file and pay my withholding?
18. When are my withholding payments due?
19. I do not have withholding for this quarter. What do I do?
20. Who has to file a City of Portland Fiduciary Income Tax return (P-1041)?
21. Helpful Hints