Oliver Niland & Co - Chartered Accountant and Tax Specialists

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What is preliminary tax ?

April 4, 2019

What is preliminary tax?

Preliminary tax is your estimate of the Income Tax, Pay Related Social Insurance (PRSI) and Universal Social Charge (USC) that you expect to pay for a tax year. You must pay this by 31 October of the tax year in question.

You must make sure that you do not under pay your preliminary tax, or you may be charged interest. The amount of preliminary tax for a year must be equal to, or more than, the lowest amount of the following:

  1. 90% of the tax due for that tax year
  2. 100% of the tax due for the immediately previous tax year
  3. 105% of the tax due for the tax year preceding the immediately previous tax year (often called the ‘pre-preceding year’).  This option only applies where you pay by direct debit. It does not apply if the tax due for the pre-preceding year was nil.

For late payments, you will be charged interest for each day (or part of a day) past the deadline. Currently this is 8% per annum

Any queries on the above give me a call on 091 763817 or email me at oliver@taxreturnhelp.ie

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Copyright © 2026 Oliver Niland & Co

About Us

Oliver Niland is a Chartered Accountant and a Tax Specialist with over 15 years experience of helping small business with tax issues and accounting challenges.

In addition, Oliver advises small businesses in terms of growing their business.

Contact Us

Contact us at:

Phone:   (091) 763817

Email:    oliver@taxreturnhelp.ie

Unit 8,  Royal Rock Park,

Ballybane Industrial Estate,

Galway.

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Contact Us

Oliver Niland & Co – Chartered Accountant
Unit 8, Royal Rock Park,
Ballybane Industrial Estate,
Galway.

Telephone:  (091)  763817
Mobile:  (087) 984 6979
Email:  oliver@taxreturnhelp.ie 

(Right across from Thomas McDonagh’s hardware store and directly behind the Royal Rock Café )