Several retailers have announced plans to start selling antigen tests for as little as €3.
It comes despite the recent delay to the Government's plans to introduce subsidised antigen tests.
Health Minister Stephen Donnelly was due to bring a memo to Cabinet earlier this week, but the plans were pushed back as talks with retailers continue.
It had been expected subsidised tests would be available in pharmacies for €2-3.
However, two separate retailers have announced plans to start selling cheaper tests anyway.
Supermarket chain Lidl announced it will be selling individual tests for €2.99 from tomorrow.
It notes the tests are approved for use in Ireland and the EU.
Lidl CEO JP Scally said making the tests "affordable and accessible for everyone is the right thing to do".
Meanwhile, pharmacy group McCauley is also cutting antigen test prices.
A single test will cost €5, while a five-pack has been reduced from €24 to €15.
Tony McEntee, Chief Executive of McCauley, said the rapid tests can "complement existing measures and can provide added reassurance as society continues to reopen, provided that they are used in accordance with public health advice".
Health officials have encouraged anyone engaged in 'high-risk' activities - such as going to restaurants, bars, nightclubs and cinemas - to use rapid tests twice a week.
However, they've also repeatedly warned a negative result should not be used as a green light for anyone with symptoms to stop isolating.