The seven-day home quarantine for household contacts will be scrapped in NSW at 6pm on Friday and 11.59pm in Victoria.
Close contacts will have to undertake daily rapid antigen tests, wear masks indoors and work from home where possible.
They will also have to notify their employers and avoid high-risk environments like hospitals and aged care settings.
In the ACT, household contact quarantine rules will be scrapped after Anzac Day.
ACT Health announced from 11.59pm on April 26 household contacts will not have to quarantine if they have no symptoms.
ACT Health Minister Rachel Stephen-Smith said the changes align with those made in NSW and Victoria wherever possible, while accounting for local conditions.
People are to limit their movement in the community and minimise risks by wearing a mask indoors, avoiding crowded places, testing, working from home where possible and not entering high-risk settings for seven days.
NSW Premier Dominic Perrottet said the easing of restrictions was an important milestone for the state after an "incredibly challenging" two years.
"People haven't been able to say goodbye to their loved ones, weddings have been postponed, people have lost jobs," he told Sydney radio 2GB on Thursday.
"When it comes to COVID I think we all have a lot to be proud of. These changes (are) another mark in our COVID journey."
The government would work with unions to determine which industries would still require workers to be vaccinated, with the health and education sectors likely to keep the vaccine mandate.
From April 30, hotel quarantine for unvaccinated international returning travellers will also end in NSW, while social distancing on public transport will also be ditched, but masks will still be required for commuters as well as on planes, inside airports and cruise terminals.
Industry groups welcomed the easing of restrictions, which they say will help address staffing shortages, particularly in retail and hospitality.
LATEST 24-HOUR COVID-19 DATA FROM ACROSS AUSTRALIA:
NSW: 17,447 cases, 16 deaths, 1641 in hospital, 69 in ICU
VIC: 10,674 cases, 11 deaths, 444 in hospital, 35 in ICU
QLD: 9281 cases, 15 death, 58 in hospital, one in ICU
TAS: 1468 cases, one death, 58 in hospital, one in ICU
WA: 9314 cases, two historical deaths, 248 in hospital, nine in ICU
SA: 4079 cases, three deaths, 241 in hospital, 11 in ICU
ACT: 1265 cases, one death, 61 in hospital, three in ICU
NT: 655 cases, one death, 49 in hospital, one in ICU
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