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Office of Management & Finance

Revenue Bureau

Revenue is being re-organized under the Bureau of Revenue and Financial Services.

Phone: 503-823-5157

Arts Tax: 503-865-4278

111 SW Columbia St, Suite 600, Portland, OR 97201

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BTP: Short Tax Year Quarterly Estimated Payment

 City of Portland Revenue Bureau, License and Tax Division

Business Tax Policy: Short Tax Year Quarterly Estimated Payment

PCC Section 7.02.530 and MCC Section 12.530 provides a schedule for payment of estimated tax for tax filers required to make these payments. This schedule was designed under the assumption that the length of the tax year is a full year. Estimated payments are required for short tax years when the tax for the short year exceeds $1,000. The following schedule is provided as guidance for tax filers with a tax year of less than one year.

If the length of your tax year is 1 month:

  • 1 payment equal to 100% of the prior year’s tax or 90% of the current year’s tax is due by the last day of the 1st month.

If the length of your tax year is 2 months:

  • 1 payment equal to 100% of the prior year’s tax or 90% of the current year’s tax is due by the 15th day of the 2nd month.

If the length of your tax year is 3 months:

  • 1 payment equal to 100% of the prior year’s tax or 90% of the current year’s tax is due by the 15th day of the 3rd month.

If the length of your tax year is 4 months:

  • 1 payment equal to 100% of the prior year’s tax or 90% of the current year’s tax is due by the 15th day of the 4th month.

If the length of your tax year is 5 months:

  • 1 payment equal to 25% of the prior year’s tax or 22.5% of the current year’s tax is due by the 15th day of the 4th month.
  • 1 payment equal to 75% of the prior year’s tax or 67.5% of the current year’s tax is due by the 15th day of the 5th month.

If the length of your tax year is 6 months:

  • 1 payment equal to 25% of the prior year’s tax or 22.5% of the current year’s tax is due by the 15th day of the 4th month.
  • 1 payment equal to 75% of the prior year’s tax or 67.5% of the current year’s tax is due by the 15th day of the 6th month.

If the length of your tax year is 7 months:

  • 1 payment equal to 25% of the prior year’s tax or 22.5% of the current year’s tax is due by the 15th day of the 4th month.
  • 1 payment equal to 25% of the prior year’s tax or 22.5% of the current year’s tax is due by the 15th day of the 6th month.
  • 1 payment equal to 50% of the prior year’s tax or 45% of the current year’s tax is due by the 15th day of the 7th month.

If the length of your tax year is 8 months:

  • 1 payment equal to 25% of the prior year’s tax or 22.5% of the current year’s tax is due by the 15th day of the 4th month.
  • 1 payment equal to 25% of the prior year’s tax or 22.5% of the current year’s tax is due by the 15th day of the 6th month.
  • 1 payment equal to 50% of the prior year’s tax or 45% of the current year’s tax is due by the 15th day of the 8th month.

If the length of your tax year is 9 months:

  • 1 payment equal to 25% of the prior year’s tax or 22.5% of the current year’s tax is due by the 15th day of the 4th month.
  • 1 payment equal to 25% of the prior year’s tax or 22.5% of the current year’s tax is due by the 15th day of the 6th month.
  • 1 payment equal to 50% of the prior year’s tax or 45% of the current year’s tax is due by the 15th day of the 9th month.

If the length of your tax year is 10 months:

  • 1 payment equal to 25% of the prior year’s tax or 22.5% of the current year’s tax is due by the 15th day of the 4th month.
  • 1 payment equal to 25% of the prior year’s tax or 22.5% of the current year’s tax is due by the 15th day of the 6th month.
  • 1 payment equal to 25% of the prior year’s tax or 22.5% of the current year’s tax is due by the 15th day of the 9th month.
  • 1 payment equal to 25% of the prior year’s tax or 22.5% of the current year’s tax is due by the 15th day of the 10th month.

If the length of your tax year is 11 months:

  • 1 payment equal to 25% of the prior year’s tax or 22.5% of the current year’s tax is due by the 15th day of the 4th month.
  • 1 payment equal to 25% of the prior year’s tax or 22.5% of the current year’s tax is due by the 15th day of the 6th month.
  • 1 payment equal to 25% of the prior year’s tax or 22.5% of the current year’s tax is due by the 15th day of the 9th month.
  • 1 payment equal to 25% of the prior year’s tax or 22.5% of the current year’s tax is due by the 15th day of the 11th month.

Note: Any portion of a month is considered a full month.


7-8-2009                             Sue Klobertanz
________________         ____________________________________
Date                                    Director, Revenue Bureau


Adopted 4-12-1996
Revised 7/2009