What are patent renewal fees? When are they due?

Renewal fees, also known as maintenance fees or annuities, are periodic fees payable to the patent office in order to maintain the currency and enforceability of a patent.  Renewals fees may increase over time.  This is to encourage patent owners to lapse their patent, and therefore allow the public to benefit from the technology in the patent, if the owner is no longer using or generating revenue from the patented invention.   

Renewal fees are generally due from the 4th year after the date of filing in New Zealand and Australia.

For more information, please visit our renewals page.